Mixed power quality treatment method

A power quality and hybrid technology, applied in flexible AC transmission system, active power filter, AC network to reduce harmonic/ripple, etc., can solve high complexity problems

Active Publication Date: 2012-07-25
ZHUZHOU NAT ENG RES CENT OF CONVERTERS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses the traditional double-closed-loop control, which has high complexity for multiple PI adjustments.

Method used

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Embodiment Construction

[0061] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0062] As a specific implementation of a hybrid power quality control device of the present invention, such as Figure 5 The shown topology electrical schematic diagram specifically discloses the circuit topology of the hybrid power quality management device. Considering that flicker control requires the system response time of the compensation device to be within a power frequency cycle, combined with the maturity and cost-effectiveness ...

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Abstract

The invention discloses a mixed power quality treatment method. In an active part, at least two groups of static var generators and at least two groups of active power filters are connected to a three-phase power network in a transformer isolation mode, wherein the static var generators mainly compensate reactive current, the active power filters compensate harmonic current, and when the voltage dips seriously, the active power filters can also make up for the deficiency of the static var generator capacity; and in a reactive part, a directly hung static var generator combined by a thyristor-controlled electric reactor and a thyristor switched capacitor, as well as a fixed capacitance compensator is directly connected to the three-phase power network for reactive compensation, three-phase unbalance is compensated, the thyristor switched capacitor provides large-capacity capacitive reactive power, the fixed capacitance compensator provides small-capacity reactive power, and the fixed capacitance compensator also serves as a main subharmonic filtering subcircuit of the thyristor-controlled electric reactor for coordinative comprehensive compensation and harmonic treatment of a power system.

Description

Technical field [0001] The invention relates to a power quality governance method, in particular to a novel parallel hybrid active and passive power quality governance method applied to a power supply and distribution system. Background technique [0002] The power quality of the power supply and distribution system is directly related to the stability of the power system, the safety of electrical equipment and the economical use of electricity. With the increasing use of power electronic devices and sensitive loads, the power quality problem has become the primary technical concern of the international power supply community, which is mainly reflected in voltage fluctuations, harmonics, flicker, etc., as well as reactive power and negative power in current. The influence of sequence, harmonic components, etc. Through the management of power quality, not only can the voltage fluctuation and flicker of the power distribution system be suppressed, but also the productivity of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18H02J3/26H02J3/01
CPCY02E40/50Y02E40/40Y02E40/22Y02E40/12Y02E40/10Y02E40/20
Inventor 王卫安黄燕艳张定华谭胜武周方圆胡晓东周靖刘华东易海泉杨磊王才孝段世彦邓建华吕顺凯龙礼兰
Owner ZHUZHOU NAT ENG RES CENT OF CONVERTERS
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