發(fā)布時(shí)間：2018-01-29 04:54

  本文關(guān)鍵詞： 中性點(diǎn) 消弧線圈 接地 配電網(wǎng) MATLAB　出處：《吉林大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：中性點(diǎn)接地方式是電網(wǎng)系統(tǒng)中的一項(xiàng)重要技術(shù)，并隨著我國電網(wǎng)事業(yè)的不斷發(fā)展應(yīng)用愈加廣泛�，F(xiàn)今我國城市配電網(wǎng)的發(fā)展速度日益加快，在城市配電網(wǎng)中電纜的廣泛應(yīng)用，使得城市電網(wǎng)系統(tǒng)的接地電容量不斷增加，使得單相瞬間接地故障電流增多，致使接地電流不能自行熄滅，導(dǎo)致單相瞬間接地故障不能被解除，如何解決這個(gè)問題。現(xiàn)今大多是利用中性點(diǎn)經(jīng)消弧線圈接地系統(tǒng)來解決。 采用中性點(diǎn)經(jīng)消弧線圈接地系統(tǒng)可以降低通過故障點(diǎn)的電容電流，實(shí)現(xiàn)降低電壓，便于電弧的熄滅，從而提高電網(wǎng)系統(tǒng)供電的可靠性，并具有良好的電磁兼容效果�？墒沁@種消除電弧方式現(xiàn)今還存在一些不足，，例如故障選線保護(hù)的配置難度大等，值得進(jìn)一步研究與完善。 本文首先闡述中性點(diǎn)接地方式在國內(nèi)外的發(fā)展情況，并指出中線點(diǎn)接地方式中存在的問題及其發(fā)展趨勢，并進(jìn)一步對(duì)中性點(diǎn)經(jīng)消弧線圈接地系統(tǒng)的原理進(jìn)行分析與比較，深入研究三種重要接地方式的優(yōu)缺點(diǎn)，同時(shí)對(duì)用戶供電可靠性、通信系統(tǒng)、人身安全、電氣設(shè)備絕緣水平的各方面影響簡單分析。 其次，用MATLAB中的電力仿真工具對(duì)簡單的配電網(wǎng)絡(luò)進(jìn)行單相接地故障仿真，并分析研究三種主要的接地方式。 最后，綜述中性點(diǎn)經(jīng)消弧線圈接地系統(tǒng)的優(yōu)點(diǎn)，并對(duì)中性點(diǎn)經(jīng)消弧線圈接地方式進(jìn)行相關(guān)問題的探討。
[Abstract]:Neutral grounding mode is an important technology in the grid system, and with the application of electric power industry in our country develops more and more widely. The development speed of our country's city distribution network is accelerating, widely used in cable distribution network in the city, the city power system grounding capacity increasing, the single moment ground fault current increases, resulting in the grounding current cannot extinguish, resulting in single-phase transient grounding fault cannot be released, how to solve this problem. The most is the use of neutral grounding via arc suppression coil system to solve.
The neutral grounding via arc suppression coil system can reduce the capacitance current of fault point, lower voltage, easy to extinguish the arc, so as to improve the reliability of power supply system, and has a good electromagnetic compatibility effect. But this way the eliminate arc also has some shortcomings, such as fault line protection configuration is difficult so, worthy of further research and improvement.
This paper expounds the development situation of neutral grounding mode at home and abroad, and points out the existing line grounding in the problems and development trend, and further to the neutral principle of arc suppression coil grounding system were analyzed and compared, in-depth study of the advantages and disadvantages of three kinds of important grounding type, at the same time to the user the reliability of power supply, communication system, personal safety, the insulation level of electrical equipment of simple analysis.
Secondly, the power simulation tools in MATLAB are used to simulate the single phase grounding fault of a simple distribution network, and three main grounding methods are analyzed and studied.
At last, the advantages of neutral point through arc suppression coil grounding system are summarized, and the related problems of neutral point through arc suppression coil grounding mode are discussed.

【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM862

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本文編號(hào)：1472579