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

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單相并聯(lián)逆變器的并網和孤島控制策略

來源:電工電氣發(fā)布時間:2016-10-19 10:19 瀏覽次數(shù):7
單相并聯(lián)逆變器的并網和孤島控制策略
 
明巖
(河北工業(yè)大學 電磁場與電器可靠性省部共建重點實驗室,天津 300130)
 
    摘 要:基于并網和孤島控制原理,研究了兩臺逆變器并聯(lián)系統(tǒng)的并網和孤島控制策略。在并網運行時采用電流閉環(huán)控制,通過準PR 調節(jié)器實現(xiàn)零穩(wěn)態(tài)誤差調節(jié);在孤島運行模式時采用下垂控制和虛擬電感實現(xiàn)功率均分和環(huán)流抑制目標,并在下垂控制基礎上提出了一種混合濾波器平均功率提取方法。仿真結果表明,在孤島運行模式下,與傳統(tǒng)提取方法相比,采用混合濾波器平均功率提取方法能夠有效抑制功率振蕩,提高系統(tǒng)電能質量。
    關鍵詞:逆變器并聯(lián);功率均分;環(huán)流;并網控制;下垂控制
    中圖分類號:TM464     文獻標識碼:A     文章編號: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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