Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

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单相并联逆变器的并网和孤岛控制策略

来源:电工电气发布时间:2016-10-19 10:19 浏览次数:7
单相并联逆变器的并网和孤岛控制策略
 
明岩
(河北工业大学 电磁场与电器可靠性省部共建重点实验室,天津 300130)
 
    摘 要:基于并网和孤岛控制原理,研究了两台逆变器并联系统的并网和孤岛控制策略。在并网运行时采用电流闭环控制,通过准PR 调节器实现零稳态误差调节;在孤岛运行模式时采用下垂控制和虚拟电感实现功率均分和环流抑制目标,并在下垂控制基础上提出了一种混合滤波器平均功率提取方法。仿真结果表明,在孤岛运行模式下,与传统提取方法相比,采用混合滤波器平均功率提取方法能够有效抑制功率振荡,提高系统电能质量。
    关键词:逆变器并联;功率均分;环流;并网控制;下垂控制
    中图分类号:TM464     文献标识码:A     文章编号:1007-3175(2016)10-0014-06
 
Grid-Connected and Islanding Control Strategy for Single-Phase Parallel Inverters
 
MING Yan
(Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical
Apparatus Reliability, Hebei University of Technology, Tianjin 300130, China)
 
    Abstract: Based on the grid-connected and islanding control principle, this paper studied the grid-connected and islanding control strategy of the system with two parallel inverters. The current closed-loop control was adopted at the time of grid-connected operation. The standard PR regulator was used to realize zero steady state error regulation. In the islanding mode, the droop control and virtual inductance methods realized the targets of power sharing and circulating current suppression. On the basis of the droop control, this paper proposed a kind of average power extraction method with a hybrid filter. The simulation results show that under the isolated island operation mode, compared with the traditional extraction method, the average power extraction method adopting the hybrid filter could suppress the power vibration effectively, raising the system power quality.
    Key words: inverters in parallel; power sharing; circulating current; grid-connected control; droop control
 
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