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

A power quality, three-phase three-wire technology, applied to the AC network to reduce harmonics/ripples, reactive power adjustment/elimination/compensation, reactive power compensation, etc., can solve problems such as greatly reduced cost performance, and achieve high cost performance, Good harmonic compensation effect, the effect of improving work efficiency

Active Publication Date: 2013-04-24
TSINGHUA UNIV
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Problems solved by technology

The cost performance of the system is greatl

Method used

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

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[0022] The three-phase three-wire hybrid unified power grid power quality regulator proposed by the present invention has a circuit schematic diagram such as figure 2 As shown, it includes a series compensation module and a parallel compensation module. The series compensation module is connected to the power grid, the parallel compensation module is connected to the grid load, and the series compensation module and the parallel compensation module are connected through a DC bus.

[0023] The above series compensation module includes a three-phase converter 1, a three-phase transformer 2, and three filter reactors L f1a / L f1b / L f1c , Three filter capacitor branches C f1a / C f1b / C f1c And three groups of anti-parallel thyristors S 1a / S 1b / S 1c . DC terminal of three-phase converter 1 and DC bus C dc In parallel, the AC end of the three-phase converter 1 is connected to the three filter reactors L f1a / L f1b / L f1c Connected to one end, three filter reactors L f1a / L...

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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 ...

Claims

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Application Information

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IPC IPC(8): H02J3/01H02J3/18
CPCY02E40/30Y02E40/40
Inventor 耿华朱天博杨耕乔正盛杜小刚
Owner TSINGHUA UNIV
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