限制電網(wǎng)短路電流的措施及新型短路限流器的研究
發(fā)布時間：2018-08-30 17:31
【摘要】：隨著我國電網(wǎng)負荷的不斷增加,電網(wǎng)建設也在迅速發(fā)展。但是由于經濟發(fā)展程度的不同,我國供電負荷的區(qū)域性也極為明顯。東部沿海地區(qū)的用電量尤其巨大,以浙江省的電網(wǎng)為例,負荷相對來說較為集中,電網(wǎng)的結構比較緊密,這些原因導致這一地區(qū)的短路電流水平也在不斷而且迅速地增大,影響了電力系統(tǒng)的安全穩(wěn)定運仃和國民生產的正常運作。 與此同時,在各種不同種類的短路故障當中,位于變壓器近區(qū)的短路故障是危害最為嚴重的。不僅對變壓器的絕緣造成極大地損傷,最后導致的停電范圍更大,影響更為惡劣。因此,限制短路電流首先必須應該限制發(fā)生于變壓器近區(qū)故障的短路電流。 本文總結和分析了幾種限制短路電流的方法,特別針對近區(qū)短路,結合本人在工作中的實際情況,重點介紹了現(xiàn)場設備中應用較多的短路電流限制開斷器,從原理和使用效果上對這種限流措施進行展開,肯定其達到限制近區(qū)短路電流的目的,確保了發(fā)生故障以后設備的安全。
[Abstract]:With the continuous increase of power grid load, power grid construction is also developing rapidly. However, due to the difference of economic development, the region of power supply load in China is also very obvious. The power consumption in the eastern coastal areas is especially huge. Taking Zhejiang power grid as an example, the load is relatively concentrated and the structure of the power grid is relatively close. These reasons cause the level of short-circuit current in this area to increase continuously and rapidly. It affects the security and stability of power system and the normal operation of national production. At the same time, among all kinds of short-circuit faults, the short-circuit fault located near the transformer is the most serious. Not only the insulation of transformers is damaged greatly, but also the range of power outages is larger and the influence is worse. Therefore, to limit the short circuit current, the short circuit current occurring in the near region fault of transformer must be limited first. In this paper, several methods of limiting short circuit current are summarized and analyzed. Especially for near area short circuit, combined with the actual situation of my work, the emphasis is put on the application of short circuit current limiting breaker in field equipment. From the aspects of principle and application effect, the current limiting measures are carried out, and the purpose of limiting the short-circuit current in the near region is confirmed, which ensures the safety of the equipment after the failure.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM471
本文編號：2213769
[Abstract]:With the continuous increase of power grid load, power grid construction is also developing rapidly. However, due to the difference of economic development, the region of power supply load in China is also very obvious. The power consumption in the eastern coastal areas is especially huge. Taking Zhejiang power grid as an example, the load is relatively concentrated and the structure of the power grid is relatively close. These reasons cause the level of short-circuit current in this area to increase continuously and rapidly. It affects the security and stability of power system and the normal operation of national production. At the same time, among all kinds of short-circuit faults, the short-circuit fault located near the transformer is the most serious. Not only the insulation of transformers is damaged greatly, but also the range of power outages is larger and the influence is worse. Therefore, to limit the short circuit current, the short circuit current occurring in the near region fault of transformer must be limited first. In this paper, several methods of limiting short circuit current are summarized and analyzed. Especially for near area short circuit, combined with the actual situation of my work, the emphasis is put on the application of short circuit current limiting breaker in field equipment. From the aspects of principle and application effect, the current limiting measures are carried out, and the purpose of limiting the short-circuit current in the near region is confirmed, which ensures the safety of the equipment after the failure.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM471
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，本文編號：2213769
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