多端柔性直流输电系统直流电压模糊控制策略  

Research of DC Voltage Fuzzy Control Strategy for VSC-MTDC Systems

作　　者：刘志江[1] 夏成军[1] 杜兆斌[1] 

机构地区：[1]华南理工大学电力学院,广东广州510641

出　　处：《电力工程技术》2017年第2期21-26,87,共7页Electric Power Engineering Technology

基　　金：国家自然科学基金(51577071);广东省自然科学资金(2015A030313202)

摘　　要：直流电压斜率控制适用于潮流经常变化的多端柔性直流输电系统,但现有的直流电压斜率控制不能很好地兼顾不同运行工况对斜率参数的要求。文中提出一种基于模糊控制的直流电压变斜率控制策略。该控制策略应用模糊控制理论,把常规的直流电压斜率控制由原来难以整定参数的固定斜率控制变为控制参数根据运行工况变化的变斜率控制。在PSCAD/EMTDC仿真平台上搭建四端柔性直流输电系统模型,并与MATLAB互联仿真。仿真结果验证了文中设计的直流电压模糊控制策略能有效维持系统稳定运行和加快系统故障恢复。The DC voltage droop control strategy is often used for the voltage source converter based muIti-terminal HYDC which power flow is changed frequently. But the existing DC voltage droop control can not meet the requirements of different operating conditions on the droop parameters. This paper presents a DC voltage droop control strategy based on fuzzy control. By using the fuzzy control theory, the conventional DC voltage droop control strategy is converted to the variable droop control which is changed according to operating conditions. Finally, a four terminal YSC-HYDC is built and simulated in PSCAD/EMTDC which is connected with Matlab. The simulation results demonstrate that the DC voltage fuzzy control strategy can maintain the stability of the system and accelerate system’s recovery speed effectively.

关 键 词：柔性直流输电 多端柔性直流输电 直流电压控制 直流电压斜率控制 模糊控制 

分 类 号：TM721.1[电气工程—电力系统及自动化]