水轮发电机组仿真模型的研究

On Simulation Model of Hydropower Generators

在现有的电力系统动态分析软件中,发电机组的仿真模型通常采用隐式梯形积分法将同步发电机、励磁器、调速器、原动机的微分方程差分化,然后消去中间变量,只保留与网络代数方程接口的变量,再与网络代数方程采用牛顿法联立求解的方法.本文提出将同步发电机、励磁器、原动机及其调速器分割求解,形成模块的方法.采用该方法不仅可以建立详细的发电机组模型,而且在程序中可以很方便地调用各元件的详简模型,方便于根据不同要求进行仿真计算.本文采用算例将本程序的运行结果与在PSASP中的运行结果进行了对比,结果非常吻合,说明了该方法的有效性.

This paper proposes a way to develop a simulation model for hydropower generators, The current method is to differentiate the equations of excitation system, speed governor system and synchronous machine by using implicit integration method, manipulation and arrangement, in order to obtain the expressions in terms of the variables id, iq, ud and uq, Then the above simplified differentiated equations, together with network algebraic equations, should be solved by using rigorous method, The method proposed in this paper is how to differentiate the equations of excitation system, how to speed governor system and synchronous machine respectively, how to solve the above three elements＇ equation series separately, This proposed partitioned method modularizes the subsystem of hydro-generators, which was tested, The curves of current, voltage and other variables are compared with those by PSASP and the results are very agreeable.