劉健配電網(wǎng)故障處理關(guān)鍵技術(shù)(編輯修改稿)
2025-06-17 08:16 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 19 B 20 B 21 B 22 B 23 B 24 Ring main unit Ring main unit 優(yōu)點(diǎn) ? 經(jīng)濟(jì) ? 分支線或用戶故障不影響主干線 . ? 級(jí)差整定方便 ? 瞬時(shí)故障時(shí)只須 ? 瞬時(shí)故障與永久故障判別簡(jiǎn)單 ? 配電自動(dòng)化邏輯簡(jiǎn)單 模式化故障處理 典型模式化接線 ? “手拉手”環(huán)狀網(wǎng) ? 多分段多連接 ? 多供一備電纜網(wǎng) ? 4?6 接線 ? …… 一條饋線需要留有能帶動(dòng)對(duì)側(cè)全部負(fù)荷的備用容量，因此正常情況下配電 資源的利用率小于 50%. “手拉手”環(huán)狀網(wǎng) 50% Each feeder is divided into two parts. The two parts of a feeder are linked to two different feeders, respectively. Each feeder only has to consider one half of the backup loading of the other feeder besides its own loading. Thus, the efficiency can be improved to 67% in the normal situation. 2分段 2連接 67% Each feeder is divided into three parts. The three parts of a feeder are linked to three different feeders, respectively. Each feeder only has to consider one third of the backup loading of the other feeder besides its own loading. Thus, the efficiency can be improved to 75% in the normal situation. 3分段 3連接 75% A7 A5 A6 A3 A4 A1 A2 B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 B11 A8 B12 S1 S2 A10 A9 A12 A11 A14 A13 A16 A15 B13 B14 B15 B16 B17 B18 B19 B20 B21 B22 B23 B24 S3 A1 8 A17 A20 A1 9 A21 A23 B27 B26 B2 5 B30 B29 B2 8 B33 B32 B3 1 B36 B35 B3 4 S4 A24 A22 A25 3供 1備電纜網(wǎng) Three cables in service are linked to one cable. Each cable may reach its loading limitation in the normal situation. Thus, the averaged efficiency may be 75% . 75% 注意 ? 模式化接線可以提高配電設(shè)備的利用率 . ? 但是： 必須采取模式化故障處理才能達(dá)到上述目的??！ 模式化故障處理步驟 ? 對(duì)于多分段多聯(lián)絡(luò)模式化接線，永久故障發(fā)生后，F(xiàn)A將故障所在饋線分為多段，每段分別由不同的電源恢復(fù)。 ? 對(duì)于多供一備模式，故障后健全區(qū)域的恢復(fù)一律由備用電纜實(shí)現(xiàn)。 ? 即使負(fù)荷很輕、一個(gè)電源就可以完成全部健全區(qū)域恢復(fù)的情形，也嚴(yán)格執(zhí)行上述步驟。 ? 因一成不變，配電自動(dòng)化系統(tǒng)的故障處理邏輯將容易實(shí)現(xiàn) Example 1 A fault occurs on the first section of a feeder. The main CB trips, recloses and trips, again. Thus, the fault is identified as a permanent fault. Example 1 The two healthy section are separated and restored by its corresponding feeders, respectively, even when the loading is so
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