配電網(wǎng)對(duì)于智能電網(wǎng)的重要性:
R88M-WP75030T-BW建設(shè)智能電網(wǎng),第一要?jiǎng)?wù)就是解決供電可靠性問題。而要提高供電可靠性,必須重點(diǎn)關(guān)注配電網(wǎng)。目前在電力系統(tǒng)中,配電網(wǎng)是影響用戶供電可靠性的短板。根據(jù)數(shù)據(jù)統(tǒng)計(jì),扣除缺電因素,目前我國用戶的停電時(shí)間95%以上都是由配電網(wǎng)引起的。提高配電網(wǎng)的供電可靠性和供電質(zhì)量,是實(shí)現(xiàn)人民安居樂業(yè)、經(jīng)濟(jì)發(fā)展、生活富裕的重要保證。
對(duì)于現(xiàn)代城市,由于大量使用電梯和軌道交通,停電可能帶來較為重大的人身安全問題,因此通過配網(wǎng)改造提高電網(wǎng)可靠性更加重要。
投資機(jī)會(huì):分布式能源供電
分布式能源是什么?關(guān)聯(lián)概念特高壓的優(yōu)勢(shì)
R88M-WP75030T-BW以集中發(fā)電、遠(yuǎn)距離輸電和大電網(wǎng)互聯(lián)為主要特征的電力系統(tǒng)是目前世界上電力生產(chǎn)、輸送和分配的主要方式。近年來,由于太陽能、風(fēng)能等新能源的迅速發(fā)展,分布式發(fā)電DG(DistributeGeneration)對(duì)電網(wǎng),特別是配電網(wǎng)絡(luò)的影響越來越大,可能會(huì)對(duì)整個(gè)配電網(wǎng)絡(luò)從結(jié)構(gòu)到設(shè)備上產(chǎn)生巨大的影響。
分布式發(fā)電,是指滿足用戶特定的需要、支持現(xiàn)有的配電網(wǎng)經(jīng)濟(jì)運(yùn)行或者同時(shí)滿足這兩方面要求,在用戶現(xiàn)場(chǎng)或靠近用戶現(xiàn)場(chǎng)配置的功率為小型,與環(huán)境兼容的發(fā)電機(jī)組。目前增量最快的是分布式太陽能、風(fēng)能等新能源發(fā)電方式。從目的上說,新能源發(fā)電可以增加電力系統(tǒng)的電量,減少電力系統(tǒng)對(duì)一次能源的消耗。特別是對(duì)化石能源缺乏、人口密集能源需求大的地區(qū),通過分布式新能源發(fā)電可以很好的緩解能源需求緊張和環(huán)境壓力。
R88M-WP75030T-BW關(guān)注有關(guān)分布式能源供電的政策態(tài)度其重視程度決定我們可能的投資方向
分布式能源可能帶來對(duì)配電網(wǎng)的影響?
。1)對(duì)電能質(zhì)量的影響。
風(fēng)力發(fā)電和光伏發(fā)電受天氣影響均具有間歇性和波動(dòng)性特點(diǎn),且一般配有整流-逆變?cè)O(shè)備和大量的電力電子設(shè)備,會(huì)產(chǎn)生一定的諧波和直流分量。諧波電流注入電力系統(tǒng)后,會(huì)引起電網(wǎng)電壓畸變,影響電能質(zhì)量,造成測(cè)量?jī)x表不準(zhǔn)確、加重負(fù)荷,還會(huì)造成電力系統(tǒng)繼電保護(hù)、自動(dòng)裝置誤動(dòng)作,影響電力系統(tǒng)安全運(yùn)行。
R88M-WP75030T-BW由于其并網(wǎng)電量隨機(jī)波動(dòng)較大、可調(diào)節(jié)性差,并網(wǎng)時(shí)會(huì)產(chǎn)生較大的沖擊電流,從而會(huì)引起電網(wǎng)頻率偏差、電壓波動(dòng)與閃變,引起饋線中的潮流發(fā)生變化,進(jìn)而影響穩(wěn)態(tài)電壓分布和無功特性,使電網(wǎng)的不可控性和調(diào)峰容量余度增大。
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