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title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" 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title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT" title="SINVERT">SINVERT光伏并網(wǎng)逆變器在國網(wǎng)電力科學(xué)研究院國家能源太陽能發(fā)電研發(fā)（實(shí)驗）中心順利通過低電壓穿越（LVRT）全功能測試，并取得相關(guān)測試報告。國網(wǎng)電科院LVRT的測試認(rèn)證表明西門子SINVERT光伏并網(wǎng)逆變器完全符合國電電網(wǎng)《光伏電站接入電網(wǎng)技術(shù)規(guī)定》對光伏電站低電壓穿越功能的嚴(yán)格要求。此前，西門子SINVERT光伏并網(wǎng)逆變器已經(jīng)取得歐洲權(quán)威機(jī)構(gòu)德國聯(lián)邦能源和水資源協(xié)會（BDEW）的低電壓穿越測試認(rèn)證。
　
　　本次認(rèn)證由國內(nèi)權(quán)威機(jī)構(gòu)——國家能源太陽能發(fā)電研發(fā)（實(shí)驗）中心進(jìn)行全部測試工作。測試嚴(yán)格依據(jù)國家電網(wǎng)《光伏電站接入電網(wǎng)技術(shù)規(guī)定》和《光伏電站接入電網(wǎng)測試規(guī)程》，其中包括三相平衡跌落及單相不平衡跌落測試等功能項。
　
　　低電壓穿越（LVRT）指在電網(wǎng)電壓發(fā)生跌落的情況下，光伏逆變器能夠在一定的條件和時間范圍內(nèi)保持并網(wǎng)，直到電網(wǎng)恢復(fù)正常。低電壓穿越技術(shù)是提高電網(wǎng)系統(tǒng)安全穩(wěn)定性的最大保障，如果光伏逆變器不具備低電壓穿越功能，則會增加整個系統(tǒng)的恢復(fù)難度，甚至給已經(jīng)不平衡的電網(wǎng)帶來額外的擾動，最終導(dǎo)致系統(tǒng)失穩(wěn)。隨著電站運(yùn)行經(jīng)驗的不斷積累和技術(shù)發(fā)展，LVRT已經(jīng)成為全球范圍內(nèi)太陽能光伏發(fā)電和風(fēng)電行業(yè)的重要技術(shù)要求。2011年起，德國、西班牙等國家已經(jīng)將該功能列為強(qiáng)制性要求。2011年8月，中國也對光伏并網(wǎng)逆變器的低電壓穿越功能提出了強(qiáng)制性要求。
　
　　作為集中式太陽能光伏逆變器的發(fā)明者，西門子擁有超過25年的技術(shù)積累與應(yīng)用經(jīng)驗，此次通過認(rèn)證是對西門子愿與中國用戶分享其在太陽能光伏發(fā)電領(lǐng)域經(jīng)驗和技術(shù)的高度認(rèn)可。