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Dai Yan1 ,Ni Yixin2 ,Wen F ushuan1 ,H an Zhenxiang1 1.Zhejiang U niversity,Hangzhou3 10027,China 2 .The University of Hong Kong,Hong Kong,China  
Currently,developing an accurate and feasible reactive power pricing is an important task for power system restructure.Such reactive power price can not be obtained by traditional optimal power flow models because the production cost of reactive power is ignored in these models.In this paper,both reactive power production cost of generators and investm ent cost of capacitors are included in total system operation cost.There are totally eightcases tested,in which we use different types of objective functions to observe reactive power prices under different OPF models and adopt different system operation conditions to observe how these conditions effectreactive power prices.According to the test results from a sample 5 -node system,some conclusions are reached: 1 After the inclusion of reactive power generation costs,the variations of the reactive power prices obtained by OPF computation over different buses become smaller. 2 The revenue of reactive power based on marginal price is much higher than the actual production cost of reactive power. 3 A consumer can install capacitor bank to avoid high marginal price of reactive power,and other consumers at nearby buses may also be benefited from this considerably. 4 The voltage control of a certain bus can lead to intensive fluctuations of reactive power marginal prices at nearby buses,and active power marginal prices may get affected as well.
【CateGory Index】: TM73;F123.9
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