Disc type reactor-based static synchronous compensator (STATCOM) and control method

Abstract

The invention relates to a disc type reactor-based static synchronous compensator (STATCOM) and a control method. The STATCOM comprises a signal acquisition and processing module, a master control module, a driving module, a power conversion module, a novel disc type reactor module and the like, wherein the signal acquisition and processing module is used for acquiring the voltage and current information of a three-phase power grid and the alternating current side output current and direct current side voltage information of the STATCOM in real time, and processing the acquired information; the master control module performs coordinate transformation and operation on the acquired information to obtain a required carrier phase shifted sinusoidal pulse-width modulation (CPS-SPWM) signal; the driving module generates a triggering pulse; and the power conversion module consists of three full-bridge linked strings. A disc type reactor is used, has the advantage of greatly reducing a size, a weight and electromagnetic pollution compared with a hollow reactor, and has the advantages of greatly reducing vibration and noise and remarkably improving the linearity of an inductor L compared with the conventional open core reactor. Reactive current in a power system can be dynamically compensated, harmonic waves can be suppressed, and the power quality and voltage stability of the power system can be effectively improved.

Description

technical field [0001] The invention relates to the field of reactive power compensation, in particular to a STATCOM based on a disc reactor, and also relates to a control method for the STATCOM based on a disc reactor, which is suitable for reactive power compensation of a three-phase power grid. Background technique [0002] With the rapid development of modern industry, nonlinear loads such as high-power power electronic devices and electric arc furnaces have been widely used. At the same time, it has brought more and more serious reactive power problems and harmonic pollution to the power grid, making the voltage and current of the power grid The waveform is distorted, the power quality is degraded and the safety of the power grid is threatened. Therefore, the flexible AC transmission system is of great significance to the development of modern human society, and SVC (Static Vat Compensator) and STATCOM (STATic synchronous COMPensator) are the basic technology and key eq...

AI Technical Summary

Problems solved by technology

[0005] One is the air-core reactor, which is large in volume and weight, consumes a large amount of non-ferrous metal aluminum or copper, and produces serious electromagnetic pollution during operation;

[0006] Another connection reactor is an iron core reactor with a mechanical air gap. This connection reactor has a lot of vibration and noise, and the linearity of its inductance L is not good.

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