Single-phase bidirectional continuously adjustable static reactive power compensator

Abstract

The invention discloses a single-phase bidirectional continuously adjustable static reactive power compensator, the compensator comprises a control system and a compensation loop, the compensation loop is connected on a phase line and a null line, and a high-pass filter composed of a filtering reactor and a filtering capacitor is arranged between the phase line and the null line; the compensationloop also comprises a transformer, a first power switch is arranged between a primary side positive end of the transformer and the filtering reactor, and a second power switch is arranged between theprimary side positive end of the transformer and the null line; a capacitance compensation circuit and a reactance compensation circuit, arranged in parallel, are set between a secondary side positiveend of the transformer and the filtering reactor; and the first power switch, the second power switch, a capacitance power switch and the reactance power switch are all controlled by the control system to realize on and off. The single-phase bidirectional continuously adjustable static reactive power compensator provided by the invention solves a defect that capacitor compensation cannot be adjusted continuously, and further improves system stability in combination with the advantage of accurate compensation of the static reactive power compensator.

Description

technical field [0001] The invention belongs to the technical field of static var compensators, in particular to a single-phase static var compensator capable of bidirectional continuous adjustment. Background technique [0002] Electric energy is an indispensable and important energy source in modern society, and it has been widely used in different fields, which also makes the load capacity of modern power grid very severe. With the development of modern industrial technology, the nonlinear load in the power system has increased a lot, and with the improvement of our living standards and the development of technology, many power electronic loads have appeared. Especially with the emergence of electric vehicles, a large number of charging piles have been connected to the distribution network, and with the development of battery technology, various fast charging technologies and batteries have emerged, resulting in an increasing demand for distribution network capacity, seri...

AI Technical Summary

Problems solved by technology

This method balances the inductive reactive power through the combination of different capacitors. It has a simple structure and low price, but the equipment is large in size and can only compensate fixed inductive reactive power. There is a danger of harmonic amplification.

And the capacitor is relatively easy to damage and has the disadvantage of low service life

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