调速器参数对水电主导系统稳定性影响及整定  

Influence of governor parameters on stability of hydropower dominant system and its setting

作　　者：杨若朴 陈亦平[2] 李崇涛[1] 张勇[2] 唐卓尧 杨荣照 黄济宇 YANG Ruopu;CHEN Yiping;LI Chongtao;ZHANG Yong;TANG Zhuoyao;YANG Rongzhao;HUANG Jiyu(School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049;China Southern Grid Power Dispatching and Control Center,Guangzhou 510663)

机构地区：[1]西安交通大学电气工程学院,西安710049 [2]中国南方电网电力调度控制中心,广州510663

出　　处：《水力发电学报》2019年第12期85-93,共9页Journal of Hydroelectric Engineering

基　　金：南方电网公司科技项目(ZDKJXM20160001)

摘　　要：水电主导调频的系统容易发生频率振荡现象,故在整定水轮机调速器PID参数时,往往以频率的小干扰稳定为目标进行优化。本文基于阻尼转矩法,分析了PID参数对频率振荡转矩和低频振荡转矩的影响,并通过四机二区系统进行了验证,研究结果表明,调整PID参数抑制频率振荡的同时,可能会加剧系统的低频振荡。最后提出一种适用于水电主导调频系统的PID参数整定方法,该方法在提高系统频率稳定性的同时,不会恶化弱阻尼低频振荡模式。Frequency oscillations tend to occur in a hydropower units-dominated primary frequency regulating system.In setting PID parameters of the turbine governor,small disturbances in the stability of frequency is often taken as the objective of optimization.This paper presents an analysis of the influence of PID parameters on frequency oscillation torque and low-frequency oscillation torque using a damped torque method.To suppress the frequency oscillations,adjusting PID parameters was found aggravate low-frequency oscillations in the system,which was verified using a four-machine two-zone system.Finally,a parameter tuning method was developed for hydropower dominant systems that can improve the frequency stability of the systems without deteriorating weakly-damped low-frequency oscillation modes.

关 键 词：水电主导系统 阻尼转矩 频率振荡 低频振荡 PID参数整定方法 

分 类 号：TV734[水利工程—水利水电工程]