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      省級電網最高負荷破億背后的故事

      發布日期: 2018-10-25 信息來源: 電網新聞網

       |                                                                                                                 

       >  省級電網最高負荷破億背后的故事

      時間:2017-08-04 來源:亮報 作者:劉早 周瑾 黃蕾

          

          

          500千伏江都~晉陵雙線增容改造工程投產,使得該線路輸電能力由240萬千瓦提升至400萬千瓦,

        進一步提升了江蘇電網北電南送能力。  萬程鵬 攝 

          

          

          負荷(萬千瓦)  制圖/王梓

        連日來,多地出現高溫天氣,使得電網負荷持續攀升,多地電網最大負荷創下歷史新高。尤其是江蘇,11次刷新歷史記錄,日最高負荷沖破1億千瓦,成為國家電網系統首個負荷破億的省級電網。在高溫、高負荷,范圍大、持續時間長的嚴峻形勢下,江蘇電網運行安全穩定,供用電秩序井然,居民企業的生產生活用電并未受到影響。這背后的原因是什么?

        負荷猛增,大電網余缺互濟作用凸顯

        高溫是夏季永恒的主題。每年夏天,人們都要在熾熱的陽光下接受高溫的“烤驗”,電網也是如此。

        在浙江,電網負荷今年已經連創6次新高,直接沖向7485萬千瓦;在山東,全省17個地市中,已有14個地市用電負荷刷新歷史記錄;江蘇更是11次刷新歷史記錄,負荷沖破1億千瓦……

        今年7月以來,全國各地陸續進入“烘烤模式”,中央氣象臺連續20天發布高溫預警,40攝氏度以上的高溫屢見不鮮。在這樣的背景下,當越來越多的人對空調產生依賴,當工廠并沒有因為酷暑而減緩生產進度,社會對電力的需求便會不斷增加,用電負荷創新高也成為了各地電網的“規定動作”。

        7月24日上午10點14分,伴隨著南京40攝氏度的高溫以及無數空調外機的瘋狂運轉,江蘇電網最高調度用電負荷今年第9次刷新歷史記錄,沖破1億千瓦,達到10002.4萬千瓦。這也使江蘇電網成為國家電網首個負荷破1億千瓦的省級電網。隨后的12點45分,江蘇電網調度用電負荷更是達到了10177萬千瓦,超過廣東電網,成為全國用電負荷最大省份。據了解,江蘇電網在這一天的最高調度用電負荷達到了10218.6萬千瓦。

        1億千瓦的用電負荷意味著什么?經計算,這樣規模的用電負荷相當于4.5個三峽水電站滿負荷運行,可以支撐1.3億臺1匹空調同時運行。“這意味著江蘇電網的用電規模已經超過了英、法等國的用電負荷,與德國相當。”國網江蘇省電力公司發展策劃部主任王旭介紹。

        記者統計發現,江蘇電網10218.6萬千瓦的用電負荷,比去年夏季9278萬千瓦的負荷最高值增加了將近1000萬千瓦,這樣的負荷增量甚至相當于我國不少省會城市的用電負荷總量。

        但即便如此,江蘇全省居民、企業的生產生活用電并未受到影響,電網運行安全穩定。對此,國網江蘇電力調度控制中心系統處處長周挺深知其中的緣由。

        “負荷過億,我們并不意外。”周挺告訴記者,為保障電網迎峰度夏,國網江蘇電力充分利用大數據技術,早已精確預測了今夏江蘇電網的用電負荷,并確保一批迎峰度夏工程按期投運,為成功應對高溫高負荷奠定了堅實的電網基礎。

        短時間內負荷猛增,電網要安然無恙,就需要大電網的有力支撐。在前不久舉行的國家電網公司2017年年中工作會議上,國家電網公司董事長、黨組書記舒印彪表示,今夏華東、華北等地用電負荷連創新高,國家電網依然保持安全穩定運行,充分體現出大電網強大的資源配置能力和余缺互濟能力,以及大電網的經濟效益和社會效益。

        受益于此,江蘇電網在用電負荷破億之時,便利用大電網,積極爭取區外來電,有力補充了全省的電力供應。

        “截至6月底,江蘇已經形成了‘一交兩直’的特高壓格局。”周挺介紹道,借助特高壓及500千伏區域間聯絡通道,江蘇電網在今夏用電負荷高峰時段,全省最大受電已經達到2332萬千瓦,占最大用電負荷的22.82%。

      推薦 英大傳媒集團數字媒體中心制作維護
      地址:北京市東城區北京站西街19號英大傳媒大廈 郵政編碼:100005



      廣播電視節目制作經營許可證(廣媒)字第173號
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