風(fēng)光互補(bǔ)發(fā)電是一種將光能和風(fēng)能轉(zhuǎn)化為電能的裝置。由于太陽能與風(fēng)能的互補(bǔ)性強(qiáng),風(fēng)光互補(bǔ)發(fā)電系統(tǒng)彌補(bǔ)了風(fēng)電和光電獨(dú)立系統(tǒng)在資源上的間斷不平衡、不穩(wěn)定。可以根據(jù)用戶的用電負(fù)荷情況和資源條件進(jìn)行系統(tǒng)容量的合理配置。既可保證風(fēng)光系統(tǒng)供電的可靠性,又可降低發(fā)電系統(tǒng)的造價(jià)。同時(shí),風(fēng)光互補(bǔ)系統(tǒng)是一套獨(dú)立的分散式供電系統(tǒng),可不依賴電網(wǎng)獨(dú)立供電,不消耗市電,不受地域限制,既環(huán)保又節(jié)能,還可作為一道典雅的風(fēng)景為城市景觀增姿添彩。
2AX-SGC NSFP 2AXSGC風(fēng)光互補(bǔ)系統(tǒng)由光伏電池組件(太陽能電池板)、風(fēng)力發(fā)電機(jī)組、蓄電池組、控制器、逆變器等幾部分組成。風(fēng)光互補(bǔ)系統(tǒng)的混合功率,為風(fēng)電的額定功率加光伏電池的峰值功率,它們共同向蓄電池組充電??刂破骺刂浦L(fēng)電和光電最大程度地發(fā)揮各自的效能,同時(shí)又要保證不會(huì)對(duì)蓄電池過充電,能穩(wěn)定電壓,使系統(tǒng)在恒壓充電狀態(tài)下工作。該系統(tǒng)無污染、無噪音,不產(chǎn)生廢棄物,是一種自然、清潔的可再生能源。人類為使居住環(huán)境不再受污染,風(fēng)能和太陽能將是今后世界能源的必然選擇。目前,利用太陽能和風(fēng)能在不同的季節(jié)、時(shí)間上互補(bǔ)特點(diǎn)發(fā)展起來的風(fēng)光互補(bǔ)發(fā)電照明技術(shù),已日臻完善,且正以前所未有的速度和力度迅速在全國(guó)推廣。
2007年2月經(jīng)省批準(zhǔn),2AX-SGC NSFP 2AXSGC森源電氣公司為河南省的風(fēng)力發(fā)電工程研究中心。現(xiàn)已在長(zhǎng)葛推進(jìn)區(qū)外9路及許昌東區(qū)107國(guó)道等不同路段,研制和安裝了風(fēng)光互補(bǔ)路燈照明系統(tǒng)。實(shí)踐證明,設(shè)計(jì)合理,效果良好。
依據(jù)我國(guó)城市道路照明設(shè)計(jì)標(biāo)準(zhǔn)cjj45-2006,森源電氣公司的風(fēng)光互補(bǔ)路燈照明系統(tǒng)的配置方案,如附表所列。
電力電子(pe)技術(shù)是利用電力電子器件對(duì)電能進(jìn)行控制和轉(zhuǎn)換的學(xué)科。它包括pe器件、變流電路和控制電路三部分,是電力、電子、控制三大電氣工程技術(shù)領(lǐng)域之間的交叉學(xué)科。隨著科學(xué)技術(shù)的發(fā)展,pe技術(shù)由于和現(xiàn)代控制理論、材料科學(xué)、電機(jī)工程、微電子技術(shù)等許多領(lǐng)域密切相關(guān),已逐步發(fā)展成為一門多學(xué)科相互滲透的綜合性技術(shù)學(xué)科,其應(yīng)用領(lǐng)域幾乎涉及到國(guó)民經(jīng)濟(jì)的各個(gè)工業(yè)部門。毫無疑問,它將成為新世紀(jì)的關(guān)鍵支撐技術(shù)之一。
2 pe技術(shù)在風(fēng)力發(fā)電機(jī)上的應(yīng)用
2AX-SGC NSFP 2AXSGC森源電氣股份有限公司最近正研制開發(fā)適用于微風(fēng)起動(dòng)、發(fā)電的第三代風(fēng)力發(fā)電機(jī)syfⅲ,該電機(jī)為軸向磁通的盤式永磁發(fā)電機(jī)。最大特點(diǎn)是能根據(jù)風(fēng)速、風(fēng)況的變化,相應(yīng)改變定子線圈的連接,共有16線圈串接、8串2并聯(lián)、4串4并、2串8并四種運(yùn)行模式,如圖1所示,以滿足闊功率范圍的正常發(fā)電與大幅度提高風(fēng)能利用率的要求。
為了實(shí)現(xiàn)這一目的,定子線圈的連接線端均通過固定的空心軸引出,接到專用的切換裝置上。然后,利用裝在轉(zhuǎn)軸上的轉(zhuǎn)速傳感器,輸出不同整定值的轉(zhuǎn)速信號(hào),并由此按預(yù)定的運(yùn)行模式對(duì)線圈的連接進(jìn)行切換,以便實(shí)現(xiàn)高的效率和高的輸出功率。
圖2(a)所示為定子線圈連接切換的原理圖;圖2(b)為具體的切換控制電路。按照風(fēng)速的大小,當(dāng)轉(zhuǎn)速n<n1時(shí)ic元件u1輸出高電平,u2、u3處于低電平,此時(shí),2AX-SGC NSFP 2AXSGC雙向開關(guān)管k1、k3、k5導(dǎo)通,發(fā)電機(jī)定子為16線圈1串聯(lián)模式;當(dāng)轉(zhuǎn)速n1<n<n2時(shí),u2輸出高電平,u1、u3輸出低電平,此時(shí)k1、k2、k4、k5導(dǎo)通,形成8串2并模式;當(dāng)轉(zhuǎn)速繼續(xù)上升,處于n2<n<n3時(shí),雙向開關(guān)管k2、k4、k6、k7、k8、k9接通,發(fā)電機(jī)線圈形成4串4并模式;當(dāng)轉(zhuǎn)速升高超過n3時(shí)(n>n3),通過類似方式發(fā)電機(jī)線圈則形成2串8并的連接模式。由此可實(shí)現(xiàn)大功率范圍的正常運(yùn)行發(fā)電。
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