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Mixed power quality treatment method

A power quality, hybrid technology, used in flexible AC transmission systems, active power filtering, AC networks to reduce harmonics/ripples, etc., and can solve problems of high complexity

Active Publication Date: 2010-12-22
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 following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

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

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Abstract

The invention discloses a mixed power quality treatment method. In an active part, at least two groups of SVG and at least two groups of APF are connected to a three-phase power network in a transformer isolation mode, wherein the SVG mainly compensates reactive current, the APF compensates harmonic current, and when the voltage dips seriously, the APF can also serve as a reactive generator to make up for the deficiency of the SVG capacity to support the voltage; and in a reactive part, a large-capacity directly hung SVC combined by TCR, TSC and FC is directly connected to the three-phase power network for reactive compensation, the TCR is subjected to three-phase unbalance control so as to compensate three-phase unbalance, a thyristor-switched capacitor TSC provides large-capacity capacitive reactive power, a fixed capacitor-compensated FC provides small-capacity reactive power, and the fixed capacitor-compensated FC also serves as a main subharmonic filtering subcircuit of a thyristor-controlled reactor TCR for coordinative comprehensive compensation and harmonic treatment of a power system.

Description

technical field [0001] The invention relates to a power quality control method, in particular to a novel parallel hybrid active and passive power quality control method applied to power supply and distribution systems. 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 whether it is economical to use electricity. With the increasing use of power electronic devices and sensitive loads, power quality issues have become the primary technical issue concerned by the international power supply community, which is mainly reflected in voltage fluctuations, harmonics, flicker, etc., as well as reactive power and load in current. order, the influence of 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 equipment productivi...

Claims

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Application Information

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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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