智(zhi)能(neng)電網是一項集計算機技(ji)術、數據傳輸、控制(zhi)技(ji)術、現代化(hua)設備(bei)(bei)及管理(li)于(yu)一體(ti)的綜合信息管理(li)系統(tong),通常習(xi)慣稱為(wei)電網自動化(hua)系統(tong)。智(zhi)能(neng)電網建(jian)設的主(zhu)要任(ren)務是重點(dian)推(tui)進(jin)智(zhi)能(neng)化(hua)電氣(qi)設備(bei)(bei)裝備(bei)(bei)推(tui)廣應用,實現電網管理(li)過程(cheng)自動化(hua)、智(zhi)能(neng)化(hua),帶動電網設備(bei)(bei)整(zheng)體(ti)技(ji)術水平的提(ti)升(sheng)。
1、智能(neng)化電(dian)氣裝備是智能(neng)電(dian)網建設的(de)基礎
(1)智能(neng)裝備是(shi)將機器、人、控(kong)制系(xi)統與信息系(xi)統有效連(lian)接(jie)的網(wang)絡(luo)信息系(xi)統,一定要具備感知能(neng)力、認知能(neng)力和行(xing)動能(neng)力。
(2)智(zhi)能裝備是(shi)對工業數據的(de)全面深度感知,對動態傳(chuan)輸與(yu)高級建模分(fen)析有(you)更(geng)快的(de)認知能力,從而形(xing)成智(zhi)能決策與(yu)控制(zhi),驅動智(zhi)能裝備制(zhi)造業的(de)向全面智(zhi)能化(hua)發(fa)展。
(3)智(zhi)(zhi)(zhi)能制(zhi)造(zao)核心理(li)念,將“精(jing)益理(li)念、智(zhi)(zhi)(zhi)能制(zhi)造(zao)系統、物聯網集成、智(zhi)(zhi)(zhi)能裝備”進(jin)行(xing)全方位的整合集成,并從(cong)“數(shu)據(ju)的采集和(he)處(chu)理(li)”、“人-機(ji)、機(ji)-機(ji)通訊”、“從(cong)數(shu)據(ju)、信息到決策”、“邁向預測型智(zhi)(zhi)(zhi)能制(zhi)造(zao)”四個層面進(jin)行(xing)實(shi)施
2、智能電網概念
智能電(dian)(dian)網(wang)就是電(dian)(dian)網(wang)的智能化;是建立在高速(su)通信網(wang)絡的基礎(chu)上(shang)(shang),通過先進的傳感(gan)器(qi)和(he)測(ce)量(liang)技術把電(dian)(dian)氣(qi)設(she)備終(zhong)端節(jie)點上(shang)(shang)的各種信息(xi)采集回來,也就是把電(dian)(dian)網(wang)線路分段(duan)的運(yun)(yun)行狀(zhuang)態,反映到電(dian)(dian)腦顯示屏上(shang)(shang)面,再(zai)運(yun)(yun)用計(ji)算機(ji)技術對網(wang)絡的運(yun)(yun)行狀(zhuang)態遠程控制(zhi),實現電(dian)(dian)網(wang)的安全、可靠、高效、經濟的運(yun)(yun)行。
在電(dian)網(wang)(wang)(wang)(wang)的(de)(de)網(wang)(wang)(wang)(wang)絡(luo)結(jie)(jie)構(gou)中,供電(dian)線路(lu)(lu)(lu)的(de)(de)電(dian)纜(lan)把(ba)電(dian)力輸送到用戶端(duan),線路(lu)(lu)(lu)結(jie)(jie)構(gou)(線路(lu)(lu)(lu)管(guan)(guan)道(dao))和電(dian)氣設備之間形成電(dian)路(lu)(lu)(lu)。每(mei)一段電(dian)路(lu)(lu)(lu)稱(cheng)為網(wang)(wang)(wang)(wang)絡(luo)鏈(lian)路(lu)(lu)(lu)的(de)(de)端(duan)點(dian)(dian)或網(wang)(wang)(wang)(wang)絡(luo)中的(de)(de)節點(dian)(dian)(二條或多條鏈(lian)路(lu)(lu)(lu)的(de)(de)公共結(jie)(jie)合點(dian)(dian)),在網(wang)(wang)(wang)(wang)絡(luo)系統的(de)(de)運行中是(shi)可以隨時改(gai)變結(jie)(jie)構(gou)的(de)(de),鏈(lian)路(lu)(lu)(lu)會根(gen)據(ju)需要不(bu)得的(de)(de)變換結(jie)(jie)構(gou)形態。如(ru)果這種(zhong)改(gai)變是(shi)運用人(ren)工智能技術而發生的(de)(de)改(gai)變,稱(cheng)網(wang)(wang)(wang)(wang)絡(luo)為智能化網(wang)(wang)(wang)(wang)絡(luo)。在計(ji)(ji)算(suan)機(ji)上對電(dian)網(wang)(wang)(wang)(wang)管(guan)(guan)理(li)(li)(li)也就(jiu)是(shi)對控制(zhi)節點(dian)(dian)的(de)(de)管(guan)(guan)理(li)(li)(li),網(wang)(wang)(wang)(wang)絡(luo)上的(de)(de)控制(zhi)節點(dian)(dian)越(yue)(yue)多,需要處理(li)(li)(li)的(de)(de)信息量也就(jiu)越(yue)(yue)大。電(dian)網(wang)(wang)(wang)(wang)不(bu)管(guan)(guan)是(shi)人(ren)工管(guan)(guan)理(li)(li)(li)還(huan)是(shi)計(ji)(ji)算(suan)機(ji)管(guan)(guan)理(li)(li)(li)都離不(bu)開網(wang)(wang)(wang)(wang)絡(luo)的(de)(de)結(jie)(jie)構(gou)形態。在人(ren)工管(guan)(guan)理(li)(li)(li)時只需要有線路(lu)(lu)(lu)結(jie)(jie)線圖就(jiu)可以,但是(shi)計(ji)(ji)算(suan)機(ji)管(guan)(guan)理(li)(li)(li)下還(huan)必須有帶(dai)方向的(de)(de)網(wang)(wang)(wang)(wang)絡(luo)圖。
3、電網結(jie)線(xian)圖(電網結(jie)構)
復雜的(de)(de)(de)配(pei)電網結構(gou)經常在變(bian)化(hua)只能用計算機來計算。規(gui)定(ding)由節(jie)(jie)點流(liu)(liu)出的(de)(de)(de)電流(liu)(liu)為(wei)正,流(liu)(liu)入節(jie)(jie)點的(de)(de)(de)電流(liu)(liu)為(wei)負;選定(ding)回(hui)路的(de)(de)(de)繞行(xing)方(fang)向,在回(hui)路的(de)(de)(de)繞行(xing)方(fang)向上,電勢降為(wei)正值(zhi)(zhi),電勢升為(wei)負值(zhi)(zhi);
數字(zi)化(hua)電網(wang)(wang)系統;是(shi)指把(ba)(ba)二次(ci)系統測量到的(de)(de)模擬(ni)信號轉化(hua)為數字(zi)信號,并且以數字(zi)1、0的(de)(de)形式在計(ji)算機上(shang)顯示出(chu)電網(wang)(wang)線路結構(gou)的(de)(de)系統。建(jian)立數字(zi)化(hua)電網(wang)(wang)是(shi)為了把(ba)(ba)原(yuan)來需要大(da)量人工(gong)的(de)(de)現(xian)場(chang)測量和現(xian)場(chang)操作(zuo)直接在控制室(shi)的(de)(de)計(ji)算機上(shang)實現(xian)。
電(dian)(dian)(dian)(dian)力(li)(li)系(xi)(xi)(xi)統(tong)在運(yun)行時,在電(dian)(dian)(dian)(dian)源電(dian)(dian)(dian)(dian)勢激勵作用下(xia),電(dian)(dian)(dian)(dian)流或功(gong)(gong)率從電(dian)(dian)(dian)(dian)源通過系(xi)(xi)(xi)統(tong)各元(yuan)件(jian)流入負(fu)荷,分(fen)布于(yu)電(dian)(dian)(dian)(dian)力(li)(li)網絡(luo)線路(lu)(lu)的(de)(de)各個負(fu)荷點,稱為電(dian)(dian)(dian)(dian)力(li)(li)潮流方向,電(dian)(dian)(dian)(dian)流流入為負(fu),電(dian)(dian)(dian)(dian)流流程為正。用標準模(mo)型和(he)參(can)數對照評價(jia)線路(lu)(lu)的(de)(de)優劣性的(de)(de)設計(ji)方法。評價(jia)目前系(xi)(xi)(xi)統(tong)的(de)(de)負(fu)荷量(liang)、損(sun)失、電(dian)(dian)(dian)(dian)壓降等,重新調整常時開放點的(de)(de)開關位置,以達到電(dian)(dian)(dian)(dian)量(liang)損(sun)失最小化(hua)和(he)線路(lu)(lu)負(fu)荷承(cheng)載率平均(jun)化(hua)。分(fen)布式(shi)結(jie)構的(de)(de)每一個對等網絡(luo)管理(li)都(dou)有各自(zi)的(de)(de)獨立功(gong)(gong)能。可以分(fen)別(bie)執行多種任(ren)務,監(jian)管功(gong)(gong)能也是分(fen)布的(de)(de)。通過任(ren)何(he)網絡(luo)系(xi)(xi)(xi)統(tong)都(dou)能獲得所(suo)有的(de)(de)網絡(luo)信息、警報和(he)事件(jian)。
分布式網(wang)絡:其特點是(shi)任何一個節(jie)點都至(zhi)少跟其他(ta)兩個節(jie)點直接相連(lian),具有更高的(de)(de)(de)可(ke)靠性。數(shu)字(zi)(zi)化(hua)電(dian)網(wang)線(xian)路(lu)(lu)(lu)顯示系(xi)(xi)統(tong)是(shi)把模(mo)擬表的(de)(de)(de)數(shu)字(zi)(zi)轉化(hua)為數(shu)字(zi)(zi)信(xin)息,由(you)手工抄表變(bian)為數(shu)字(zi)(zi)信(xin)號傳遞(di),而且能夠(gou)在液晶屏幕上顯示出線(xian)路(lu)(lu)(lu)結構(gou)和運行(xing)狀態。標準化(hua)配網(wang)線(xian)路(lu)(lu)(lu)的(de)(de)(de)模(mo)塊(kuai)化(hua)設計(ji)方(fang)法,是(shi)指把變(bian)電(dian)站的(de)(de)(de)某(mou)一回路(lu)(lu)(lu)的(de)(de)(de)結構(gou)做出明確的(de)(de)(de)定(ding)義,再找(zhao)出這一線(xian)路(lu)(lu)(lu)的(de)(de)(de)關聯線(xian)路(lu)(lu)(lu),分析當線(xian)路(lu)(lu)(lu)結構(gou)變(bian)化(hua)時,對(dui)其他(ta)線(xian)路(lu)(lu)(lu)造成(cheng)的(de)(de)(de)影響程度。用標準模(mo)型和參(can)數(shu)對(dui)照評價線(xian)路(lu)(lu)(lu)的(de)(de)(de)優劣性的(de)(de)(de)設計(ji)方(fang)法。評價目前(qian)系(xi)(xi)統(tong)的(de)(de)(de)負(fu)荷(he)量、損失、電(dian)壓降(jiang)等,重新調整(zheng)常時開放(fang)點的(de)(de)(de)開關位(wei)置(zhi),以達到電(dian)量損失最小化(hua)和線(xian)路(lu)(lu)(lu)負(fu)荷(he)承載率平(ping)均化(hua)。
集中(zhong)式(shi)網(wang)絡(luo):利用線路和(he)節(jie)點設(she)(she)備將(jiang)分散的并獨立存(cun)在網(wang)絡(luo),利用系統(tong)的功能相互連接起來,實現資(zi)源共享。將(jiang)分布在不同(tong)地方的多臺(tai)設(she)(she)備連接形成一(yi)個集合(he)。
4、配網(wang)自動化就是(shi)供電(dian)線(xian)路結構(gou)變化實現智能化和自動化
配(pei)電網自動化是以一次(ci)供電線路網架和(he)(he)和(he)(he)現(xian)場開(kai)關設(she)備(bei)為基礎,以配(pei)電網自動化軟件系(xi)統為中心(xin),綜合利用通信方(fang)式,通過二次(ci)終端設(she)備(bei)的(de)應用系(xi)統集成(cheng)開(kai)關柜信息(xi),實現(xian)遠程對配(pei)電網絡(luo)的(de)監(jian)測(ce)與控制(zhi),實現(xian)對供電故(gu)障(zhang)的(de)快速反應,迅速處理(li)故(gu)障(zhang),及時恢復供電。
線(xian)(xian)路(lu)可靠(kao)性(xing)(xing)是由線(xian)(xian)路(lu)結(jie)構(gou)(gou)決定的(de)(de),假(jia)如(ru)一(yi)個(ge)用(yong)戶(hu)的(de)(de)設(she)備出(chu)現故(gu)障(zhang)(zhang)造(zao)成了停電(dian)(dian)(dian),供(gong)(gong)(gong)電(dian)(dian)(dian)單(dan)(dan)位(wei)就(jiu)要考(kao)慮(lv)切除故(gu)障(zhang)(zhang),迂回(hui)線(xian)(xian)路(lu)盡快回(hui)復供(gong)(gong)(gong)電(dian)(dian)(dian)。在(zai)不能(neng)迂回(hui)供(gong)(gong)(gong)電(dian)(dian)(dian)的(de)(de)情況下,就(jiu)應該縮小(xiao)停電(dian)(dian)(dian)的(de)(de)區間,及時的(de)(de)恢(hui)復供(gong)(gong)(gong)電(dian)(dian)(dian)。評價線(xian)(xian)路(lu)可靠(kao)性(xing)(xing)時經常采(cai)用(yong)通(tong)用(yong)的(de)(de)標準(zhun),也(ye)就(jiu)是“N-1””N-2””N-3”標準(zhun)。許多技術(shu)人員一(yi)提(ti)到配網(wang)自(zi)動化系統設(she)計,首先就(jiu)要簡化供(gong)(gong)(gong)電(dian)(dian)(dian)網(wang)網(wang)架結(jie)構(gou)(gou)。實際上(shang)是要按照實際線(xian)(xian)路(lu)情況,通(tong)過(guo)自(zi)動化建(jian)設(she)來適應目前的(de)(de)結(jie)構(gou)(gou)。自(zi)動化遠程操作只有(you)在(zai)單(dan)(dan)線(xian)(xian)圖(tu)上(shang)操作不出(chu)問題,供(gong)(gong)(gong)電(dian)(dian)(dian)線(xian)(xian)路(lu)一(yi)旦(dan)敷(fu)設(she)后,線(xian)(xian)路(lu)連接(jie)的(de)(de)絕對位(wei)置不會改(gai)(gai)變(bian)(bian)(bian)了,但是通(tong)過(guo)開關柜不同的(de)(de)間隔(ge)分(fen)合會改(gai)(gai)變(bian)(bian)(bian)潮(chao)流的(de)(de)方(fang)向(xiang),電(dian)(dian)(dian)流方(fang)向(xiang)改(gai)(gai)變(bian)(bian)(bian)了線(xian)(xian)路(lu)的(de)(de)走(zou)向(xiang)的(de)(de)先后順序也(ye)改(gai)(gai)變(bian)(bian)(bian)了,網(wang)絡結(jie)構(gou)(gou)的(de)(de)單(dan)(dan)線(xian)(xian)結(jie)構(gou)(gou)圖(tu)跟著(zhu)改(gai)(gai)變(bian)(bian)(bian)。
智(zhi)能(neng)電(dian)網(wang)建設推動配電(dian)網(wang)基礎設施升(sheng)級,提(ti)升(sheng)電(dian)網(wang)智(zhi)能(neng)化管(guan)理(li)水平(ping)。配網(wang)供電(dian)線(xian)路最終連(lian)接到千家萬戶的(de)電(dian)器上。提(ti)高(gao)電(dian)網(wang)供電(dian)線(xian)路運行的(de)安全可靠性,降低電(dian)網(wang)線(xian)路損耗,提(ti)高(gao)用戶終端的(de)供電(dian)質量(liang)是(shi)智(zhi)能(neng)電(dian)網(wang)建設的(de)基本目標。優化供電(dian)線(xian)路結構直接影(ying)響電(dian)網(wang)的(de)供電(dian)可靠性。
城市配電網線(xian)(xian)(xian)路多、結(jie)構(gou)復雜。線(xian)(xian)(xian)路結(jie)構(gou)在(zai)人工管理方式下,不能夠經(jing)常改變(bian)線(xian)(xian)(xian)路結(jie)構(gou),越是簡單的線(xian)(xian)(xian)路結(jie)構(gou)管理越容易。
5、配網自動化(hua)工程建(jian)設
實施智能電(dian)網(wang)(wang)(wang)建(jian)(jian)設(she)(she)和配(pei)電(dian)網(wang)(wang)(wang)自(zi)動化(hua)工程之前(qian),做好供電(dian)網(wang)(wang)(wang)絡的優化(hua)設(she)(she)計工作(zuo),按照標準化(hua)模型(xing)規(gui)劃設(she)(she)計配(pei)電(dian)網(wang)(wang)(wang)絡。結合網(wang)(wang)(wang)架建(jian)(jian)設(she)(she)的發展規(gui)劃,因地制宜地針對每一條線(xian)(xian)路(lu)的實際現(xian)狀,選擇線(xian)(xian)路(lu)控制模式,避免(mian)因網(wang)(wang)(wang)架結構不(bu)穩定(ding),引起配(pei)網(wang)(wang)(wang)自(zi)動化(hua)系統技術錯位,影響系統建(jian)(jian)設(she)(she)質量(liang),造成項目(mu)投資極大的浪費(fei)。現(xian)階段(duan)配(pei)電(dian)網(wang)(wang)(wang)的結構主要有三(san)種:
(1)放射型線(xian)(xian)(xian)路結構(gou),供電線(xian)(xian)(xian)路從變電站(zhan)饋出(chu)直接到用(yong)戶(hu)端(duan),線(xian)(xian)(xian)路上還要串接出(chu)很多的(de)中間(jian)用(yong)戶(hu),這種結構(gou)簡單線(xian)(xian)(xian)路故(gu)障點也容(rong)易查找。放射性線(xian)(xian)(xian)路上的(de)開關以斷路器為主,進行分斷保護,一(yi)家用(yong)戶(hu)故(gu)障時就跳(tiao)開開關,不至于造成全(quan)線(xian)(xian)(xian)路停電。
(2)“手拉(la)手”型簡單環網結構,就是(shi)在兩條饋線(xian)中(zhong)間(jian)增加一臺聯絡(luo)開(kai)關,故(gu)障時(shi)能夠實現轉供(gong)。
(3)多(duo)(duo)分(fen)段多(duo)(duo)聯絡(網(wang)格型(xing))線路(lu)結構(gou),多(duo)(duo)條線路(lu)直接有(you)多(duo)(duo)個聯絡點(dian),當一個節(jie)點(dian)故(gu)障時(shi),可以有(you)選擇的(de)從多(duo)(duo)條線路(lu)上轉供電。這種形(xing)式的(de)電網(wang)結構(gou)適應分(fen)段負荷開關和聯絡開關,盡量不采用斷路(lu)器開關。
通過配(pei)(pei)(pei)電(dian)(dian)(dian)(dian)網(wang)線(xian)路及開關設備(bei)的(de)(de)(de)(de)優化(hua)設計,可以將負(fu)(fu)荷(he)從(cong)重負(fu)(fu)載(zai)甚至是過負(fu)(fu)載(zai)線(xian)路轉移(yi)到輕負(fu)(fu)載(zai)饋線(xian)上,這種轉移(yi)提(ti)高了饋線(xian)的(de)(de)(de)(de)平均負(fu)(fu)荷(he)率,增強了配(pei)(pei)(pei)電(dian)(dian)(dian)(dian)網(wang)的(de)(de)(de)(de)供(gong)(gong)電(dian)(dian)(dian)(dian)能力;在(zai)(zai)配(pei)(pei)(pei)電(dian)(dian)(dian)(dian)網(wang)受(shou)到小(xiao)的(de)(de)(de)(de)擾動時(shi),判(pan)斷故障(zhang)(zhang)區域,隔(ge)離故障(zhang)(zhang)區域,恢復受(shou)故障(zhang)(zhang)影(ying)響的(de)(de)(de)(de)健全(quan)區域供(gong)(gong)電(dian)(dian)(dian)(dian),從(cong)而縮(suo)短(duan)停電(dian)(dian)(dian)(dian)時(shi)間,減少停電(dian)(dian)(dian)(dian)面(mian)積,提(ti)高供(gong)(gong)電(dian)(dian)(dian)(dian)可靠性(xing)。在(zai)(zai)正常運(yun)行情況下,通過監視(shi)配(pei)(pei)(pei)網(wang)運(yun)行工況,優化(hua)配(pei)(pei)(pei)網(wang)運(yun)行方式;并(bing)在(zai)(zai)配(pei)(pei)(pei)電(dian)(dian)(dian)(dian)網(wang)受(shou)到災害性(xing)影(ying)響時(shi)(如失(shi)去主力電(dian)(dian)(dian)(dian)源,失(shi)去進線(xian),變電(dian)(dian)(dian)(dian)站(zhan)母線(xian)故障(zhang)(zhang)等(deng)),在(zai)(zai)不威脅供(gong)(gong)電(dian)(dian)(dian)(dian)安全(quan)的(de)(de)(de)(de)前提(ti)下將受(shou)影(ying)響的(de)(de)(de)(de)負(fu)(fu)荷(he)轉移(yi)到非故障(zhang)(zhang)線(xian)路,使一次網(wang)絡具(ju)備(bei)轉供(gong)(gong)電(dian)(dian)(dian)(dian)途徑和轉供(gong)(gong)電(dian)(dian)(dian)(dian)操作方案。
根據(ju)運行(xing)數(shu)據(ju)合理控制潮流分布、無功負荷(he)和電(dian)(dian)壓水平(ping),降(jiang)低配(pei)電(dian)(dian)網線(xian)損和提高電(dian)(dian)壓品質(zhi)和改善(shan)供電(dian)(dian)品質(zhi),達到經濟(ji)運行(xing)目(mu)的(de);
6、配網(wang)自(zi)動化建設主要(yao)內容
(1)配電網線路結(jie)構標準化設(she)計
(2)開(kai)關操作機(ji)構升(sheng)級為電動操作
(3)開關柜升(sheng)級改造
(4)采用(yong)自(zi)動化成(cheng)套開(kai)關設(she)備
(5)配網自(zi)動化信息系統建(jian)設