向无源网络供电的VSC–HVDC系统仿真研究  

SIMULATION STUDY OF VSC-HVDC SYSTEM CONNECTED TO PASSIVE NETWORK

作　　者：梁海峰[1] 李庚银[1] 李广凯[1] 张凯[1] 周明[1] 

机构地区：[1]华北电力大学电力系统保护与动态安全监控教育部重点实验室,河北省保定市071003

出　　处：《电网技术》2005年第8期45-50,共6页Power System Technology

基　　金：高等学校博士学科点专项科研基金资助项目(20010079001)。~~

摘　　要：通过分析dq0坐标系下电压源换流器(VSC)模型,获知基于VSC的高压直流输电系统(VSC–HVDC)中有功和无功功率可以分别由d轴电流分量和q轴电流分量独立控制的结论,并基于此设计了定直流电压、定交流电压控制器。在建立VSC–HVDC向无源网络输电的Matlab仿真模型的基础上,对定直流电压、定无功功率、定交流电压等控制方式进行了仿真分析。仿真结果表明,建立的VSC–HVDC系统能较好地向无源网络供电,且控制方式灵活、简便,在传输有功功率的同时VSC还可以吞吐无功功率。Through the analysis on voltage source converter (VSC) equations in dq0 coordinate system, the conclusion that the active power and reactive power in VSC based HVDC (VSC-HVDC) system can be independently controlled by d-axis current component and q-axis current component, and constant DC voltage controller and constant AC voltage controller are designed. On the basis of establishing Matlab simulation model for transmitting power to passive network via VSC-HVDC system, the simulation of control modes, such as constant DC voltage control, constant AC voltage control and constant reactive power control, is conducted. Simulation results show that the built VSC-HVDC system can meet the need of supplying power to passive network and the control modes are flexible and simple, moreover VSC-HVDC system can absorb or issue reactive power while it is used to transmit active power.

关 键 词：高压直流输电系统 无源网络 供电 系统仿真 电压源换流器 电力系统 电网 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM743