35kV變電站繼電保護(hù)系統(tǒng)的設(shè)計(jì)與應(yīng)用
[Abstract]:Nowadays, with the continuous development of power system and the safe and stable operation of power grid, electric energy has brought huge power and benefit to the national economy and social development. However, in the operation of electric power system, the electrical equipment will often be damaged, broken and overloaded due to natural or human factors, which makes the power network enter into abnormal operation state. If it can not be controlled in time and effectively, it will cause the power system oscillation, power supply stability imbalance, even make the power network collapse, and lead to a large area of power outages, resulting in serious consequences. In order to prevent accidents, modern intelligent substations are equipped with relay protection devices. The relay protection of power system is the technology and equipment to automatically remove the fault equipment and eliminate the abnormal situation. It is of great significance to the maintenance of power system. This paper takes the real accident case as the starting point, unifies the original data, carries on the detailed research and the contrast to the equipment wiring way (the internal bridge and the single bus segment connection), determines the suitable primary connection scheme (35kV side internal bridge), 10kV); The circuit is analyzed, and the short-circuit current, equipment and circuit protection setting are calculated by using two operation modes (maximum operation mode and minimum operation mode), and the setting calculation and verification are carried out. This paper studies and analyzes the causes of real accidents, further improves the understanding of power system relay protection, obtains the configuration and fixed value of power system relay protection, and puts forward its own views on improving the sensitivity of power system relay protection. Further expound how to ensure the security of power grid and power supply stability.
【學(xué)位授予單位】:河北科技大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TM63;TM77
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