Live working method for replacing distribution transformer

Abstract

The invention relates to a live working method for replacing a distribution transformer. The method comprises the following steps of: (a) respectively installing an insulated cable at the front end of the high-voltage circuit breaker of a transformer to be replaced and the back end of the low-voltage circuit breaker, respectively connecting to breakers on both sides of a mobile transformer used for temporary power supply, thereby forming an all-insulated bypath system connected in parallel to the original high-low voltage changeover system after closing the breakers on the two sides; (b) disconnecting the original high-low voltage changeover system, and replacing the original high-low voltage changeover system with a temporarily erected all-insulated bypath system; (c) and after the new high-low voltage changeover system of the distribution transformer operates normally, disconnecting and removing the all-insulated bypass changeover system. On the premise of uninterrupted power supply to users, the invention replaces the distribution transformer on load, thereby avoiding users' inconvenience and loss caused by power cut and enhancing the power distribution reliability.

Description

technical field [0001] The invention relates to a method for replacing a transformer with electricity, in particular to a method for replacing a distribution transformer with electricity under the condition of continuous power supply. Background technique [0002] Transformer is an important device in power system. It uses the principle of electromagnetic induction to convert AC power of one voltage level into AC power of another voltage level. The distribution transformer is an important power equipment that directly converts high-voltage electric energy into life and produces low-voltage electric energy. Therefore, distribution transformers are indispensable in daily life and production. If the distribution transformer fails, it will cause a power outage for the user. If a 400kVA public transformer is to be increased or overhauled, and the current power outage method is used to deal with it, the low-voltage side load will inevitably be cut off first, causing power outage...

AI Technical Summary

Problems solved by technology

If the distribution transformer fails, it will cause power outages for users

If a 400kVA public transformer is to be increased or overhauled, and the current power outage method is used to deal with it, the low-voltage side load will inevitably be cut off first, causing power outages for all users at the back end of the public transformer

On the one hand, this may disrupt the normal production of enterprises, factories and mines, and cause economic losses of varying degrees. It may also affect the normal electricity consumption of residential users, bring a lot of inconvenience to life, and bring certain negative effects to the image and reputation of power supply companies.

On the other hand, it will reduce the reliability of continuous power supply, resulting in a reduction in power supply and affecting the economic benefits of power supply companies