A calculation method of avc adjustment sensitivity based on ems historical data

Abstract

The invention provides an AVC adjustment sensitivity calculating method based on EMS historical data. The AVC adjustment sensitivity calculating method can overcome the problem that normal use of an AVC function is affected due to deviation between an AVC adjustment sensitivity parameter of a system and the reality, since the AVC adjustment sensitivity parameter is not verified for a long time, such that the system maintenance personnel cannot perceive the adjustment sensitivity change caused by changes of a power grid operating mode or a field operating environment during operation of the AVCsystem at present. According to the AVC adjustment sensitivity calculating method, the statistically significant AVC adjustment sensitivity data can be used for verifying and correcting the AVC adjustment sensitivity parameter in the existing system, thereby realizing more precise control of voltage reactive power of the AVC system.

Description

technical field [0001] The present invention relates to the field of grid voltage and reactive power control parameter analysis methods, and more specifically, relates to an AVC adjustment sensitivity calculation method based on EMS historical data. Background technique [0002] At present, AVC (automatic voltage control) technology has been popularized and applied in all 220kV and below substations of prefectural and municipal bureaus. The AVC application can collect real-time voltage and reactive power data through the main station SCADA, and consider the influence caused by the adjustment between regional power grids. The advanced voltage and reactive power control strategy avoids the possible impact on the voltage and reactive power adjustment equipment of the entire system caused by the VQC operation in the station in the past, and achieves high quality voltage and minimum network loss in the entire area. [0003] For the power system of prefectural and municipal bureau...

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Problems solved by technology

[0006] 2. The sensitivity of the reactive power change on the high voltage side of the main transformer caused by the adjustment of the gear position, that is, the amount of reactive power change on the high voltage side of the main transformer caused by raising or lowering a transformer tap

[0008] 1. The traditional sensitivity matrix calculation method can only calculate the AVC regulation sensitivity of a specific load condition under a specific power grid operation mode. For the actual power grid operation, the 10kV feeder load is constantly changing. Obviously, the theoretical method is no longer applicable to the calculation of AVC regulation sensitivity

[0009] 2. At present, after the AVC adjustment sensitivity parameters are manually formulated before the substation is put into operation, it is rarely checked and modified after the substation is put into operation. The system maintenance personnel have no way to change the adjustment sensitivity due to changes in the grid load or on-site operating environment. Perception, causing the system AVC adjustment sensitivity parameters to deviate from the actual ones, affecting the normal operation of the AVC function

[0010] Based on the above problems, the AVC adjustment sensitivity parameters set in the current system cannot be obtained through calculation or other methods, and the accuracy of the AVC adjustment sensitivity parameter setting cannot be evaluated, and the stable operation of the AVC application cannot be guaranteed.

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