电网不平衡情况下并网逆变器控制策略综述

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摘要在电网电压不平衡情况下,并网逆变器的输出有功功率和电流将存在二次脉动和畸变。为了提高电网不平衡时并网逆变器并网电流质量,有效降低并网逆变器对电网的冲击,研究不平衡电网情况下并网逆变器控制策略成为了迫切的需求。根据不同控制目标,从并网同步算法、正负序分离、电流跟踪控制、谐波补偿和滤波器技术等方面对现有并网逆变器控制策略进行综述。最后,对不平衡电网情况下并网逆变器发展趋势进行探讨。

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	阳同光
	桂卫华

关键词 ：电网不平衡, 并网逆变器, 控制策略, 综述

Abstract：Under unbalance grid voltage and distortion conditions, the output active power and current of grid-connected inverter will be secondary pulsation and distortion. In order to improve the quality of grid-connected inverter current, reduce the impact of the grid-connected inverter to the grid effectively, research on grid-connected inverter control strategy under unbalanced voltage has become important. In this paper, focus on grid synchronization, extract the positive-negative-sequence frequency current, current control, harmonics and filter, overview of the current control for grid-connected inverter under unbalance voltage conditions is present and evaluated. Furthermore, the trends of the grid inverter under unbalanced grid conditions are discussed.

Key words： Grid voltage unbalance grid-connected inverter control strategy overview

收稿日期: 2014-08-14 出版日期: 2015-09-08

PACS:

TM315

基金资助:国家自然科学基金重点资助项目（51037004）,国家自然科学基金（51077097）和湖南省教育厅资助项目（13A011）

作者简介: 阳同光男,1974年生,博士后,副教授,研究方向为光伏发电机系统及其控制。桂卫华男,1950年生,教授,博士生导师,研究方向为冶金、新能源系统及其控制。

引用本文:

阳同光,桂卫华. 电网不平衡情况下并网逆变器控制策略综述[J]. 电工技术学报, 2015, 30(14): 241-246. Yang Tongguang,Gei Weihua. An Overview on Control Strategies of Grid-connected Inverter under Unbalanced Voltage Conditions. Transactions of China Electrotechnical Society, 2015, 30(14): 241-246.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2015/V30/I14/241

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