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A method for rapid on-site commissioning evaluation of mobile transformers

An evaluation method and transformer technology, applied in the direction of instruments, measuring devices, etc., can solve the problems of non-compliance, flexibility, quickness, strong mobility, long time consumption, and inability to quickly put into operation on site, so as to reduce the cost of test equipment and time cost , Inspection and test item reduction effect

Active Publication Date: 2020-09-08
JIANGMEN POWER SUPPLY BUREAU OF GUANGDONG POWER GRID +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The whole process takes too long, which can take several days to several weeks, and cannot be quickly put into operation on site, which does not meet the flexible, fast and highly mobile characteristics of mobile transformers that are "on-demand, ready-to-use, and ready-to-use".
For the transportation of mobile transformers with oil, there is no specific standard or specification related to the on-site operation of mobile transformers in China

Method used

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  • A method for rapid on-site commissioning evaluation of mobile transformers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] During the transportation of a mobile transformer that has been used for a long time, it was monitored that the amplitude of the vertical shock vibration acceleration was 5.5g / m once. 2 , exceeding the technical requirement value 3g / m given by the manufacturer in advance 2 .

[0026] according to figure 1 The process requirements shown, after being transported to the site, the following inspections and tests should be carried out immediately:

[0027] Transformer appearance inspection, transformer oil level inspection, system primary and secondary protection inspection, overall sealing inspection, and then conduct dew point test, infrared detection, magnetic balance test, winding capacitance test to ground, frequency response analysis FRA, inner core grounding and insulation test , bushing capacitance and power factor test and transformer ratio determination TTR.

[0028] In the frequency response analysis FRA, using the transformer winding deformation tester, there ...

Embodiment 2

[0030] A mobile transformer that has been used for a long time has been in an idle state for half a year since the last regular inspection. according to figure 1 According to the requirements of the process shown, the items that need to be completed every six months: insulating oil test, AC withstand voltage test of winding and bushing, no-load current and no-load loss test, test and inspection of on-load tap changer and short-circuit impedance and Load loss test.

[0031] After testing, in the insulating oil test, using the inspection method specified in the electric power standard DL 429.1-91, if impurities and suspended matter are found in its appearance, it is necessary to stop using the mobile transformer immediately, and perform maintenance on site or return to the factory .

Embodiment 3

[0033] A mobile transformer that has been used for a long time does not have any physical quantity exceeding the limit during transportation, and the items of regular inspection or test all meet the technical requirements or operating procedures. According to figure 1 The process requirements shown meet the conditions for rapid commissioning and can be put into operation directly.

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Abstract

The invention relates to the technical field of mobile transformers, in particular to an on-site quick commissioning evaluation method for a mobile transformer. Detection items that are required to beperformed regularly and when a certain transportation parameter exceeds a technical requirement value or an operation procedure requirement value are proposed, including seven aspects of performing regularly every half a year, regularly every three years, when the instantaneous speed exceeds the limit, when the attitude angle exceeds the limit, when the temperature and humidity exceed the limit,when the amplitude of the vibration shock acceleration exceeds the limit, and when the travel distance exceeds the limit at each level of highway, the on-site quick commissioning evaluation of the mobile transformer can be effectively and reliably completed, and the limitations of the traditional transformer transportation and commissioning requirements are overcome. The commissioning time is greatly reduced and the commissioning cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of mobile transformers, and in particular relates to a quick on-site commissioning evaluation method for mobile transformers. Background technique [0002] With the rapid growth of the economic construction of major cities in my country, the number of large-load electricity users is increasing, and the load density is increasing rapidly. In order to ensure the safe and reliable operation of the power grid, it is necessary to configure vehicle-mounted vehicles with high reliability, small size and strong mobility. Mobile transformers are getting more and more attention and attention from everyone. Among them, how the mobile transformer can safely and quickly rush to the power supply site after the disaster occurs and put it into operation quickly on the spot is a key problem that needs to be solved urgently. [0003] At present, the traditional transportation of transformers needs to be transported with limit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D21/02
CPCG01D21/02
Inventor 汤振鹏刘泽庭麦荣焕陈星燃麦伟辉莫穗江曾凯军何兴华吴智影周鸿铃樊亚东王建国
Owner JIANGMEN POWER SUPPLY BUREAU OF GUANGDONG POWER GRID
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