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Mixed type power quality controlling device

A power quality, hybrid technology, applied in harmonic reduction devices, flexible AC transmission systems, active power filtering, etc., can solve the problem of high complexity

Active Publication Date: 2010-12-22
ZHUZHOU NAT ENG RES CENT OF CONVERTERS
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  • Summary
  • 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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  • Mixed type power quality controlling device
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Embodiment Construction

[0039] 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.

[0040] 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 type power quality controlling device comprising an active part and a passive part, wherein the active part comprises active power filters (APFs) and static var generators (SVGs), the SVGs are used for supplying transient reactive power, and the APFs are used for filtering harmonic waves; the number of the APFs and the SVGs is at least two groups, and the APFs and the SVGs are connected with a three-phase power grid in parallel through a transformer isolation mode; the passive part comprises a static var compensator (SVC) which is used for supplying steady-state var power, wherein the SVC comprises a thirstier switching capacitor (TSC), a thirstier control reactor (TCR), and a fixed capacitance compensator (FC); the TSC, the TCR and the FC are directly connected with the three-phase power grid, the TSC is used for supplying high-capacity capacitive var power, the FC is used for supplying low-capacity var power and is also used as a main subharmonic filtering branch circuit to carry out harmonious comprehensive compensation and harmonic control on a power system.

Description

technical field [0001] The invention relates to a power quality control device, in particular to a novel parallel hybrid active and passive power quality control device 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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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/18H02J3/01
CPCY02E40/40Y02E40/22Y02E40/12Y02E40/10Y02E40/20
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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