发电机励磁调节器低励限制协调控制分析_丁傲.pdfVIP

第 36 卷 第 8 期 电 网 技 术 Vol. 36 No. 8 2012 年 8 月 Power System Technology Aug. 2012 文章编号：1000-3673 （2012 ）08-0193-06 中图分类号：TM 761 文献标志码：A 学科代码：470·4054 发电机励磁调节器低励限制协调控制分析 丁傲，谢欢，刘平，吴涛，苏为民，付宏伟，赵炎 （华北电力科学研究院有限责任公司，北京市西城区 100045 ） Analysis on Coordinated Control of Under-Excitation Limiter of Generator Excitation Regulator DING Ao, XIE Huan, LIU Ping, WU Tao, SU Weimin, FU Hongwei, ZHAO Yan (North China Electric Power Research Institute Co., Ltd., Xicheng District, Beijing 100045, China) ABSTRACT: The reason of weakening system damping due to excitation limiter ，UEL) 和电力系统稳定器(power inappropriate setting of under excitation limiter (UEL) was system stabilizers，PSS)是励磁系统中 2 项重要的辅 analyzed, and it was pointed out that the component of 助环节[1-4] 。UEL 的主要作用是避免由发电机定子 electromagnetic torque provided by UEL, which was lagged 电流过大导致的绕组过热，且避免发电机在欠励磁 behind Δω by 180° in the direction of Δω, and the improper 下运行时静态稳定性破坏。PSS 则可有效抑制电力 matching of the acting frequency band of UEL with power system stabilizer (PSS) were the main reason leading to the 系统低频振荡，提高系统稳定性[5-6] 。 weakening of unit damping; and using simulation software 对于大容量长距离送电系统在夜间负荷较轻 PSS/E and Matlab a user defined model of excitation control 时，系统容性无功过剩，发电机组常需要进相运行， system for single-machine infinite-bus system was built and the 甚至导致励磁系统 UEL 动作。UEL 参数整定不合 results of theoretical analysis were verified by simulation 理时，常常会干扰 PSS 的特性，从而给系统稳定造 results. It was further proved by simulati