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《Automation of Electric Power Systems》 2008-10
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Heuristic Strategy for Dynamic Reactive Power Optimization Incorporating Action Time Constraints Between Adjacent Time Intervals

YAN Wei1, TIAN Tian1, ZHANG Haibing1, FU Jin2, MAO Guozhi2, LIU Zhihong2(1. State Key Laboratory of Power Transmission Equipment & System Security and New Technology,Chongqing University, Chongqing 400030, China; 2. Yangjiaping Power Supply Bureau, Chongqing 400051, China)  
Considering the conventional constraints of maximum allowable daily operating times for the on-load tap changer (OLTC) and capacitor and a new constraint of maximum allowable switching operations for OLTC between two adjacent time intervals, an effective model for dynamic reactive power optimization is proposed. Furthermore, all capacitors connected to one bus are regarded as one equivalent capacitor whose operating time is determined by the operating time of all its sub-capacitors. With this method the scale of control variables in the new model is greatly reduced, and the actual switching constraints can be satisfied as well on the principle of "first in first off, last in last off". To solve the dynamic optimization problem, a heuristic strategy for dealing with the dynamic constraints is presented on the basis of a hybrid intelligent algorithm. The sparse technique is adopted to enhance the performance of the proposed algorithm. Test results on IEEE 14-bus, IEEE 30-bus systems and a real power system demonstrate the efficiency of the proposed model and algorithm.
【Fund】: 国家自然科学基金资助项目(50577073)~~
【CateGory Index】: TM714
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