CN108054787B - Method for determining AGC (automatic gain control) regulation rate requirement of wind power system - Google Patents

Method for determining AGC (automatic gain control) regulation rate requirement of wind power system Download PDF

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CN108054787B
CN108054787B CN201711281311.XA CN201711281311A CN108054787B CN 108054787 B CN108054787 B CN 108054787B CN 201711281311 A CN201711281311 A CN 201711281311A CN 108054787 B CN108054787 B CN 108054787B
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wind power
agc
power system
data sequence
component data
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CN108054787A (en
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王魁
李媛媛
闫大威
周进
雷铮
崔广胜
罗涛
宣文博
丁承第
宋佳
王学军
李慧
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State Grid Corp of China SGCC
State Grid Tianjin Electric Power Co Ltd
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State Grid Tianjin Electric Power Co Ltd
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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
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
    • H02J3/386—
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/76—Power conversion electric or electronic aspects

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Abstract

A method for determining AGC adjusting speed requirements of a wind power system. Which comprises thatA wind power plant operation department acquires a wind power historical data sequence and acquires a load historical data sequence from a load management system; calculating a comprehensive component data sequence; smoothing the comprehensive component data sequence by using a rolling average method to obtain the comprehensive component data smoothed at the m moment
Figure DDA0001497467910000011
Determining the AGC regulation rate requirement required at the moment m by calculating the difference value of the adjacent smoothed comprehensive component data; and selecting the maximum value of the AGC adjusting rate required at the moment m as the AGC adjusting rate requirement of the whole wind power system, and the like. The method comprehensively considers factors such as load fluctuation and wind power fluctuation, utilizes a rolling average method to obtain comprehensive component data after the load and the wind power are superposed, accurately determines the AGC regulation rate requirement of the wind power system by calculating the difference value of the adjacent comprehensive component data, and provides guidance and reference for the actual operation of the power system.

Description

Method for determining AGC (automatic gain control) regulation rate requirement of wind power system
Technical Field
The invention belongs to the technical field of power grid dispatching and operation, and particularly relates to a method for determining AGC (automatic gain control) regulation rate requirements of a wind power system.
Background
The safe and stable operation of the power system requires that the system frequency is always maintained within a rated range, random load fluctuation can affect the change of the system frequency at any time, and in the traditional power system, the system frequency is maintained only through the balance of power generation and load. However, with the grid connection of large-scale wind power, the power supply side also becomes a fluctuation source, which brings adverse effects to the maintenance of the frequency of the power system. At the moment, the frequency change of the power system is caused by the comprehensive fluctuation of the load and the wind power, so the rate of the comprehensive fluctuation of the load and the wind power needs to be evaluated to determine the demand of Automatic Generation Control (AGC) in the wind power system, ensure that the output of a thermal power unit can be quickly adjusted, and respond to the fluctuation change of the wind power and the load to maintain the stability of the frequency of the power system. However, no universal method exists at present, the requirement of the AGC regulation rate of the wind power system is determined, and the instruction and reference for the operation of the actual power system are lacked.
Disclosure of Invention
In order to solve the above problems, the present invention provides a method for determining an AGC regulation rate requirement of a wind power system.
In order to achieve the above purpose, the method for determining the AGC regulation rate requirement of the wind power system provided by the invention comprises the following steps executed in sequence:
step 1): acquiring a wind power historical data sequence of a certain day at intervals of 15 seconds from a wind power plant operation department
Figure BDA0001497467890000011
Acquiring a load history data sequence of a certain day at intervals of 15 seconds from a load management system
Figure BDA0001497467890000012
Step 2): according to the wind power historical data sequence and the load historical data sequence, calculating a comprehensive component data sequence, wherein the formula is as follows:
Figure BDA0001497467890000021
step 3): setting a counter m to be 30;
step 4): smoothing the comprehensive component data sequence obtained in the step 2) by using a rolling average method to obtain the comprehensive component data smoothed at the moment m
Figure BDA0001497467890000022
Namely, it is
Figure BDA0001497467890000023
Step 5): judging whether the counter m is equal to 30, if the counter m is equal to 30, directly entering the step 7), and if not, entering the step 6);
step 6): determining the AGC regulation speed requirement needed at the m moment by calculating the difference value of the adjacent smoothed comprehensive component data
Figure BDA0001497467890000024
If it is
Figure BDA0001497467890000025
Then
Figure BDA0001497467890000026
Otherwise
Figure BDA0001497467890000027
AGC adjustment rate requirement due to m time
Figure BDA0001497467890000028
Is necessarily greater than 0, and therefore
Figure BDA0001497467890000029
Is equal to
Figure BDA00014974678900000210
Absolute value of (d);
step 7): making m equal to m +1, judging whether the counter m is larger than 5730, if the counter m is larger than 5730, entering step 8), otherwise, entering step 4);
step 8): according to the calculated required AGC speed regulation requirement at m moments
Figure BDA00014974678900000211
Selecting the maximum value from the wind power system as the AGC regulation speed requirement of the whole wind power system
Figure BDA00014974678900000212
Compared with the prior art, the method for determining the AGC regulation rate requirement of the wind power system has the beneficial effects that: the method comprehensively considers factors such as load fluctuation and wind power fluctuation, utilizes a rolling average method to obtain comprehensive component data after the load and the wind power are superposed, accurately determines the AGC regulation rate requirement of the wind power system by calculating the difference value of the adjacent comprehensive component data, and provides guidance and reference for the actual operation of the power system.
Drawings
Fig. 1 is a flowchart of a method for determining an AGC regulation rate requirement of a wind power system according to the present invention.
Detailed Description
The method for determining the AGC regulation rate requirement of the wind power system according to the present invention is described in detail with reference to the accompanying drawings and the specific embodiments.
As shown in fig. 1, the method for determining the AGC regulation rate requirement of the wind power system according to the present invention includes the following steps performed in sequence:
step 1): acquiring a wind power historical data sequence of a certain day at intervals of 15 seconds from a wind power plant operation department
Figure BDA0001497467890000031
Slave load managementAcquiring a certain day load historical data sequence with 15 second intervals in the system
Figure BDA00014974678900000314
The wind power historical data sequence and the load historical data sequence are both separated by 15 seconds and have a period of 1 day, so that the wind power historical data sequence and the load historical data sequence both have 5760 data.
Step 2): according to the wind power historical data sequence and the load historical data sequence, calculating a comprehensive component data sequence, wherein the formula is as follows:
Figure BDA0001497467890000032
step 3): setting a counter m to be 30;
step 4): smoothing the comprehensive component data sequence obtained in the step 2) by using a rolling average method to obtain the comprehensive component data smoothed at the moment m
Figure BDA0001497467890000033
Namely, it is
Figure BDA0001497467890000034
The rolling average method is to roll and average the previous and the next sections of numerical values of the comprehensive component data, thereby obtaining a smoothed comprehensive component data sequence. It should be noted that the integrated component data after smoothing at m-time is calculated
Figure BDA0001497467890000035
When needed to utilize
Figure BDA0001497467890000036
These data, therefore, m has a minimum value of 30 and a maximum value of 5730.
Step 5): judging whether the counter m is equal to 30, if the counter m is equal to 30, directly entering the step 7), and if not, entering the step 6);
step 6): determining the AGC regulation speed requirement needed at the m moment by calculating the difference value of the adjacent smoothed comprehensive component data
Figure BDA0001497467890000037
If it is
Figure BDA0001497467890000038
Then
Figure BDA0001497467890000039
Otherwise
Figure BDA00014974678900000310
AGC adjustment rate requirement due to m time
Figure BDA00014974678900000311
Is necessarily greater than 0, and therefore
Figure BDA00014974678900000312
Is equal to
Figure BDA00014974678900000313
Absolute value of (d);
step 7): making m equal to m +1, judging whether the counter m is larger than 5730, if the counter m is larger than 5730, entering step 8), otherwise, entering step 4);
step 8): according to the calculated required AGC speed regulation requirement at m moments
Figure BDA0001497467890000041
Selecting the maximum value from the wind power system as the AGC regulation speed requirement of the whole wind power system
Figure BDA0001497467890000042

Claims (1)

1. A method for determining AGC (automatic gain control) regulation rate requirements of a wind power system is characterized by comprising the following steps: the method for determining the AGC regulation speed requirement of the wind power system comprises the following steps of sequentially executing:
step 1): acquiring a wind power historical data sequence of a certain day at intervals of 15 seconds from a wind power plant operation department
Figure FDA0002722367140000011
Wherein t is 1,2, …,5760, acquiring a load history data sequence of a certain day at intervals of 15 seconds from a load management system
Figure FDA0002722367140000012
Wherein t is 1,2, …, 5760;
step 2): according to the wind power historical data sequence and the load historical data sequence, calculating a comprehensive component data sequence, wherein the formula is as follows:
Figure FDA0002722367140000013
wherein t is 1,2, …, 5760;
step 3): setting a counter m to be 30;
step 4): smoothing the comprehensive component data sequence obtained in the step 2) by using a rolling average method to obtain the comprehensive component data smoothed at the moment m
Figure FDA0002722367140000014
Namely, it is
Figure FDA0002722367140000015
Step 5): judging whether the counter m is equal to 30, if the counter m is equal to 30, directly entering the step 7), and if not, entering the step 6);
step 6): determining the AGC regulation speed requirement needed at the m moment by calculating the difference value of the adjacent smoothed comprehensive component data
Figure FDA0002722367140000016
If it is
Figure FDA0002722367140000017
Then
Figure FDA0002722367140000018
Otherwise
Figure FDA0002722367140000019
AGC adjustment rate requirement due to m time
Figure FDA00027223671400000110
Is necessarily greater than 0, and therefore
Figure FDA00027223671400000111
Is equal to
Figure FDA00027223671400000112
Absolute value of (d);
step 7): making m equal to m +1, judging whether the counter m is larger than 5730, if the counter m is larger than 5730, entering step 8), otherwise, entering step 4);
step 8): according to the calculated required AGC speed regulation requirement at m moments
Figure FDA00027223671400000113
Selecting the maximum value from the wind power system as the AGC regulation speed requirement of the whole wind power system
Figure FDA00027223671400000114
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