基于FPGA的柔性直流实时仿真技术及试验系统

未来柔性直流输电技术大容量、高电压、远距离的发展趋势,对现有的柔性直流仿真建模技术提出了更高的要求。为了建立更符合控制保护装置测试需求的大容量、高电压、远距离柔性直流实时仿真模型,提出了适用于各种子模块拓扑结构且能灵活定义模块级故障的模块化多电平换流器(MMC)等效建模方法,采用基于现场可编程门阵列(FPGA)技术实现灵活柔性直流换流器算法,通过双向高速通信板卡GTFPGA在实时数字仿真器(RTDS)中实现灵活自定义的柔性直流MMC仿真建模,为未来含新型子模块拓扑结构的大容量、高电压、远距离柔性直流工程的控制保护特性研究及其闭环试验,提供有效的实时仿真试验系统和重要的仿真技术支持。

FPGA Based Real-time Simulation Technology and Test System of Flexible DC

With the developing trend towards large capacity, high voltage and long distance for flexible DC technology, challenge and higher requirements are put forward for the existing flexible DC real-time simulation technology. In order to meet the control and protection testing requirement for the large capacity, high voltage and long distance flexible DC system, a new simulation method is proposed. Firstly, the equivalent modeling method of modular multilevel converter(MMC)suitable for variable sub-module topology and module level fault is developed. Then the modeling algorithm is realized based on the field programmable gate array(FPGA). The FPGA carries on communication with Thevenin equivalent circuit in real-time digital simulator(RTDS)through GTFPGA. Thus, a flexible and user defined flexible DC model is built in RTDS. The model developed using FPGA technology provides an effective way to research control and protection characteristics for the large capacity, high voltage and long distance flexible DC system. And it provides an effective real-time simulation test system and important simulation technology support. This work is supported by China Southern Power Grid Company Limited(No. CSGTRC-K142031).