A power quality combined compensation system and its application on three-phase large-power and impulse loads

Author

Dinghua, Zhang ; Weihua, Gui ; Chunhua, Yang ; Weian, Wang

Author_Institution

Coll. of Inf. Sci. & Eng., Central South Univ., Changsha

fYear

2008

fDate

16-18 July 2008

Firstpage

15

Lastpage

19

Abstract

On account of the capacity of active power filter (APF) is limited, a novel structure of combined compensation system is proposed to solve the question of Jerky loadpsilas power quality, including voltage flicker, harmonic pollution, and power factor low. This combined compensation system is composed of static var compensator (SVC) and active power filter (APF). In this system, the SVC is used for compensating reactive power quickly, as well as for improving three-phase unbalanced degree and negative phase-sequence current caused by impulse load. The APF is used for mitigating harmonics caused by Jerky load and thyristor controlled reactor(TCR). In order to realize decentralized control of SVC and APF, a reasonable topological structure is adopted. The operational principle of system, a new reactive power calculation method and control strategy is presented in detail. The feasibility and validity of the combined compensation system is verified by the waves and data of practical operation.

Keywords

active filters; decentralised control; power harmonic filters; power supply quality; reactive power control; static VAr compensators; Jerky load; active power filter capacity; control strategy; harmonic pollution; negative phase-sequence current; power factor; power quality; static var compensator; three-phase impulse loads; three-phase large-power loads; thyristor controlled reactor; voltage flicker; Active filters; Distributed control; Pollution; Power harmonic filters; Power quality; Power system harmonics; Reactive power; Static VAr compensators; Thyristors; Voltage fluctuations; APF(Active Power Filter); Harmonic suppression; Impulse load; Reactive power calculation; SVC(Static Var Compensator); TCR (Thyristor Controlled Reactor);

fLanguage

English

Publisher

ieee

Conference_Titel

Control Conference, 2008. CCC 2008. 27th Chinese

Conference_Location

Kunming

Print_ISBN

978-7-900719-70-6

Electronic_ISBN

978-7-900719-70-6

Type

conf

DOI

10.1109/CHICC.2008.4604957

Filename

4604957