计及电压不可行节点的配电网低电压治理方法

提出一种计及电压不可行节点的配电网低电压治理方法。首先给出了配电网电压不可行节点的基本概念，然后在配电网电压无功控制分区的基础上，构建了考虑电压不可行节点的广域无功控制的低电压治理模型。该模型包含无功补偿薄弱区的电压控制模型和无功补偿非薄弱区的无功优化两个子模型。对应的目标函数分别为电压不可行节点的电压越下限量最少和网损最低，约束条件则在传统的无功优化模型上更新电压不可行节点的电压幅值安全下限值。为了提高求解效率，采用一种并行协同进化算法求解所建模型。通过杭州某实际10 kV 55节点配电网进行仿真分析，验证了所提方法的有效性。

A solution method for low voltage problem in distribution network considering voltage-violated buses

This paper proposes a management method of distribution network''s wide-area reactive power control with low voltage-violated buses. The concept of voltage-violated bus is proposed, and based on this concept, the distribution network''s reactive power control with low voltage-violated buses is established. This model is composed of the controlled voltage sub-model for weak areas and the reactive power optimization sub-model for non-weak areas. The objectives are the minimum downside voltage deviation for voltage-violated buses and the minimum real power loss respectively. The set of constraints are based on the conventional reactive power optimization constraints and update the lower voltage boundary constantly. In order to enhance solving-efficiency, the parallel cooperative co-evolutionary differential evolution algorithm (PCCD-EA) is hired for solving the proposed model. Finally, a distribution system with 55 buses of Guangzhou is simulated, which verifies that the proposed method is effective. This work is supported by Natural Science Foundation of Chongqing (No. cstc2015jcyjBX0033).