主被動相結(jié)合的孤島檢測方案研究
徐建委
(國網(wǎng)甘肅省電力公司經(jīng)濟技術(shù)研究院,甘肅 蘭州 730050)
摘 要:介紹了孤島效應的發(fā)生機理和危害,在被動式過/ 欠壓與過/ 欠頻孤島檢測法和主動移頻式(AFD) 孤島檢測法的基礎上提出一種主被動相結(jié)合的孤島檢測方案,闡述了該方案的具體實現(xiàn)策略,并分別從純阻性、感性、容性、諧振四種負載特性對方案進行仿真分析。結(jié)果表明該方案既可以減少AFD 孤島檢測方法對電網(wǎng)造成的諧波污染,又可以彌補被動式過/ 欠壓與過/ 欠頻孤島檢測方法檢測盲區(qū)太大的不足,有效提高了孤島檢測的效率。
關(guān)鍵詞:孤島檢測;被動式過/ 欠壓與過/ 欠頻孤島檢測法;AFD 孤島檢測法;主被動相結(jié)合
中圖分類號:TM615;TM930.1 文獻標識碼:A 文章編號:1007-3175(2017)06-0031-06
Study on Combination of Active and Passive Islanding Detection Scheme
XU Jian-wei
(State Grid Gansu Economic Research Institute, Lanzhou 730050, China)
Abstract: Introduction was made to the mechanism and harm of islanding effect. On the basis of the passive over/under voltage and over/ under frequency islanding detection method, this paper proposed a kind of combination of active and passive islanding detection scheme, elaborated the concrete implementation strategy of this scheme and carried out the simulation analysis for the scheme from the four load characteristics of pure resistive, inductive, capacitive and resonance. The result shows that this scheme could not only reduce the harmonic pollution to the power grid caused by the automatic feeding device (AFD) islanding detection method, but also make up the deficiency of too large non-detection zone (NDZ) of passive over / under voltage and over / under frequency islanding detection method, which effectively improves
the efficiency of island detection.
Key words: islanding detection; passive over/under voltage and over/under frequency islanding detection method; automatic feeding device islanding detection method; combination of active and passive islanding detection
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