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href='/chanpindaohang/'>產品導航</a> > <a href='/weijibaohu/'>微機?；ぷ爸?/a> > <a href='/zongbaojishu/'>綜保技術資訊</a> > </h4> </div> <div class="ns_show1"> 防孤島?；ぷ爸糜敕垂碌鶴爸玫那?/div> <div class="ns_show2"> 責任編輯：admin 發表時間：2018-04-18 11:14文章出處：未知人氣： </div> <div class="ns_show4">  <div id="bdshare" class="bdshare_t bds_tools get-codes-bdshare"> <span class="bds_more">分享到：</span> <a target="_blank" class="bds_qzone">QQ空間</a> <a target="_blank" class="bds_tsina"> 新浪微博</a> <a target="_blank" class="bds_tqq">騰訊微博</a> <a target="_blank" class="bds_renren">人人網</a> <a target="_blank" class="bds_t163"> 網易微博</a> <a target="_blank" class="shareCount"></a> </div>  </div> <div class="ns_show6"> <div class="dlbd"> 自打從事電氣行業以來，主要接觸的光伏行業。在國家的大力支持下，光伏產業發展的比較快。與此同時對光伏電站的規范也逐漸完善，其中<a href="//www.vtrguu.com.cn/fanggudaobaohuzhuangzhi/">防孤島?；ぷ爸?/a>應該是在2014年左右提出來的。防孤島?；ぷ爸彌饕觳獾繽繆?，當電網電壓異?；蛘咄５緄那榭魷?，電站出線開關跳閘。一般檢測的是故障為電壓高，電壓低、頻率高、頻率低。其功能與故障解列裝置有很多相同的地方。不過對于好多設計規范里，兩者都同時存在。而對于低壓來講，也有對防孤島的要求。其中原文大概內容為對于中大型光伏電站，根據當地供電局要求，防孤島裝置可加也可不加，而對于小型光伏電站，必須加裝防孤島?；ぷ爸?。因此防孤島?；ぷ爸迷詰脫怪惺褂玫囊埠芏?。然而對于地區不同，要求的也就多樣化了，除了常規的必須要有的防孤島?；ね?，還有剩余電流?；?，過流速斷?；さ鵲?。個人感覺防孤島在村級電站中還是很有必要的，一般為幾百千瓦的安裝容量，通過光伏專變并網。然而隨著光伏的發展，家庭屋頂光伏越來越多，反孤島裝置開始嶄露頭角。</div> <div class="dlbd"> </div> <div class="dlbd"> 首先需要聲明的是，防孤島和反孤島這兩個本身是兩個不同的概念。反孤島是以柜子的形式安裝在變壓器旁，與JP柜配合使用。其目的是當出現孤網運行狀態時，及時處理。通過繞組的擾動迫使逆變器停止工作。如下簡圖：</div> <div style="text-align: center;"> <img alt="反孤島裝置" src="/uploads/180418/1-1P41Q1133Y24.png" style="width: 819px; height: 460px;" /></div> <div class="dlbd"> 即使并網開關處于斷開狀態，光伏發的電和用戶依然很有可能出現平衡，但是光伏發的電如果脫離電網，那么電能質量不一定在國家允許的狀態，對于用戶使用電來講危害不小。因此孤網運行是堅決杜絕的。而且并網開關多為自動重合閘開關，如果開關在閉合狀態，同時電網處于檢修，這樣如果給電網返送電，對于檢修人員的人身安全來說肯定是危害比較大的。因此國家電網典型設計規范明確<a href="//www.vtrguu.com.cn/fanggudaobaohuzhuangzhi/794.html">光伏反孤島裝置</a>必須安裝使用。</div> 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