云广直流孤岛运行机网控制特性实时仿真平台研发及其应用

摘要

To study the unit-grid control performance of Yunnan Guangdong DC system,a new close-loop simulation platform for its islanded operation is developed in this paper in a way to build model for the control system on sending side as well as to connect the control systems of excitation,governor and mornitoring to RTDS and the protection-control system of the DC system.The control logic and parameters of the unit excitation and gorverner are identified,and furthermore their RTDS pure digital models are established.The comparison of the pure digital model and the actual controler,and the comparison between the results from the simulation platform and the site test are carried out,showing that the response characteristic and control performance of the developed simulation platform are in high consistency with that of the real islanded mode of the DC system.%为了研究云广直流孤岛运行的机网控制特性,对送端机组的控制系统进行建模,将送端机组的励磁、调速和监控等控制系统接入RTDS仿真系统以及直流系统的控制保护系统和安稳系统,研发了一个新的云广直流孤岛运行闭环仿真平台。基于该平台对送端机组的调速、励磁控制器的逻辑和参数进行了辨识,进而搭建了调速、励磁系统的RTDS数字控制模型。纯数字控制模型与实际控制器的仿真对比,以及孤岛实时仿真结果与现场试验结果的对比表明,所建立的仿真平台与实际孤岛在响应特性和控制性能上具有很高的一致性。