Dynamic reactive power compensation control method

Abstract

The invention relates to a dynamic reactive power compensation control method, and the method is characterized in that a static dynamic reactive power compensation device is incorporated into a power distribution network, then the system voltage, load current and current signal of a thyristor-controlled separable-type electric reactor on an access point of the static dynamic reactive power compensation device are monitored in real time, a susceptance value to be compensated of each phase of the static dynamic reactive power compensation device is calculated in real time, so that a trigger angle of a thyristor in the thyristor-controlled separable-type electric reactor and on-off of a thyristor in a parallel thyristor switched capacitor can be controlled. The method has the remarkable characteristics that the dynamic response time of the static dynamic reactive power compensation device is guaranteed by utilizing the open-loop control, and the steady accuracy of the entire device is guaranteed by utilizing the closed-loop control, so that the dynamic response time and the steady accuracy of the static dynamic reactive power compensation device can be guaranteed. The method can be applied to the field with rapid and frequent load change and has a good application prospect.

Description

Technical field [0001] The invention relates to a dynamic reactive power compensation control method. Background technique [0002] With the continuous growth of my country’s economy, the power load has increased rapidly, and the reactive power demand of users has also increased significantly. This has brought more serious problems to the power grid in my country, which is already lacking. Therefore, the role of static dynamic reactive power compensation devices is Appears increasingly prominent. [0003] The main objectives of the industrial static dynamic reactive power compensation device (Static Var Compensator, hereinafter referred to as SVC) mainly include three aspects: suppress the voltage fluctuation and flicker caused by the interference load change; compensate the reactive current required by the load, and improve the power factor ; Compensate the imbalance between active and reactive loads. The response time of the industrial SVC device largely determines its compensat...

AI Technical Summary

Problems solved by technology

[0005] These load compensation algorithms have their own characteristics and have their own application fields, but they all belong to open-loop control, or called feed-forward control, and it is difficult to guarantee the accuracy of dynamic reactive power compensation in practical applications.

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