大区域电网动态频率空间分布特性分析

The Research of Space Property of Large Area Power Grid Dynamic Frequency

频率是电力系统重要的运行参数,也是衡量电能质量的重要指标。系统频率保持额定值是系统有功功率供需平衡和系统正常运行的标志。当发电机组跳闸或大容量负荷投切造成功率不平衡时,频率发生变化继而发生频率动态过程。鉴于频率动态过程研究的重要性,本文对某大区域互联电网频率的动态过程进行了仿真,主要从不同电压等级的频率动态过程差异,同一功率脱落事件在不同位置观测的频率动态过程,相同功率脱落、不同脱落方式在同一点观测三个方面对其频率动态空间分布特性做了仿真研究,为低频减载装置的正确整定和配置提供依据。

frequency is the important operational factor and target of measure power quality in power system. Keeping rating of system frequency is the co-ordination of supply and demand of high eapactive power and the mark of normal operation. When the electric generating set tripping or putting into or cutting off high capacity load to cause load disequilibrium, frequency happens to change then happens to frequency dynamic process. In view of the importance of researching frequency dynamic process, this paper studies a large area of interconnected power grid frequency of dynamic process simulation, mainly from different voltage grade difference frequency of dynamic process;The same power off events in different locations of the dynamic process of frequency observation, The same power off, different ways in the same points off three aspects of its frequency observation of dynamic space distribution characteristics do simulation. It provides the bases for UFLS correct setting and deploy.