基于全纯嵌入法的电力系统解耦模型:薄弱节点辨识  

Power System Decoupling Model Based on Holomorphic Embedding Method: Weak Bus Identification

作　　者：刘承锡 赖秋频 姚良忠 徐箭[1] 孙元章[1] LIU Chengxi;LAI Qiupin;YAO Liangzhong;XU Jian;SUN Yuanzhang(School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,Hubei Province,China)

机构地区：[1]武汉大学电气与自动化学院,湖北省武汉市430072

出　　处：《中国电机工程学报》2022年第5期1736-1747,共12页Proceedings of the CSEE

基　　金：国家自然科学基金项目(52007133)。

摘　　要：快速准确地识别电压薄弱节点对于电力系统的安全稳定运行至关重要。为此,构建电力系统解耦模型,并提出一种可视化预测预期运行环境中电压薄弱节点的方法。首先通过建立两节点虚拟通道对电力系统进行解耦,并为每个节点赋予特有的电压指标,同时引入电压稳定边界;接着提出含可调嵌入因子的全纯嵌入法来推导电压指标轨迹的解析表达式;最后将穿过电压稳定边界的电压指标轨迹所对应的节点识别为预期运行环境中的电压薄弱节点。在IEEE14节点,39节点和118节点电力系统上的仿真结果验证所提方法的有效性和准确性。Fast and accurate identification of weak buses is of great importance for the secure and stable operation of power system. For this purpose, a power system decoupling model was developed, and a visual method for predicting weak buses in prospective operating conditions was proposed.Firstly, two-bus virtual channels were constructed for power system decoupling. Accordingly, each bus was endowed with a unique voltage index, and a voltage stability boundary was introduced. Then, the holomorphic embedding method with a scalable embedded factor was proposed to derive analytical expression of voltage index trajectory. Thus, the buses whose voltage index trajectories cross the voltage stability boundary were identified as the weak buses in the prospective operating conditions. Test results on the IEEE 14-bus, 39-bus and 118-bus power systems validate the effectiveness and accuracy of the proposed method.

关 键 词：薄弱节点辨识 潮流方程 电力系统解耦 电压稳定边界 两节点虚拟通道 全纯嵌入法 

分 类 号：TM712[电气工程—电力系统及自动化]