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厂用电系统中一般带有集中电动机负荷,异步电动机启动会引起母线电压严重的波动。系统装设静止无功补偿器(SVC)是有效解决电压质量问题的方法之一。文中采用配有自动电压调节器(AVR)的发电机励磁与系统母线装设SVC的方法,SVC采用闭环控制,研究其对电压稳定和无功补偿的效果。通过对某电厂厂用电系统的仿真计算表明,该方法可提高厂用电电压的水平,并且缩小了异步电动机的启动时间,减少了大型异步电动机启动对系统母线电压的波动和无功功率的冲击。
General power system with centralized motor load plant, induction motor start-up will cause serious fluctuations in bus voltage. The system is equipped with static var compensator (SVC) is an effective solution to voltage quality problems. In this paper, the method of SVC with generator excitation and system bus equipped with automatic voltage regulator (AVR) is adopted. SVC uses closed-loop control to study its effect on voltage stability and reactive power compensation. The simulation results of the power system in a power plant show that the method can increase the voltage of the power plant and reduce the starting time of the asynchronous motor and reduce the fluctuation of the system bus voltage and the reactive power of the large asynchronous motor Impact.