2012年4月,西門子(中國(guó))有限公司工業(yè)業(yè)務(wù)領(lǐng)域驅(qū)動(dòng)技術(shù)集團(tuán)大型傳動(dòng)部系統(tǒng)集成商北京辰源CS500光伏逆變器和北京昆蘭SOLARTEC CENTRAL 500光伏逆變器在國(guó)網(wǎng)電力科學(xué)研究院國(guó)家能源太陽能發(fā)電研發(fā)(實(shí)驗(yàn))中心均順利通過低電壓穿越全功能測(cè)試,這是由西門子全新智能型SinamicsS120產(chǎn)品系列集成的光伏逆變器首次通過該測(cè)試。
D0141DF USPP D0141DF兩家系統(tǒng)集成商(北京辰源和北京昆蘭)均采用了西門子大型傳動(dòng)部的SinamicsS120光伏逆變單元、控制單元及軟件作為核心部件。這些核心部件出色的控制技術(shù)不僅可以提高系統(tǒng)效率,而且有效地抑制了網(wǎng)側(cè)諧波,讓變頻器具備完美的低電壓穿越能力,從而能夠保障系統(tǒng)高效、可靠地并網(wǎng)運(yùn)行。
D0141DF USPP D0141DF根據(jù)國(guó)家能源局、國(guó)家電網(wǎng)公司對(duì)光伏電站并網(wǎng)發(fā)電的要求,并網(wǎng)發(fā)電的光伏逆變器必須具備低電壓穿越功能,以確保電網(wǎng)穩(wěn)定運(yùn)行,否則不允許其并網(wǎng)。因此,光伏逆變器具備低電壓穿越能力成為“金太陽認(rèn)證”后光伏項(xiàng)目招投標(biāo)的又一道門檻。
國(guó)網(wǎng)電科院國(guó)家能源太陽能發(fā)電研發(fā)(實(shí)驗(yàn))中心是在國(guó)內(nèi)唯一具有低電壓穿越技術(shù)認(rèn)證資格的機(jī)構(gòu)。該測(cè)試依據(jù)國(guó)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(cè)試規(guī)程》,包括三相平衡跌落及各個(gè)單相不平衡跌落測(cè)試等,需在不同跌落深度及輕載與滿載兩個(gè)功率點(diǎn)下進(jìn)行。
D0141DF USPP D0141DF西門子大型傳動(dòng)部在工業(yè)驅(qū)動(dòng)領(lǐng)域擁有多年經(jīng)驗(yàn)。西門子于2010年在其原有的SINAMICS逆變器硬件平臺(tái)基礎(chǔ)上開發(fā)了專門應(yīng)用于太陽能的光伏逆變器單元。
D0141DF USPP D0141DF目前西門子在中國(guó)國(guó)內(nèi)采取與系統(tǒng)集成商合作的方式,由西門子提供光伏逆變器的核心元器件,集成商提供整體逆變器的模式推動(dòng)中國(guó)市場(chǎng)的銷售。這種商業(yè)模式可以大大降低產(chǎn)品價(jià)格,并更好地適應(yīng)中國(guó)市場(chǎng)的需求。
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