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http://dx.doi.org/10.5370/JEET.2017.12.1.053

A Two-stage Stochastic Programming Model for Optimal Reactive Power Dispatch with High Penetration Level of Wind Generation  

Cui, Wei (Dept. of Electrical Engineering, Chongqing University)
Yan, Wei (Dept. of Electrical Engineering, Chongqing University)
Lee, Wei-Jen (Dept. of Electrical Engineering, The University of Texas at Arlington)
Zhao, Xia (Dept. of Electrical Engineering, Chongqing University)
Ren, Zhouyang (Dept. of Electrical Engineering, Chongqing University)
Wang, Cong (Dept. of Electrical Engineering, Chongqing University)
Publication Information
Journal of Electrical Engineering and Technology / v.12, no.1, 2017 , pp. 53-63 More about this Journal
Abstract
The increasing of wind power penetration level presents challenges in classical optimal reactive power dispatch (ORPD) which is usually formulated as a deterministic optimization problem. This paper proposes a two-stage stochastic programming model for ORPD by considering the uncertainties of wind speed and load in a specified time interval. To avoid the excessive operation, the schedule of compensators will be determined in the first-stage while accounting for the costs of adjusting the compensators (CACs). Under uncertainty effects, on-load tap changer (OLTC) and generator in the second-stage will compensate the mismatch caused by the first-stage decision. The objective of the proposed model is to minimize the sum of CACs and the expected energy loss. The stochastic behavior is formulated by three-point estimate method (TPEM) to convert the stochastic programming into equivalent deterministic problem. A hybrid Genetic Algorithm-Interior Point Method is utilized to solve this large-scale mixed-integer nonlinear stochastic problem. Two case studies on IEEE 14-bus and IEEE 118-bus system are provided to illustrate the effectiveness of the proposed method.
Keywords
Costs of adjusting the compensators; Two-stage stochastic programming; Three-point estimate method; Uncertainty; Wind power;
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