大型同步发电机故障灭磁仿真  

De-excitation Simulation of Large Synchronous Generator at Fault

作　　者：王兴贵[1] 方振乾[1] 智勇[2] 

机构地区：[1]兰州理工大学,兰州730050 [2]甘肃电力科学研究院,兰州730050

出　　处：《大电机技术》2008年第6期59-63,共5页Large Electric Machine and Hydraulic Turbine

摘　　要：本文对大型同步发电机故障状态下的线性和非线性电阻灭磁进行了仿真计算。其仿真模型考虑了转子阻尼绕组的感应作用和发电机空载特性的非线性,并利用积分算子1/s实现了灭磁微分方程的求解和磁能的计算,以期对电阻的灭磁性能进行更直观的分析。给出了某一300WM汽轮发电机故障灭磁的Matlab仿真结果,其较好地再现了发电机的灭磁过程,获得了灭磁电阻性能的对比结果。The paper described the simulation for de-excitation of large synchronous generator at fault with linear and non-linear resistor. The simulation model considers the induction effect of rotor damper winding and the nonlinearity of no-load characteristic of generator and uses integral operator 1/s to solve differential equation and calculate magnetic field energy, to give more specific analysis on de-excitation capability of resistor. The de-excitation simulation results for a 300MW turbine generator were given and showed vividly the dynamic processes of de-excitation. Finally, the contrast results of de-excitation resistor capability were gained.

关 键 词：同步发电机 灭磁 阻尼绕组 非线性电阻 仿真 

分 类 号：TM301.2[电气工程—电机]