| 引用本文: | 王玉龙,王宝华,陆桂华,杨支吉.基于PSCAD的大型机组失步保护仿真与整定校验[J].电力自动化设备,2013,33(10): |
| WANG Yulong,WANG Baohua,LU Guihua,YANG Zhiji.PSCAD-based setting calculation and simulation of out-of-step protection for large units[J].Electric Power Automation Equipment,2013,33(10): |
|
| 摘要: |
| 采用由一个透镜型阻抗元件和2个直线阻抗元件构成三元件型失步判据，给出了该判据的动作特性。说明了基于等面积原则的失步预测原理，进行了失步保护整定计算。采用PSCAD软件建立了单机容量为1 000 MW的三机无穷大系统的仿真模型、三元件型失步判据仿真模型和等面积预测失步的仿真模型。仿真结果表明，所提失步保护原理正确可靠，而且能精确地预测不稳定振荡并发出失步信号，通过滑极计数切除故障机组，且在稳定振荡时不误动。 |
| 关键词: 电力系统保护 失步振荡 滑极次数 等面积原则 整定 仿真 |
| DOI： |
| 分类号: |
| 基金项目: |
|
| PSCAD-based setting calculation and simulation of out-of-step protection for large units |
|
WANG Yulong1, WANG Baohua1, LU Guihua2, YANG Zhiji1
|
|
1.School of Automation，Nanjing University of Science and Technology，Nanjing 210094，China;2.Yizheng Power Supply Company，Yizheng 211400，China
|
| Abstract: |
| A criterion composed of a lens-type and two straight-line-type impedance components is proposed for the out-of-step protection and its operational characteristic is given. The out-of-step prediction based on the equal area criterion is introduced and the setting calculation of out-of-step protection is carried out. The simulation models are built with PSCAD for the infinite system with three 1 000 MW machines，the three-component criterion and the out-of-step prediction based on equal area criterion. Simulative results show that，the principle proposed for the out-of-step protection is correct and reliable；the unstable oscillation is precisely predicted with the out-of-step signal and the faulty unit is tripped by counting the sliding pole number；and there is no misoperation during stable oscillation. |
| Key words: electric power system protection out-of-step oscillation sliding pole number equal area criterion setting computer simulation |
