基于最小能量补偿控制的微网动态电压恢复器

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Abstract In allusion to eliminate the short-term voltage disturbances appearing at the grid- connected operation mode or the switching between grid-connected operation mode and islanded operation mode of the micro-grid,a dynamic voltage restorer(DVR) model is proposed to meet the requirements of both islanded and grid-connected operation of micro-grid. The DVR structure is based on a conventional hybrid cascaded H-bridge multi-level inverter(MLI) topology,and a minimum energy compensation control scheme is proposed,which has characteristics of definite physical concept,distinct mathematical derivation and concise method in determining the angle of minimum injective active power. Moreover,it can further reduce the energy consumption of DVR at work,which could effectively prolong compensation time. Utilizing wind turbines-batteries units as DC energy storage component in micro-grid,the operation cost of the DVR is reduced; when the micro-grid work under islanded operation mode,the DVR can operate on micro-source mode,which can reduce the power supply from distribution network and be favorable for energy saving and emission reduction. The simulation results show the robustness and accuracy of the proposed DVR system.

Key words： Micro-grid dynamic voltage restorer short-term voltage disturbance hybrid cascaded H-bridge MLI minimum energy compensation control

Received: 05 May 2014 Published: 22 January 2015

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TM712

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	Huang Yonghong
	Xu Junjun
	Sun Yukun

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Huang Yonghong,Xu Junjun,Sun Yukun. Dynamic Voltage Restorer in Micro-grid Based on a Minimum Energy Compensation Control Scheme[J]. Transactions of China Electrotechnical Society, 2014, 29(12): 128-136.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2014/V29/I12/128

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