Inverter coupling evaluation and decoupling method based on dynamic relative gain

被引：0
|
作者：
Zhang X. [1 ]
Yan X. [1 ]
Zhang B. [1 ]
Li J. [1 ]
Lyu Z. [2 ]
机构：
[1] Key Laboratory of Distributed Energy Storage and Micro-Grid of Hebei Province North China Electric Power University, Baoding
[2] China Electric Power Research Institute, Beijing
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2021年 / 42卷 / 07期
关键词：
Coupling; Decoupling control; Diagonal matrix; Droop control; Inverter; Parameters pairing; Relative gain;
D O I：
10.19912/j.0254-0096.tynxb.2017-1050
中图分类号：
学科分类号：
摘要：
In view of the inverter power coupling phenomenon, the root causes of inverter power coupling are analyzed theoretically, and the dynamic relative gain method in control theory is applied in the distributed power generation system, put forward a quantitative evaluation method of inverter power coupling degree in full frequency-domain, realized the correct pairing of the control parameters and the controlled parameters. Power decoupling control method based on diagonal matrix, improved the traditional droop control strategy, with voltage and current double closed-loop control and feedforward decoupling, realized the independent control of the inverter output active power and reactive power. Finally, the rationality of power coupling degree evaluation method based on dynamic relative gain was verified by a concrete example, and the feasibility of diagonal matrix power decoupling control method was verified by simulation experiment. This paper provides a theoretical reference and technical support for evaluation of power coupling and optimization for grid decoupling control. Finally, through concrete examples to verify the power coupling quantitative evaluation method based on dynamic relative gain. And the simulation experiment demonstrates the rationality of power decoupling control based on diagonal matrix method. © 2021, Solar Energy Periodical Office Co., Ltd. All right reserved.
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页码：110 / 117
页数：7
相关论文
共 13 条
  • [1] WANG C S, XIAO Z X, WANG S X., Synthetical control and analysis of microgrid, Automation of electric power systems, 32, 7, pp. 98-103, (2008)
  • [2] TULADHAR A, JIN H, UNDER T, Et al., Control of parallel inverters in distributed AC power systems with consideration of line impedance effect, IEEE transactions on industrial application, 36, 1, pp. 131-138, (2000)
  • [3] AHN S J, PARK J W, CHUNG I Y, Et al., Power-sharing method of multiple distributed generators considering control modes and configurations of a microgrid, IEEE transactions on power delivery, 25, 3, pp. 2007-2016, (2010)
  • [4] LI Y W, VILATHUAMUWA D M, LOH P C., Design, analysis, and real-time testing of a controller for multibus microgrid system, IEEE transactions on power electronics, 19, 5, pp. 1195-1204, (2004)
  • [5] LIN X C, DUAN S X, KANG Y, Et al., Modeling and stability analysis for parallel operation of UPS with no control interconnection basing on droop characteristic, Proceedings of the CSEE, 24, 2, pp. 33-38, (2004)
  • [6] CHANDORKAR M C, DIVAN D M, ADAPA R., Control of parallel connected inverters in standalone ac supply systems, IEEE transactions on industrial application, 29, 1, pp. 136-143, (1993)
  • [7] LI P, YANG S W, YIN Z H., Voltage stabilization and decoupling droop control method for microgrid based on RGA, Proceedings of the CSEE, 35, 5, pp. 1041-1050, (2015)
  • [8] LI Y W, KAO C N., An accurate power control strategy for power electronics units operating in ainterfaced distributed low voltage power multihus generation microgrid, IEEE transactions on electronics, 24, 12, pp. 2977-2988, (2009)
  • [9] SUN X F, YANG Y L, ZHAO W, Et al., An adaptive droop control method for inverters in microgrid, Power system technology, 38, 9, pp. 2387-2397, (2014)
  • [10] ENGLER A., Applicability of droops in low voltage grids, International journal of distributed energy resources, 1, 1, pp. 1-6, (2005)
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