柔性直流配电网的RTDS仿真试验研究

RTDS Simulation Research on VSC-based DC Distribution Network

柔性直流技术是实现安全、可靠、高质量配电网的理想方案,也是对现有配电网升级改造的有效途径。以杭州大江东直流配电网示范工程为背景,详细介绍了直流配电网的RTDS(实时数字仿真器)数字仿真试验模型,包括系统整体建模、MMC(模块化多电平换流器)阀组以及直流断路器等直流配电网关键设备的建模。介绍了仿真试验系统的连接方式,通过仿真结果说明其有效性,该系统可为直流配电网控制保护系统的产品研发、策略验证、工程出厂试验提供一个良好的检测平台。

VSC-HVDC,as an ideal plan for distribution network of security,reliability and high quality,can upgrade and renovate the existing distribution network.Under the context of Dajiangdong DC distribution network pilot project,the paper expounds RTDS(real-time digital simulator)model of VSC-based DC distribution network,including holistic modeling and modeling of MMC(modular multilevel converter)valves and DC breakers;besides,it introduces connection mode of simulation test system and verifies the effectiveness of the test method via simulation result.The RTDS simulation test system can provide a good testing platform for product research,strategy verification and factory tests of the control and protection system of VSC-based DC distribution network.