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| 深度|構建“源網荷儲”四維融合互動——新型電力系統的一種思路 |
| 時間:2021年05月21日 瀏覽:1503次 |
當前儲(chu)能(neng)基(ji)本配(pei)置在“源(yuan)”側和“網”側,在“荷(he)”側有(you)個別用戶投資自建儲(chu)能(neng),規(gui)模總(zong)量基(ji)本可以忽略不計(ji)。這種(zhong)或(huo)依附(fu)于(yu)“源(yuan)”、或(huo)依附(fu)于(yu)“網”、或(huo)依附(fu)于(yu)“荷(he)”的(de)“儲(chu)”只(zhi)為(wei)依附(fu)方服務,不能(neng)成為(wei)獨(du)立一極。這樣的(de)“源(yuan)網荷(he)儲(chu)”電(dian)力系(xi)統(tong)(tong)實質上是加強版的(de)“源(yuan)(yuan)網(wang)(wang)荷(he)”電(dian)力系(xi)統(tong)(tong),主角依然是“源(yuan)(yuan)網(wang)(wang)荷(he)”,“儲”只是“源(yuan)(yuan)網(wang)(wang)荷(he)”各(ge)(ge)自的(de)小(xiao)跟(gen)班。“儲”在其間沒有地位,沒有發(fa)言權(quan)。新型(xing)電(dian)網(wang)(wang)是“源(yuan)(yuan)網(wang)(wang)荷(he)儲”四(si)維互(hu)動的(de)關系(xi),迫切需要明確及提升“儲”的(de)地位,各(ge)(ge)方平等,傳統(tong)(tong)電(dian)力系(xi)統(tong)(tong)才能本質升級,構建為(wei)面(mian)向(xiang)未(wei)來的(de)“源(yuan)(yuan)網(wang)(wang)荷(he)儲”四(si)維融(rong)合互(hu)動的(de)新型(xing)電(dian)力系(xi)統(tong)(tong)。 構建(jian)“源網荷儲”四維融合互(hu)動 新型電力(li)系統的一種(zhong)思路 一、傳統(tong)電力(li)系統(tong)迫切(qie)需要本質升級 傳統(tong)(tong)電(dian)(dian)力系統(tong)(tong)由“源網(wang)荷”三者組成(cheng),為(wei)(wei)最大化利用清(qing)潔(jie)電(dian)(dian)力,平滑清(qing)潔(jie)電(dian)(dian)力的“間歇性、波動性”,穩定電(dian)(dian)源供應,儲(chu)能成(cheng)為(wei)(wei)解(jie)決(jue)問(wen)題的關(guan)鍵。傳統(tong)(tong)的“源網(wang)荷”電(dian)(dian)力系統(tong)(tong)由此變(bian)為(wei)(wei)“源網(wang)荷儲(chu)”電(dian)(dian)力系統(tong)(tong)。 當前儲(chu)能(neng)(neng)基本配置在“源”側(ce)和(he)“網(wang)(wang)(wang)”側(ce),在“荷(he)(he)(he)(he)”側(ce)有個(ge)別(bie)用(yong)戶投資自建(jian)儲(chu)能(neng)(neng),規模總量基本可(ke)以(yi)忽略不(bu)計。這種或依附于(yu)(yu)“源”、或依附于(yu)(yu)“網(wang)(wang)(wang)”、或依附于(yu)(yu)“荷(he)(he)(he)(he)”的(de)“儲(chu)”只為依附方服(fu)務,不(bu)能(neng)(neng)成為獨立一極。這樣的(de)“源網(wang)(wang)(wang)荷(he)(he)(he)(he)儲(chu)”電(dian)(dian)力(li)系(xi)統(tong)實質上是(shi)加(jia)強版的(de)“源網(wang)(wang)(wang)荷(he)(he)(he)(he)”電(dian)(dian)力(li)系(xi)統(tong),主角依然是(shi)“源網(wang)(wang)(wang)荷(he)(he)(he)(he)”,“儲(chu)”只是(shi)“源網(wang)(wang)(wang)荷(he)(he)(he)(he)”各自的(de)小跟(gen)班。“儲(chu)”在其(qi)間沒有地(di)位(wei),沒有發言權。新型電(dian)(dian)網(wang)(wang)(wang)是(shi)“源網(wang)(wang)(wang)荷(he)(he)(he)(he)儲(chu)”四維互(hu)動的(de)關系(xi),迫切需要明確及提升“儲(chu)”的(de)地(di)位(wei),各方平等,傳統(tong)電(dian)(dian)力(li)系(xi)統(tong)才能(neng)(neng)本質升級,構建(jian)為面(mian)向(xiang)未來的(de)“源網(wang)(wang)(wang)荷(he)(he)(he)(he)儲(chu)”四維融合互(hu)動的(de)新型電(dian)(dian)力(li)系(xi)統(tong)。 二、“荷”側用(yong)能心態分析(xi) 就目(mu)前而言,“源”側或“網”側配置的(de)儲能(neng)(neng)(neng),都(dou)不能(neng)(neng)(neng)積極地(di)和“荷(he)”側互動(dong),電力(li)系統實質(zhi)上依然沒有擺脫“源隨荷(he)動(dong)”的(de)傳統。在節(jie)能(neng)(neng)(neng)減(jian)排的(de)大背(bei)景下,“網”側積極地(di)給“荷(he)”側描繪碳(tan)形象,提供節(jie)能(neng)(neng)(neng)結果報告,幫助進行節(jie)能(neng)(neng)(neng)分(fen)析。都(dou)根本(ben)上不能(neng)(neng)(neng)直達用戶痛點(dian),不能(neng)(neng)(neng)協助用戶主動(dong)進行節(jie)能(neng)(neng)(neng)減(jian)排。 真正了解“荷”側需求只有(you)“荷”自身。如(ru)果“荷”不(bu)能自主選擇發(fa)電(dian)(dian)來(lai)源(yuan),不(bu)能區分(fen)究竟是(shi)(shi)化石(shi)能源(yuan)發(fa)電(dian)(dian)還(huan)是(shi)(shi)清潔能源(yuan)發(fa)電(dian)(dian),也(ye)沒有(you)利益驅(qu)使其(qi)選擇發(fa)電(dian)(dian)來(lai)源(yuan),“荷”側并不(bu)在乎(hu)是(shi)(shi)“黑電(dian)(dian)”或“綠電(dian)(dian)”。就如(ru)同城市打(da)出租車(che),“油”車(che)和“電(dian)(dian)”車(che)每公里(li)單價一樣(yang),同樣(yang)能安全(quan)快捷地(di)把(ba)乘客送到(dao)目的(de)地(di),乘客并不(bu)在意乘坐的(de)是(shi)(shi)“油”車(che)還(huan)是(shi)(shi)“電(dian)(dian)”車(che)。 只有通過利益和利害(hai)方式把“荷”側的(de)主動(dong)性(xing)調(diao)動(dong)起來,讓“荷”參與電(dian)源選(xuan)擇(ze)甚至是(shi)電(dian)力調(diao)度,才(cai)能改變過去“源隨荷動(dong)”的(de)被動(dong)式供電(dian),用戶有意愿且有能力主動(dong)選(xuan)擇(ze)綠色能源,才(cai)能在此基(ji)礎上構建(jian)未來新型電(dian)力系統,才(cai)能是(shi)各方互動(dong)的(de)新型電(dian)力系統。 三、儲能現狀分析(xi) (一)用戶側建設(she)儲(chu)能(neng)條件及作用: 1.必(bi)須擁有(you)一定體量(liang),才具(ju)備財力投(tou)資儲能。 2.各地(di)電(dian)價政策不一(yi),當峰谷電(dian)價差額足(zu)夠大,用戶(hu)有動力和意愿投資儲能,以達到降本增效(xiao)目的。 3.必須擁有(you)一定(ding)的(de)技(ji)術能(neng)力,以確保儲(chu)能(neng)安全有(you)效運行。 4.必須有(you)合適場地建設儲(chu)能。 用戶(hu)(hu)側建設儲(chu)(chu)能四個條件缺一不可,而且用戶(hu)(hu)側儲(chu)(chu)能設施不能向電(dian)網反供電(dian),收回(hui)儲(chu)(chu)能建設運營成本渠(qu)道(dao)單一,只(zhi)能靠峰谷(gu)差(cha)去消(xiao)化。所以用戶(hu)(hu)側儲(chu)(chu)能只(zhi)有特殊性,沒有普適性。 (二(er))電網側建設儲(chu)能條件(jian)及作(zuo)用: 1.作為基礎(chu)設(she)施建(jian)設(she),相(xiang)對容易(yi)獲(huo)得當地(di)政府支(zhi)持,可獲(huo)得合適(shi)儲能(neng)建(jian)設(she)用地(di)。 2.具有專業技術能力和團隊,保障儲能電站的安全(quan)運(yun)行。 3.具有一定財力建設儲(chu)能。 4.消納(na)社(she)會清潔能(neng)源發電(dian),電(dian)網調頻,削峰填谷。 兩者(zhe)對(dui)比,“荷”側(ce)(ce)(ce)建設儲能門(men)檻較高,更多考慮是躲避電(dian)網峰(feng)價,降本增(zeng)效(xiao),一(yi)般和清潔發電(dian)利用無關。而(er)且(qie)因各(ge)自條件(jian)不同,投資意(yi)愿也不同,不具(ju)備社(she)會推廣性。“網”側(ce)(ce)(ce)建設儲能門(men)檻較低,而(er)且(qie)“網”側(ce)(ce)(ce)儲能屬于公共(gong)設施,對(dui)社(she)會貢獻益處良多,但(dan)因為當前電(dian)價政(zheng)策下,儲能成本不能合理(li)地反應在銷售電(dian)價上,所以(yi)電(dian)網側(ce)(ce)(ce)缺乏一(yi)個積極部署的理(li)由——利益! 縱然“儲(chu)”將成為(wei)未來電力系統的重要組成部分已成為(wei)社會(hui)各方共識(shi),但各方缺乏投資意愿,“儲(chu)”在當前生(sheng)態(tai)下難(nan)以自我(wo)健(jian)康成長(chang)。 四、光伏儲(chu)能投資分析 以某(mou)太(tai)陽能資源一(yi)般地區為例(li),當地年日照小時(shi)數為2200小時(shi)—3000小時(shi),一(yi)般工商業(ye)高峰電(dian)價為0.8179元/度。 (一)單(dan)一用戶投資“光伏+儲能”情況(kuang)分析: 該地區A用(yong)戶擁(yong)有1000 m2的(de)可架(jia)設光伏面積。 采用多晶(jing)硅太陽能電池(chi)的光(guang)伏(fu)系(xi)統(tong),市(shi)場單價為(wei)(wei)3元(yuan)/瓦,每瓦安裝(zhuang)費0.5元(yuan),即光(guang)伏(fu)系(xi)統(tong)為(wei)(wei)3.5元(yuan)/瓦。一般100平方米可架(jia)設8—13kW的光(guang)伏(fu)板(ban)(ban),取(qu)均數10kW/100m2。A用戶可架(jia)設100kW的光(guang)伏(fu)板(ban)(ban)。 靜態(tai)光伏系統投資為100000(W)×3.5(元(yuan)/W)=35萬元(yuan)。 根據(ju)最新(xin)市(shi)場報價(jia),儲(chu)能(neng)(neng)(neng)鋰電(dian)池(chi)約(yue)為(wei)(wei)1.00元(yuan)(yuan)/Wh。自投資容量(liang)為(wei)(wei)400 kW·h、功率為(wei)(wei)100 kW的儲(chu)能(neng)(neng)(neng)電(dian)站。電(dian)池(chi)投入 400000W·h×1.00元(yuan)(yuan)/W·h=40萬(wan)元(yuan)(yuan);儲(chu)能(neng)(neng)(neng)對(dui)應逆變并(bing)網設備、儲(chu)能(neng)(neng)(neng)監控及基建(jian)等費用約(yue)為(wei)(wei)17.5萬(wan)元(yuan)(yuan)。儲(chu)能(neng)(neng)(neng)電(dian)站總投入約(yue)57.5萬(wan)元(yuan)(yuan)。 光伏(fu)和儲能合計(ji)投入35萬元(yuan)+57.5萬元(yuan)=92.5萬元(yuan)。 光(guang)伏(fu)發電系(xi)統損耗為30%,按當地年日照2000小時(shi)計算(suan),該光(guang)伏(fu)系(xi)統年發電量為: 2000小時(shi)×100KW×(1-0.3)=14萬度電 所(suo)發電(dian)(dian)(dian)量全部存入儲能電(dian)(dian)(dian)站平滑后再逆變成交流,經地區公網返回該用戶,儲能電(dian)(dian)(dian)站選用鋰電(dian)(dian)(dian)池,損耗較小。一充(chong)一放損耗約為10%。 A用戶(hu)每(mei)年(nian)可有效使(shi)用清(qing)潔電量: 14萬度(du)電(dian)×(1-0.1)=12.6萬度(du)電(dian) 該地區一般工商業(ye)高峰電(dian)價為0.8179元/度(du),所(suo)發電(dian)量(liang)經(jing)儲能緩存至電(dian)價高峰時段(duan)使用(yong),每年節省電(dian)費: 126000度×0.8179元/度≈11萬元 靜態投資(zi)回收期=92.5萬元(yuan)÷11萬元(yuan)/年(nian)=8.4年(nian) 多晶(jing)硅光伏(fu)板(ban)使用壽命約15年,磷酸鐵鋰電(dian)池無(wu)衰(shuai)減使用壽命約為10年,均(jun)大于8.4年靜(jing)態(tai)投資(zi)回收(shou)期(qi),整體投資(zi)獲利(li)可期(qi)。 (二)用戶側(ce)投資(zi)“光伏”,電網(wang)側(ce)投資(zi)“儲能(neng)”情況分析: 電(dian)網(wang)側(ce)(ce)“儲能”作為共享(xiang)資源(yuan),向周邊(bian)用(yong)戶(hu)開放,用(yong)戶(hu)按需付費租用(yong)電(dian)網(wang)側(ce)(ce)儲能容量,可以較完(wan)美(mei)地綜合電(dian)網(wang)側(ce)(ce)和(he)用(yong)戶(hu)側(ce)(ce)的需求,結合自身特點揚長避短。 在這種情況下(xia),多個用(yong)戶租(zu)用(yong)電網側(ce)儲(chu)(chu)能容量,客觀上共享該儲(chu)(chu)能電站的逆變(bian)等設備,既可達到實際使用(yong)效(xiao)果,又可降(jiang)低(di)用(yong)戶一(yi)次(ci)性投入成(cheng)(cheng)本(ben),也可降(jiang)低(di)用(yong)戶后期長期維護(hu)成(cheng)(cheng)本(ben)。 舉例說明:A用(yong)戶(hu)(hu)自建(jian)有100kW光(guang)伏發電(dian)(dian)(dian),電(dian)(dian)(dian)網(wang)企(qi)業(ye)在(zai)其(qi)鄰近處按A用(yong)戶(hu)(hu)需求(qiu)配套(tao)(tao)建(jian)設(she)400kW·h儲(chu)(chu)(chu)能(neng),接收A的(de)(de)光(guang)伏直流(liu)發電(dian)(dian)(dian),或存儲(chu)(chu)(chu)或逆變后經公網(wang)交流(liu)再供電(dian)(dian)(dian)回(hui)用(yong)戶(hu)(hu);鄰近該(gai)儲(chu)(chu)(chu)能(neng)電(dian)(dian)(dian)站(zhan)的(de)(de)B用(yong)戶(hu)(hu)自建(jian)有50kW光(guang)伏發電(dian)(dian)(dian),電(dian)(dian)(dian)網(wang)企(qi)業(ye)按需搭積(ji)木(mu)式(shi)配套(tao)(tao)建(jian)設(she)200kW·h儲(chu)(chu)(chu)能(neng);同樣按需搭積(ji)木(mu)式(shi)擴容(rong)該(gai)儲(chu)(chu)(chu)能(neng)電(dian)(dian)(dian)站(zhan),滿(man)足C、D用(yong)戶(hu)(hu)。A、B、C、D四個用(yong)戶(hu)(hu)客觀上共享該(gai)儲(chu)(chu)(chu)能(neng)電(dian)(dian)(dian)站(zhan)的(de)(de)除電(dian)(dian)(dian)池外(wai)的(de)(de)其(qi)它設(she)備(bei),有效地(di)降低(di)了電(dian)(dian)(dian)站(zhan)投資成本(ben),縮短儲(chu)(chu)(chu)能(neng)電(dian)(dian)(dian)站(zhan)投資周期(qi)。 (三)以上(shang)兩種形(xing)態對比分析: 光(guang)(guang)伏(fu)建設(she)成本(ben)日益(yi)降低,發電(dian)平價上網都會(hui)盈利,發電(dian)自(zi)用(yong)更能(neng)(neng)降低自(zi)身用(yong)電(dian)成本(ben)。就單一用(yong)戶(hu)(hu)全方(fang)位投(tou)資(zi)“光(guang)(guang)伏(fu)+儲(chu)能(neng)(neng)”而(er)言,雖然在理論上可完全收回(hui)(hui)投(tou)資(zi)并有相當盈利,但不(bu)(bu)確定因素較(jiao)多,回(hui)(hui)報期較(jiao)長,資(zi)金占有嚴(yan)重(zhong),且需要承擔后期人工及設(she)備維護費用(yong),故用(yong)戶(hu)(hu)全線投(tou)資(zi)“光(guang)(guang)伏(fu)+儲(chu)能(neng)(neng)”意(yi)愿不(bu)(bu)強。而(er)且光(guang)(guang)伏(fu)的波(bo)動性(xing)(xing)和間歇性(xing)(xing),使得(de)用(yong)戶(hu)(hu)的用(yong)電(dian)體驗較(jiao)差,也嚴(yan)重(zhong)影響用(yong)戶(hu)(hu)光(guang)(guang)伏(fu)自(zi)建自(zi)用(yong)積極性(xing)(xing);再加上目前(qian)政策上對“余(yu)電(dian)上網”變(bian)現預(yu)設(she)有消納前(qian)提,且手續(xu)繁瑣,對小(xiao)容量光(guang)(guang)伏(fu)發電(dian)不(bu)(bu)太友好,進一步(bu)打擊用(yong)戶(hu)(hu)自(zi)建分布式(shi)光(guang)(guang)伏(fu)的積極性(xing)(xing)。 作為增量配電(dian)(dian)(dian)(dian)企(qi)業(ye),在(zai)轄(xia)區提(ti)供共享(xiang)儲能服務(wu),海納百川式接納各個中小用(yong)(yong)戶(hu)的光伏發電(dian)(dian)(dian)(dian),對于清潔發電(dian)(dian)(dian)(dian)來者不拒,經(jing)(jing)“平(ping)滑”加工后提(ti)供給(gei)用(yong)(yong)戶(hu),可完全消除用(yong)(yong)戶(hu)對供電(dian)(dian)(dian)(dian)穩定(ding)性的疑慮;也可在(zai)用(yong)(yong)戶(hu)同意下以高于國家(jia)補貼后價(jia)格、低于目錄電(dian)(dian)(dian)(dian)價(jia)的基(ji)礎(chu)上,經(jing)(jing)公(gong)網供給(gei)其它用(yong)(yong)戶(hu),為簽約用(yong)(yong)戶(hu)提(ti)供余電(dian)(dian)(dian)(dian)變(bian)現通(tong)道。在(zai)此過程,用(yong)(yong)戶(hu)通(tong)過儲能及電(dian)(dian)(dian)(dian)網調度,在(zai)保障(zhang)自身(shen)供應(ying)基(ji)礎(chu)上,投資(zi)(zi)收(shou)益最大化;儲能投資(zi)(zi)方收(shou)取(qu)相(xiang)應(ying)容量的基(ji)本租賃費獲(huo)取(qu)收(shou)益;電(dian)(dian)(dian)(dian)網企(qi)業(ye)收(shou)取(qu)按電(dian)(dian)(dian)(dian)量計算(suan)的服務(wu)費獲(huo)取(qu)收(shou)益。最終實現多方共贏。 五、“用戶側光(guang)伏,電網側儲能”配置應(ying)用場景: 在“用(yong)戶側(ce)建(jian)(jian)光伏(fu),電(dian)(dian)網(wang)側(ce)建(jian)(jian)儲(chu)能”基本硬件架構的基礎上,建(jian)(jian)設(she)“智慧平臺”,用(yong)戶隨時掌握電(dian)(dian)網(wang)供電(dian)(dian)情(qing)況、光伏(fu)發電(dian)(dian)情(qing)況、電(dian)(dian)站電(dian)(dian)量(liang)情(qing)況,可(ke)隨時選(xuan)擇電(dian)(dian)網(wang)供電(dian)(dian)或電(dian)(dian)站供電(dian)(dian),也可(ke)選(xuan)擇以合(he)適(shi)價格(ge)售出(chu)己(ji)有電(dian)(dian)池電(dian)(dian)量(liang)。 “智慧平臺”不(bu)僅(jin)包含(han)傳統意義的營配調,功能(neng)要(yao)求要(yao)賦(fu)予用戶(hu)參(can)與互動(dong)機會,建設(she)實時電(dian)(dian)(dian)(dian)力(li)交(jiao)易平臺,最(zui)(zui)終(zhong)構建“源網荷儲(chu)(chu)”四維融(rong)合互動(dong)新(xin)型電(dian)(dian)(dian)(dian)力(li)系統。它不(bu)僅(jin)是一個(ge)政策創(chuang)(chuang)新(xin),也是許多技術創(chuang)(chuang)新(xin)加以支持的系統創(chuang)(chuang)新(xin)。以“儲(chu)(chu)”為共(gong)(gong)有(you)交(jiao)匯點,用戶(hu)參(can)與電(dian)(dian)(dian)(dian)力(li)調度,交(jiao)易平臺上交(jiao)易儲(chu)(chu)能(neng)電(dian)(dian)(dian)(dian)站電(dian)(dian)(dian)(dian)量,實現(xian)用戶(hu)側成(cheng)(cheng)本最(zui)(zui)小化,效益最(zui)(zui)大(da)化。電(dian)(dian)(dian)(dian)網企業可(ke)根(gen)據(ju)協議(yi)價(jia)收購(gou)儲(chu)(chu)能(neng)電(dian)(dian)(dian)(dian)站“光伏溢(yi)出”電(dian)(dian)(dian)(dian)量,為公(gong)網供電(dian)(dian)(dian)(dian),平臺服務(wu)用戶(hu)之間(jian)電(dian)(dian)(dian)(dian)量交(jiao)易,實現(xian)電(dian)(dian)(dian)(dian)網側成(cheng)(cheng)本最(zui)(zui)小化,效益最(zui)(zui)大(da)化。最(zui)(zui)終(zhong)實現(xian)多方共(gong)(gong)贏(ying),全(quan)社會共(gong)(gong)贏(ying)。 應用(yong)場(chang)景一(yi):用(yong)戶租賃容量(liang)充(chong)滿(man),且已滿(man)足自用(yong)后(hou),多余電量(liang)可按(an)雙方簽訂協議(yi)供給(gei)公網,為用(yong)戶保底變現。 應用場景(jing)二:在光伏(fu)發電(dian)(dian)(dian)(dian)(dian)高(gao)峰(feng)時,且電(dian)(dian)(dian)(dian)(dian)網供(gong)電(dian)(dian)(dian)(dian)(dian)不為(wei)峰(feng)價時,選擇光伏(fu)電(dian)(dian)(dian)(dian)(dian)量存儲(chu),由電(dian)(dian)(dian)(dian)(dian)網供(gong)電(dian)(dian)(dian)(dian)(dian)。待(dai)電(dian)(dian)(dian)(dian)(dian)網供(gong)電(dian)(dian)(dian)(dian)(dian)為(wei)峰(feng)價時,可(ke)選擇存儲(chu)電(dian)(dian)(dian)(dian)(dian)量供(gong)電(dian)(dian)(dian)(dian)(dian)。由于(yu)存儲(chu)電(dian)(dian)(dian)(dian)(dian)量歸屬權為(wei)用戶,電(dian)(dian)(dian)(dian)(dian)網不收(shou)取電(dian)(dian)(dian)(dian)(dian)費(fei)。這樣可(ke)對清潔發電(dian)(dian)(dian)(dian)(dian)“跨(kua)時轉移”,降低用戶用電(dian)(dian)(dian)(dian)(dian)成本。 應(ying)用場景三:當增(zeng)量(liang)配電(dian)網(wang)外(wai)網(wang)電(dian)源(yuan)故障或計劃停電(dian),增(zeng)量(liang)配電(dian)網(wang)失去外(wai)部電(dian)源(yuan),此(ci)時,A、B、C、D等(deng)簽約(yue)用戶由(you)“儲(chu)能電(dian)站”經公網(wang)繼續供電(dian)。未簽約(yue)用戶供電(dian)開關自(zi)(zi)動(dong)跳(tiao)閘(zha)斷開,待外(wai)網(wang)電(dian)源(yuan)恢復后才能自(zi)(zi)動(dong)合閘(zha)接受電(dian)網(wang)供電(dian)。若故障時間較長,A用戶存儲(chu)電(dian)量(liang)耗盡,A用戶供電(dian)開關自(zi)(zi)動(dong)跳(tiao)閘(zha)。 應(ying)用(yong)(yong)場(chang)景四:接場(chang)景三外部故障,A用(yong)(yong)戶已耗盡(jin)自己的存(cun)儲(chu)電(dian)量(liang)(liang),B用(yong)(yong)戶沒(mei)有(you)使用(yong)(yong)或(huo)有(you)較多的電(dian)量(liang)(liang)富裕。經B同意,A用(yong)(yong)戶可通過競拍方(fang)式繼續獲得B用(yong)(yong)戶的存(cun)儲(chu)電(dian)量(liang)(liang),“電(dian)力銀行”作為交易平臺為雙方(fang)服務(wu),收取按電(dian)量(liang)(liang)電(dian)價(jia)計算的服務(wu)費(fei)。 應用(yong)場景五:增量配電(dian)企業自投光伏,電(dian)網電(dian)價(jia)(jia)平價(jia)(jia)時(shi)(shi)光伏發(fa)電(dian)存儲,電(dian)價(jia)(jia)峰時(shi)(shi)經公(gong)網進行(xing)轄區供電(dian),以實(shi)現效(xiao)益(yi)最大化。也可在外部電(dian)源(yuan)故障時(shi)(shi),結(jie)合應急供電(dian)車為(wei)特約用(yong)戶提供保電(dian)服(fu)務(wu)。 應(ying)用場景六:A用戶可(ke)以通過智慧交易平(ping)臺隨時選擇(ze)售(shou)出儲能電(dian)(dian)量(liang),所獲收益將高于(yu)現在光伏電(dian)(dian)量(liang)收購(gou)價(選擇(ze)在電(dian)(dian)網峰價時售(shou)出收益最高)。 應用(yong)場(chang)景按(an)具體運營情況,有(you)待后續(xu)補(bu)充更多場(chang)景。需要明確說(shuo)明的是,儲(chu)能投資方和電(dian)(dian)網企業收取的“容量(liang)租(zu)賃費(fei)”和“服(fu)務(wu)費(fei)”,不一定為現金(jin),也可按(an)電(dian)(dian)量(liang)折(zhe)算,如存(cun)儲(chu)A用(yong)戶2度電(dian)(dian),按(an)1.5度記賬,其中0.5度電(dian)(dian)折(zhe)算為服(fu)務(wu)費(fei)。 六、“源網荷儲”四維融(rong)合互(hu)動對各方的好處: (一(yi))對用戶(hu)好處(chu): 1.區別(bie)于以往(wang)光伏發電政策,余電不僅(jin)能(neng)變現,也能(neng)變電。 2.無需投資(zi)逆變(bian)(bian)設備,節省(sheng)用戶(hu)投資(zi),也省(sheng)卻(que)后期逆變(bian)(bian)設備維護(hu)費用。 3.自(zi)發(fa)自(zi)用電源經儲能平滑(hua)后,電源穩定。 4.用戶可以(yi)對(dui)供電電源有選擇權。 5.無(wu)需投(tou)資儲能,減少(shao)資金占有;“電力銀行”專業維護儲能電站,增加(jia)電站安全性(xing)。用戶(hu)隨時申請增加(jia)或減少(shao)租(zu)賃容量(liang),使用靈活性(xing)更高。 6.在電網外部電源故障期間,可不間斷獲得電力。 7.按(an)電力供應實時情況,用(yong)戶可以(yi)通過 “智慧平(ping)臺”,隨時自由(you)靈活(huo)處理存儲電量(liang)和(he)清(qing)潔發電電量(liang),實現效(xiao)益最(zui)大化。 8.擺脫場地限(xian)制(zhi)(zhi),可“無限(xian)制(zhi)(zhi)”按需增加儲(chu)能(neng)容量。 (二)對增量配(pei)電企業好處: 1.按需投(tou)資儲能,最大化降(jiang)低投(tou)資的(de)盲目性。 2.擺脫光(guang)伏(fu)投資(zi)的(de)場地限制,充分調動社會資(zi)源投資(zi)光(guang)伏(fu)發電(dian),有利于分布(bu)式發電(dian)推廣。 3.專業(ye)儲能(neng),保障儲能(neng)運行安全。高效(xiao)收集社會閑(xian)散發電(dian)資源,打(da)通(tong)清(qing)潔發電(dian)和清(qing)潔用電(dian)的通(tong)道。 4.增加公司業務范圍(wei),擺脫電價政策限定(ding),儲能(neng)供電變為電力服(fu)務。 5.可通過公網為用戶提供(gong)異(yi)地(di)保電服務。 6.儲能設施價值將(jiang)得(de)到最大化利用。 a/響(xiang)應清潔發(fa)電就地消(xiao)納(na)政策; b/延緩(huan)變電(dian)站容量(liang)投資; c/減少向上級(ji)電(dian)網繳納(na)的容量電(dian)費(fei); d/增強電(dian)網供電(dian)可靠(kao)性; e/可參與上(shang)級電(dian)網調(diao)頻調(diao)峰(feng)行(xing)動,同時獲得峰(feng)谷(gu)差價; 7.構(gou)建的電(dian)力交易平臺,必然(ran)保有買賣雙方(fang)的結算資金(jin)(jin),在發展到一(yi)定(ding)階段,“智慧平臺”必然(ran)會拓展出金(jin)(jin)融(rong)業務,具有金(jin)(jin)融(rong)屬性。 8. 相對從上級電網買入的(de)電價,增量配電企業可以以更低的(de)價格買入用戶(hu)儲能電站的(de)電量,按政(zheng)策(ce)電價售(shou)出,獲得利益最大(da)化。 七、“源網荷(he)儲”四維融(rong)合互動進一步分析 在當前(qian)(qian)“碳達峰(feng)碳中和”的(de)大背景下(xia),發展清(qing)潔能(neng)源既是(shi)歷(li)史使(shi)命(ming),也是(shi)歷(li)史必然,構(gou)建“源網荷儲(chu)”四維融合互(hu)(hu)動新(xin)型電力系(xi)統是(shi)電力革命(ming)的(de)必由之路。“儲(chu)”必須(xu)是(shi)獨(du)立一方,擺脫以前(qian)(qian)的(de)依(yi)附性(xing),才有資(zi)(zi)(zi)(zi)格有能(neng)力和“源”、“網”、“荷”三者互(hu)(hu)動。當前(qian)(qian)儲(chu)能(neng)投(tou)(tou)資(zi)(zi)(zi)(zi)主要是(shi)依(yi)靠政策強令(ling)投(tou)(tou)資(zi)(zi)(zi)(zi)或企業責任(ren)投(tou)(tou)資(zi)(zi)(zi)(zi),而(er)缺(que)少因利益(yi)而(er)投(tou)(tou)資(zi)(zi)(zi)(zi)。只(zhi)有設立互(hu)(hu)動機制,讓(rang)儲(chu)能(neng)投(tou)(tou)資(zi)(zi)(zi)(zi)成為可(ke)獲(huo)利投(tou)(tou)資(zi)(zi)(zi)(zi),才能(neng)贏得社會資(zi)(zi)(zi)(zi)本青睞,反過(guo)來(lai)也會促(cu)進儲(chu)能(neng)各方面健康(kang)成長。 目(mu)前儲(chu)能建設(she)和(he)運營成本(ben)雖然居高不下,但(dan)業已發展到一定階段,具有一定的經濟(ji)性(xing)。相信隨(sui)著儲(chu)能技術的進一步發展,儲(chu)能成本(ben)的進一步下降(jiang),儲(chu)能必然會邁(mai)過商業化(hua)門檻,不僅安全可用(yong),而(er)且經濟(ji)適用(yong)。當下時,建設(she)“源網(wang)荷儲(chu)”四(si)維融(rong)合互(hu)動(dong)新型電力系(xi)統也(ye)是迫在(zai)眉睫(jie)。在(zai)建設(she)應(ying)用(yong)示范項目(mu)時,作為儲(chu)能和(he)智慧平臺架設(she)方,應(ying)積(ji)極爭取政策扶持著眼(yan)未來,打造“源網(wang)荷儲(chu)”四(si)維融(rong)合互(hu)動(dong)新型電力系(xi)統。 同時,“源網(wang)荷儲”四維融合互動新型電力(li)系(xi)統(tong)也可積極為清潔能源發(fa)電、為全社會最大化(hua)減排(pai)助力(li),為供需雙(shuang)方(fang)履行社會責任布設有利環(huan)境。 八(ba)、“源網荷儲”四(si)維融(rong)合互動新型電(dian)力系統對增量配電(dian)企業的意(yi)義 增量(liang)(liang)配(pei)電企(qi)業相(xiang)對于(yu)上級電網企(qi)業,在(zai)規(gui)模上不能與(yu)之相(xiang)提并論,如果拘泥(ni)于(yu)傳統供電服務,并以此對標,永遠(yuan)無法與(yu)之相(xiang)媲美。再(zai)者,國(guo)家進行增量(liang)(liang)配(pei)電電力改革,目(mu)的不是再(zai)造一(yi)個傳統供電局,而是希望增量(liang)(liang)配(pei)電企(qi)業以大電網為依托(tuo),發展出有利于(yu)清潔能源利用的商業模式(shi)。 這(zhe)種“源(yuan)(yuan)網(wang)荷(he)儲”四維融(rong)合互(hu)動(dong)新型電(dian)(dian)(dian)力(li)(li)(li)系統有所區(qu)別于(yu)傳統電(dian)(dian)(dian)力(li)(li)(li)系統,通過智(zhi)慧平臺實(shi)現“源(yuan)(yuan)網(wang)荷(he)儲”互(hu)聯互(hu)通,打造真正的智(zhi)慧電(dian)(dian)(dian)網(wang)、數字電(dian)(dian)(dian)網(wang),提高(gao)清潔能源(yuan)(yuan)使用(yong)面積,有效降低用(yong)戶用(yong)電(dian)(dian)(dian)成本。僅就就增(zeng)量(liang)配電(dian)(dian)(dian)企業而(er)言,與其建設傳統電(dian)(dian)(dian)力(li)(li)(li)系統,不如先(xian)行一(yi)步,利(li)用(yong)上級電(dian)(dian)(dian)網(wang)托底優勢,發展新型電(dian)(dian)(dian)力(li)(li)(li)系統,既可(ke)為(wei)增(zeng)量(liang)配電(dian)(dian)(dian)企業探(tan)索生(sheng)存(cun)之道,為(wei)電(dian)(dian)(dian)力(li)(li)(li)改(gai)革(ge)做有益(yi)嘗試,也可(ke)為(wei)國家“雙碳(tan)”目標做出實(shi)實(shi)在在貢獻。 |
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