Method for setting up reactive power compensation device model based on controlled alternating current source

Abstract

The invention provides a method for setting up a reactive power compensation device model based on a controlled alternating current source. The method includes the following steps of measuring the voltage of an installation point of a reactive power compensation device and the voltage of a control point of the reactive power compensation device, calculating control voltage deviation, setting up the reactive power compensation device model, and conducting calculating to obtain an amplitude signal, a frequency signal and a phase angle signal of the controlled alternating current source. According to the method, by using the controlled alternating current source and a grid interface, by controlling the amplitude, the phase angle and the frequency of the current of the controlled alternating current source and particularly by keeping the phase angle of the current of the installation point 90 electrical degrees greater than the phase angle of the alternating current source, the ideal control of the output power of the reactive power compensation device is achieved. The method can be easily and extensively applied to various power generation systems which include wind turbine generators, photovoltaic power generating systems, battery energy storage systems, ocean power generating systems, micro gas turbines and the like and are connected with a power grid through power electronic equipment interfaces, and can be easily and extensively applied to novel power electronic interface new energy power generating systems which are rapidly developing and constantly emerging.

Description

technical field [0001] The invention belongs to the technical field of power systems, and in particular relates to a modeling method of a reactive power compensation device model based on a controlled alternating current source. Background technique [0002] Since the 1980s, the application of flexible AC transmission system (FACTS) technology in power systems has become a research hotspot. Among them, static var compensator (SVC) and static synchronous Functions such as low-frequency oscillation and voltage flicker have been more and more researched and applied, and SVC and STATCOM devices with high voltage level and large capacity are continuously used in my country's power system. SVC integrates capacitors or reactors into the grid or disconnects them from the grid by controlling two anti-parallel thyristors, so as to generate or absorb reactive power. Its composition includes: thyristor controlled reactor (TCR), thyristor controlled high impedance transformer (TCT), thyr...

AI Technical Summary

Problems solved by technology

The commonly used PSASP and PSD-BPA power system simulation software in China contain several electromechanical transient models of SVC and STATCOM. However, these models are mainly based on the physical structure and control strategy of SVC and STATCOM devices, and do not fully consider the control of these devices. Due to the commonality of structure and grid-connected characteristics, the built model structures are various, and the interface forms with the grid also include admittance, current, etc., which is not convenient for the standardized realization of power system simulation software, and also causes power system reactive power compensation devices. Variety of models and complexity of analysis

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