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基于重复控制的微电网逆变器控制策略
Repetitive-Control-Based Control Technologies for Micro-Grid Inverters
投稿时间:2017-11-30  修订日期:2018-01-11
DOI:
中文关键词:  微电网逆变器  重复控制  平滑切换  谐波抑制
英文关键词:Micro-Grid Inverter  Repetitive Control  Seamless Transfer  Harmonic Current Suppression
基金项目:
作者单位E-mail
孙龙庭 南京航空航天大学电气工程系 sunlongting@foxmail.com 
张旸 南京航空航天大学电气工程系 youngzhang@nuaa.edu.cn 
陈新 南京航空航天大学电气工程系 chen.xin@nuaa.edu.cn 
摘要点击次数: 101
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中文摘要:
      微电网逆变器有两种工作模式:当电网正常时,微电网逆变器工作于并网模式,而当电网发生故障时,微电网逆变器能工作于孤岛模式提供电压支撑。为了微电网逆变器能够在两种工作模式之间平滑切换,论文提出了针对控制环路切换和相位锁定的优化方法。此外,微电网逆变器在并网模式下的供能质量会受到电网电压背景谐波的影响。因此,论文引入了一种与传统重复控制相比具有6倍响应速度的T/6重复控制方法抑制谐波电流。最后论文通过实验样机验证了所提控制策略的有效性。
英文摘要:
      Micro-grid inverters have two working modes: when the utility is normal, a micro-grid inverter can work in grid-connected mode, and when the utility fails, it should operate in islanding mode to power local loads continuously. To achieve seamless transfer between the two modes, improved methods for control loop transition and phase locking are proposed in this paper. In addition, micro-grid inverters suffer from the grid voltage, which is replete with background harmonics in grid-connected mode. Hence, based on T/6 repetitive control, which has a six-fold re-sponse speed-up compared with conventional repetitive control, a harmonic current suppression control method is introduced. Finally, these control methods are integrated with a micro-grid inverter, and an experimental prototype is tested to verify the effectiveness of the proposed strategy.
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