摘要
多端直流系统中直流电压的稳定是整个系统的核心,需要各个换流站之间协调控制,共同维持整个直流电网的稳定运行,目前直流电压协调控制策略主要分为有通信和无通信两大控制策略。针对基于模块化多电平换流器型多端直流输电系统(MMC-MTDC),在介绍MMC的基本运行原理的基础上,论述了MTDC系统中两大系统协调控制策略,重点分析并设计了无通信类的3种控制器;旨在对现有的MTDC直流电压协调控制策略做出一个总结,为后续MTDC控制策略的研究提供技术参考;最后通过一个五端MMC-MTDC仿真模型验证和对比不同直流电压协调控制器的性能优缺点。
DC voltage stability is the most important issue of multi-terminal direct current（MTDC）, which demands coordinated control of each converter station to maintain the stability of the DC power grid in operation. At present the DC voltage coordination control strategy consist of two kinds of control strategy with communication and non-communication. This paper, firstly discussed the system coordinated control strategy of MMC-MTDC based on the basic operation principle of modular multilevel converter（MMC）, and then it focused on research and design of the three non-communication controller. Finally, a five terminal MMC-MTDC simulation model was built to verify and conduct comparison between the different dc-voltage coordinated controllers.
出处
《华东交通大学学报》
2016年第3期99-105,共7页
Journal of East China Jiaotong University
基金
国家自然科学基金项目(51367008)
关键词
多端直流输电
模块化多电平换流器
直流电压
协调控制
无通信控制策略
multi-terminal direct current（MTDC）
modular multilevel converter（MMC）
DC voltage
coordinated control
non-communication control strategy
