CN113315110B - DC power supply circuit - Google Patents
DC power supply circuit Download PDFInfo
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- CN113315110B CN113315110B CN202110865529.XA CN202110865529A CN113315110B CN 113315110 B CN113315110 B CN 113315110B CN 202110865529 A CN202110865529 A CN 202110865529A CN 113315110 B CN113315110 B CN 113315110B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/08—Three-wire systems; Systems having more than three wires
- H02J1/084—Three-wire systems; Systems having more than three wires for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
- H02J1/086—Three-wire systems; Systems having more than three wires for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load or loads and source or sources when the main path fails
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Abstract
The invention relates to a direct current power supply circuit, which comprises a first power supply board card, a second power supply board card and at least one load board card, wherein the first power supply board card comprises a first direct current power supply module and a second direct current power supply module, the second power supply board card comprises a third direct current power supply module and a fourth direct current power supply module, and the load board card comprises a first direct current voltage regulating module and a second direct current voltage regulating module. When a single power supply board card fails, the other power supply board card is also connected with two power supplies, and a power supply loop has redundancy, so that the power supply reliability is improved.
Description
Technical Field
The invention relates to the technical field of power electronics, in particular to a direct current power supply circuit.
Background
The high-voltage direct-current transmission has large transmission capacity, and the stable operation of the high-voltage direct-current transmission is important for the reliability of the whole power grid, so the requirements on the power supply reliability of the control protection device and the valve control device are high.
In order to ensure the power supply reliability, at present, two independent 220V direct current power supplies are connected to each control protection screen cabinet and each valve control screen cabinet to ensure the power supply reliability, a power supply board card is respectively configured for each 220V direct current power supply to carry out voltage transformation, the power supply board cards are connected to the same bus on a back plate through a pin socket connector, a load board card is inserted into a chassis back plate, and electricity is taken through the back plate bus.
The power taking port of the load board card is connected with a capacitor, and once a short-circuit fault occurs, all the load board cards connected to a bus can be affected due to the fact that the load board cards share the single bus, and the high-voltage direct-current power transmission system is tripped; in addition, if a single power supply board card is damaged, only a single power supply is left, and the power supply reliability is poor.
Disclosure of Invention
Therefore, it is necessary to provide a dc power supply circuit having high power supply reliability.
A dc power supply circuit comprising:
the first power supply board card comprises a first direct-current power supply module and a second direct-current power supply module, wherein the input end of the first direct-current power supply module is used for being connected with a first direct-current power supply, and the input end of the second direct-current power supply module is used for being connected with a second direct-current power supply;
the second power supply board card comprises a third direct-current power supply module and a fourth direct-current power supply module, wherein the input end of the third direct-current power supply module is used for being connected with a first direct-current power supply, and the input end of the fourth direct-current power supply module is used for being connected with a second direct-current power supply;
at least one load board card, the load board card comprises a first direct current voltage regulating module and a second direct current voltage regulating module, the output end of the first direct current power supply module and the output end of the second direct current power supply module are electrically connected to the input end of the first direct current voltage regulating module, the output end of the first direct current voltage regulating module is used for electrically connecting a load element, the output end of the third direct current module and the output end of the fourth direct current module are electrically connected to the input end of the second direct current voltage regulating module, and the output end of the second direct current voltage regulating module is used for electrically connecting the load element.
In one embodiment, the first dc power supply module includes:
the input fault detection unit is used for detecting the input voltage of the first direct-current power supply module and outputting a first detection signal when the input voltage of the first direct-current power supply module is abnormal;
the output fault detection unit is used for detecting the output voltage of the first direct-current power supply module and outputting a second detection signal when the output voltage of the first direct-current power supply module is abnormal;
in one embodiment, the first dc power supply module further includes an or gate unit, and the or gate unit is respectively connected to the input fault detection unit and the output fault detection unit, and configured to output a fault signal when receiving the first detection signal and/or the second detection signal.
In one embodiment, the first dc power supply module further includes:
the input indicating unit is connected with the input fault detection unit and used for indicating when the input voltage of the first direct current power supply module is abnormal;
the output indicating unit is connected with the output fault detection unit and used for indicating when the output voltage of the first direct current power supply module is abnormal;
in one embodiment, the input indicating unit comprises an indicator light and/or the output indicating unit comprises an indicator light.
In one embodiment, the first dc power supply module includes:
one end of the first fuse is used for being electrically connected with the first direct current power supply;
and the input end of the voltage regulating unit is electrically connected with the other end of the first fuse wire, and the output end of the voltage regulating unit is electrically connected with the input end of the first direct current voltage regulating module.
In one embodiment, the first dc power supply module further includes an energy storage unit, the energy storage unit includes an inductor, a capacitor, and a first diode, one end of the inductor is electrically connected to the other end of the first fuse, the other end of the inductor is electrically connected to one end of the capacitor, the other end of the capacitor is grounded, a cathode of the first diode is electrically connected to the other end of the first fuse, and an anode of the first diode is electrically connected to the other end of the inductor.
In one embodiment, the load board may further include a second fuse, one end of the second fuse is electrically connected to the output terminal of the first dc power supply module and the output terminal of the second dc power supply module, and the other end of the second fuse is electrically connected to the input terminal of the first dc voltage regulating module.
In one embodiment, the load board further comprises a second diode, wherein the anode of the second diode is electrically connected with the output end of the first direct current voltage regulating module, and the cathode of the second diode is used for being electrically connected with the load element.
In one embodiment, the dc power supply circuit further includes:
the anode of the third diode is electrically connected with the output end of the first direct current power supply module, and the cathode of the third diode is electrically connected with the input end of the first direct current voltage regulating module;
and the anode of the fourth diode is electrically connected with the output end of the second direct current power supply module, and the cathode of the fourth diode is electrically connected with the input end of the first direct current voltage regulating module.
The direct-current power supply circuit comprises a first power supply board card, a second power supply board card and at least one load board card, wherein the first power supply board card comprises a first direct-current power supply module and a second direct-current power supply module, the second power supply board card comprises a third direct-current power supply module and a fourth direct-current power supply module, the load board card comprises a first direct-current voltage regulating module and a second direct-current voltage regulating module, when the first direct-current voltage regulating module is in short circuit (or the second direct-current voltage regulating module is in short circuit), although the power supply capacity of the first direct-current power supply module and the power supply capacity of the second direct-current power supply module (or the third direct-current power supply module and the fourth direct-current power supply module) which are connected with the first direct-current voltage regulating module can be influenced, the third direct-current power supply module and the fourth direct-current power supply module (or the first direct-current power supply module and the second direct-current power supply module) can still supply power for the load board card. When the first power supply board card fails (or the second power supply board card fails), the second power supply board card (or the first power supply board card) can also realize two-way power supply, and the direct-current power supply circuit also has redundancy, so that the power supply reliability is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a dc power supply circuit according to an embodiment;
fig. 2 is a schematic structural diagram of a first dc power supply module in fig. 1;
fig. 3 is a schematic structural diagram of a load board card in fig. 1.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first resistance may be referred to as a second resistance, and similarly, a second resistance may be referred to as a first resistance, without departing from the scope of the present application. The first resistance and the second resistance are both resistances, but they are not the same resistance.
It is to be understood that "connection" in the following embodiments is to be understood as "electrical connection", "communication connection", and the like if the connected circuits, modules, units, and the like have communication of electrical signals or data with each other.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.
Referring to fig. 1, a dc power supply circuit according to an embodiment of the present disclosure is shown. As shown in fig. 1, the dc power supply circuit 100 may include a first power board 110, a second power board 120, and a load board 130. Specifically, the first power board 110 may include a first dc power module 112 and a second dc power module 114. The second power board 120 may include a third dc power module 122 and a fourth dc power module 124. The load board 130 may include a first dc voltage regulation module 132 and a second dc voltage regulation module 134. It should be noted that the dc power supply circuit 100 includes at least one load board 130. Optionally, the first dc voltage regulating module 132 includes a capacitor, and the second dc voltage regulating module 134 includes a capacitor.
Specifically, the first dc power module 112 is configured to be connected to a first dc power supply, the second dc power module 114 is configured to be connected to a second dc power supply, the third dc power module 122 is configured to be connected to the first dc power supply, and the fourth dc power module 124 is configured to be connected to the second dc power supply. The input end of the first dc voltage regulating module 132 is electrically connected to the output end of the first dc power supply module 112 and the output end of the second dc power supply module 114, and the output end of the first dc voltage regulating module 132 is electrically connected to the load element 136. The input end of the second dc voltage regulating module 134 is electrically connected to the output end of the third dc module 122 and the output end of the fourth dc module 124, and the output end of the second dc voltage regulating module 134 is electrically connected to the load element 136.
It should be noted that the first dc power module 112 may be configured to adjust a voltage of the first dc power input to the input terminal of the first dc power module 112, and output the adjusted dc voltage to the input terminal of the first dc voltage regulating module 132 through the output terminal of the first dc power module 112. The second dc power module 114 may be configured to adjust a voltage of a second dc power input to an input terminal of the second dc power module 114, and output the adjusted dc voltage to an input terminal of the first dc voltage regulating module 132 through an output terminal of the second dc power module 114. The third dc power module 122 may be configured to adjust a voltage of the first dc power input to an input terminal of the third dc power module 122, and output the adjusted dc voltage to an input terminal of the second dc voltage regulating module 134 through an output terminal of the third dc power module 122. The fourth dc power module 124 may be configured to adjust a voltage of the second dc power input to the input terminal of the fourth dc power module 124, and output the adjusted dc voltage to the input terminal of the second dc voltage regulating module 134 through the output terminal of the fourth dc power module 124. Optionally, the first dc power supply module may include a voltage dropping unit or a voltage boosting unit. Optionally, the second dc power supply module may include a voltage dropping unit or a voltage boosting unit. Optionally, the third dc power supply module may include a voltage step-down unit or a voltage step-up unit. Optionally, the fourth dc power supply module may include a voltage step-down unit or a voltage step-up unit. Optionally, the first dc power supply is a 220V dc power supply. Optionally, the second dc power supply is a 220V dc power supply.
It should be noted that the first dc voltage regulating module 132 may be configured to regulate a dc voltage input to an input terminal of the first dc voltage regulating module 132, and output the regulated dc voltage to the load element 136 through an output terminal of the first dc voltage regulating module 132. The second dc voltage regulating module 134 may be configured to regulate a dc voltage input to an input terminal of the second dc voltage regulating module 132, and output the regulated dc voltage to the load element 136 through an output terminal of the second dc voltage regulating module 132.
Optionally, the dc power supply circuit may further include a first bus bar and a second bus bar. Optionally, the output end of the first dc power supply module is electrically connected to the first bus, the output end of the second dc power supply module is electrically connected to the first bus, and the input end of the first dc voltage regulating module is electrically connected to the first bus. Optionally, an output end of the third dc power supply module is electrically connected to the second bus, an output end of the fourth dc power supply module is electrically connected to the second bus, and an input end of the second dc voltage regulating module is electrically connected to the second bus. The above-described embodiment can facilitate wiring by providing the first bus bar and the second bus bar.
Optionally, the first power board card, the second power board card and the load board card provided by the above embodiment are all disposed in the chassis. Optionally, the first power supply board card, the second power supply board card and the load board card are inserted into the bus of the chassis backplane through the pin socket connector, the first bus and the second bus are arranged on the chassis backplane, and the first bus and the second bus are connected with the corresponding pin socket connector. In the embodiment, two modules are arranged to perform voltage processing on the direct-current power supply twice, so that the area of the modules for processing the direct-current power supply can be effectively reduced compared with that of one voltage processing, and the direct-current power supply circuit provided by the embodiment is suitable for a small-size case.
In an alternative embodiment of the present application, the load element may be an electronic board card of the hvdc transmission control protection device and/or the valve control device. It should be noted that the first dc power supply module, the second dc power supply module, the third dc power supply module, and the fourth dc power supply module respectively include a voltage reduction unit, and the first dc voltage regulation module and the second dc voltage regulation module are voltage reduction modules. Optionally, the first dc power supply module, the second dc power supply module, the third dc power supply module, and the fourth dc power supply module may be configured to adjust the 220V dc power supply to a 48V dc power supply. Optionally, the first dc voltage regulating module and the second dc voltage regulating module may be configured to regulate the 48V dc power supply to the 12V dc power supply.
The dc power supply circuit provided in the above embodiment, including a first power supply board card, a second power supply board card and at least one load board card, the first power supply board card includes a first dc power module and a second dc power module, the second power supply board card includes a third dc power module and a fourth dc power module, the load board card includes a first dc voltage regulating module and a second dc voltage regulating module, when the first dc voltage regulating module is short-circuited (or the second dc voltage regulating module is short-circuited), although the power supply capacity of the first dc power module and the second dc power module (or the third dc power module and the fourth dc power module) connected thereto may be affected, the third dc power module and the fourth dc power module (or the first dc power module and the second dc power module) may still supply power to the load board card. When the first power supply board card fails (or the second power supply board card fails), the second power supply board card (or the first power supply board card) can also realize two-way power supply, and the direct-current power supply circuit also has redundancy, so that the power supply reliability is improved.
It can be understood that the power of the single-path design of the direct-current power supply circuit provided by the embodiment meets the power supply requirement required by the load board card.
With continued reference to fig. 1, the dc power supply circuit 100 may further include a third diode D1 and a fourth diode D2. Specifically, the positive electrode of the third diode D1 is electrically connected to the output terminal of the first dc power supply module 112, the negative electrode of the third diode D1 is electrically connected to the input terminal of the first dc voltage regulating module 132, the positive electrode of the fourth diode D2 is electrically connected to the output terminal of the second dc power supply module 114, and the negative electrode of the fourth diode D2 is electrically connected to the input terminal of the first dc voltage regulating module 132. This embodiment may be used to prevent power supply circulation between the first dc power supply module 112 and the second dc power supply module 114 by providing the third diode D1 and the fourth diode D2.
With continued reference to fig. 1, the dc power supply circuit 100 may further include a fifth diode D3 and a sixth diode D4. Specifically, the anode of the fifth diode D3 is electrically connected to the output terminal of the third dc power module 122, the cathode of the fifth diode D3 is electrically connected to the input terminal of the second dc voltage regulating module 134, the anode of the sixth diode D4 is electrically connected to the output terminal of the fourth dc power module 124, and the cathode of the sixth diode D4 is electrically connected to the input terminal of the second dc voltage regulating module 134. This embodiment may be used to prevent a power circulation between the third dc power supply module 122 and the fourth dc power supply module 124 by providing the fifth diode D3 and the sixth diode D4.
Please refer to fig. 2, which illustrates a schematic structural diagram of a first dc power module according to an embodiment of the present disclosure. As shown in fig. 2, the first dc power supply module 112 may include a first fuse 202 and a voltage regulating unit 204. Specifically, one end of the first fuse 202 is electrically connected to a first dc power supply, an input end of the voltage regulating unit 204 is electrically connected to the other end of the first fuse 202, and an output end of the voltage regulating unit 204 is electrically connected to an input end of the first dc voltage regulating module. Optionally, the voltage regulating unit 204 may be a voltage reducing unit or a voltage increasing unit. The first dc power supply module of the above embodiment is provided with the first fuse, which can prevent the circuit short circuit of the connection of the other end of the first fuse from affecting the first dc power supply, thereby ensuring that the first dc power supply can still normally supply power to the third dc power supply module even if the circuit short circuit of the connection of the other end of the first fuse, and further ensuring that the third dc power supply module can normally supply power to the load element, thereby improving the reliability of the dc power supply system.
With continued reference to fig. 2, the first dc power supply module may further include an energy storage unit 206. Specifically, the energy storage unit 206 includes an inductor L1, a capacitor C1, and a first diode D5. One end of the inductor L1 is electrically connected to the other end of the first fuse 202, the other end of the inductor L1 is electrically connected to one end of the capacitor C1, the other end of the capacitor C1 is grounded, the cathode of the first diode D5 is electrically connected to the other end of the first fuse 202, and the anode of the first diode D5 is electrically connected to the other end of the inductor L1. The energy storage unit 206 is provided in the above embodiment, and power can be supplied to the load element when the first dc power supply or the second dc power supply fails, so that the power supply reliability is improved.
With continued reference to fig. 2, the first dc power module may further include a first TVS transistor D6, a second TVS transistor D7, a third TVS transistor D8, an anti-reflection diode D9, an EMI filter circuit 208, and a capacitor C2. Specifically, the negative electrode of the first TVS tube D6 is electrically connected to the other end of the first fuse 202, and the positive electrode of the first TVS tube D6 is electrically connected to the negative electrode of the first dc power supply. The cathode of the second TVS tube D7 is electrically connected to the other end of the first fuse 202, and the anode of the second TVS tube D7 is grounded. The negative electrode of the third TVS transistor D8 is electrically connected to the negative electrode of the first dc power source, and the positive electrode of the third TVS transistor D8 is grounded. The cathode of the anti-reverse diode D9 is electrically connected to the other end of the first fuse 202, and the anode of the anti-reverse diode D9 is electrically connected to the cathode of the first dc power supply. One end of the EMI filter circuit 208 is electrically connected to the first fuse 202, and the other end of the EMI filter circuit 208 is electrically connected to the negative electrode of the first dc power supply. One end of the capacitor C2 is electrically connected to the other end of the first fuse 202, the other end of the capacitor C2 is electrically connected to the negative terminal of the first dc power supply, and the negative terminal of the first dc power supply is grounded. Optionally, the first power board card is inserted into the chassis backplane through the pin connector.
When the transient voltage exceeds the normal working voltage of the circuit, the first TVS tube D6 generates avalanche to provide a path for the transient current, so that the internal circuit is protected from breakdown of excess voltage or overheating and burning of excess current. The second TVS tube D7 and the third TVS tube D8 are reversely connected to the first power supply board card reference ground, and utilize the transient suppression characteristic of the TVS tubes to bypass harmful transient energy to the ground, so that the voltage is not higher than the input voltage of a single TVS tube, the circuit is clamped, and meanwhile, the clamping cost of the circuit is low by adopting the structure.
With continued reference to fig. 2, the first dc power supply module 112 may further include an input fault detection unit 210 and an output fault detection unit 212. Specifically, the input fault detection unit 210 is configured to detect an input voltage of the first dc power supply module 112, and output a first detection signal when the input voltage of the first dc power supply module 112 is abnormal, and the output fault detection unit 212 is configured to detect an output voltage of the first dc power supply module 112, and output a second detection signal when the output voltage of the first dc power supply module 112 is abnormal.
It should be noted that, when the input voltage of the first dc power supply module 112 is greater than the first threshold voltage, or is less than the second threshold voltage, the input voltage of the first dc power supply module 112 is considered to be abnormal. When the output voltage of the first dc power supply module 112 is greater than the third threshold voltage or less than the fourth threshold voltage, it is determined that the output voltage of the first dc power supply module 112 is abnormal. It can be understood that the second threshold voltage is smaller than the first threshold voltage, and the fourth threshold voltage is smaller than the third threshold voltage, and the first threshold voltage, the second threshold voltage, the third threshold voltage, and the fourth threshold voltage are not limited in this embodiment of the application and may be set according to actual needs.
Optionally, as shown in fig. 2, the first TVS tube D6, the anti-reflection diode D9, the EMI filter circuit 208, the energy storage unit 206, and the capacitor C2 are connected in sequence. Optionally, the output fault detection unit may detect a voltage output by the voltage regulation unit, that is, the voltage output by the voltage regulation unit is used as an output voltage of the first dc power supply module. Optionally, the input fault detection unit may detect a voltage at one end of the inductor L1 of the energy storage unit, that is, a voltage at one end of the inductor L1 is used as the input voltage of the first dc power supply module.
With continued reference to fig. 2, the first dc power module 112 may further include an or gate unit 214. Specifically, the or gate unit 214 is respectively connected to the input fault detection unit 210 and the output fault detection unit 212, and the or gate unit 214 is configured to output a fault signal when receiving the first detection signal and/or the second detection signal.
Optionally, the input fault detecting unit outputs a first detection signal under the condition that the input voltage is abnormal, the first detection signal is a high-level signal, the output fault detecting unit outputs a second detection signal under the condition that the output voltage is abnormal, the second detection signal is a high-level signal, and the or gate unit outputs the fault signal when the or gate unit receives the first detection signal and/or the second detection signal. Optionally, the dc power supply circuit includes two sets of first power boards, which are the main first power board and the auxiliary first power board, respectively. It can be understood that the main first power supply board card and the auxiliary first power supply board card have the same structure. Optionally, the or gate unit is connected to a controller, and the controller may be configured to switch different first power boards when receiving a fault signal output by the or gate unit. If the fault signal indicates that the main first power supply board card has a fault, the controller switches the auxiliary first power supply board card to supply power to the load board card, and therefore the reliability of power supply is improved.
With continued reference to fig. 2, the first direct current power supply module 112 may further include an input indication unit 216 and an output indication unit 218. Specifically, the input instruction unit 216 is connected to the input fault detection unit 210, and the input instruction unit 216 instructs when the input voltage of the first dc power supply module 112 is abnormal. The output instruction unit 218 is connected to the output fault detection unit 212, and the output instruction unit 218 is configured to instruct when the output voltage of the first dc power supply module 112 is abnormal. The input indicating unit and the output indicating unit of the embodiment can realize fault location, and a worker can know a fault point according to the indicating states of the input indicating unit and the output indicating unit.
Optionally, the input indication unit may include an indicator light and/or an alarm. Optionally, the output indication unit may include an indicator light and/or an alarm. Optionally, the input indicating unit is an indicator light, and is lit up to indicate when the input voltage of the first direct-current power supply module is abnormal. Optionally, the output indication unit is an indicator light, and is lit up to indicate when the output voltage of the first direct current power supply module is abnormal.
Optionally, the second dc power supply module may include a first fuse and a voltage regulating unit. Optionally, the second dc module may include an energy storage unit. Optionally, the second dc power supply module may further include a first TVS transistor, a second TVS transistor, a third TVS transistor, an anti-reverse diode, an EMI filter circuit, and a capacitor. Optionally, the second dc power supply module may further include an input fault detection unit and an output fault detection unit. Optionally, the second dc power supply module may further include an or gate unit. The first direct current power supply module may further include an input indication unit and an output indication unit.
Optionally, the third dc power supply module may include a first fuse and a voltage regulating unit. Optionally, the third dc module may include an energy storage unit. Optionally, the third dc power supply module may further include a first TVS transistor, a second TVS transistor, a third TVS transistor, an anti-reverse diode, an EMI filter circuit, and a capacitor. Optionally, the third dc power supply module may further include an input fault detection unit and an output fault detection unit. Optionally, the third dc power supply module may further include an or gate unit. The third dc power supply module may further include an input indication unit and an output indication unit.
Optionally, the fourth dc power supply module may include a first fuse and a voltage regulating unit. Optionally, the fourth dc module may include an energy storage unit. Optionally, the fourth dc power supply module may further include a first TVS transistor, a second TVS transistor, a third TVS transistor, an anti-reverse diode, an EMI filter circuit, and a capacitor. Optionally, the fourth dc power supply module may further include an input fault detection unit and an output fault detection unit. Optionally, the fourth dc power supply module may further include an or gate unit. The fourth dc power supply module may further include an input indication unit and an output indication unit.
It should be noted that, the connection relationship and description of the first fuse, the voltage regulating unit, the energy storage unit, the first TVS tube, the second TVS tube, the third TVS tube, the anti-reverse diode, the EMI filter circuit, the capacitor, the input fault detection unit, the output fault detection unit, the or gate unit, the input indication unit, and the output indication unit are detailed in the above embodiments, and are not repeated herein.
It can be understood that the second dc power module, the third dc power module, and the fourth dc power module can all adopt the structure of the first dc power module provided in the above embodiments, and are not described herein again.
Please refer to fig. 3, which illustrates a schematic structural diagram of a load board card according to an embodiment of the present application. As shown in fig. 3, the load board 130 may include a first dc voltage regulation module 132, a second dc voltage regulation module 134, and a second fuse 302. Specifically, one end of the second fuse 302 is electrically connected to the output end of the first dc power supply module and the output end of the second dc power supply module, and the other end of the second fuse 302 is electrically connected to the input end of the first dc voltage regulating module 132. The descriptions of the first dc voltage regulation module 132 and the second dc voltage regulation module 134 refer to the above embodiments, and are not repeated herein.
The above-described embodiment can be used as short-circuit protection by providing the second fuse, preventing a short circuit of a circuit connected to the other end of the second fuse from affecting a circuit connected to one end of the second fuse.
With continued reference to fig. 3, the load board 130 may further include a third fuse 304. Specifically, one end of the third fuse 304 is electrically connected to the output end of the third dc power supply module and the output end of the fourth dc power supply module, and the other end of the third fuse 304 is electrically connected to the input end of the second dc voltage regulating module 134.
The above-described embodiment can be used as short-circuit protection by providing the third fuse, preventing a short circuit of a circuit connected to the other end of the third fuse from affecting a circuit connected to one end of the third fuse.
With continued reference to fig. 3, the load board 130 may further include a second diode D10. Specifically, the positive electrode of the second diode D10 is electrically connected to the output terminal of the first dc voltage regulation module 132, and the negative electrode of the second diode D10 is electrically connected to the load element 136. With continued reference to fig. 3, the load board may also include a seventh diode D11. Specifically, the positive electrode of the seventh diode D11 is electrically connected to the output terminal of the second dc voltage regulation module 134, and the negative electrode of the seventh diode D11 is electrically connected to the load element 136. This embodiment can be used to prevent a power supply circulation between the first dc voltage regulating module 132 and the second dc voltage regulating module 134 by providing the second diode D10 and the seventh diode D11.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A dc power supply circuit, comprising:
the first power supply board card comprises a first direct-current power supply module and a second direct-current power supply module, wherein the input end of the first direct-current power supply module is used for being connected with a first direct-current power supply, and the input end of the second direct-current power supply module is used for being connected with a second direct-current power supply;
the second power supply board card comprises a third direct-current power supply module and a fourth direct-current power supply module, wherein the input end of the third direct-current power supply module is used for being connected with a first direct-current power supply, and the input end of the fourth direct-current power supply module is used for being connected with a second direct-current power supply;
the load board card comprises a first direct current voltage regulating module and a second direct current voltage regulating module, the input end of the first direct current voltage regulating module is electrically connected with the output end of the first direct current power supply module and the output end of the second direct current power supply module, the output end of the first direct current voltage regulating module is used for being electrically connected with a load element, the input end of the second direct current voltage regulating module is electrically connected with the output end of the third direct current power supply module and the output end of the fourth direct current power supply module, and the output end of the second direct current voltage regulating module is used for being electrically connected with the load element;
wherein the first direct current power supply module includes:
the input fault detection unit is used for detecting the input voltage of the first direct current power supply module and outputting a first detection signal when the input voltage of the first direct current power supply module is abnormal;
the output fault detection unit is used for detecting the output voltage of the first direct-current power supply module and outputting a second detection signal when the output voltage of the first direct-current power supply module is abnormal;
the first direct current power supply module further comprises an or gate unit, the or gate unit is respectively connected with the input fault detection unit and the output fault detection unit, and is used for outputting a fault signal under the condition of receiving the first detection signal and/or the second detection signal;
the direct-current power supply circuit further comprises a controller and an auxiliary first power supply board card, the controller is connected with the OR gate unit, and the controller is used for switching the first power supply board card into the auxiliary first power supply board card when receiving a fault signal output by the OR gate unit;
wherein, the first direct current power supply module further comprises a first fuse wire, a first TVS tube, a second TVS tube, a third TVS tube, an anti-reverse diode, an EMI filter circuit and a capacitor C2, one end of the first fuse wire is used for electrically connecting the anode of the first direct current power supply, the cathode of the first TVS tube is electrically connected with the other end of the first fuse wire, the anode of the first TVS tube is electrically connected with the cathode of the first direct current power supply, the cathode of the second TVS tube is electrically connected with the other end of the first fuse wire, the anode of the second TVS tube is grounded, the cathode of the third TVS tube is electrically connected with the cathode of the first direct current power supply, the anode of the third TVS tube is grounded, the cathode of the anti-reverse diode is electrically connected with the other end of the first fuse wire, the anode of the anti-reverse diode is electrically connected with the cathode of the first direct current power supply, one end of the EMI filter circuit is electrically connected with the other end of the first fuse wire, the other end of the EMI filter circuit is electrically connected with the negative electrode of the first direct current power supply, one end of the capacitor C2 is electrically connected with the other end of the first fuse, the other end of the capacitor C2 is electrically connected with the negative electrode of the first direct current power supply, and the negative electrode of the first direct current power supply is grounded.
2. The dc power supply circuit of claim 1, wherein the first dc power supply module further comprises:
the input indicating unit is connected with the input fault detection unit and used for indicating when the input voltage of the first direct current power supply module is abnormal;
and the output indicating unit is connected with the output fault detection unit and used for indicating when the output voltage of the first direct current power supply module is abnormal.
3. The direct current supply circuit according to claim 2, wherein the input indication unit comprises an indicator light and/or the output indication unit comprises an indicator light.
4. The dc power supply circuit of claim 1, wherein the first dc power supply module comprises:
one end of the first fuse is used for being electrically connected with the first direct current power supply;
and the input end of the voltage regulating unit is electrically connected with the other end of the first fuse, and the output end of the voltage regulating unit is electrically connected with the input end of the first direct current voltage regulating module.
5. The DC power supply circuit of claim 4, wherein the first DC power supply module further comprises an energy storage unit, the energy storage unit comprises an inductor, a capacitor C1 and a first diode, one end of the inductor is electrically connected to the other end of the first fuse, the other end of the inductor is electrically connected to one end of the capacitor C1, the other end of the capacitor C1 is grounded, the cathode of the first diode is electrically connected to the other end of the first fuse, and the anode of the first diode is electrically connected to the other end of the inductor.
6. The DC power supply circuit of claim 1, wherein the load board further comprises a second fuse, one end of the second fuse is electrically connected to the output terminal of the first DC power supply module and the output terminal of the second DC power supply module, and the other end of the second fuse is electrically connected to the input terminal of the first DC voltage regulating module.
7. The DC power supply circuit of claim 1, wherein the load board further comprises a second diode, a positive electrode of the second diode is electrically connected to the output end of the first DC voltage regulating module, and a negative electrode of the second diode is electrically connected to the load element.
8. The dc supply circuit of claim 1, further comprising:
the anode of the third diode is electrically connected with the output end of the first direct-current power supply module, and the cathode of the third diode is electrically connected with the input end of the first direct-current voltage regulating module;
and the anode of the fourth diode is electrically connected with the output end of the second direct-current power supply module, and the cathode of the fourth diode is electrically connected with the input end of the first direct-current voltage regulating module.
9. The dc supply circuit of claim 1, wherein the dc supply circuit comprises a first bus bar and a second bus bar; the first bus is respectively connected with the output end of the first direct-current power supply module, the output end of the second direct-current power supply module and the input end of the first direct-current voltage regulating module; the second bus is respectively connected with the output end of the third direct-current power supply module, the output end of the fourth direct-current power supply module and the input end of the second direct-current voltage regulating module.
10. The dc supply circuit of claim 1, further comprising:
the anode of the fifth diode is electrically connected with the output end of the third direct current power supply module, and the cathode of the fifth diode is electrically connected with the input end of the second direct current voltage regulating module;
and the anode of the sixth diode is electrically connected with the output end of the fourth direct-current power supply module, and the cathode of the sixth diode is electrically connected with the input end of the second direct-current voltage regulating module.
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| CN202110865529.XA CN113315110B (en) | 2021-07-29 | 2021-07-29 | DC power supply circuit |
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| CN202110865529.XA CN113315110B (en) | 2021-07-29 | 2021-07-29 | DC power supply circuit |
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| CN102075004B (en) * | 2011-01-17 | 2013-05-08 | 中兴通讯股份有限公司 | Battery protection device and method of direct-current (DC) power supply |
| CN104037929B (en) * | 2013-03-06 | 2017-06-27 | 华为技术有限公司 | A kind of method of supplying power to and device |
| CN205355948U (en) * | 2016-01-18 | 2016-06-29 | 国家电网公司 | Valve accuse unit electrical power generating system of HVDC system |
| CN107612368A (en) * | 2017-11-03 | 2018-01-19 | 北京聚智达科技有限公司 | Failure safe power supply |
| CN208078917U (en) * | 2018-05-04 | 2018-11-09 | 广源动力（武汉）科技股份有限公司 | A kind of high-voltage power device |
| CN110912176A (en) * | 2019-12-09 | 2020-03-24 | 中国南方电网有限责任公司超高压输电公司 | High-reliability power supply method for converter valve controller |
| CN211830570U (en) * | 2020-04-03 | 2020-10-30 | 卧龙电气集团辽宁荣信电气传动有限公司 | Double-circuit power supply device based on frequency converter drive plate |
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