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Method for replacing main transformer of power system

A replacement method and power system technology, which is applied to electrical components, switchgear, etc., can solve the problems of long working hours in power outages, inability to work at the same time, and only step-by-step operations, so as to achieve reduced workload, high operating efficiency, and improved power supply The effect of continuity

Inactive Publication Date: 2011-05-04
NANYANG POWER SUPPLY COMPANY OF STATE GRID HENAN ELECTRIC POWER
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Problems solved by technology

It can be seen that many processes are carried out in the event of a power outage, and there are many construction workers. Due to the limitation of the work space, the workers cannot work at the same time, and can only operate step by step, which is inefficient. Therefore, the workload during the power outage is heavy and the working time is long. , according to experience, the power outage operation time is more than 120 hours

Method used

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Embodiment Construction

[0006] The method for replacing the main transformer of the power system is to operate according to the following process steps: 1. First, carry out main transformer assembly, oil injection, and high-voltage test on the new main transformer when the original old main transformer is not powered off; The sub-transformer is supported by sleepers to lay the guide rails, and the sleepers are placed under the guide rails. When placing the guide rails, carefully check that the sleepers are neatly placed without suspension, and set the hydraulic jack as the power device; 3. Disconnect the power supply circuit of the old main transformer, and put The old main transformer and the grounding grid are cut off by two grounding flat irons, and then each part is inspected. After all inspections are correct, the old main transformer is removed as a whole according to the exit route; after the old main transformer exits, check the basic level of the main transformer with a spirit level. The work...

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Abstract

The invention discloses a method for replacing a main transformer of a power system. The method comprises the following steps of carrying out the main transformer assembly, lubrication and high-voltage test on a novel main transformer without powering off the prior main transformer; wholly moving the prior main transformer out along a withdrawal route after power off; and after the novel main transformer is wholly moved on the position, measuring a DC resistance of an operational tap of the novel main transformer, and realizing the corresponding connection of wire boards of high, middle and low casings with high, middle and low lead wires in the novel main transformer to complete the replacement of the main transformer. Compared with the prior art, the method has the advantages of reasonable process, high operating efficiency, quite short power-off operation time, high power supply continuity, stable operation of the system and obvious economic benefit.

Description

technical field [0001] The invention belongs to the technical field of high-voltage power supply, and in particular relates to a method for replacing a main transformer of a power system. Background technique [0002] Due to the rapid growth of electricity load in recent years, the capacity of the main transformers of some substations in use can no longer meet the requirements. In this way, the original two main transformers in the substation need to be transformed in order to increase the main transformer capacity. The replacement of the main transformer in a substation is generally performed when the load is small, so that the small load is transferred out through another main transformer in the station. Due to the accidental change of the power load, the replacement of the main transformer during a long-term power outage may have a negative impact on industrial production and Residents' lives are greatly affected, so the power outage time required for engineering construc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02B3/00
Inventor 薛洛良李望北孙更杨澍潮郑卫东
Owner NANYANG POWER SUPPLY COMPANY OF STATE GRID HENAN ELECTRIC POWER
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