Unified electric energy quality controller

A power quality and controller technology, applied in the field of unified power quality controllers, can solve problems such as sub-module redundancy

Active Publication Date: 2015-05-13
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on this, the present invention provides a unified power quality controller, which can effectively solve the problem of sub-module redundancy, and has high voltage sag compensation capability and working stability

Method used

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Embodiment Construction

[0012] The present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0013] Such as figure 1 As shown, it is a schematic structural diagram of the unified power quality controller of the present invention in an embodiment, including a series unit 11 and a parallel unit; the series unit 11 includes two series converters 111 and three transformers (T a , T b , T c ), the parallel unit includes a parallel converter 121;

[0014] The three single-phase output terminals on the AC side of the two series converters (series converter 111 and series converter 112) are respectively connected to the three transformers (T a , T b , T c ), wherein the non-inverting output terminals of the two series converters (series converter 111 and series converter 112) are connected to the same transformer, and the resulting voltage passes through the three tran...

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Abstract

The invention provides a unified electric energy quality controller. The unified electric energy quality controller comprises a serial unit and a parallel unit, wherein the serial unit comprises two serial converters and three transformers; the parallel unit comprises a parallel converter; three single-phase output ends of alternating-current sides of the two serial converters are respectively connected to terminals of the three transformers; same-phase output ends of the two serial converters are connected with the same transformer; obtained voltage is coupled through the three transformers and then is serially connected into each single-phase feeder line of a three-phase feeder line; direct-current sides of the two serial converters are respectively connected to a direct-current side of the parallel converter; and three single-phase output ends of an alternating-current side of the parallel converter are respectively connected to each single-phase feeder line of the three-phase feeder line. According to the unified electric energy quality controller disclosed by the invention, a module redundancy problem is effectively solved, and a voltage sag compensation capability and the working stability are higher.

Description

technical field [0001] The invention relates to the technical field of power system power quality control, in particular to a unified power quality controller. Background technique [0002] Unified Power Quality Conditioner (UPQC) is a kind of power quality controller that can comprehensively solve voltage and current power quality problems. UPQC includes parallel units and series units. Among them, the series unit is used to solve the voltage problem and has the functions of DVR and DUPS; the parallel unit is used to solve the current problem and has the functions of D-STATCOM and APF. At present, there have been reports on the development of small-capacity experimental prototypes in China, but there is still a certain distance to practical engineering applications, especially in the field of medium-high voltage and large-capacity power supply. [0003] The emergence and development of Modular Multilevel Converter (MMC) technology provides a basis for the application of p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00
Inventor 王浩盛超徐柏榆马明刘正富张俊峰杨汾艳王奕曾杰孙闻陈晓科刘进军
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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