35KV large capacity reactive compensation and harmonic suppression integrated system and control method thereof

Abstract

The invention discloses a 35KV large capacity reactive compensation and harmonic suppression integrated system and control method thereof. The 35KV mass storage reactive compensation and harmonic suppression integrated system comprises an active power filter(APF), an inductance, an isolation transformer and multi-group passive filters, wherein the APF is formed by a connection of an DSP controller and an inverter, the output of the APF travels through the filtering inductance and is in parallel connection with the isolation transformer on primary side, the isolation transformer is in series with the single turned passive on secondary side, and the active part as a injection branch of the APF is in parallel connection with the multi-group passive filters into a power grid. The system has simple structure and can manage the harmonic wave of the high-power power grid well, at the same time, the system can compensate the large capacity reactive power. The system has the greatest strengths of low sustainable fundamental voltage of APF and low storage needed inverter, and when the system is powered up or the voltage of the power grid changes immediately, the active part receives small impact and the system has high stability.

Description

technical field [0001] The invention relates to a topological structure and a control method of a high-voltage large-capacity reactive power compensation and harmonic suppression comprehensive system, in particular to a 35KV large-capacity reactive power compensation and harmonic suppression comprehensive system and a control method thereof. Background technique [0002] Electric energy is the main and essential energy in the production of modern society and people's life. With the development of power electronics technology, a large number of nonlinear loads have been added to the power supply system. It is a nonlinear time-varying topological load, which cannot Avoidance will generate non-sinusoidal waveforms, injecting harmonics into the grid. With the advent of the information age, more and more electrical users have put forward new requirements for the control and processing of the electric energy form and power flow. Therefore, harmonics have become a "public nuisance"...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a comprehensive control system suitable for high-voltage and large-capacity reactive power compensation and harmonic suppression, which can better control the harmonics in the high-power grid, and at the same time compensate the large-capacity reactive power, and solve the current problem. There are problems of high system cost, low stability and reliability, and great impact on active parts

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