摘要
电力系统中持续周期性的小扰动可能引起联络线大幅度强迫功率振荡,扰动源很难发现和捕捉。提出基于割集能量及灵敏度的强迫功率振荡扰动源识别方法。该方法基于强迫功率振荡的能量转换特性提出割集能量的概念,根据割集能量的流向进行扰动源识别,并通过割集能量对发电机有功出力的归一化灵敏度分析确定出关键控制机组。8机系统算例和华中电网算例均验证了该方法的正确性和实用性。割集能量法可借助广域测量系统提供的网络动态信息在线识别强迫功率振荡扰动源所在的割集,适用于广域系统中原动机功率扰动和负荷扰动下强迫功率振荡扰动源的准确定位。
The continuous and cyclical small disturbance in power system may cause forced power oscillation on tie line.It is difficult to locate the disturbance source.A method based on cutset energy and normalized sensitivity is proposed to identify the disturbance source of forced power oscillation,which,based on the energy conversion characteristics of forced power oscillation,defines the concept of cutset energy,identifies the disturbance source according to the flow of cutset energy,and recognizes the critical generators by analyzing the normalized sensitivity of cutset energy to the active power output of generators.Its correctness and practicability are verified by the case studies for an 8-machine system and the Central China Grid system.Based on the dynamic network information provided by the wide area measurement system,the proposed method can online identify precisely the cutest where the disturbance source of forced power oscillation caused by prime mover power disturbance or load disturbance locates.
出处
《电力自动化设备》
EI
CSCD
北大核心
2013年第1期75-80,共6页
Electric Power Automation Equipment
基金
国家电网公司大电网重大专项资助项目(SGCC-MPL-G029-2012)
国家高技术研究发展计划(863计划)(2011AA-05A119)~~
关键词
电力系统
广域系统
强迫功率振荡
割集能量
灵敏度分析
扰动源识别
electric power systems
wide area system
forced power oscillation
cutset energy
sensitivity analysis
disturbance source identification
