文献类型：期刊文献

中文题名：微电网逆变器虚拟磁链下垂控制策略

英文题名：Microgrid Inverter Virtual Flux Droop Control Strategy

作者：付会凯[1];杜川[1]

第一作者：付会凯

机构：[1]新乡学院机电工程学院,河南新乡453003

第一机构：新乡学院机电工程学院

年份：2020

卷号：50

期号：11

起止页码：34-39

中文期刊名：电气传动

外文期刊名：Electric Drive

收录：CSTPCD;;北大核心:【北大核心2017】；

基金：河南省高等教育教学改革研究与实践项目(2017SJGLX490);河南省高等学校重点科研项目(19A510021,16B470003)。

语种：中文

中文关键词：微电网;逆变器;功率均分;虚拟磁链;下垂控制

外文关键词：microgrids;inverter;power sharing;virtual flux;droop control

摘要：在微电网中,当逆变器并联运行时,传统的电压下垂方案可用于调节逆变器自身的输出电压频率和幅值,以实现功率共享,但存在诸如复杂内部多回路反馈控制、输出电压频率和幅值偏差等问题。为了解决这些问题,设计了一种新型的逆变器虚拟磁链下垂控制。在逆变器虚拟磁链与有功和无功功率间关系的基础上,导出了小信号模型。利用小信号模型设计了虚拟磁链下垂控制器,分析了系统的稳定性。此外,使用了一种直接磁链控制算法来调节虚拟磁链,避免了比例积分控制器和脉宽调制器的使用。实验结果表明,新控制策略可以有效实现逆变器之间的功率共享,并且频率偏差小于传统方案。
In the microgrid,the traditional voltage droop method can be used to adjust the inverter's own output voltage frequency and amplitude to achieve autonomous power sharing,but there are problems such as complicated inner multiloop feedback control,frequency and amplitude deviation of the output voltage.Aiming at these problems,a novel inverter virtual flux droop control strategy was designed.Based on the relationship between the inverter virtual flux and the active and reactive powers,a small signal model was derived,and the virtual flux linkage controller was designed by the small signal model,and the stability of the system was analyzed.In addition,a direct flux control algorithm was used to adjust the virtual flux,avoiding the use of proportional-integral controllers and pulse width modulation modulators.The experimental results show that the new control strategy can effectively achieve the power sharing between the inverters,and the frequency deviation is smaller than the traditional scheme.