| 多逆变器并网运行耦合谐振分析及抑制策略 |
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| 引用本文： | 张春强,陈智勇,李鸣慎,匡慧敏,程石. 多逆变器并网运行耦合谐振分析及抑制策略[J]. 计算技术与自动化, 2016, 0(2): 12-19 |
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| 作者姓名： | 张春强 陈智勇 李鸣慎 匡慧敏 程石 |
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| 作者单位： | (1.江西省电力科学研究院,江西 南昌330006;2.湖南大学 电气与信息工程学院,湖南 长沙410082) |
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| 摘 要： | 多逆变器并网运行的谐振问题与单台逆变器相比较为复杂。本文建立的多逆变器并网运行的诺顿等效数学模型，按谐振产生机理的差异将谐振划分为：自身谐振、并联谐振、串联谐振，并分析了各类谐振的特点；电流控制环节引入谐波电流补偿的有源阻尼环节，以衰减耦合谐振峰值。通过与未采用谐波电流补偿的控制策略的对比研究，验证该方案抑制谐振的有效性。
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| 关 键 词： | 多逆变器并联；耦合谐振；虚拟谐波电阻；微电网 |
Coupling Resonance Analysis of Multi-parallel Grid-connected Inverters and its Damping Strategy |
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| ZHANG Chun-qiang,CHEN Zhi-yong,LI Ming-shen,KUANG Hui-min,CHENG Shi. Coupling Resonance Analysis of Multi-parallel Grid-connected Inverters and its Damping Strategy[J]. Computing Technology and Automation, 2016, 0(2): 12-19 |
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| Authors: | ZHANG Chun-qiang CHEN Zhi-yong LI Ming-shen KUANG Hui-min CHENG Shi |
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| Affiliation: | (1.Jiangxi Electric Power Research Institute,Nanchang,Jiangxi330006,China;2.College of Electrical and Information Engineering, Hunan University,Changsha,Hunan410082,China) |
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| Abstract: | The resonance problem in multi-paralleled inverters with LCL filter operating on grid-connected mode in microgrid is more complex than single one. In this paper, the mathematic model of multi-parallel inverters was figured out based on Norton''s equivalent circuit. And in terms of different causes of resonance, the resonance problems associated with multi-paralleled inverters operating in grid-connected mode were categorized into three types: individual resonance, parallel resonance, series resonance. In order to attenuate resonance peak, a compensation term of harmonic current was engaged into current control loop. The comparative study was conducted to verify the effectiveness of resonance attenuation method. |
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| Keywords: | Multi-paralleled inverters coupling resonance virtual harmonic resistor microgrid |
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