Dynamic reactive power compensation device control strategy verification system

Abstract

The invention discloses a dynamic reactive power compensation device control strategy verification system. The system comprises a main circuit simulation module, a new energy resource power station and power grid simulation module, an optical fiber conversion interface, a level conversion interface and a human-machine interaction interface. Various complicated power grid operation conditions are simulated by the dynamic reactive power compensation device control strategy verification system, and the feedback signal of a device link system can be given out according to requirements, so that thewiring debugging is simple and convenient; various control strategies of a dynamic reactive power compensation device can be verified, and offline optimization can be carried out on the control performance of the dynamic reactive power compensation device, so that the debugging and departure period before field operation is greatly shortened, offline verification and offline parameter optimization of the control strategies of the dynamic reactive power compensation device are realized, and the problem that operation performance optimization is needed for a part of new energy resource power stations in which the dynamic reactive power compensation device is put into operation but parameter online optimization cannot be carried out because of the restricted condition of site operation is solved.

Description

technical field [0001] The invention belongs to the field of new energy access and control, and provides a control strategy verification system for a dynamic reactive power compensation device. Background technique [0002] my country's wind farms / photovoltaic power plants mostly adopt the development model of "large-scale centralized development, high-voltage long-distance transmission". increasingly prominent. The reactive power compensation device can improve the dynamic support capacity of wind power / photovoltaic power, and is beneficial to the fault recovery of the power grid. However, from the actual operation situation, there are many problems in the control performance of the dynamic reactive power compensation device of the new energy power station, especially the imperfect basic control strategy, lack of low voltage ride through and abnormal situation blocking control strategy, which seriously affects the safe and stable operation of the power grid. The analysis o...

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Problems solved by technology

Judging from the network-related performance tests of dynamic reactive power compensation devices that have been carried out, most of the dynamic reactive power compensation devices have imperfect / missing control strategies, or the control effect corresponding to the actual parameter setting value cannot achieve the expected effect, which is urgently needed A fast, economical and effective method to verify the correctness of its control strategy and the rationality of parameter setting values

[0005] The existing methods for verifying the correctness of the control strategy have the following deficiencies: 1. There are many operating components involved in the field test, the test conditions are complicated, and there are many influencing factors, resulting in a long cycle for finding and solving problems; 2. The same There are large differences in the test results of the model dynamic reactive power compensation device; 3. Different field technicians debug the same type of dynamic reactive power compensation device, which may cause large differences in test results due to lack of control strategies or differences in parameter setting values. The cause of the problem It is often difficult to find; 4. The power factor control capability of the dynamic reactive power compensation device (that is, the comprehensive control of voltage and reactive power) is restricted by many factors such as the grid environment, which greatly prolongs the test cycle or cannot be tested on site

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