一种并联逆变器瞬时电流控制策略 |
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引用本文: | 马翔宇,肖黎明.一种并联逆变器瞬时电流控制策略[J].江苏电器,2014(7):20-23. |
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作者姓名: | 马翔宇 肖黎明 |
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作者单位: | 华中科技大学电气与电子工程学院,湖北武汉430074 |
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摘 要: | 高效的负载电流分配和环流抑制策略是逆变器并联运行的关键,提出了一种基于环流前馈的瞬时电流控制策略。通过建立PID闭环控制逆变器数学模型,对输出等效阻抗进行分析,引入瞬时环流前馈控制策略,利用配置虚拟环流阻抗以达到负载均分和抑制环流的目的。Matlab/Simulink仿真证明了该策略的正确性,该方案易于实现,便于进行数字化控制。
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关 键 词: | 并联逆变器 环流前馈 虚拟环流阻抗 |
An Instantaneous Current-Sharing Control Strategy for Parallel-Connected Inverters |
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Authors: | MA Xiang-yu XIAO Li-ming |
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Affiliation: | (School of Electrical and Electronic Engineering, Huazhong University of Science & Technology, Wuhan 430074, China) |
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Abstract: | High efifciency load-current sharing control and circulating current retraining strategy is the key of inverters parallel operation. This paper proposed an instantaneous current-sharing control strategy based on the circulating current feed-forward. Via the establishment of the inverter mathematical model controlled by loop-closed PID, analysis was made to the equivalent output impedances. The instantaneous circulating current feed-forward control strategy was introduced and the conifguration of virtual circulating current impedances was used to achieve the goal of load-current sharing and circulating current retraining. Simulink simulation in Matlab veriifes that this strategy is correct, convenient for the implement of digital control. |
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Keywords: | parallel-connected inverters circulating current feed-forward virtual circulating current impedance |
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