本(ben)發明(ming)涉(she)及(ji)電力(li)技術領域,具體涉(she)及(ji)一種基于電表數據的用(yong)戶電壓暫降事故檢測方(fang)法。
背景技術:
電(dian)壓(ya)暫降是(shi)指供(gong)電(dian)電(dian)壓(ya)有效值(zhi)快速下降到額(e)定值(zhi)的(de)(de)(de)(de)(de)90%~10%,持續時間在0.01s~1min之間的(de)(de)(de)(de)(de)情況。作為目前(qian)最突出(chu)的(de)(de)(de)(de)(de)電(dian)能質量問題(ti)之一,電(dian)壓(ya)暫降會導致(zhi)微(wei)機數(shu)字控制器(qi)、交(jiao)流接觸器(qi)、低(di)壓(ya)脫扣(kou)器(qi)等(deng)敏感設備不正常工(gong)作、重啟甚至停(ting)運,造成(cheng)產品報廢生產中斷,給(gei)用(yong)戶(hu)(hu)帶來巨大(da)損(sun)失(shi)(shi)。據統計,在歐美地區(qu)由于(yu)電(dian)壓(ya)暫降問題(ti)引起的(de)(de)(de)(de)(de)投(tou)訴占電(dian)能質量問題(ti)投(tou)訴量的(de)(de)(de)(de)(de)80%以上(shang),每年由于(yu)電(dian)壓(ya)暫降所引起的(de)(de)(de)(de)(de)經濟損(sun)失(shi)(shi)高達數(shu)百億美元。在國內(nei),電(dian)壓(ya)暫降問題(ti)也是(shi)工(gong)業(ye)用(yong)戶(hu)(hu),尤(you)其(qi)是(shi)高新技(ji)術產業(ye)用(yong)戶(hu)(hu)的(de)(de)(de)(de)(de)關注重點(dian)。因(yin)此,對(dui)用(yong)戶(hu)(hu)側(ce)的(de)(de)(de)(de)(de)電(dian)壓(ya)暫降問題(ti)進行(xing)監測和治理能夠幫助供(gong)電(dian)企業(ye)提高供(gong)電(dian)質量,爭取工(gong)業(ye)大(da)用(yong)戶(hu)(hu)。
電(dian)(dian)壓(ya)暫(zan)(zan)降(jiang)事(shi)件持續時(shi)間短,殘壓(ya)不(bu)為(wei)零,對監(jian)(jian)測(ce)(ce)設(she)備的(de)(de)(de)精(jing)度要求較高,用(yong)戶(hu)側計量(liang)電(dian)(dian)表或普(pu)通監(jian)(jian)測(ce)(ce)裝置無(wu)法(fa)全(quan)面監(jian)(jian)測(ce)(ce)電(dian)(dian)壓(ya)暫(zan)(zan)降(jiang)。而(er)電(dian)(dian)能(neng)質量(liang)監(jian)(jian)測(ce)(ce)設(she)備成本較高,經濟(ji)性差(cha),用(yong)戶(hu)裝設(she)比例(li)低,短時(shi)間內難以(yi)實現(xian)大范圍推廣。可見,現(xian)有(you)的(de)(de)(de)電(dian)(dian)網監(jian)(jian)測(ce)(ce)系(xi)統和電(dian)(dian)能(neng)質量(liang)監(jian)(jian)測(ce)(ce)設(she)備都暫(zan)(zan)時(shi)無(wu)法(fa)完成對大量(liang)用(yong)戶(hu)進行用(yong)戶(hu)側電(dian)(dian)壓(ya)暫(zan)(zan)降(jiang)事(shi)故監(jian)(jian)測(ce)(ce)的(de)(de)(de)任務,用(yong)戶(hu)側電(dian)(dian)壓(ya)暫(zan)(zan)降(jiang)事(shi)故的(de)(de)(de)發現(xian)和治理(li)往往只能(neng)靠用(yong)戶(hu)投訴(su)驅動(dong),不(bu)便于供電(dian)(dian)企業開展電(dian)(dian)能(neng)質量(liang)提升治理(li)工作,存在(zai)局限性。另外,智能(neng)電(dian)(dian)表的(de)(de)(de)大范圍普(pu)及(ji)提供了大量(liang)的(de)(de)(de)用(yong)戶(hu)數(shu)(shu)據(ju)(ju)(ju),但這些(xie)數(shu)(shu)據(ju)(ju)(ju)尚未有(you)效(xiao)利(li)(li)用(yong)。為(wei)此,亟須提出一種利(li)(li)用(yong)現(xian)有(you)設(she)備水平和用(yong)戶(hu)數(shu)(shu)據(ju)(ju)(ju)資源實現(xian)用(yong)戶(hu)側電(dian)(dian)壓(ya)暫(zan)(zan)降(jiang)問題檢(jian)測(ce)(ce)的(de)(de)(de)方法(fa),以(yi)指導配電(dian)(dian)網可靠性提升和電(dian)(dian)能(neng)質量(liang)治理(li)工作。
技術實現要素:
為了(le)克(ke)服現(xian)有監(jian)測設備難以實現(xian)大量(liang)用(yong)戶(hu)進(jin)行電(dian)壓(ya)暫降事故監(jian)測,本發明提供一(yi)種基于電(dian)表數據的(de)用(yong)戶(hu)電(dian)壓(ya)暫降事故檢測方(fang)法。
本(ben)發明(ming)采用如下技術(shu)方案:
一種(zhong)基于電表(biao)數據(ju)的用(yong)戶電壓暫降事(shi)故檢測方法,包括如下步驟:
s1:以3min為間(jian)隔(ge),通過用(yong)戶(hu)側電(dian)能表采集(ji)并記(ji)錄配(pei)電(dian)網中(zhong)每個用(yong)戶(hu)的(de)電(dian)量數據,計算用(yong)戶(hu)每個時段的(de)用(yong)電(dian)量,間(jian)隔(ge)時間(jian)也(ye)可以取1min或2min;
s2:對用(yong)(yong)戶用(yong)(yong)電量數據進行(xing)歸一(yi)化(hua)處(chu)理,得出標準(zhun)化(hua)的用(yong)(yong)戶日用(yong)(yong)電量曲線;
s3:基于歷(li)史數據選(xuan)取各用戶的(de)典型(xing)日用電量曲線,并根(gen)據用戶行(xing)業(ye)特點制定特殊用電場景(jing)庫;
s4:基(ji)于與典型日(ri)用(yong)電(dian)(dian)量曲線的(de)比對,考(kao)慮特殊(shu)用(yong)電(dian)(dian)場(chang)景的(de)辨別(bie)需求建立場(chang)景檢(jian)測指標體系(xi);
s5:根據(ju)電表數據(ju)特(te)(te)征和檢測(ce)指標的差異,形(xing)成(cheng)特(te)(te)殊用電場景庫的場景區(qu)分判斷標準;
s6:基于用(yong)戶(hu)電(dian)表數據(ju),通過場景(jing)判(pan)斷(duan)標準(zhun)檢測用(yong)戶(hu)發生用(yong)電(dian)量意外驟降情況(kuang)是(shi)否由電(dian)壓暫降引起。
所述(shu)步驟s1提(ti)及的(de)用(yong)戶每(mei)個(ge)(ge)時段的(de)用(yong)電(dian)(dian)量,具體計(ji)算方法為(wei):設(she)定電(dian)(dian)量數(shu)據采集間(jian)隔為(wei)3min,配電(dian)(dian)網中第(di)(di)(di)(di)i個(ge)(ge)用(yong)戶在(zai)第(di)(di)(di)(di)j(j=1,2,…,480)個(ge)(ge)采集時間(jian)點的(de)電(dian)(dian)量為(wei)qij,則該用(yong)戶在(zai)第(di)(di)(di)(di)j個(ge)(ge)時段的(de)用(yong)電(dian)(dian)量qij是指用(yong)戶第(di)(di)(di)(di)j個(ge)(ge)時間(jian)點與第(di)(di)(di)(di)j-1個(ge)(ge)時間(jian)點的(de)電(dian)(dian)量差,計(ji)算公式為(wei):qij=qij-qij-1。
所述步驟s2提(ti)及的用電(dian)量(liang)數據歸一(yi)化處理,具(ju)體(ti)計算公式為:
式中:qij’表示第i個用(yong)(yong)戶歸一化處(chu)理后的用(yong)(yong)電量,max{qij}表示第i個用(yong)(yong)戶在一天所(suo)有時段中的最大用(yong)(yong)電量。
所述步驟s2提及(ji)的(de)(de)標準(zhun)化的(de)(de)用(yong)戶日用(yong)電量曲(qu)線(xian),具體是指:以時間(jian)為橫坐(zuo)標,用(yong)電量為縱(zong)坐(zuo)標,根據一(yi)天(tian)內(nei)用(yong)戶的(de)(de)歸(gui)一(yi)化用(yong)電量數(shu)據得出的(de)(de)折(zhe)線(xian)。
所述步驟s3提及的(de)(de)選取用(yong)(yong)(yong)戶(hu)的(de)(de)典型日(ri)(ri)用(yong)(yong)(yong)電(dian)量曲線,具(ju)體是指:選擇統(tong)計時間內(nei)的(de)(de)最大日(ri)(ri)累積(ji)用(yong)(yong)(yong)電(dian)量所對(dui)應的(de)(de)日(ri)(ri)負荷曲線作為該用(yong)(yong)(yong)戶(hu)的(de)(de)典型日(ri)(ri)用(yong)(yong)(yong)電(dian)量曲線,所選取的(de)(de)典型日(ri)(ri)應不包含特殊用(yong)(yong)(yong)電(dian)場景,另外當用(yong)(yong)(yong)戶(hu)在不同季(ji)度或月份的(de)(de)用(yong)(yong)(yong)電(dian)特性差(cha)異(yi)較大時,可以選取多個典型日(ri)(ri)負荷曲線與之對(dui)應。
所述步(bu)驟s3提及的特殊用(yong)電(dian)場景庫,具體包括:持續停電(dian)、短時(shi)停電(dian)、電(dian)壓暫(zan)降、用(yong)戶停產、部分設備停產等可能導致用(yong)電(dian)量發生驟變的場景,其(qi)中:
持(chi)續(xu)(xu)停(ting)(ting)電(dian)場(chang)景是指停(ting)(ting)電(dian)持(chi)續(xu)(xu)時間不(bu)少于3min的停(ting)(ting)電(dian)事件,屬于電(dian)網(wang)客觀場(chang)景;
短時(shi)(shi)停電場景是指停電持續時(shi)(shi)間在(zai)3min以內的停電事件,屬(shu)于電網客觀場景;
電(dian)(dian)壓暫(zan)降場景是指(zhi)用(yong)戶供電(dian)(dian)電(dian)(dian)壓跌(die)落至90%~10%額定電(dian)(dian)壓,并造成用(yong)戶敏感用(yong)電(dian)(dian)設備(bei)重(zhong)啟或停(ting)運的(de)情況(kuang),屬于電(dian)(dian)網客觀場景;
用(yong)戶停產(chan)場(chang)景是指(zhi)用(yong)戶在一段時(shi)間內主(zhu)動關停全部或(huo)主(zhu)要(yao)用(yong)電設備的(de)情況,屬于用(yong)戶主(zhu)觀(guan)場(chang)景;
部分設備(bei)停運是指用(yong)(yong)戶主(zhu)動停運某(mou)些用(yong)(yong)電設備(bei)的情(qing)況,屬于(yu)用(yong)(yong)戶主(zhu)觀場景。
所述步驟s4提及的場(chang)景檢測指(zhi)標(biao)體系,具(ju)體是指(zhi):用于反映(ying)發生用電量(liang)驟變的特(te)殊用電場(chang)景后(hou)用戶用電量(liang)變化(hua)特(te)征的指(zhi)標(biao)參數,具(ju)體包括(kuo):同(tong)比用電量(liang)跌幅δb、驟降起始時(shi)刻t1、殘余電量(liang)a0,指(zhi)標(biao)的定(ding)義如下(xia):
同(tong)(tong)比(bi)用電量跌幅δb:同(tong)(tong)一時(shi)段用電量與正常工作日的(de)典型日電量曲線相(xiang)比(bi),最(zui)大(da)的(de)跌落(luo)幅值定義為同(tong)(tong)比(bi)最(zui)大(da)電量跌幅δb;
驟(zou)降(jiang)起始(shi)時(shi)刻(ke)t1:同一(yi)時(shi)段用電量與正常工作日的典(dian)型日電量曲線相比,出現同比用電量跌(die)幅δb超過20%的時(shi)刻(ke)定義為驟(zou)降(jiang)起始(shi)時(shi)刻(ke)t1;
殘(can)余電(dian)量a0:驟降起始時刻(ke)對應的用(yong)電(dian)量定義為(wei)殘(can)余電(dian)量a0。
所述步驟(zou)s5提及的特殊用電場景庫的場景判斷(duan)標準(zhun),具(ju)體包括(kuo)基于(yu)單個(ge)用戶(hu)電表數(shu)據的場景判斷(duan)標準(zhun)和基于(yu)臺區多用戶(hu)的場景判斷(duan)標準(zhun),其中:
基(ji)于單(dan)個用戶電(dian)(dian)表數(shu)據的場(chang)景(jing)判(pan)斷標準是指(zhi):以單(dan)個用戶電(dian)(dian)表獲得(de)的電(dian)(dian)量數(shu)據和停(ting)電(dian)(dian)記錄為(wei)基(ji)礎,通過場(chang)景(jing)檢測(ce)指(zhi)標的差異來對所述特殊場(chang)景(jing)進(jin)行區分的判(pan)斷標準;
基于臺(tai)(tai)區(qu)多用戶的(de)(de)場景(jing)判斷(duan)標準(zhun)是指:以臺(tai)(tai)區(qu)所(suo)有用戶電(dian)表數(shu)據為基礎,通過判斷(duan)是否存在多個用戶在同一時刻發生用電(dian)量驟變來區(qu)分電(dian)網客觀(guan)(guan)場景(jing)和用戶主(zhu)觀(guan)(guan)場景(jing)的(de)(de)判斷(duan)標準(zhun)。
所述步驟s6具體包含以下內容:
s601,計(ji)算并判斷用戶的同比用電(dian)(dian)量跌幅δb是(shi)否大(da)于(yu)20%,若(ruo)δb大(da)于(yu)20%,則認為用戶發生(sheng)用電(dian)(dian)量意外(wai)驟降情況,記(ji)錄(lu)驟降起(qi)始時(shi)刻t1和(he)殘余用電(dian)(dian)量a0,并進入特(te)殊用電(dian)(dian)場景(jing)檢測判別過程;否則繼(ji)續計(ji)算下(xia)一時(shi)刻的同比用電(dian)(dian)量跌幅δb;
s602,判(pan)(pan)斷用(yong)戶電(dian)表在此時段(duan)(即驟(zou)降起始時刻t1之前(qian)的(de)3min)是(shi)否出現(xian)停(ting)(ting)電(dian)記(ji)(ji)錄,若(ruo)有(you)停(ting)(ting)電(dian)記(ji)(ji)錄,則判(pan)(pan)斷t1+1時刻的(de)同比用(yong)電(dian)量跌幅是(shi)否開始減小,如(ru)果開始減小,就(jiu)將此次用(yong)電(dian)量意外驟(zou)降原(yuan)因判(pan)(pan)斷為(wei)用(yong)戶經歷短時停(ting)(ting)電(dian),如(ru)果沒有(you)減小,就(jiu)判(pan)(pan)斷為(wei)用(yong)戶經歷持續停(ting)(ting)電(dian);若(ruo)沒有(you)停(ting)(ting)電(dian)記(ji)(ji)錄,則繼續下一步(bu)判(pan)(pan)斷;
s603,根(gen)據基于臺區多(duo)(duo)用(yong)(yong)戶(hu)(hu)的場景判斷標準,判斷臺區中是(shi)否存在(zai)(zai)多(duo)(duo)個其他用(yong)(yong)戶(hu)(hu)也在(zai)(zai)t1時刻(ke)(ke)發(fa)此(ci)類(lei)情(qing)況(kuang),即在(zai)(zai)t1時刻(ke)(ke)發(fa)生用(yong)(yong)電(dian)(dian)(dian)量驟(zou)降(jiang),而殘余電(dian)(dian)(dian)量不為(wei)0,電(dian)(dian)(dian)表沒有停(ting)電(dian)(dian)(dian)記錄,用(yong)(yong)電(dian)(dian)(dian)量在(zai)(zai)驟(zou)降(jiang)起始(shi)時刻(ke)(ke)的下一時刻(ke)(ke)開始(shi)恢復,若存在(zai)(zai)多(duo)(duo)個用(yong)(yong)戶(hu)(hu)同時在(zai)(zai)t1時刻(ke)(ke)發(fa)生此(ci)類(lei)情(qing)況(kuang),則將此(ci)次用(yong)(yong)電(dian)(dian)(dian)量意外驟(zou)降(jiang)原因判斷為(wei)用(yong)(yong)戶(hu)(hu)經歷電(dian)(dian)(dian)壓(ya)暫(zan)降(jiang);否則將此(ci)次用(yong)(yong)電(dian)(dian)(dian)量意外驟(zou)降(jiang)原因判斷為(wei)用(yong)(yong)戶(hu)(hu)備(bei)份設備(bei)停(ting)運(yun)。
本發明的有益效果:
(1)本發明所(suo)設(she)計的用(yong)戶(hu)電壓(ya)暫降事故(gu)檢測(ce)(ce)方(fang)法是(shi)利(li)用(yong)用(yong)戶(hu)側電表數據進行檢測(ce)(ce)篩選的,無需(xu)新增監測(ce)(ce)設(she)備,簡單方(fang)便,經濟(ji)性好,易于推廣(guang)。
(2)本發明設計的電(dian)壓(ya)暫降事(shi)故檢測方(fang)法是(shi)以(yi)用(yong)戶(hu)用(yong)電(dian)量(liang)發生驟降為起(qi)始(shi)判斷條件,可以(yi)過(guo)濾掉沒有對用(yong)戶(hu)正常用(yong)電(dian)產生明顯影響(xiang)的電(dian)壓(ya)暫降情況,更能切實反映(ying)用(yong)戶(hu)用(yong)電(dian)體驗,指導(dao)供電(dian)企業有針對性的開展(zhan)電(dian)壓(ya)暫降治(zhi)理工作。
(3)本(ben)發明(ming)所設計的(de)(de)場景區(qu)(qu)分(fen)判(pan)斷(duan)標準和(he)(he)判(pan)斷(duan)流程,同時考(kao)慮了(le)單個用戶的(de)(de)用電量(liang)變化特征和(he)(he)臺區(qu)(qu)多用戶的(de)(de)整體關聯,使判(pan)斷(duan)結(jie)果(guo)具有更高準確率(lv)和(he)(he)可信度。
附圖說明
圖1是本(ben)發明一種基于電表數據的用戶電壓(ya)暫(zan)降事(shi)故檢測方(fang)法(fa)的流程圖;
圖2是本發(fa)明(ming)步驟六的(de)具體判(pan)斷(duan)流(liu)程圖;
圖3是本發明實施(shi)例(li)的用戶標準化(hua)典型日用電量(liang)曲線。
具體實施方式
下面結(jie)合實施例及附圖,對本(ben)發明作(zuo)進一步(bu)地詳細(xi)說(shuo)明,但本(ben)發明的實施方式不限(xian)于(yu)此。
實施例
如圖1中s10-s60所(suo)示,基于(yu)電(dian)(dian)(dian)(dian)表(biao)數據(ju)(ju)(ju)的(de)(de)用(yong)(yong)(yong)戶(hu)電(dian)(dian)(dian)(dian)壓(ya)暫(zan)降(jiang)事(shi)故(gu)檢測方法(fa)流程圖,包(bao)括如下步驟:以3min為間隔,通過用(yong)(yong)(yong)戶(hu)側電(dian)(dian)(dian)(dian)能表(biao)采集并記(ji)錄配電(dian)(dian)(dian)(dian)網中每(mei)個用(yong)(yong)(yong)戶(hu)的(de)(de)電(dian)(dian)(dian)(dian)量(liang)(liang)數據(ju)(ju)(ju),計算用(yong)(yong)(yong)戶(hu)每(mei)個時段的(de)(de)用(yong)(yong)(yong)電(dian)(dian)(dian)(dian)量(liang)(liang);對用(yong)(yong)(yong)戶(hu)用(yong)(yong)(yong)電(dian)(dian)(dian)(dian)量(liang)(liang)數據(ju)(ju)(ju)進行歸一(yi)化(hua)處理,得出標(biao)準(zhun)化(hua)的(de)(de)用(yong)(yong)(yong)戶(hu)日(ri)(ri)用(yong)(yong)(yong)電(dian)(dian)(dian)(dian)量(liang)(liang)曲線;基于(yu)歷史(shi)數據(ju)(ju)(ju)選(xuan)取各用(yong)(yong)(yong)戶(hu)的(de)(de)典型日(ri)(ri)用(yong)(yong)(yong)電(dian)(dian)(dian)(dian)量(liang)(liang)曲線,并根據(ju)(ju)(ju)用(yong)(yong)(yong)戶(hu)行業特(te)(te)點制定(ding)特(te)(te)殊用(yong)(yong)(yong)電(dian)(dian)(dian)(dian)場(chang)(chang)景庫;基于(yu)與(yu)典型日(ri)(ri)用(yong)(yong)(yong)電(dian)(dian)(dian)(dian)量(liang)(liang)曲線的(de)(de)比對,考(kao)慮(lv)特(te)(te)殊用(yong)(yong)(yong)電(dian)(dian)(dian)(dian)場(chang)(chang)景的(de)(de)辨別需求建立場(chang)(chang)景檢測指(zhi)標(biao)體系;根據(ju)(ju)(ju)電(dian)(dian)(dian)(dian)表(biao)數據(ju)(ju)(ju)特(te)(te)征和檢測指(zhi)標(biao)的(de)(de)差異(yi),形(xing)成特(te)(te)殊用(yong)(yong)(yong)電(dian)(dian)(dian)(dian)場(chang)(chang)景庫的(de)(de)場(chang)(chang)景區(qu)分判斷標(biao)準(zhun);基于(yu)用(yong)(yong)(yong)戶(hu)電(dian)(dian)(dian)(dian)表(biao)數據(ju)(ju)(ju),通過場(chang)(chang)景判斷標(biao)準(zhun)檢測用(yong)(yong)(yong)戶(hu)發生用(yong)(yong)(yong)電(dian)(dian)(dian)(dian)量(liang)(liang)意外驟降(jiang)情況(kuang)是(shi)否(fou)由電(dian)(dian)(dian)(dian)壓(ya)暫(zan)降(jiang)引起(qi)。
參考(kao)圖2,所(suo)述(shu)步驟s6的(de)具體電壓(ya)暫(zan)降場景(jing)(jing)(jing)檢測判斷(duan)流程先(xian)后包括基(ji)于單(dan)個用戶電表數據的(de)場景(jing)(jing)(jing)判斷(duan)過程和基(ji)于臺區多用戶的(de)場景(jing)(jing)(jing)判斷(duan)過程。
1)計算并判斷用(yong)戶(hu)(hu)的同(tong)比(bi)用(yong)電量跌(die)幅(fu)δb是否(fou)大于20%,若δb大于20%,則認(ren)為(wei)用(yong)戶(hu)(hu)發生用(yong)電量意外驟降情況,記錄驟降起始時刻t1和殘余用(yong)電量a0,并進入特(te)殊(shu)用(yong)電場景(jing)檢(jian)測判別過程;否(fou)則繼續(xu)計算下(xia)一(yi)時刻的同(tong)比(bi)用(yong)電量跌(die)幅(fu)δb;
2)判(pan)斷用戶(hu)電(dian)(dian)(dian)表在此時(shi)段(duan)(即驟(zou)降起始時(shi)刻t1之前的(de)3min)是(shi)否出現(xian)停(ting)電(dian)(dian)(dian)記(ji)(ji)錄(lu),若(ruo)有停(ting)電(dian)(dian)(dian)記(ji)(ji)錄(lu),則判(pan)斷t1+1時(shi)刻的(de)同比用電(dian)(dian)(dian)量跌幅是(shi)否開(kai)始減小(xiao),如(ru)果開(kai)始減小(xiao),就(jiu)將此次(ci)用電(dian)(dian)(dian)量意外驟(zou)降原因判(pan)斷為用戶(hu)經歷(li)短(duan)時(shi)停(ting)電(dian)(dian)(dian),如(ru)果沒有減小(xiao),就(jiu)判(pan)斷為用戶(hu)經歷(li)持續(xu)(xu)停(ting)電(dian)(dian)(dian);若(ruo)沒有停(ting)電(dian)(dian)(dian)記(ji)(ji)錄(lu),則繼(ji)續(xu)(xu)下一步判(pan)斷;
3)上述基于(yu)(yu)單個(ge)用戶(hu)(hu)(hu)的(de)電(dian)表數據的(de)場(chang)(chang)景判(pan)斷(duan)過程仍無法區(qu)分(fen)電(dian)壓暫(zan)降(jiang)和(he)部分(fen)設備(bei)(bei)停(ting)運,需要根據基于(yu)(yu)臺(tai)(tai)區(qu)多(duo)用戶(hu)(hu)(hu)的(de)場(chang)(chang)景判(pan)斷(duan)標準進行進一步判(pan)斷(duan)。判(pan)斷(duan)臺(tai)(tai)區(qu)中是(shi)否存(cun)在(zai)(zai)(zai)多(duo)個(ge)其他用戶(hu)(hu)(hu)也在(zai)(zai)(zai)t1時(shi)(shi)刻發此類(lei)情況,即在(zai)(zai)(zai)t1時(shi)(shi)刻發生用電(dian)量驟(zou)(zou)降(jiang),而殘余電(dian)量不為0,電(dian)表沒(mei)有停(ting)電(dian)記錄,用電(dian)量在(zai)(zai)(zai)驟(zou)(zou)降(jiang)起(qi)始時(shi)(shi)刻的(de)下(xia)一時(shi)(shi)刻開始恢復,若存(cun)在(zai)(zai)(zai)多(duo)個(ge)用戶(hu)(hu)(hu)同時(shi)(shi)在(zai)(zai)(zai)t1時(shi)(shi)刻發生此類(lei)情況,則將(jiang)此次用電(dian)量意外驟(zou)(zou)降(jiang)原因判(pan)斷(duan)為用戶(hu)(hu)(hu)經歷電(dian)壓暫(zan)降(jiang);否則將(jiang)此次用電(dian)量意外驟(zou)(zou)降(jiang)原因判(pan)斷(duan)為用戶(hu)(hu)(hu)備(bei)(bei)份設備(bei)(bei)停(ting)運。
下(xia)面結(jie)合具體(ti)應用實(shi)例(li)闡述本發明提供(gong)的基于(yu)電表數據的用戶電壓暫(zan)降事故(gu)檢(jian)測方法。
在本實施例中對(dui)工業園臺區10個(ge)用(yong)戶(hu)(hu)進行(xing)用(yong)戶(hu)(hu)電(dian)壓(ya)暫降事故檢測,檢測時段為(wei)一個(ge)月。利用(yong)計(ji)(ji)量(liang)(liang)(liang)自(zi)動化系統(tong)以3min為(wei)間(jian)隔(ge)采集并記錄(lu)每個(ge)用(yong)戶(hu)(hu)的用(yong)戶(hu)(hu)側電(dian)能表(biao)電(dian)量(liang)(liang)(liang)讀(du)數(shu)qij,計(ji)(ji)算(suan)用(yong)戶(hu)(hu)每個(ge)時段的用(yong)電(dian)量(liang)(liang)(liang)qij。
對10個用(yong)(yong)戶每(mei)天(tian)每(mei)時段的(de)用(yong)(yong)電量(liang)進行歸一化(hua)處(chu)(chu)理,根據(ju)處(chu)(chu)理后的(de)數據(ju)畫出(chu)所有(you)用(yong)(yong)戶每(mei)天(tian)的(de)標準化(hua)日用(yong)(yong)電量(liang)曲線。
選擇(ze)本月內(nei)的最大日累積用電量所(suo)對應的標準化日負荷曲線(xian)(xian)作為典型(xing)日用電量曲線(xian)(xian),由此獲(huo)得10個(ge)用戶的典型(xing)日用電量曲線(xian)(xian),圖3為臺區1號用戶的標準化典型(xing)日用電量曲線(xian)(xian)。
本實施(shi)例中,根(gen)據這(zhe)些工業用(yong)(yong)戶的行業用(yong)(yong)電(dian)習慣制定特殊用(yong)(yong)電(dian)場景庫,包括:持續(xu)停(ting)電(dian)、短時停(ting)電(dian)、電(dian)壓暫降、用(yong)(yong)戶停(ting)產、部分設備停(ting)產。在(zai)其他實例應用(yong)(yong)中,可根(gen)據用(yong)(yong)戶實際用(yong)(yong)電(dian)習慣對特殊用(yong)(yong)電(dian)場景進行增減(jian)。
基于(yu)與典(dian)型日(ri)用(yong)電(dian)(dian)量曲線(xian)的比對(dui),考慮特殊用(yong)電(dian)(dian)場(chang)景(jing)的辨別需求(qiu)建立場(chang)景(jing)檢(jian)測(ce)指標(biao)體系(xi),具體包括:同(tong)比用(yong)電(dian)(dian)量跌幅δb、驟降起始時(shi)刻t1、殘(can)余電(dian)(dian)量a0。
根據電(dian)表數據特征和檢測指(zhi)標(biao)的差異,形(xing)成特殊用電(dian)場(chang)景(jing)庫的場(chang)景(jing)區(qu)分判斷標(biao)準(zhun),包(bao)括(kuo)基于(yu)單個(ge)用戶電(dian)表數據的場(chang)景(jing)判斷標(biao)準(zhun)和基于(yu)臺區(qu)多用戶的場(chang)景(jing)判斷標(biao)準(zhun),在本實施例中場(chang)景(jing)判斷標(biao)準(zhun)具體(ti)為:
基于單個用戶電表(biao)數據的場景(jing)判斷標準:
持(chi)續(xu)停電場景(jing)判斷(duan)標準為:殘(can)余電量(liang)為0,電表(biao)出現停電記錄,用電量(liang)在(zai)驟降起(qi)始(shi)時(shi)刻的(de)下一時(shi)刻并未出現恢復;
短時停(ting)電場景判(pan)斷(duan)標準為:殘(can)余電量(liang)不為0,電表出現(xian)停(ting)電記錄,用電量(liang)在驟降起始(shi)時刻的下一時刻開始(shi)恢(hui)復(fu);
電壓暫(zan)降場景判(pan)斷(duan)標準為:殘余(yu)電量(liang)不為0,電表沒有停電記錄,用電量(liang)在(zai)驟降起始時(shi)刻的(de)下(xia)一時(shi)刻開始恢復;
用(yong)戶停(ting)產場景判斷(duan)標準(zhun)為:自驟(zou)降(jiang)起(qi)始時刻后,用(yong)電(dian)量為0或者持(chi)續穩定維(wei)持(chi)在一個較低水平,電(dian)表沒有停(ting)電(dian)記錄;
部分設備停運判斷標準為(wei)(wei):殘(can)余電(dian)量(liang)不(bu)為(wei)(wei)0,電(dian)表(biao)沒有停電(dian)記錄,用電(dian)量(liang)在驟降(jiang)起始時(shi)刻的下一(yi)時(shi)刻開始恢復;
基于(yu)臺區多(duo)用戶的場景判斷標準為(wei):當(dang)臺區存在(zai)多(duo)個用戶在(zai)同一(yi)時刻發生(sheng)用電量驟變,則認為(wei)屬(shu)(shu)于(yu)電網客觀(guan)場景,即(ji)持續停電、短時停電或電壓暫降,否(fou)則認為(wei)屬(shu)(shu)于(yu)用戶主觀(guan)場景,即(ji)用戶停產或部分設備(bei)停運。
根據步驟s6對10個(ge)用(yong)(yong)戶(hu)進行電(dian)壓(ya)(ya)(ya)暫降事故(gu)檢(jian)測判斷(duan),發(fa)(fa)現臺區1至(zhi)5號用(yong)(yong)戶(hu)在本(ben)月(yue)13日(ri)第(di)180個(ge)監測時間(jian)節點同(tong)時出(chu)現同(tong)比用(yong)(yong)電(dian)量跌(die)幅δb大于20%的(de)情況,殘余用(yong)(yong)電(dian)量沒有(you)跌(die)至(zhi)0,且(qie)(qie)臺區及用(yong)(yong)戶(hu)智(zhi)能電(dian)表均未(wei)發(fa)(fa)現供電(dian)電(dian)壓(ya)(ya)(ya)過(guo)零(ling)點,沒有(you)停電(dian)記錄,從第(di)181個(ge)監測時間(jian)節點開(kai)始(shi)用(yong)(yong)戶(hu)用(yong)(yong)電(dian)量開(kai)始(shi)回升,隨(sui)后恢復至(zhi)接近典型日(ri)用(yong)(yong)電(dian)量曲線水平(ping)。因此依據步驟s6的(de)場景(jing)判斷(duan)邏(luo)輯可檢(jian)測出(chu)本(ben)月(yue)13日(ri)8:57至(zhi)9:00期(qi)間(jian)臺區1至(zhi)5號用(yong)(yong)戶(hu)經歷了(le)一次電(dian)壓(ya)(ya)(ya)暫降事故(gu),并(bing)且(qie)(qie)此次電(dian)壓(ya)(ya)(ya)暫降事故(gu)對這5個(ge)用(yong)(yong)戶(hu)的(de)正常用(yong)(yong)電(dian)產生(sheng)了(le)明顯影響(xiang)。
本實施(shi)例(li)進一步表明(ming)(ming)了:本發明(ming)(ming)所述(shu)的基于電表數(shu)據的用(yong)戶(hu)電壓(ya)暫(zan)降(jiang)事故檢測(ce)方法能(neng)夠在現有設(she)備(bei)水平上,利用(yong)用(yong)戶(hu)側電表的電量(liang)數(shu)據和停電記(ji)錄檢測(ce)篩(shai)選對用(yong)戶(hu)正常用(yong)電產生(sheng)明(ming)(ming)顯影響的電壓(ya)暫(zan)降(jiang)事故,簡單易行,能(neng)夠幫(bang)助供電企(qi)業對大量(liang)為裝設(she)電能(neng)質量(liang)監測(ce)設(she)備(bei)的用(yong)戶(hu)進行電壓(ya)暫(zan)降(jiang)事故檢測(ce),指(zhi)導開展電能(neng)質量(liang)提(ti)升工作(zuo)。
上述實(shi)(shi)施(shi)例為本(ben)發(fa)明(ming)較佳的(de)(de)實(shi)(shi)施(shi)方式,但本(ben)發(fa)明(ming)的(de)(de)實(shi)(shi)施(shi)方式并不(bu)受所述實(shi)(shi)施(shi)例的(de)(de)限制(zhi),其他的(de)(de)任何未背離(li)本(ben)發(fa)明(ming)的(de)(de)精神實(shi)(shi)質與(yu)原(yuan)理(li)下所作的(de)(de)改(gai)變(bian)、修(xiu)飾、替代、組合、簡化,均應(ying)為等效的(de)(de)置(zhi)換(huan)方式,都包含在本(ben)發(fa)明(ming)的(de)(de)保(bao)護范圍之內。