摘要
研究电力系统频率动态过程的重要手段是基于数值仿真的方法,但多次事故后仿真复现表明,采用现有的模型及参数无法准确描述实际电力系统的频率动态过程,仿真结果与实测轨迹之间存在明显偏差。文章首先基于WSCC系统,分析不同参数对频率动态过程的影响趋势,并基于东北电网网架结构和实测数据,在复杂多机系统中验证从WSCC系统得出的不同参数物理特性结论。基于实测轨迹并参考参数的物理特性结论校核频率动态过程仿真模型和参数,提高频率动态过程的仿真精度,对于整定低频减载方案,克服以往保守的运行方式等方面提供有效依据。
Although numerical simulation is an important method in researching dynamic frequency process,obvious deviations between the numerical simulation and the measured trajectory have been found based on the simulation reproduction in many accidents. And the existing simulation model and parameters cannot describe the actual dynamic process of frequency accurately. Researches are carried out on the influence of four parameters to the dynamic frequency process,which are based on the WSCC system. The four parameters include the inertia constant of generator,generator frequency coefficient,dead band and turbine intermediate superheating coefficient. Northeast China power grid and measured data are adopted to verify the above research conclusion. Checking the dynamic frequency process simulation model and parameters will improve the accuracy of dynamic frequency process simulation on the basis of the measured trajectory and the physical characteristics of the parameters. It can also give efficient foundation for the setting work of UFLS to overcome the previous conservative operation mode.
出处
《电测与仪表》
北大核心
2014年第19期46-52,共7页
Electrical Measurement & Instrumentation
基金
东北电网有限公司项目(SYZX-09007-11)
吉林市科技发展计划项目(201162503)
关键词
实测轨迹
数值仿真
频率动态
参数调整
电力系统
measured trajectory
numerical simulation
dynamic frequency
parameter regulation
power system
