失步解列装置信号检测点及解列断面的选取  

On Testing Point of Out-of-step Splitting Device and the Selection of Splitting Surface

作　　者：孟祥侠[1] 罗远翔[2] 

机构地区：[1]华北科技学院,北京101601 [2]东北电力大学,吉林吉林132012

出　　处：《东北电力技术》2011年第4期8-11,共4页Northeast Electric Power Technology

摘　　要：准确地检测失步信号并确定最佳的解列断面是终止电力系统振荡的关键。分析单机无穷大系统失稳时网络中不同部位支路相角差的变化特点,提出利用支路两端相角差作为失步解列原理的判据。对于多机系统,基于网络参数,确定了失步解列装置在系统中的信号检测点,并对解列断面的选取进行了探索性的分析。结果表明:失步解列装置应在网络结构脆弱、最易导致系统失稳的失步断面处检测信号;解列断面应在失稳的群间联络线对应的多个割集中选取潮流较小、构成割集的支路数较少的断面进行解列。对New England 10机系统进行了仿真分析,确定了失步解列装置的信号检测点和解列断面。Accurately detection of out-ofstep signal and determination of optimal splitting surface is the key point for stopping power system.By-pass phase angle difference between both terminals is served as the criterion of out-of-step principles,by analyzing variation characteristics of by-pass phase angle differences at different locations in the network when single machine infinite system looses stability.For multi-machine system,the signal detection point in the system of the out-of-step device is determined based on network parameter and exploratory analysis is made on the selection of splitting surface.The result shows for out-of-step devices signal detecting should be done when network structure is weak and easy to loose stability;as for splitting surface,it is better to select little flux,interconnections corresponding cut sets and by-pass with little cut sets.Simulations are done on New England 10 machine system to determine signal detecting points and splitting surface of the out-of-step devices.

关 键 词：支路相角差 失步断面 脆弱环节 信号检测点 解列断面 

分 类 号：TM71[电气工程—电力系统及自动化]