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Operation control method, device and equipment for prolonging service life of defective tapping switch

A technology of tap changer and operation control, applied in the field of power system, can solve the problems affecting the stable operation of the DC system, the manufacturer cannot respond to replacement quickly, and the tap changer cannot be replaced in time, so as to ensure safe and stable operation, prolong life, and save money. cost effect

Inactive Publication Date: 2020-08-07
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the process of implementing the present invention, the inventors found that the prior art has at least the following problems: the direct replacement of the defective tap changer is expensive, which is not conducive to the utilization of resources
And when encountering equipment procurement and long production cycle, the manufacturer cannot respond quickly for replacement, or there are multiple defective devices at the same time, and all defective tap-changers cannot be replaced in time, etc., operating the defective tap-changers in the original way will affect Stable operation of DC system

Method used

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  • Operation control method, device and equipment for prolonging service life of defective tapping switch
  • Operation control method, device and equipment for prolonging service life of defective tapping switch
  • Operation control method, device and equipment for prolonging service life of defective tapping switch

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Embodiment 1

[0036] see figure 1 , is a schematic flowchart of steps of an operation control method for prolonging the service life of a defective tap changer provided in Embodiment 1 of the present invention. An operation control method for prolonging the service life of a defective tap changer provided by Embodiment 1 of the present invention is executed through steps S11 to S14:

[0037] S11. When there is a defective tap changer in the DC system, switch the control mode of all tap changers from the angle control mode to the voltage control mode (Udi0 control mode); wherein, all the tap changers include the defective tap changer tap-changer and non-defective tap-changer; the defective tap-changer means a tap-changer that is defective but still functional.

[0038] In the DC system, the tap changer of the converter transformer adjusts the secondary side tap position of the converter transformer, and then adjusts the primary / secondary side turns ratio of the converter transformer, and fi...

Embodiment 2

[0057] see figure 2 , is a schematic flowchart of the steps of a preferred operation control method for prolonging the service life of a defective tap changer provided in Embodiment 2 of the present invention. Embodiment 2 of the present invention is implemented on the basis of the operation control method for prolonging the service life of the defective tap changer described in Embodiment 1, specifically through steps S21 to S27:

[0058] S21. When there is a defective tap-changer in the DC system, switch the control mode of all tap-changers from the angle control mode to the voltage control mode; wherein, all the tap-changers include the defective tap-changer and the non-defective tap-changer tap-changer; the defective tap-changer means a tap-changer that is defective but still functional.

[0059] S22. Send a first scheduling control instruction to adjust the operation mode of the DC system; wherein, the first scheduling control instruction is used to control the DC syste...

Embodiment 3

[0078] see image 3 , is a structural schematic diagram of an operation control device for prolonging the service life of a defective tap changer provided by Embodiment 3 of the present invention. The third embodiment of the present invention provides an operation control device 30 for prolonging the service life of a defective tap changer, including a control mode switching module 31; wherein,

[0079] The control mode switching module 31 is used to switch the control mode of all tap changers from angle control mode to voltage control mode when there is a defective tap changer in the DC system; The defective tap-changer and the non-defective tap-changer; the defective tap-changer means a tap-changer that is defective but still functional.

[0080] As a preferred embodiment, the operation control device 30 also includes an action interval time adjustment module 32 and an action instruction sending module 33, wherein,

[0081] The action interval time adjustment module 32 is ...

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PUM

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Abstract

The invention discloses an operation control method for prolonging the service life of a defective tapping switch. According to the method, the control modes of all tapping switches are switched froman angle control mode to a voltage control mode when a defective tapping switch exists in a DC system, wherein all the tapping switches comprise the defective tapping switch and a defect-free tappingswitch, and the defective tapping switch represents a tapping switch which has defects and can still operate; and the operation mode and the restart mode of the DC system are correspondingly adjusted.The invention further discloses a corresponding operation control device and equipment. By implementing the embodiment of the invention, the action times of the tapping switch can be effectively reduced under the condition that the tapping switch which has defects but still can operate cannot be replaced in time, so that the service life of the tapping switch is prolonged, and the safe and stableoperation of the system is ensured.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to an operation control method, device and equipment for prolonging the service life of a defective tap changer. Background technique [0002] The DC converter transformer is an important part of the DC project, and its function is to transform the AC voltage into a voltage level suitable for the DC converter. The tap changer of the converter transformer can adjust the secondary side voltage by adjusting the position of the tap on the secondary side of the converter transformer, and then adjust the primary / secondary side turns ratio of the converter transformer, so that the firing angle of the DC system is at a certain safe level. within the operating range. [0003] In the actual operation of the DC system, the tap changer may have defects such as cracks. In this case, the defective tap changer can still operate, but it is in an unsafe state. If the system is still running ...

Claims

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Application Information

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IPC IPC(8): H02M7/04H02J1/00
CPCH02J1/00H02M7/043
Inventor 崔柳林雪华陈德扬黄立滨郭琦
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD