双馈水轮发电机系统的快速功率响应控制技术

Fast Power Response Control Technology for Doubly-fed Hydro-generator System

该文将快速功率响应控制技术应用到双馈水轮发电机系统中,探究该技术对提升系统有功功率响应速度和保持系统变频恒速运行带来的影响,首先介绍了转子侧励磁电流控制方式和快速功率响应控制策略,随后分析了水轮机非线性模型参数的选取要求与PID控制模式。在此基础上,使用电磁暂态仿真软件PSCAD构建了双馈水轮发电机仿真系统,该系统采用水轮机调节子系统和转子侧励磁子系统的联合控制,并与传统的功率主控法进行了对比。从仿真实验结果来看,使用改进控制方法的水轮发电机系统,有功功率响应时间明显缩短,响应速率提升了50%,可以用更短的时间实现变频恒速运行,达到了设计预期。

This paper applies fast power response control technology to the doubly-fed hydro-generator system to explore the impact of this technology on improving the active power response speed of the system and maintaining the variable-frequency constant-speed operation of the system.Firstly,this paper introduces the rotor-side excitation current control mode and fast power response control strategy,and then analyzes the selection requirements of nonlinear model parameters and PID control modes of hydraulic turbines.On this basis,this paper uses electromagnetic transient simulation software PSCAD to build the simulation system of doubly-fed hydro-generators.The system adopts the hydraulic turbine to regulate the joint control of the subsystem and the rotor-side excitation subsystem,and it is compared with the traditional main power control method.From simulation experiment results,the use of the hydro-generator system that is improved the control method significantly shortens active power response time,increases the response rate by 50%,and can achieve variable-frequency constant-speed operation in a shorter time,which meets design expectations.