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1.哈尔滨工业大学(威海)新能源学院,山东省威海市 264200
2.国网山西省电力公司电力科学研究院,山西省太原市 030000
于国星(1992—),男,博士研究生,主要研究方向:微电网控制、直流输电控制与保护。E-mail:yuguoxing2014@sina.com
宋蕙慧(1983—),女,博士,副教授,主要研究方向:微电网与智能电网及新能源控制。E-mail: songhh@hitwh.edu.cn
侯睿(1984—),男,博士,讲师,主要研究方向:混合储能控制、无线充电。E-mail:houruihit@163.com
曲延滨(1961—),男,通信作者,博士,教授,博士生导师,主要研究方向:新能源发电与并网、无线充电。E-mail:quyanbin@hit.edu.cn
收稿日期:2020-01-16,
修回日期:2020-05-27,
网络出版日期:2020-06-24,
纸质出版日期:2020-10-25
移动端阅览
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YU Guoxing,SONG Huihui,HOU Rui,et al.Distributed Cooperative Frequency Control for Flexible DC Interconnected Island Microgrid Cluster[J].Automation of Electric Power Systems,2020,44(20):103-111.
于国星,宋蕙慧,侯睿等.柔性直流互联孤岛微网群的分布式频率协同控制[J].电力系统自动化,2020,44(20):103-111. DOI: 10.7500/AEPS20200116011.
YU Guoxing,SONG Huihui,HOU Rui,et al.Distributed Cooperative Frequency Control for Flexible DC Interconnected Island Microgrid Cluster[J].Automation of Electric Power Systems,2020,44(20):103-111. DOI: 10.7500/AEPS20200116011.
柔性直流输电是解决多个微网集成聚合问题的最佳选择之一,但传统控制下,直流输电会导致微网间频率解耦,使微网间无法形成频率支撑。为此,以一致性理论为基础,提出一种全新的分布式频率控制结构,并设计了与之匹配的协同控制策略。在该策略中,通过微网间的接口换流站来实现微网间频率调控目标,并利用微网内分布式单元间的协作解决微网内频率恢复、备用容量精确分配等调控问题。控制策略在系统中的稳定性通过Lyapunov直接法进行了论证。最后,通过仿真验证了所提策略的有效性和“即插即用”性能。
Flexible DC transmission is one of the best choices for solving the integration and aggregation problem of multiple microgrids. However
under the traditional control
DC transmission will cause frequency decoupling among microgrids
which makes them unable to form frequency support with each other. To solve this issue
based on the consistency theory
a new distributed frequency control structure is proposed. Then
a coordinated control strategy matching with the structure is designed. In this strategy
through the cooperation of interface converter stations
the objectives of frequency regulation among microgrids can be achieved. Meanwhile
with the cooperation between distributed generators in microgrids
the issues such as frequency restoration and accurate allocation of reserve capacity are effectively solved. The stability of the proposed control strategy in the system is demonstrated by the Lyapunov direct method. Finally
the simulation verifies the effectiveness and “plug and play” performance of the proposed strategy.
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