基于负荷模式能量的电力系统低频振荡抑制策略  

Power system low-frequency oscillation suppression strategy based on load mode energy

作　　者：刘铖 王旭[1] 蔡国伟 张宇驰 LIU Cheng;WANG Xu;CAI Guowei;ZHANG Yuchi(Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology,Ministry of Education,Northeast Electric Power University,Jilin 132012,China)

机构地区：[1]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(东北电力大学),吉林吉林132012

出　　处：《电力自动化设备》2022年第7期229-235,共7页Electric Power Automation Equipment

基　　金：国家自然科学基金青年基金项目(52007027);国家重点研发计划项目(2021YFB2400800);吉林市科技创新发展计划项目(20210103093);吉林省教育厅科学研究项目(JJKH20210092KJ)。

摘　　要：随着电力市场化和需求侧管理的快速发展,以及虚拟电厂聚合平台的逐步成熟,负荷可控性越来越强,为从负荷侧抑制低频振荡提供了可能。针对系统在振荡过程中出现的小干扰稳定问题,提出了基于负荷模式能量的电力系统低频振荡调控策略。构建电力系统小干扰负荷模式能量函数,从负荷的角度揭示电力系统低频振荡特性。基于负荷模式能量建立负荷的低频振荡评价指标与灵敏度指标,确定负荷参与改善系统小干扰特性的调控方式,对所有可控负荷进行排序,筛选出最优调控负荷。最后,对3机9节点系统和16机68节点系统算例进行仿真计算,结果表明所提控制策略可有效抑制系统振荡。With the rapid development of electricity marketization and demand-side management,as well as the gradual maturity of virtual power plant aggregation platform,the load controllability is getting stronger and stronger,which provides the possibility for suppressing low-frequency oscillation at the load side.Aiming at the small-disturbance stability problem in the system oscillation process,the power system low-frequency oscillation control strategy based on load mode energy is proposed.The energy function of the small-disturbance load mode for the power system is constructed,and the low-frequency oscillation characteristics of the power system are revealed from the perspective of load.Based on load mode energy,the low-frequency oscillation evaluation index and sensitivity index of load are established.The control method for load to participate in improving the small-disturbance characteristics of system is determined.Then,all controllable loads are sorted to select the optimal control load.Finally,simulations are carried out for the 3-machine 9-bus system and 16-machine 68-bus system,and the results show that the proposed control strategy can effectively suppress system oscillation.

关 键 词：可控负荷 负荷模式能量函数 低频振荡 负荷灵敏度指标 小干扰稳定 

分 类 号：TM712[电气工程—电力系统及自动化]