摘要
针对某电厂1000MW的发电机组建立基于PSCAD的仿真模型,分别仿真失磁和振荡故障,找到两者区别。根据电厂所采用的保护装置建立三段式失磁保护仿真模块,并分别在失磁和振荡情况下仿真验证保护动作的正确性。仿真结果表明,所建立的仿真模型能很真实地模拟该发电厂的失磁故障,失磁后电气量的波形特点与理论分析一致,建立的失磁保护模块能够可靠地躲过振荡故障并正确动作于失磁故障。仿真结果为电厂的保护配置方案设计提供了可靠依据。
The excitation - loss simulation model was established b y the use of PSCAD, which is based on a generator with 1000MW of a certain power plant. The differences between excitation-loss and oscillation were simulated and compared. The three-stage excitation-loss protection model was established according to the power plant protection device. Then simulate and verify the accuracy of protection activity in the excitatin-loss oscillation. The simulation results show that the simulation model can simulate accurately the excitation- loss of the power plant. The electrical quantities obtained by PSCAD are consistent with the theory. Moreover, the protection model is able to response to excitation-loss fault and will not act by mistake on oscillation. The simulation results provide reliable basises for the protection design of power plant.
出处
《电气自动化》
2012年第5期46-49,64,共5页
Electrical Automation
关键词
失磁仿真
PSCAD
保护判据
发电机
Loss of excitation simulation
PSCAD
Protect configuration
Generator
