多馈入直流输电系统的辅助频率协调控制  

Auxiliary Frequency Coordinated Control for Multi-infeed HVDC Systems

作　　者：张振[1] 李兴源[1] 

机构地区：[1]四川大学电气信息学院,四川成都610065

出　　处：《现代电力》2009年第1期45-48,共4页Modern Electric Power

基　　金：国家自然科学基金资助项目(50595412);国家重点基础研究专项经费资助项目(2004CB217907);国家科技支撑计划资助项目(2008BAA13B01)

摘　　要：在高压直流(HVDC)输电系统上加装辅助频率控制器具有显著的经济效益。首先阐述了HVDC功率调制的基本原理及辅助频率控制的实现方法,然后提出了一种基于PID控制的多回HVDC辅助频率协调控制器。采用一个3机2直流系统对该控制器进行了时域仿真计算。仿真结果表明,加装了辅助频率协调控制器的多回HVDC系统能在任一回HVDC输电线路两侧交流系统发生大扰动时,实现两侧系统间功率的相互紧急支援,显著改善了两侧交流系统频率特性。A HVDC link with an auxiliary frequency controller has many advantages in technical and economic aspects. The basic principle of HVDC power modulation and the implementation method of auxiliary frequency control are introduced. A novel auxiliary frequency coordinated controller based on PID control method is provided for the application to multi-circuit HVDC links. The digital simulation of a three machines and two HVDC links system is implemented. Simulation results show that the proposed controller can effectively improve the frequency quality of AC power systems on both sides of any HVDC links once a large load disturbance occurs.

关 键 词：高压直流 直流功率调制 辅助频率协调控制 PID控制 

分 类 号：TM726.1[电气工程—电力系统及自动化]