超临界机组调门快关提升暂态稳定性影响因素分析  

Analysis on Influence Factors of Fast Valving of Control Valve of Supercritical Unit on Promoting Transient Stability

作　　者：邓彤天 钟晶亮 邱一苇 吴浩[2] 陈传识 李蔚[4] DENG Tongtian;ZHONG Jingliang;QIU Yiwei;WU Hao;CHEN Chuanshi;LI Wei(,Electrical Power Research Institute of Guizhou Power Grid Co.,Ltd.,Guiyang,Guizhou 550002,China;College of Electrical Engineering,Zhejiang University,Hangzhou,Zhejiang 310027,China;State Grid Zhejiang Electric Power Company Wenzhou Power Supply Company,Wenzhou,Zhejiang 325000,China;College of Energy Engineering,Zhejiang University,Hangzhou, Zhejiang 310027, China)

机构地区：[1]贵州电网有限责任公司电力科学研究院,贵州贵阳550002 [2]浙江大学电气工程学院,浙江杭州310027 [3]国网浙江省电力公司温州供电公司,浙江温州325000 [4]浙江大学能源工程学院,浙江杭州310027

出　　处：《广东电力》2018年第5期74-79,共6页Guangdong Electric Power

基　　金：贵州电网有限责任公司科技项目(GZDJY-16-03-11)

摘　　要：为定量分析电气侧系统参数和运行工况对调门快关作用效果的影响,以及为超临界机组快关功能整定优化提供理论依据,提升机组与电网的运行可靠性和安全性,基于PSCAD/EMTDC仿真平台,以贵州兴义电厂1号机组为研究对象,建立包含汽轮机、发电机、励磁系统和等值电网在内的"源-网"联合仿真模型;仿真计算不同影响因素下的故障临界切除时间,以之作为暂态功角稳定性指标,分析并总结了发电厂送出线路长度、发电机有功与无功出力、短路故障类型与快关动作延时等因素对提升暂态稳定性作用效果的影响。综合分析各影响后得出:快关提升故障临界清除时间的相对数与故障短路容量的倒数间存在较好的线性回归关系。In order to quantitatively analyze influences of system parameters at the electrical side and operating conditions on fast valving function of the control valve and provide theoretical basis for optimization on fast valving setting of the supercritical unit as well as promote operation reliability and safety of the power grid,the paper dose research on No.1 unit in Guizhou Xingyi power plant and builds a source-grid hybrid simulation model including steam turbine,generator,excitation system and equivalent power grid on the basis of PSCAD/EMTDC simulation platform.It calculates faulted critical clearing time which is taken as the transient angle stability index by simulation under different influence factors and analyzes impacts of transmission line length,active power output and reactive power output of the generator,short circuit fault types,delay of fast valving on promoting transient stability.It finally draws a conclusion that there is a better linear regression relationship between the relative percentage of faulted critical clearing time and reciprocal of faulted short-circuit capacity.

关 键 词：调门快关 暂态功角稳定 超临界机组 数值仿真 PSCAD/EMTDC 

分 类 号：TM712[电气工程—电力系统及自动化]