感应风力发电机组基于优化的稳态分析法

Optimization-based Steady State Analysis of Wind Driven Induction Generator

由于感应发电机对原动机转速无严格要求 ,所以在风力发电系统中得到广泛应用。但其励磁电流需由电枢电流支持 ,运行参量之间的关系很复杂 ,特别是当感应发电机 (组 )不与电力系统并联时 ,其频率和电压不被固定 ,需由多个关系式 (其中包括一些非线性关系式 )制约 ,求解很困难。为此 ,介绍了一种感应发电机 (组 )运行特性的稳态分析法 ,应用MATLAB5 3的最优化工具箱中提供的多元方程求解函数fsolve()求解非线性方程组 ,从而得到多台感应发电机并联运行时的电压、频率和其他运行参数。计算结果表明了该方法的可行性。

Because of no critic requirement of prime mover speed,induction generator is widely used in wind driven generation system,but its exciting current must be supported by amature current,the relation between operation parameters are complex,especially when generator(s) is not parallel to power system,its frequency and terminal voltage are not fixed,it need be determinded by solving several equations including some nonlinear equations,solving of which is difficult.A steady state analyse method of parallel generators is introduced,by using plural equation soluable function fsolve( ) supplied by optimum toolbox of MATLAB5.3,the voltage,frequency and other operation parameters parallel generators are obtained.The effectiveness of this method is proved by calculation results.