Three-phase three-wire system mixed type integrated power system electric energy quality regulator

Abstract

The invention relates to a three-phase three-wire system mixed type integrated power system electric energy quality regulator, and belongs to the technical field of electric automation equipment. The three-phase three-wire system mixed type integrated power system electric energy quality regulator comprises a series compensation module and a parallel compensation module, wherein the series compensation module is connected with a power system, the parallel compensation module is connected with power system loads, and the series compensation module and the parallel compensation module are connected through a direct current bus. According to the electric energy quality regulator, a filter capacitor is added in the parallel compensation module, a three-phase converter in the parallel compensation module is enabled to only provide harmonic voltages, volume of the three-phase converter is lowered, device cost can be saved and work efficiency can be improved; the regulator can be used in a medium-voltage environment without a coupling transformer; the filter capacitor is added in the parallel compensation module, harmonic waves are compensated to the power system, and a certain reactive current can be provided for the loads at the same time; and compensation effect is good, cost performance is high, and application range is wide.

Description

technical field [0001] The invention relates to a three-phase three-wire mixed-type unified grid power quality regulator, which belongs to the technical field of electrical automation equipment. Background technique [0002] At present, a large number of applications of various power electronic devices in the power grid have greatly improved the utilization rate of electric energy, but what follows is: the harmonics and reactive currents caused by these power electronic devices have seriously polluted the power grid, affect the power quality of the grid. With the increasing popularity and development of power electronic devices, the harmonics in the power grid and the harm they cause are becoming more and more serious, which has attracted the attention of all countries in the world. [0003] Active Power Filter (APF for short) is gradually being widely used because of its good harmonic compensation effect. APF can be divided into series type and parallel type according to ...

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Problems solved by technology

The cost performance of the system is greatly reduced in terms of economy and performance

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