摘要
本文针对核电ALSTOM P320 V2励磁系统过励限制振荡现象,分析了ALSTOM励磁系统过励限制辅助控制环模型以及介入主电压环的独特方式。从时域和频域两个角度分析了过励限制振荡的机理,提出了该型励磁过励限制控制环临界增益的概念,并推荐了主环PID微分时间常数的整定范围。通过现场实际核电机组励磁系统过励限制试验验证了本文提出的振荡抑制措施的可行性与正确性。
This paper analyzes the over excitation limiter(OEL) simulation model of the ALSTOM P320 V2 excitation system used by nuclear power generators in China. The way of OEL output received as input into the main loop is presented for studying on the OEL oscillation occurred at an actual Nuclear Power Unit. The oscillation phenomenon is reproduced in time domain simulation and the oscillation mechanism is revealed by frequency domain root locus anslysis. The concept of critical gain of the over excitation limitation control loop of ALSTOM excitation system is proposed, and the tuning range of the main loop differential time constant is recommended. The feasibility and correctness of the damping measures on OEL oscillation are verified by field test at a real nuclear power unit.
作者
江伟
JIANG Wei(State Grid Fujian Electric Power Research Institute,Fuzhou 350007,China)
出处
《大电机技术》
2019年第6期73-80,共8页
Large Electric Machine and Hydraulic Turbine
基金
国网福建省电力有限公司科技项目(52130417000J)
关键词
核电机组
振荡
根轨迹分析
励磁建模
过励限制器
nuclear power unit
oscillation
root locus analysis
excitation system modeling
over excitation limiter
