关于电网自动化控制系统辨识与仿真研究
2021-01-12吴爱华
吴爱华




[摘 要] 大型电力系统的出现也只约一百多年的时间。电网系统之所以如此复杂和巨大是由它本身的特点造成的。电能从它的产生、变换、传输、配电、及到用户最终使用都体现它有别于其他系统的整体性。大容量的电能的存贮手段至今为止人类还没有找到,因此就造成了电能从生产到消费的过程基本上是在同一瞬间同时进行的。电网自动化控制系统是保证此过程有效运作的关键因素,系统辨识是保证建模贴近真实性重要一环,也是系统仿真成功的重要基础。
[关键词]电网;自动控制;系统;辨识;仿真
[中图分类号]TM76 [文献标志码]A [文章编号]2095–6487(2021)11–00–03
Research on Identification and Simulation of Power Grid Automation Control System
Wu Ai-hua
[Abstract]The emergence of large-scale power systems is only about a hundred years old. The reason why the grid system is so complicated and huge is caused by its own characteristics. Electric energy from its generation, transformation, transmission, distribution, and final use to users reflects its integrity different from other systems. The storage method of large-capacity electric energy has not been found by human beings so far, so the process of electric energy from production to consumption is basically carried out at the same instant. The power grid automation control system is a key factor to ensure the effective operation of this process. System identification is an important part of ensuring that the modeling is close to the authenticity, and it is also an important foundation for the success of system simulation.
[Keywords]power grid; automatic control; system; identification; simulation
1 電力系统辨识的概念
1.1 电力系统建模的意义
电力系统仿真计算是近年来出现的一门专门技术。随着现代电网规模的不断扩大,电力系统仿真就成了电网稳定运行的基本工具。为此,给电力系统建立模型,是保证电网可以进行仿真计算的先决条件。如果建立模型欠准,在某些不确定的情况下有可能导致结论的改变,甚至会造成一些重要现象被掩盖和忽略。例如,2003年“8·14”美加出现的一些大的停电事故及2006年“11·4”欧盟的大停电事故等,通过对事后事故报告分析表明电力系统仿真使用的模型欠准,不能复原当时发生事故的实情。
建立的模型欠准会引发计算结果和实际情况偏差,会对现代大规模电网造成损害。而所建立的模型对大型的电网的影响是不易事先确定的,或表现“保守”,或表现“冒进”。……
