【摘要】：針對交流輸電線路閃絡(luò)桿塔準(zhǔn)確定位困難的問題,仿真計算了線路絕緣子串閃絡(luò)后短路電流沿避雷線和桿塔的分布,給出了1種實用的閃絡(luò)塔準(zhǔn)確監(jiān)測系統(tǒng)。按實際線路參數(shù)在ATP-EMTP軟件中建立的仿真模型計算結(jié)果表明:在每基桿塔接地電阻相同的情況下,95%的工頻短路電流沿避雷線分流至其他桿塔;短路電流的分布受桿塔接地電阻的影響,桿塔入地電流的大小不能判斷桿塔是否閃絡(luò)。進(jìn)一步提出了用桿塔避雷線兩邊工頻短路電流流向的異同來判斷該塔是否閃絡(luò):若短路電流流向相反則桿塔閃絡(luò),短路電流流向相同則未閃絡(luò)�；诖朔椒ㄔO(shè)計制作了交流輸電線路閃絡(luò)桿塔定位系統(tǒng):在塔頂?shù)鼐�兩邊各安裝1個工頻電流傳感器,傳感器與閃絡(luò)監(jiān)測子機(jī)相連,子機(jī)根據(jù)傳感器信號判斷桿塔是否閃絡(luò),閃絡(luò)信息經(jīng)子機(jī)接力傳遞至主機(jī),主機(jī)將其以短信形式發(fā)回服務(wù)器。該系統(tǒng)經(jīng)模擬故障試驗驗證可以準(zhǔn)確定位閃絡(luò)桿塔,并及時發(fā)送閃絡(luò)桿塔號。
[Abstract]:Aiming at the difficulty of accurately locating the flashover tower of AC transmission line, the distribution of short circuit current after flashover of line insulator string along the lightning arrester and tower is simulated and calculated, and a practical accurate monitoring system for flashover tower is presented. The simulation model established in ATP-EMTP software according to the actual line parameters shows that 95% of the power frequency short-circuit current flows along the lightning protection line to other towers under the same grounding resistance of each base tower; The distribution of the short circuit current is affected by the grounding resistance of the tower, and the magnitude of the tower earth current can not determine whether the tower is flashover or not. Furthermore, the similarities and differences of the power frequency short circuit current flow on both sides of the tower lightning protection line are proposed to determine whether the tower is flashover: if the short circuit current flows in opposite direction, the pole tower flashover, and the short circuit current flow in the same direction is not flashover. Based on this method, an AC transmission line flashover tower positioning system is designed and manufactured: one power frequency current sensor is installed on each side of the tower top ground line, the sensor is connected with the flashover monitoring submachine, and the submachine judges whether the pole tower is flashover or not according to the sensor signal. The flashover information is transmitted to the host through the submachine relay, and the host sends it back to the server in the form of short message. The system can accurately locate the flashover tower and send the flashover tower number in time.
【作者單位】： 武漢大學(xué)電氣工程學(xué)院;福建省電力有限公司檢修分公司;
【基金】：中國-蘇格蘭博士生教育及科研基金([2010]6044)~~
【分類號】：TM721.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王東舉;周浩;;高壓輸電線路故障定位綜述[J];電氣應(yīng)用;2007年04期

2 周洪偉;羅建;吳英杰;王韞;;低電壓太陽能供電系統(tǒng)設(shè)計[J];電子測量技術(shù);2011年02期

3 孫旭 ,陸家榆 ,徐達(dá)明 ,林志明 ,羅兵 ,張澤華;短路電流分流系數(shù)模擬測試[J];高電壓技術(shù);2001年S1期

4 杜林;陳宏業(yè);陳偉根;龐軍;李化;;采用雙端電壓行波法的輸電線路故障定位系統(tǒng)設(shè)計[J];高電壓技術(shù);2011年02期

5 束洪春;曹璞t，

本文編號：2205204