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Predictive Optimal algorithm based Coordinated voltage Control for large power system

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4 Author(s)
Peng Ye ; Shenyang Univ. of Technol., Shenyang ; Qing Bian ; Jiahua Song ; Bing Yao

Misbalance between reactive power production and consumption in power system causes the variation of node voltage outside the proposed limit. It is a main task for system operators to maintain the voltage profile against any unexpected disturbance. In this paper a simple and practical coordinated secondary voltage control (CSVC) method was present, which was based on the predictive optimal algorithm. By taking the changing tendency of reactive power into consideration, a discrete predictive optimal control scheme was proposed, additional measurements were used in order to offset the effects of the loads variation and the changing of reactive power among neighboring areas. Grey model (GM) was employed to predict the changing tendency of reactive power in the tie lines and in the main loads node. Then based on the prediction results an optimal calculation was used to get the control law in each control step with the consideration of reactive power changing tendency. The simulation results as examples on the large power system were presented to illustrate the validity of the improved control scheme.

Published in:

Power System Technology, 2006. PowerCon 2006. International Conference on

Date of Conference:

22-26 Oct. 2006

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