摘要
交直流混合微网综合了交流微网和直流微网的优势,为高密度分布式能源接入配电网提供了新的有效途径。交直流混合微网中交直潮流断面由多台AC/DC双向换流器构成,在维持交流区和直流区的功率动态平衡、交流侧频率和直流侧电压恒定等方面起着关键作用。针对多台AC/DC双向换流器的并联运行,基于变步长自适应逆控制理论,提出了一种多台AC/DC双向换流器的分散协调控制方法。该方法兼具了下垂控制与自适应逆控制的优势,既可以使各双向换流器按照额定容量进行有功功率的协调分配,又可以实现对直流母线电压或交流区频率的零误差调节,并获得相较于自适应逆控制更优的动态响应。最后,结合国内首个商业化运营的交直流混合微网示范工程进行仿真实验,验证了所提控制方法的正确性和可行性。
The AC/DC hybrid microgrid combines the advantages of AC microgrid and DC microgrid, and provides a more effective way for high-density distributed energy accessing to distribution network. The AC/DC power interface of hybrid microgrid, which is composed of multiple parallel AC/DC converters, plays a key role in maintaining the power dynamic balance of the AC and DC areas and the constant of AC side frequency and DC side voltage. For the parallel operation of multiple AC/DC converters based on the theory of adaptive inverse control with variable step size, this paper presents a decentralized coordinated control method for AC/DC converters. This method combines the advantages of droop control and adaptive inverse control. It can not only make the AC/DC converters distribute the active power in accordance with the rated capacity, but also can realize zero-error adjustment of the DC bus voltage or the AC area frequency, and obtain a better dynamic response than traditional adaptive inverse control. Finally, combined with the demonstration project of the first commercial AC/DC hybrid microgrid in China, the correctness and feasibility of the proposed control method are verified by the simulation experiment.
作者
李鹏
连攀杰
陈安伟
李闻
李鑫明
汪乐天
LI Peng;LIAN Panjie;CHEN Anwei;LI Wen;LI Xinming;WANG Letian(School of Electrical and Electronic Engineering,North China Electric Power University,Baoding 071003,China;State Grid Zhejiang Electric Power Co.I.td.,Hangzhou 310007,China)
出处
《电力系统自动化》
EI
CSCD
北大核心
2018年第22期151-158,共8页
Automation of Electric Power Systems
基金
国家自然科学基金资助项目(51577068)
国家高技术研究发展计划(863计划)资助项目(2015AA050104)~~
作者简介
李鹏（1965-），男，教授，博士生导师，IEEE Senior Member，主要研究方向：新能源并网发电与微网技术、电能质量分析与控制、主动配电网优化运行与协调控制。Email：ncepulp@ncepu．edu．cn;连攀杰（1994-），男，通信作者，硕士研究生，主要研究方向：新能源并网发电与微网技术。E—mail：1225601442@qq．com;陈安伟（1966-），男，博士，教授级高级工程师，主要研究方向：电力系统稳定及微电网。E—mail：chen_anwei@zj．sgcc．com．cn
