基于RTDS和FPGA联合仿真平台的多速率实时仿真方法

摘要

For the realization of real-time simulation of power system with distributed generations,this paper studies a multi-rate real-time simulation method based on the real-time digital system(RTDS)and field programmable gate array(FPGA)co-simulation platform.The power network is divided by the partial latency insertion method,and multi-rate interaction of interface electric parameters is implemented by the fitting method and the extrapolation method.In order to reduce the influence of communication delay on simulation accuracy,a method of asynchronous interaction of interface electric parameters which enables FPGA”s data to be transmitted prior to RTDS”s data is proposed.An IEEE-5 power system containing two photovoltaic generations is simulated in real-time on the RTDS and FPGA co-simulation platform with a 50 μs/1 μs hybrid simulation step,the result of which is compared with the simulation data of PSCAD platform,and the feasibility of the proposed co-simulation platform and accuracy of the real-time simulation method are verified.%为实现含分布式电源的电力系统实时仿真，研究了一种基于实时数字仿真器(RTDS)和现场可编程门阵列(FPGA)联合仿真平台的多速率实时仿真方法。采用局部延迟插入方法分解电力系统网络，并利用拟合法和外插法实施并行多速率接口电气量交互。为减小通信延时对仿真精度的影响，提出了一种 FPGA 数据发送适当早于 RTDS 数据发送的接口电气量异步交互方法。在RTDS和FPGA联合仿真平台上以50μs/1μs 混合仿真步长实时仿真了一个含2个光伏发电的IEEE 5节点电力系统，并与PSCAD平台下的仿真数据进行对比，验证了所提联合仿真平台的可行性和实时仿真方法的准确性。