A robust control scheme for medium-voltage-level DVR implementation

Li, YW; Vilathgamuwa, M; Blaabjerg, F; Loh, PC

dc.contributor.author	Li, YW	en
dc.contributor.author	Vilathgamuwa, M	en
dc.contributor.author	Blaabjerg, F	en
dc.contributor.author	Loh, PC	en
dc.date.accessioned	2014-03-01T01:56:27Z
dc.date.available	2014-03-01T01:56:27Z
dc.date.issued	2007	en
dc.identifier.issn	0278-0046	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/28099
dc.subject	dynamic voltage restorer (DVR)	en
dc.subject	H infinity control	en
dc.subject	multiloop control	en
dc.subject	resonant controller	en
dc.subject	stationary frame controller	en
dc.subject	voltage sag	en
dc.subject.classification	Automation & Control Systems	en
dc.subject.classification	Engineering, Electrical & Electronic	en
dc.subject.classification	Instruments & Instrumentation	en
dc.subject.other	RESTORER DVR	en
dc.subject.other	INVERTERS	en
dc.subject.other	SENSITIVITY	en
dc.subject.other	FEEDBACK	en
dc.subject.other	DESIGN	en
dc.subject.other	SYSTEM	en
dc.title	A robust control scheme for medium-voltage-level DVR implementation	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2007	en
heal.abstract	In this paper, a robust control scheme with an outer H infinity voltage control loop and an inner current control loop is designed and implemented on a medium-voltage (MV)-level dynamic voltage restorer (DVR) system. Through a simple selection of weighting functions, the synthesized Hoc controller would exhibit significant gains in the vicinity of positive- and negative-sequence fundamental frequencies, and therefore, it would be able to regulate both positive- and negative-sequence components effectively, with explicit robustness in the face of system parameter variations. A detailed discussion of H infinity controller weighting function selection, inner current loop tuning, and system disturbance rejection capability is presented. Finally, the designed control scheme is extensively tested on a laboratory 10-kV MV-level DVR system with varying voltage sag (balanced and unbalanced) and loading (linear/nonlinear load and induction motor load) conditions. It is shown that the proposed control scheme is effective in both balanced and unbalanced sag compensation and load disturbance rejection, as its robustness is explicitly specified.	en
heal.publisher	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC	en
heal.journalName	IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS	en
dc.identifier.isi	ISI:000248611800042	en
dc.identifier.volume	54	en
dc.identifier.issue	4	en
dc.identifier.spage	2249	en
dc.identifier.epage	2261	en