抑制火电机组超低频振荡的一次调频建模及仿真  

Modeling and Simulation of Primary Frequency Modulation for Suppressing Ultra-low Frequency Oscillation of Thermal Power Units

作　　者：张顺 李生鹏 姚洪宇 柏建华 曹士保 ZHANG Shun;LI Shengpeng;YAO Hongyu;PA Jianghu;CAO Shibao(Electric Power Research Institute of Guowang Gansu Electric Power Company,Lanzhou 730050,China;Lanzhou Longneng Electric Power Technology Co.,Ltd.,Lanzhou 730070,China)

机构地区：[1]国网甘肃省电力公司电力科学研究院,兰州730050 [2]兰州陇能电力科技有限公司,兰州730070

出　　处：《自动化与仪器仪表》2024年第9期177-180,185,共5页Automation & Instrumentation

基　　金：甘肃省电力公司2023年省管产业单位重点研发计划(SGCY2023011);甘肃省科技厅2022年技术创新引导计划(22CX3GA017)。

摘　　要：近年来,火电机组因调速系统稳定性变差引发超低频振荡现象时有发生,对电网的安全稳定运行带来较大影响。文章基于这一背景,通过分析某电网发生的超低频振荡案例,研究火电机组超振荡现象与调速系统中一次调频动作之间的关联性,设计一种能够高度识别低频振荡发生甄别策略,以及基于广义滤波的一次调频优化控制策略。建模仿真及优化应用结果表明,该方案既能够有效抑制因机组调速系统不稳定引发的超低频振荡事件的发生,又能够显著提升调频动作积分电量,从而提高电力系统的本质安全。In recent years,ultra-low frequency oscillation of thermal power units has occurred from time to time due to the stability of speed regulation system,which has a great impact on the safe and stable operation of power grid.Based on this background and a case of ultra-low frequency oscillation occurring in a power grid,this paper analyzes the correlation between oscillation phenomenon and the one-time frequency modulation action of the speed regulation system.Through modeling and simulation,a screening strategy that can highly identify the occurrence of low-frequency oscillation and a primary frequency modulation optimization control strategy based on generalized filtering are developed,so as to effectively suppress the occurrence of low-frequency oscillation events in thermal power units.Improve the intrinsic safety of the power system.

关 键 词：火电机组 超低频振荡 一次调频 建模仿真 

分 类 号：TM621[电气工程—电力系统及自动化] TP29[自动化与计算机技术—检测技术与自动化装置]