柔性直流输电系统异同步自动控制策略  

Asynchronous Automatic Control Strategy for MMC-HVDC System

作　　者：彭发喜 黄伟煌 许树楷 李岩 郭铸 刘涛 PENG Faxi;HUANG Weihuang;XU Shukai;LI Yan;GUO Zhu;LIU Tao(State Key Laboratory of HVDC,Electric Power Research Institute,CSG,Guangzhou 510663,China)

机构地区：[1]直流输电技术国家重点实验室(南方电网科学研究院),广州510663

出　　处：《南方电网技术》2023年第3期20-26,共7页Southern Power System Technology

基　　金：广东省重点领域开发计划资助项目“粤港澳大湾区智慧电力柔性互联关键技术研究”(2019B111109001);国家重点研发计划(2016YFB0901004)。

摘　　要：柔性直流传统的定有功功率控制模式依赖于调度运行人员下达调度控制指令,无法根据交流系统运行状态变化自动调整传输功率。参考交流输电线路的功率传输特性设计了柔性直流输电系统的新型异同步自动控制策略,使柔性直流能够自动调整传输功率,实现了模拟交流联络线的功能。首先论述了异同步自动控制策略的基本原理、虚拟阻抗取值方法和功能投退方案,然后基于实际柔性直流工程的控制保护装置和实时仿真试验系统,搭建了基于实际交流大电网的仿真模型,最后对所提异同步自动控制策略的有效性和可行性进行了验证。The constant active power control mode of MMC-HVDC system is based on the power order sent by dispatching operators,and cannot adjust the transmission power according to the status of AC system.According to the characteristics of power transmission in AC lines,an asynchronous automatic control strategy for MMC-HVDC system is designed,which enables the MMC-HVDC system to automatically adjust the transmission power and realizes the function of simulating AC tie lines.The basic principles of asynchronous automatic control strategy,the detailed value-taking method of virtual impedance,and the scheme of function on/off are elaborated.Then,the simulation model based on actual AC power network is built on RTDS platform according to the control and protection devices of practical MMC-HVDC project.Finally,the effectiveness and feasibility of the proposed control strategy is verified.

关 键 词：柔性直流输电 异同步 控制策略 实时仿真 

分 类 号：TM721.[电气工程—电力系统及自动化]