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Stability-index based method for optimal Var planning in distribution feeders

机译：基于稳定性指标的配电网无功优化规划方法

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摘要

The problem of the reactive energy optimal planning can be solved in a fast and efficient way using heuristic techniques. The latter reduce the number of the control variables to be determined and lead to a near global optimal solution. The capacitor appropriate locations are firstly determined by decisive indices then, their optimal sizes are calculated. In this paper a stability-index based method is presented. The nodes stability-indices are calculated for identifying the most sensitive nodes to be candidate for receiving near optimal standard capacitors that, reduce the feeder power losses, improve the voltage profile and maximise the economic saving (objective function). In this multi-objective optimisation problem, the commonly used voltage constraint is substituted by a new constraint on the branch reactive currents. This new constraint, allows overcoming the over compensation phenomenon by setting positive branch reactive currents. The solution is further improved by regulating the source node voltage. The proposed approach has been tested on several feeder examples and its effectiveness has been demonstrated through comparative studies. The obtained results have shown that the proposed approach leads to a promising and feasible solution.
机译：可以使用启发式技术快速有效地解决无功优化计划的问题。后者减少了要确定的控制变量的数量，并导致了接近全局的最优解。首先通过决定性指标确定电容器的适当位置，然后计算其最佳尺寸。本文提出了一种基于稳定性指标的方法。计算出节点稳定性指数，以识别出最敏感的节点，以候选这些节点来接收接近最佳的标准电容器，从而减少馈线功率损耗，改善电压曲线并最大程度地节省经济性（目标函数）。在此多目标优化问题中，常用的电压约束由分支无功电流上的新约束代替。这个新的约束允许通过设置正的分支无功电流来克服过补偿现象。通过调节源节点电压进一步改善了该解决方案。所提出的方法已经在多个馈线示例上进行了测试，并且通过比较研究证明了其有效性。获得的结果表明，所提出的方法导致了有希望和可行的解决方案。

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