华中-华东多回HVDC辅助功率/频率控制  

Study on the Auxiliary Power/Requency Control of Center China to East China to East China Multi-circuit HVDC Links

作　　者：余涛[1] 沈善德[2] 

机构地区：[1]华南理工大学电力学院,广东省广州市510640 [2]清华大学电机系,北京市100084

出　　处：《电力系统自动化》2005年第1期77-82,共6页Automation of Electric Power Systems

基　　金：家自然科学基金重点资助项目(50337010)国家电力调度通信中心科研项目(SP(2002)18124)华南理工大学自然科学基金资助项目(323-E5040220)。

摘　　要：在华中-华东多回高压直流(HVDC)输电系统上加装辅助功率/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,然后给出了常规辅助功率/频率控制方案,并通过大规模数字仿真和动模试验验证了该方案的可行性。研究结果显示,加装了辅助功率/频率控制器的华中-华东多回HVDC系统能在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,显著改善两侧交流系统频率,并可在多回直流输电线路中实现功率的平稳转移,明显提高了整个华中、华东交直流系统的安全性和经济性。A HVDC link with an auxiliary power/frequency controller has many advantages in both technical and economic aspects. Firstly, the basic principle of HVDC power modulation is introduced in the paper. Secondly, a novel PID controller is provided for the application on the Center China to East China multi-circuit HVDC links. Finally, dynamic simulation experiment and digital simulation are implemented. Study results illustrate that proposed controller can effectively enhance the frequency quality of ac power systems on both sides of HVDC links once a large load disturbance occurs. In addition, it helps the rapid transferring of DC power from the malfunctioned HVDC link to other normal links.

关 键 词：高压直流 频率控制 直流功率调制 三峡电站 

分 类 号：TM72[电气工程—电力系统及自动化]