Fast Out-of-step Separation Criterion Applied in Single Measurement Side
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摘要: 在现有快速解列判据的基础上,以减少解列装置的使用量和解列判据的计算量为目的,提出了适用于单测量端的快速解列判据。分析了等值双机失步振荡系统中,快速解列判据组相关量在失步联络线功角超前端和滞后端的变化特征,重点改进这种解列方式的功角变化率判据和有功功率变化率判据,以解决现有快速解列判据的测量点在线路滞后端无法正确识别失步振荡的问题。BPA仿真结果证明改进的快速解列判据在线路任何一端都可有效辨别出线路失步情况。Abstract: Fast out-of-step separation criterion applied in single measurement side is proposed to reduce the application amount of the device and computation amount based on current fast out-of-step separation criterion. The changing characteristics of correlative variables of fast out-of-step separation criterion on leading end and laging end are studied based on equivalent two-machine out-of-step oscillation system.The power angle and active power criterion for out-of-step modeare improved to solve the problem that the out-of-step oscillation on measuring nodes at laging end of line cannot be identified correctly by fast out-of-step criteria. An actual power grid model is simulated by using BPA software, and simulation results prove that the line out-of-step can be distinguished by improved fast out-of-step separation criterion in each end of line.
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