风电接入下基于半监督谱聚类的备用动态分区方法

Reserve Dynamic Zone Partitioning Method Based on Semi-Supervised Clustering Considering Wind Power

随着新能源的不断接入和电网结构的日益复杂,电力系统运行状态复杂多变,基于固定分区的旋转备用计算方法无法有效应对源-网-荷的波动性以及由此引起的线路阻塞问题。为此,首先研究了能量-备用联合优化机组组合问题;其次考虑风电出力的不确定性和线路N-1故障,建立了线路阻塞的风险评估方法;然后以阻塞线路的功率转移分布因子(power transfer distribution factor,PTDF)为相似性测度,提出了基于半监督谱聚类的分区迭代划分方法;最后基于动态分区结果确定备用容量配置。文章分别采用39节点及118节点系统进行算例仿真,结果表明本文所提出的备用动态分区方法可自动确定分区数目,合理进行备用分区,备用动态分区后可有效保证旋转备用可用性。

With the continuous access of new energy and the increasingly complex structure of the power grid, the operating state of the power system is complex and changeable. The spinning reserve calculation method based on fixed zone partitioning is unable to effectively deal with the volatility of the source-network-load and the resulting congestion transmission problem. Firstly a energy and reserve co-optimization unit commitment is studied. Secondly congestion transmissions are evaluated considering wind power uncertainty and N - 1 contingency. Then, taking the power transfer distribution factor （PTDF） of congestion line as similarity measure, partition iterative method is proposed based on semi- supervised spectral clustering. Finally, reserve capacity configuration is determined based on the result of dynamic zone partitioning. This paper use a 39 bus system and a 118 bus system separately for simulation. The result shows that the proposed reserve dynamic zone partitioning method can automatically determine the number of zone partitioning and is reasonable to reserve partition; the zonal reserve could guarantee the delivery of spinning reserve.