多逆变器并网运行耦合谐振分析及抑制策略  

Coupling Resonance Analysis of Multi-parallel Grid-connected Inverters and its Damping Strategy

作　　者：张春强[1] 陈智勇[2] 李鸣慎 匡慧敏 程石[2] 

机构地区：[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

出　　处：《计算技术与自动化》2016年第2期12-19,共8页Computing Technology and Automation

基　　金：国家电网公司科研项目(521820140018);国家自然科学基金重点项目(51237003);湖南省博士生科研创新项目(CX2015B084)

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。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.

关 键 词：多逆变器并联 耦合谐振 虚拟谐波电阻 微电网 

分 类 号：TP23[自动化与计算机技术—检测技术与自动化装置]