Voltage/VAR Control in Distribution Networks via Reactive Power Injection Through Distributed Generators

被引:128
作者
Deshmukh, Siddharth [1 ]
Natarajan, Balasubramaniam [1 ]
Pahwa, Anil [1 ]
机构
[1] Kansas State Univ, Dept Elect & Comp Engn, Kansas City, KS 66506 USA
关键词
Convex optimization; distributed generation; distribution network; sequential convex programming; voltage/VAR control;
D O I
10.1109/TSG.2012.2196528
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This paper demonstrates how reactive power injection from distributed generators can be used to mitigate the voltage/VAR control problem of a distribution network. Firstly, power flow equations are formulated with arbitrarily located distributed generators in the network. Since reactive power injection is limited by economic viability and power electronics interface, we formulate voltage/VAR control as a constrained optimization problem. The formulation aims to minimize the combined reactive power injection by distributed generators, with constraints on: 1) power flow equations; 2) voltage regulation; 3) phase imbalance correction; and 4) maximum and minimum reactive power injection. The formulation is a nonconvex problem thereby making the search for an optimal solution extremely complex. So, a suboptimal approach is proposed based on methods of sequential convex programming (SCP). Comparing our suboptimal approach with the optimal solution obtained from branch and bound method, we show the trade-off in quality of our solution with runtime. We also validate our approach on the IEEE 123 node test feeder and illustrate the efficacy of using distributed generators as distributed reactive power resource.
引用
收藏
页码:1226 / 1234
页数:9
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