Remote Multinodal Voltage Unbalance Compensation in Islanded AC Microgrids

被引:1
|
作者
Duarte, Josue [1 ]
Velasco, Manel [1 ]
Marti, Pau [1 ]
Borrell, Angel [2 ]
Castilla, Miguel [3 ]
机构
[1] Tech Univ Catalonia, Dept Automat Control, Barcelona 08028, Spain
[2] Escola Univ Salesiana Sarria, Dept Elect Engn, Barcelona 08017, Spain
[3] Tech Univ Catalonia, Dept Elect Engn, Vilanova I La Geltru 08800, Spain
关键词
Power quality; three-phase inverter; voltage unbalance compensation; CONTROL STRATEGY; POWER QUALITY; SYSTEMS;
D O I
10.1109/TPEL.2023.3340093
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Microgrids (MGs) are exposed to voltage quality deterioration due to the presence of voltage unbalance. To deal with this problem, existing solutions based on distributed generation (DG) units interfaced by power electronics offer two type of strategies for voltage unbalance compensation depending on whether the compensation is performed at one remote node or at multiple local nodes. The first type is limited to a single node, and the second type is limited to apply at the DG units output (locally). This article presents a multinodal control scheme where DGs can compensate for voltage unbalance at multiple remote nodes of the MG, thus overcoming both state-of-the-art strategies limitations. In particular, negative-sequence voltage is eliminated at as many remote nodes as the number of available DG's. A systematic approach for the multiple-input/multiple-output (MIMO) nature of the problem is presented covering three aspects. First, a square MIMO control strategy is established and a feasibility test is derived to assess whether the problem can be solved. Second, the cross-coupling interaction between the multiple controllers is minimized by optimally selecting, which DGs will contribute to mitigate the remote unbalances. Third, stability and transient dynamics are analyzed. Laboratory experimental results corroborate the control performance.
引用
收藏
页码:3052 / 3063
页数:12
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