限制电网短路电流的措施及新型短路限流器的研究
发布时间：2018-08-30 17:31
【摘要】：随着我国电网负荷的不断增加,电网建设也在迅速发展。但是由于经济发展程度的不同,我国供电负荷的区域性也极为明显。东部沿海地区的用电量尤其巨大,以浙江省的电网为例,负荷相对来说较为集中,电网的结构比较紧密,这些原因导致这一地区的短路电流水平也在不断而且迅速地增大,影响了电力系统的安全稳定运仃和国民生产的正常运作。 与此同时,在各种不同种类的短路故障当中,位于变压器近区的短路故障是危害最为严重的。不仅对变压器的绝缘造成极大地损伤,最后导致的停电范围更大,影响更为恶劣。因此,限制短路电流首先必须应该限制发生于变压器近区故障的短路电流。 本文总结和分析了几种限制短路电流的方法,特别针对近区短路,结合本人在工作中的实际情况,重点介绍了现场设备中应用较多的短路电流限制开断器,从原理和使用效果上对这种限流措施进行展开,肯定其达到限制近区短路电流的目的,确保了发生故障以后设备的安全。
[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.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM471
本文编号：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.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM471
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