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 super-critical 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 relation-ship between the relative percentage of faulted critical clearing time and reciprocal of faulted short-circuit capacity.
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