水电站水机电系统仿真建模及动态特性分析

为探究多种扰动下水电站水机电系统动态响应特性,基于MatLab/Simulink软件提供的用户自定义建模功能,建立了水电站水机电系统主要环节的Simulink仿真模块,根据系统的接线结构及运行特性,最终搭建出完整的水电站水机电系统动态仿真模型。在此基础上,针对孤网与联网运行方式下水电站水机电系统受扰动后的动态特性进行了仿真分析,所涉及的扰动形式包括负荷扰动、功率调节扰动、短路故障扰动等。仿真结果表明,所建立的动态仿真模型能准确描述系统受扰动后的动态响应,从而为探讨水电站水机电耦合作用机理及控制器的参数整定提供了可靠的仿真平台。

Modeling the Dynamic Performance of Hydraulic-Mechanical-Electrical System in Hydropower Station

In order to investigate into the dynamic response of hydraulic-mechanical-electrical system (HMES) in hydropower station under disturbance, we established the Simulink models of main parts of HMES by the user-defined modeling function of MatLab/Simulink software, and further built a complete dynamic simulation model of the HMES in line with its basic structure and operating characteristics. By using the model, we simulated the dynamic response of HMES in isolated and grid-connected operation modes under various disturbances including load disturbance, power regulation disturbance, and short-circuit fault disturbance. The simulation results show that the proposed model could describe the dynamic responses of HMES under disturbances accurately. The model can be taken as a reliable simulation platform for studying the coupling mechanism of HMES and tuning of controller parameters.