本文選題：配電網(wǎng) + 接地故障��； 參考：《華南理工大學》2014年碩士論文

【摘要】：電力系統(tǒng)的中性點接地方式通常是按電壓等級的高低來進行選取的，當前我們國家電網(wǎng)通常采用的接地方式有：不接地、直接接地、經(jīng)電阻接地和經(jīng)消弧線圈接地。110kV及以上電網(wǎng)都采用中性點直接接地方式，而6～66kV配電網(wǎng)均采用中性點不直接接地方式，本文針對廣東電網(wǎng)公司使用最多的10kV配電網(wǎng)來進行討論。 10kV配電網(wǎng)中性點接地方式的選擇是一個涉及到多方面技術理論的綜合性問題，不僅包含電力技術，還包含了經(jīng)濟問題。電力系統(tǒng)在正常運行時，，對不同的中性點接地方式及其差異，系統(tǒng)基本不受影響�？墒牵斚到y(tǒng)發(fā)生接地故障時，其特性受接地方式的影響很大。當前東莞地區(qū)變電站的10kV配電網(wǎng)接地方式主要有經(jīng)消弧線圈和經(jīng)小電阻接地兩種。過去我們比較偏向于采用經(jīng)消弧線圈接地的方式，但近年來由于電網(wǎng)發(fā)展和設備更新等原因，經(jīng)消弧線圈接地方式的弊端日漸顯露出來，我們在配電網(wǎng)接地方式的選擇上面，又逐漸偏向于經(jīng)小電阻接地的方式，盡管經(jīng)小電阻接地的方式也是有其弊端。當前我們必須面對的情況是，在東莞市的配電網(wǎng)中，經(jīng)消弧線圈接地和經(jīng)小電阻接地這兩種方式在未來很長的一段時間還是共存的。本文的主要工作是： 1、通過分析經(jīng)消弧線圈接地系統(tǒng)和經(jīng)小電阻接地系統(tǒng)的原理，對比兩種接地系統(tǒng)在發(fā)生接地故障時的變化量特征，歸納兩種不同接地方式的優(yōu)缺點； 2、以東莞配電網(wǎng)為藍本，根據(jù)配電網(wǎng)的網(wǎng)絡架構、材料選用、保護整定、設備維護等方面因素，并結合一些事故案例，來分析經(jīng)消弧線圈接地系統(tǒng)和經(jīng)小電阻接地系統(tǒng)在實際運行過程中存在的問題； 3、通過邏輯推理以及現(xiàn)實狀況，總結和歸納解決當前經(jīng)消弧線圈接地系統(tǒng)和經(jīng)小電阻接地系統(tǒng)存在問題的一些措施； 4、根據(jù)當前配電網(wǎng)的發(fā)展趨勢，提出關于未來配電網(wǎng)中性點選擇以及保護配置方面的一些看法。
[Abstract]:The neutral grounding mode of power system is usually selected according to the voltage level. At present, the normal grounding methods used in our national power grid are: no grounding, direct grounding, Direct neutral grounding is adopted in both resistance grounding and arc-suppression coil grounding and direct neutral grounding is adopted in 6~66kV distribution network. This paper discusses the 10kV distribution network which is widely used by Guangdong Power Grid Company. The selection of neutral grounding mode in 10kV distribution network is a comprehensive problem involving various technical theories, including not only power technology, but also economic problems. When the power system is in normal operation, the system will not be affected by different neutral grounding modes and their differences. However, when the grounding fault occurs, the characteristics of the system are greatly affected by the grounding mode. At present, there are two kinds of grounding modes of 10kV distribution network in Dongguan substation, which are arc suppression coil and small resistance grounding. In the past, we preferred to use the method of grounding through arc-suppression coil, but in recent years, due to the development of power network and the renewal of equipment, the malpractice of grounding through arc-suppression coil has been revealed day by day, so we are choosing the grounding mode of distribution network. And gradually favor the way of grounding through small resistance, although the way of grounding through small resistance has its drawbacks. At present, we must face the situation that in the distribution network of Dongguan City, the two ways of grounding through arc-suppression coil and through small resistance will coexist for a long time in the future. The main work of this paper is: 1. By analyzing the principle of arc-suppression coil grounding system and small resistance grounding system, the variation characteristics of two kinds of grounding systems are compared, and the advantages and disadvantages of two different grounding modes are summarized. 2. Take the Dongguan distribution network as the blueprint, according to the network structure of the distribution network, material selection, protection setting, equipment maintenance and so on, and combine with some accident cases, To analyze the problems existing in the actual operation of the grounding system through the arc-suppression coil and the grounding system through the small resistance; 3. Through logical reasoning and reality, the paper summarizes and summarizes some measures to solve the problems existing in the current grounding system via arc-suppression coil and through the grounding system with small resistance. 4. According to the development trend of distribution network at present, some views on the selection of neutral point and protection configuration of distribution network in the future are put forward.
【學位授予單位】：華南理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM862

【參考文獻】

相關期刊論文 前10條

1 許慶強;許揚;周棟驥;奚雪峰;;小電阻接地配電網(wǎng)線路保護單相高阻接地分析[J];電力系統(tǒng)自動化;2010年09期

2 張山,楊玉昆,潘華東,陸國慶;KD-XH型智能化快速消弧系統(tǒng)應用效果分析[J];高電壓技術;2001年04期

3 何構;;自動調諧消弧線圈投入引起諧振過電壓的原因[J];高電壓技術;2007年09期

4 陳維賢;陳禾;;配電網(wǎng)中電壓互感器消諧、單相消弧和單相永久性故障切線問題的解決方案[J];高電壓技術;2012年04期

5 盛方正;陳子聰;陳曉炯;;中性點不接地系統(tǒng)單相斷線故障分析及對策研究[J];供用電;2011年03期

6 林春清;李春平;郭兆成;王嚴軍;宋昆仲;;負荷線路斷線引起消弧線圈接地系統(tǒng)過電壓的分析與判別[J];電網(wǎng)技術;2012年09期

7 張慧芬,潘貞存,桑在中;小電流接地系統(tǒng)單相斷線加接地故障的分析[J];繼電器;2004年18期

8 趙冉;譚偉璞;楊以涵;;配電網(wǎng)中性點接地方式分析[J];繼電器;2007年04期

9 李穎峰;;配電網(wǎng)中性點接地方式探討[J];電力系統(tǒng)保護與控制;2008年19期

10 湯曉偉;李強;;10kV自動調諧消弧線圈接地系統(tǒng)諧振事故探析[J];華東電力;2011年10期

本文編號：1808738