考虑无功裕度的电压自适应分区方法及主导节点的选择  

Voltage Adaptive Partitioning Method and Optimal Pilot-node Selection Considering Reactive Power Margin

作　　者：颜湘武 李若瑾 徐韵 YAN Xiangwu;LI Ruojin;XU Yun(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(North China Electric Power University),Changping District,Beijing 102206,China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京市昌平区102206

出　　处：《现代电力》2020年第2期117-124,共8页Modern Electric Power

基　　金：河北省自然科学基金项目(E2018502134)。

摘　　要：针对当前二级电压分区未能较好实现动态无干预调节的现状,基于电压/无功灵敏度及模块度函数,该文提出一种随电网运行工况实时变化的自适应动态分区和主导节点选择方法。以每个无功源为分区中心,根据电压/无功灵敏度大小将负荷节点映射到对应的无功源;构建考虑无功裕度的改进模块度函数,以其为衡量指标进行区域合并自动形成最佳分区。引入其他区域节点对本区主导节点的抗干扰指标,结合主导节点在本区域的可观性和可控性指标,确定主导节点选择方案。从区域内无功源控制灵敏度、无功裕度及主导节点的可观性出发,对分区结果进行评估验证。最后,以IEEE39节点系统为例进行仿真分析,验证了所提方法的有效性和优越性。Aiming at the current situation that the secondary voltage partition fails to achieve dynamic non-interference adjustment,an adaptive dynamic partitioning and pilot node selection method with real-time grid operating conditions was proposed based on the voltage/reactive sensitivity and modularity function.With each reactive power source as the partition center,each load node was mapped to the corresponding reactive power source according to the voltage/reactive sensitivity;an improved modularity function considering reactive power margin was constructed and used as a measure index to merge regions and automatically form the optimal partition.The anti-interference index of other regional nodes to the pilot nodes was introduced,and combined together with the observability and controllability index of the pilot nodes in the region to determine the selection scheme of the pilot nodes.The partition results were evaluated and verified based on reactive power source control sensitivity,reactive power margin and the observability of the pilot node.Finally,the IEEE-39 node system was taken as an example to verify the effectiveness and superiority of the proposed method.

关 键 词：动态分区 无功裕度 电压/无功灵敏度 改进模块度函数 主导节点 

分 类 号：TM732[电气工程—电力系统及自动化]