NDLI: Distributed Reactive Power Optimization Computing in Multi-area Power Systems Using Ward Equivalent

Content Provider	IEEE Xplore Digital Library
Author	Zhi-wen Liu Ming-bo Liu
Copyright Year	2010
Abstract	This paper presents a new decomposition and coordination algorithm based on Ward equivalent to solve distributed reactive-power optimization problem in multi-area power system. At first, multi-area interconnected power system is partitioned into master and slaver areas, boundary buses are defined as different bus types respectively corresponding to different areas, and hence the transfer method of phase angles from master area to slaver areas is determined. Secondly the initial value of equivalent injection power is obtained according to power-flow calculation at basic operating state. Then computational efficiency of the equivalent admittance matrix of external network due to change of transformer ratios is highly enhanced during optimization process by means of the inverse matrix modification lemma, and also the equivalent accuracy of external network is improved greatly. Moreover a kind of external coordination strategy which is suitable for reactive-power optimization calculation is introduced and better coordination effects with less coordination communications are obtained. Finally testing results on 538-bus practical systems is used to validate the correctness and effectiveness of the proposed algorithm in comparison with the centralized optimization method.
Starting Page	3659
Ending Page	3663
File Size	420430
Page Count	5
File Format	PDF
ISBN	9781424468805
e-ISBN	9781424468812
DOI	10.1109/iCECE.2010.893
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-06-25
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Reactive power Multi-area power systems Inverse Matrix Modification Lemma Ward equivalent Disturbited reactive power optimization Admittance Mathematical model Decomposition and coordination Optimization Equations Load flow
Content Type	Text
Resource Type	Article

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