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a transient acceleration calculation method in an OLTC contact collision process based on a point sound source

A calculation method and acceleration technology, applied in the field of transient acceleration calculation, can solve problems such as high failure rate

Active Publication Date: 2019-04-09
HOHAI UNIV
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  • Application Information

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Problems solved by technology

[0004] The on-load tap changer is the main part of the transformer. It is also the only m

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  • a transient acceleration calculation method in an OLTC contact collision process based on a point sound source
  • a transient acceleration calculation method in an OLTC contact collision process based on a point sound source
  • a transient acceleration calculation method in an OLTC contact collision process based on a point sound source

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Embodiment Construction

[0020] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0021] This paper provides a method for calculating the transient acceleration of OLTC contacts in the collision process based on point sound sources. The specific flow chart is as follows: figure 1 As shown, the method includes the following steps:

[0022] Step 1: Measure the barrel length of the tap-changer on the outside of the on-load tap-changer, the diameter of the inner barrel on the inside, the length of the rotating shaft, the diameter from the static contact to the rotating shaft, and the diameter of the inner disc;

[0023] Step 2: Simplify the contact collision process and establish a geometric model: Since the static and dynamic contacts collide with each other through the release of the spring energy of the gunshot inside the OLTC, the relevant components are driven to push the dynamic and static contacts to collide with each other, ...

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Abstract

The invention discloses a transient acceleration calculation method in an on-load tap-changer (OLTC) contact collision process based on a point sound source. Firstly, the outer side of the OLTC is measured; then the process of releasing energy to drive related parts by a gunshot spring in the OLTC is defined as follows: elastic force directly acts on a moving contact on an OLTC single-layer disc,so that the moving contact and a fixed contact collide with each other in a point-to-point manner, and sound wave is propagated in a point pulse manner; Then a geometric model is established, and thegeometric model is imported into Ansys analysis software to obtain a simulation model; And finally, in the simulation model, an elastic force with a preset threshold is applied, and calculating is performed to obtain the transient acceleration of the moving contact and the static contact of the OLTC contact when the OLTC contact is collided by adopting a modal superposition method. According to the method, a basis is provided for further analyzing the looseness of the OLTC spring and the faults of the contact.

Description

technical field [0001] The invention relates to the field of fault monitoring and fault vibration of on-load tap changers, especially the simplification of contact collision in OLTC during the contact process of point sound source OLTC, specifically a touch point based on point sound source OLTC Transient acceleration calculation method during head impact. Background technique [0002] With the rapid development of the power industry, the volume of power equipment and the scale of the power network are also increasing day by day. The possible failure of power equipment will cause huge economic losses and adverse social impacts, which puts forward higher requirements and unprecedented requirements for power supply quality. challenge. Therefore, effective measures must be taken to improve the power supply quality of the power system and ensure the safe, reliable, economical and stable operation of power equipment and systems. Condition-based maintenance based on online monit...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20Y04S10/50
Inventor 严岩马宏忠徐艳陈明侯鹏飞
Owner HOHAI UNIV
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