输电线开断控制对交直流混联电力系统暂态稳定性影响研究  

Research on Influence of Transmission Line Breaking Control on Transient Stability of AC/DC Hybrid Power System

作　　者：于枋彤 刘铖[1] 张宇驰 YU Fangtong;LIU Cheng;ZHANG Yuchi(Electrical Engineering College,Northeast Electric Power University,Jilin Jilin 132012)

机构地区：[1]东北电力大学现代电力系统仿真控制与绿色电能新技术教育部重点实验室,吉林吉林132012

出　　处：《东北电力大学学报》2023年第1期85-91,共7页Journal of Northeast Electric Power University

基　　金：国家重点研发计划资助项目(2021YFB2400800)。

摘　　要：针对交直流混联电力系统暂态稳定问题,输电线路开断(Transmission Switching,TS)控制可以作为一种调控手段以避免混联系统崩溃。输电线路的开断通过改变网络拓扑结构来优化混联系统的有功潮流,影响支路暂态势能分布。文中从网络能量角度对失稳混联系统割集支路的能量稳定程度加以分析,设计输电线路开断调控策略。首先构建支路开断评价指标寻找可改善割集支路能量稳定性的线路;进而采用多目标0-1规划筛选最优开断线路组合;最后对含直流线路的十机系统进行仿真,验证所提组合断线控制策略的有效性。In view of the transient stability of the AC/DC hybrid power system,transmission switching(TS)control of transmission lines can be used as a control method to avoid the collapse of the hybrid system.The interruption of the transmission line optimizes the active power flow of the hybrid system by changing the network topology,and affects the branch’s transient potential energy distribution.This paper analyzes the energy stability of the cut-set branch of the unstable hybrid system from the perspective of network energy,and designs the control strategy for the interruption of the transmission line.Firstly,the branch circuit breaking evaluation index is constructed to find the lines that can improve the energy stability of the cut-set branch;then the multi-objective 0-1 planning is used to screen the optimal circuit breaker combination;finally,the ten-machine system with DC lines is simulated to verify the effectiveness of the proposed combined disconnection control strategy.

关 键 词：暂态稳定性 交直流混联电力系统 网络能量 输电线路开断 

分 类 号：TM712[电气工程—电力系统及自动化]