SVG parallel simulation system and control method therefor

Abstract

The invention discloses an SVG parallel simulation system and a control method therefor. The system comprises a collection module, an upper control module, and SVGs. The SVGs respectively consist of an SVG control module and an SVG main circuit module. The control method comprises the steps: collecting the load current data of RT-LAB simulation equipment and the output current data of each single SVG, transmitting the load current data to the upper control module, and transmitting the output current data of each single SVG to the corresponding control module; calculating and obtaining a reference current through the upper control module, equally distributing the reference current to the output reference current of each SVG, and finally transmitting the output reference current of each SVG to the corresponding control module; enabling each SVG to obtain and return a modulated wave according to the received reference output current and the output current, generating a carrier wave, comparing the modulated wave with the carrier wave, and obtaining a sine pulse width modulation wave according to a comparison result; transmitting the sine pulse width modulation wave to the RT-LAB simulation equipment, and enabling the RT-LAB simulation equipment to carry out the adjustment of the output current of each SVG according to the sine pulse width modulation wave and a control command.

Description

technical field [0001] The invention relates to an SVG parallel simulation system and a control method thereof, belonging to the technical field of simulation control. Background technique [0002] In recent years, with the continuous development of my country's electric power industry, a large-scale high-voltage transmission network has gradually formed, and the requirements for reactive power of the grid have become increasingly stringent. Like the active power supply, the reactive power generator is an indispensable part to ensure the power quality of the power system, reduce the loss of the power grid and ensure its safe operation. The unbalanced reactive power of the grid will lead to huge fluctuations in the system voltage, and in severe cases, it will cause damage to electrical equipment, system voltage collapse and stability damage accidents. As an important part of power quality, reactive power compensation plays a significant role in many aspects such as improving...

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Problems solved by technology

[0005] At present, the research on high-power SVG often adopts device series-parallel technology and multiplexing technology, but the series-parallel connection of devices will lead to voltage and current sharing problems among individuals, which will reduce the reliability of the system, and the common characteristics of multiplexing technologies are A unified control system coordinates the work of each module, and a failure of one module will directly affect the operation of the entire compensation device

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