摘要
随着分布式能源的兴起和电力电子技术的发展,相比交流配电网,直流配电网拥有更大的发展潜力。该文首先对直流配电网的拓扑结构、控制方法以及模式切换问题进行了阐述。其次,为了有效解决配网系统中复杂的模式切换问题,简化控制流程和优化潮流控制,文中提出了一种适用于直流配电网的电压控制策略,该策略使各端电压源换流站均具有维持电压和调节功率的能力,其中主站作为功率平衡节点,并为系统提供参考电压。最后,在PSCAD/EMTDC中建立了双端和三端直流配电网结构的仿真模型。通过仿真验证了该直流配电网电压控制策略的有效性。
With the rise of distributed energy and the development of power electronics technology, compared to AC power distribution network, the DC power distribution network has more potential. In this paper, firstly, topological structure, control scheme and mode switch were described and analyzed. Secondly, To effectively solve the complex mode switching problem, simplify control process and optimize power flow control, a suitable voltage control strategy for DC power distribution network was proposed. It made each VSC be able to maintain node voltage and regulate power flow. Among these VSCs, the main VSC, as the node of power balance, provides reference voltage. At last a dual-terminal and a three-terminal structure of DC distribution network simulation model was established on PSCAD/EMTDC. The simulation results indicate the effectiveness of the proposed voltage control strategy for DC power distribution network.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2016年第2期335-341,共7页
Proceedings of the CSEE
基金
国家高技术研究发展计划项目(863计划)(2015AA050103)
江苏省产学研前瞻性联合研究项目(BY2014127-15)~~
关键词
直流配电网
电压控制策略
模式切换
直流潮流
DC distribution network
voltage control strategy
mode switch
DC power flow
