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《Automation of Electric Power Systems》 2008-08
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Coordination of Continuous Variables and Discrete Variables in Automatic Voltage Control Part One Coordinated Voltage Control for Substations

GUO Qinglai1,SUN Hongbin1,ZHANG Boming1,WU Wenchuan1,WANG Bin1,LI Zhuhua1,TANG Lei1,WANG Pei2,NING Wenyuan2,ZHENG Yantao2,YUAN Ping2(1.State Key Lab of Power Systems,Department of Electrical Engineering,Tsinghua University,Beijing 100084,China;2.North China Power Dispatching Bureau,Beijing 100053,China)  
Reactive power/voltage regulation problems include continuous variables(for example,Mvar powers of generators and condensers)and discrete variables(i.e.,capacitors,reactors,OLTCs,and so on).In Automatic Voltage Control(AVC),coordination of continuous and discrete variables must be considered inside one substation or among power plants and substations.A coordination strategy—"discrete variables are firstly adjusted,continuous variable is followed by secondary refined adjustment" is presented.A centralized control mode,which uses local VQC devices as backup controllers,is designed to solve voltage coordination problems inside one substation.For each substation,the regulating direction of reactive sources is determined by expert rules firstly,then total Mvar output required is allocated between continuous variables and discrete variables according to sensitivity analysis.The proposed approach has been implemented in several regional and provincial power grids in China.The application results have validated the efficiency and practicability of the proposed method.
【Fund】: 国家高技术研究发展计划(863计划)资助项目(2006AA05Z217);; 中国博士后科学基金资助项目(20060400058);; 教育部新世纪优秀人才支持计划资助项目(NCET-05-0074)~~
【CateGory Index】: TM76
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