考虑频率稳定的大停电事故模型及应用  

Blackout Model and Its Application Considering Frequency Stability

作　　者：张振安[1] 郭金鹏[2] 张雪敏[2] 梅生伟[2] 李晓萌[1] 姚锐[2] 

机构地区：[1]国网河南省电力公司电力科学研究院,郑州450052 [2]清华大学电机系电力系统及发电设备控制和仿真国家重点实验室,北京100084

出　　处：《电力系统及其自动化学报》2015年第4期26-32,共7页Proceedings of the CSU-EPSA

基　　金：国家自然科学基金委创新群体项目(51321005);国家自然科学基金项目(51377091);国网河南省电力公司电力科学研究院资助项目

摘　　要：为了分析频率失稳引发的停电风险及其主要影响因素,提出了近似考虑系统频率稳定的大停电事故模型。该模型在改进OPA模型的基础上,采用单机带集中负荷的频率模型计算系统在2 s内的频率跌落,由此判断低频减载基本轮是否动作;采用系统频率静特性计算频率的稳态值,据此启动发电机频率保护和低频减载特殊轮。该模型不依赖于详细的暂态仿真,具有计算速度快的优点。河南电网的仿真结果验证了所提方法对系统频率跌落和稳态值分析的有效性。进一步的分析表明,保证充足且合理的旋转备用分布以及增强系统内薄弱连接可有效降低因为频率失稳而导致的系统停电风险。In order to analysis blackout risk and the main influence factors of it caused by frequency instability, a blackout model is presented to consider the frequency stability of power system approximately.Based on the improved OPA model, this presented model adopts a single machine with concentrated load frequency model to calculate the fre- quency drop of power system in 2 seconds, in order to judge the action of low frequency load shedding devices. Using the system static frequency to calculate the steady state value of frequency, then it starts generator frequency protection and low frequency load shedding special wheels. This model need not detailed simulation and is efficient. The simula- tion results of Henan system verified the validity of the method to analyze the drop of frequency and steady-state fre- quency. Further analysis shows that adequate spinning reserve and sturdy connection can reduce the risk of system outages.

关 键 词：频率稳定 停电模型 河南电网 

分 类 号：TM73[电气工程—电力系统及自动化]