某真实连锁故障下自动电压调节器的调节特性仿真分析与评估  

Simulation analysis and performance evaluation of AVR characteristics in real cascading failure

作　　者：梁浩 谢欢 吴涛 张广韬 訾鹏 张饶 苏为民 LIANG Hao;XIE Huan;WU Tao;ZHANG Guangtao;ZI Peng;ZHANG Rao;SU Weimin(State Grid Jibei Electric Power Co.,Ltd.Research Institute,Beijing 100045,China;North China Branch of State Grid Corporation of China,Beijing 100010,China;Department of Electrical Engineering and Automation,China Three Gorges University,Yichang 443000,China)

机构地区：[1]国网冀北电力有限公司电力科学研究院,北京100045 [2]国家电网公司华北分部,北京100010 [3]三峡大学电气工程及其自动化系,湖北宜昌443000

出　　处：《电力自动化设备》2021年第6期207-212,共6页Electric Power Automation Equipment

基　　金：国家电网公司华北分部科技项目(特高压交直流联合外送的弱送源协调机理研究项目)(520101180050)。

摘　　要：励磁控制系统在连锁故障下改善系统大干扰后的暂态过程、防止电压失稳等方面意义重大。首先介绍了自动电压调节器(AVR)中定子电流限制环节的相关原理与仿真模型;然后分析了一起现场真实连锁故障对周边某机组的影响及其AVR的响应过程,包括多次强励、定子电流限制动作、机端电压过低引起失稳等;最后利用RTDS软件搭建了单机无穷大一次仿真系统及AVR的主、辅控制环节,通过外部故障模拟与AVR调节特性仿真,重点分析了AVR定子电流限制环节及严重故障下发电机自并励励磁方式的特性并提出优化建议。It is of great significance for excitation control system to improve the transient process and pre⁃vent voltage instability under the condition of cascading failure.The principle and simulation model of SCL(Stator Current Limit)loop of AVR(Automatic Voltage Regulator)are introduced,and the influence of a real field cascading failure on an adjacent generator unit and the response process of its AVR are analyzed,including multiple force excitation,SCL action,instability caused by low terminal voltage,etc.On this basis,the RTDS(Real Time Digital Simulator)is used to build the one-machine infinite-bus primary system and the main and auxiliary control loops of AVR.Through the simulation of external faults and AVR regulating characteristics,the SCL loop of AVR and the characteristics of self-shunt excitation mode of generator under serious faults are analyzed emphatically and the optimization suggestion is proposed.

关 键 词：连锁故障 自动电压调节器 实时数字仿真 电压稳定 定子电流限制 

分 类 号：TM761[电气工程—电力系统及自动化]