光伏并網(wǎng)逆變器的孤島檢測(cè)技術(shù)
劉方銳，康勇，張宇
（華中科技大學(xué)電氣與電子工程學(xué)院。湖北武漢430074）

摘要：以光伏逆變器為代表的各種并網(wǎng)逆變器通常要求具備孤島檢測(cè)功能．被動(dòng)式的孤島檢測(cè)方法存在較大孤
島檢測(cè)盲區(qū)．主動(dòng)檢測(cè)法提高了孤島檢測(cè)的可靠性，但其在并網(wǎng)逆變器的輸出中施加了擾動(dòng)，影響了并網(wǎng)電能質(zhì)量．重點(diǎn)分析移頻與移相主動(dòng)孤島檢測(cè)算法的工作原理及參數(shù)選取原則，并給出相關(guān)的參數(shù)優(yōu)化建議，同時(shí)探討多并網(wǎng)逆變器運(yùn)行時(shí)的孤島檢測(cè)有效特性，為光伏并網(wǎng)逆變器的孤島檢測(cè)設(shè)計(jì)提供參考．

關(guān)鍵詞：光伏；并網(wǎng)逆變器；孤島檢測(cè)

中圖分類號(hào)：TM 615 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1673-9140(2009)01-0008-04

Investigation of islanding detection strategies
for PV grid-connected converters
LIU Fang·rui，KANG Yong，ZHANG Yu
(College of Electrical and Electronic Engineering．Huazhong University of Science and Technology，Wuhan 430074，China)
Abstract：Islanding detection is卸essential function for most鰣d—connected converters，especially PV
grid—connected conveners．The passive islanding detection bbbbbbs have large none detection zone．The
active islanding detection strategies are proposed to improve the detection ability．However，they introduce
perturbations in the converters output，contributing to poor power quality．This paper analyzes the
working principle and bbbbbeters selection rules for frequency shift and phase shift islanding detection
techniques．The algorisms optimization and the multi—converter operation perbbbbance are also investiga—
ted．It provides basic islanding detection guidance for PV grid—connected converters．
Key words：PV；酣d—connected converter；islanding detection

光伏并網(wǎng)逆變器的孤島檢測(cè)技術(shù).rar