励磁调节对水力发电机组过渡过程的影响分析

为深入研究励磁调节对水力发电机组过渡过程的影响,在Matlab/Simulink平台上,采用面向对象的程序设计技术,建立了包括水力、机械及电气部分的联合计算模型,研究了机组并入不同容量的电力系统时,励磁调节和电力系统稳定器(PSS)对机组频率波动特性和水力过渡过程的影响。计算结果表明,在有限容量的电力系统中,机组安装励磁调节和PSS除了能有效地对无功功率和电压进行调节之外,对机组频率波动也有良好的改善作用,对调压室水位波动有一定的抑制作用,有利于提高电能质量。

Influence of Excitation Regulation on Transient Process of Hydro-turbine Generator Unit

Aiming at the transient process of hydro-turbine generator unit, a united computational model that contains hydraulic, mechanical and electrical parts was developed with the object-oriented programming technology on Matlab/Simulink software platform. And the impact of excitation regulation and power system stabilizer (PSS) on the frequency oscillation and water transient process of the unit were analyzed in the paper. The results show that the excitation regulation and PSS installed in the unit in finite power grid not only can effectively regulate the reactive power and voltage, but also it has a remarkable effect to damp the frequency oscillation of the generator and reduce the water level fluctuation in the surge chamber, which is beneficial to improve the power quality.