同步发电机原动系统调速器仿真研究

Simulation Study of Prime Mover Governor of Synchronous Generator

针对同步发电机原动机系统仿真器模拟控制方法的弱点,研究以数字化调速器取代模拟调速器。建立了原动机系统调速器的通用数学模型,并进行离散化处理;通过编程技巧解决计算结果的溢出与精度等问题。在电力系统动态模拟试验室进行了原动机系统仿真器的静态和动态特性试验,检测出模拟参数调差系数、油动机时间常数和汽惯性时间常数在不同取值条件下,机组转速动态过程的时间、超调量、最大振幅时间、震荡次数及稳态转速变化率等特征值。试验结果与数据及动态特性规律证明了该仿真系统与原型一致,较好地实现了对实际调速器的动态仿真。

To address the weakness of the analogue control technology in prime mover simulation system, this paper proposed replacing the analogue governor with the digitized governor. The paper had not only set up general mathematics model of prime move governor, but also presented discretization, and finally with skillful programming solved the questions of calculated result overflow and precision. The experiment about static and dynamic characteristic of prime mover simulation system, which detected the time of unit rotational speed dynamic process, the value of surpasses adjustment, the max time of amplitude, the times of oscillation and the rate of stable state rotational speed change under different 8, Ts and To, was carried out in power system dynamic simulation laboratory. The experimental results and dynamic characteristic laws both prove that the simulation system is coincide with its prototype and accomplishes dynamic simulation to actual governor successfully.