CN202443070U - Grounding resistance test locating system - Google Patents

Abstract

The utility model discloses a grounding resistance test locating system, which comprises three client devices and a server terminal device, wherein one client device is fixedly arranged on a grounding device to be tested, two of the three client devices are used as a measurement voltage electrode and a measurement current electrode, the distance and the angle of a corresponding client device are calculated by the server terminal device according to the position information of the client device, and the client devices which are used as the measurement voltage electrode and the measurement current electrode are adjusted in position according to the acquired distance and angle. By utilizing the data communication between the client devices and the server terminal device, adjustment can be performed by a tester according to the position, distance and angle information acquired by the client devices, so that the reduction of the accuracy and the reliability of the final test data caused by the deviation of the paying-off angle can be avoided.

Description

The earth resistance positioning system

Technical field

The utility model relates to a kind of positioning system, the positioning system when especially carrying out power frequency earth loop impedance test unwrapping wire.

Background technology

Along with quickening of urbanization process; Housing density around the electric substation is increasing; Especially be located in the electric substation in urban district and often have only the separated of a wall with residential block on every side; This causes in carrying out the unwrapping wire process of earth resistance, tending to run into blocking of buildings, like enclosure wall, residential building etc.Owing to lack corresponding locating device, behind the cut-through thing, can't accurately revise the angle of unwrapping wire, certain deviation can take place in the unwrapping wire angle, thereby influences the accuracy and the reliability of final test data.If the Resistance of Grounding Grids test result is inaccurate, cause defective to fail in time to find, then can hide some dangers for for the safe and stable operation of electric substation.

Summary of the invention

The utility model problem to be solved just provides a kind of earth resistance positioning system, and the tester can adjust the position according to real-time distance, angle information, reaches the effect of accurate location.

For solving the problems of the technologies described above, the test philosophy of power frequency impedance ground three electrode method need be described at first: with reference to accompanying drawing 1,2, among the figure: G is tested earthing device; P is measuring voltage pole; The measuring electric current utmost point of C; A is a reometer; V is a voltage table; D is the maximum diagonal length of tested earthing device.

The power frequency impedance ground value ZG of tested earthing device is determined by following formula:

$Z_G=\frac{U_{\mathrm{GP}}}{I}/[1-a(\frac{1}{D_{\mathrm{GC}}}+\frac{1}{D_{\mathrm{GP}}}-\frac{1}{\sqrt{D_{\mathrm{GP}}^2+D_{\mathrm{GC}}^2-2D_{\mathrm{GP}}{D}_{\mathrm{GC}}\cos \mathrm{\θ}}})]$

In the formula: UGP is the voltage between voltage pole and the tested earthing device;

I is for passing through the measuring current in the earthing device inflow place;

A is tested earthing device equivalent sphere radius;

DGP is the distance that voltage pole leaves the equivalent center of tested earthing device;

DGC is the distance of the electric current utmost point from the equivalent center of tested earthing device;

θ is the angle between the connecting line at connecting line and electric current utmost point C and the equivalent center of tested earthing device G at voltage pole P and tested earthing device G equivalence center.

Wherein: DGP=DGC >=3D, 30 ° of θ ≈.

Through above-mentioned explanation; The utility model adopts following technical scheme: the earth resistance positioning system; Comprise three client devices and server terminal device; Wherein a client device is fixed in tested earthing device; Wherein two client devices are used the electric current utmost point as measuring with voltage pole and measurement, and said server terminal device is carried out position adjustment as measuring with voltage pole and the client device of measuring with the electric current utmost point according to the distance and the angle of acquisition according to the distance and the angle of the corresponding client device of positional information calculation of client device.

Further, said client device utilizes satellite to obtain GPS longitude and latitude positional information.

Further, said client device is a windows mobile handheld device.

Further, said client device has filming apparatus.

The beneficial effect of the utility model: the utility model utilizes the data communication between client device and the server terminal device; The tester adjusts through position, distance, angle information that client device obtained, the final test data accuracy of having avoided causing because of unwrapping wire angle generation deviation and the decline of reliability.

Description of drawings

Below in conjunction with accompanying drawing the utility model is done further explanation:

Fig. 1 is the power frequency earthing resistance triangular-shaped electrodes arrangenent diagram of tested earthing device;

Fig. 2 is the three electrode method key wiring diagram;

Fig. 3 is the system construction drawing of the utility model.

Embodiment

With reference to Fig. 3, the earth resistance positioning system comprises

Three client devices: equipment G, equipment C, equipment P,

Server terminal device: equipment S;

Equipment G is fixed in tested earthing device, and equipment C uses the electric current utmost point for measuring, and equipment P uses voltage pole for measuring; Three client devices utilize satellite to obtain GPS longitude and latitude positional information; Positional information on synchronous three client devices of server terminal device is calculated the distance and the angle of three client devices simultaneously, and according to the three electrode method principle: said distance is the distance between client device and the server terminal device; Be the distance of equipment P from the equivalent center of equipment G; Equipment C is from the distance at the equivalent center of equipment G, the angle between the connecting line that the angle ranging from equipment P and equipment G equivalence center and the connecting line at equipment C and the equivalent center of equipment G, and the tester then adjusts through position, distance, angle information that client device obtained; Press the three electrode method measuring principle and arrange, reach the effect of accurate location.

Client device adopts windows mobile handheld device, is convenient for carrying, and has filming apparatus, after accomplishing the location, can take photo and uploads, and sets up a locating information database, as the reference of test job from now on.

More than given embodiment be merely preferable embodiment, be the characteristics of clearer explanation the utility model only; The personage who is familiar with this skill should be understood that the utility model includes but not limited to the content of describing in accompanying drawing and the top embodiment.Anyly do not depart from the function of the utility model and the modification of structural principle all will be included in the scope of claims.

Claims (4)

1. earth resistance positioning system; It is characterized in that: comprise three client devices and server terminal device; Wherein a client device is fixed in tested earthing device; Wherein two client devices are used the electric current utmost point as measuring with voltage pole and measurement; Said server terminal device is carried out position adjustment as measuring with voltage pole and the client device of measuring with the electric current utmost point according to distance that obtains and angle according to the distance and the angle of the corresponding client device of positional information calculation of client device.

2. earth resistance positioning system according to claim 1 is characterized in that: said client device utilizes satellite to obtain GPS longitude and latitude positional information.

3. earth resistance positioning system according to claim 1 is characterized in that: said client device is a windows mobile handheld device.

4. earth resistance positioning system according to claim 1 is characterized in that: said client device has filming apparatus.

Images