On-load tap-changer state monitoring device and method based on comprehensive characteristic quantity
A comprehensive feature, on-load tapping technology, applied in the direction of circuit breaker testing, etc., can solve problems such as difficult to achieve converter transformer protection, achieve simple structure, improve accuracy and reliability, and reduce noise
Pending Publication Date: 2022-05-17
XI AN JIAOTONG UNIV
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Problems solved by technology
It can be seen that because the abnormality and damage of the on-load tap-changer are often accompanied by complex physical environments and multi-characteristic information, it is difficult for traditional relay protection measures to achieve all-round protection for the on-load tap-changer of the converter transformer. A monitoring device and method capable of effectively avoiding the explosion and rupture of the on-load tap-changer while quickly and reliably analyzing and evaluating the operating state of the on-load tap-changer
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[0038] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0039] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.
[0040] In addition, an element in the present invention is said to be "fixed" or "disposed on" another element, and it may be directly on another element or an intervening element may also exist. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also ...
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The invention discloses an on-load tap-changer state monitoring device and method based on comprehensive characteristic quantity. The device comprises a porous pressure-bearing unit, a strain starting unit, an oil pressure starting unit, a deflection monitoring unit and an alarm unit, the porous pressure-bearing unit comprises layered honeycomb aluminum, the layered honeycomb aluminum comprises a first layer of honeycomb aluminum, a second layer of honeycomb aluminum and a panel, the first layer of honeycomb aluminum is in contact with the panel, the second layer of honeycomb aluminum is connected with the tap switch top cover, and the second layer of honeycomb aluminum is located between the first layer of honeycomb aluminum and the panel; the porous pressure-bearing unit is connected with the strain starting unit, the strain starting unit and the oil pressure starting unit are both connected with the deflection monitoring unit, and the deflection monitoring unit is connected with the alarm unit. According to the invention, the state of the on-load tap-changer is monitored, analyzed and evaluated, and the overall mechanical performance of the on-load tap-changer and the accuracy and reliability of state monitoring are improved. And the used sensor meets the complex environment of high temperature, oil stain and strong electromagnetism in the on-load tap-changer from both precision and application range.
Description
technical field [0001] The invention belongs to the technical field of on-load tap changer protection in power systems, and in particular relates to a state monitoring device and method for an on-load tap changer based on comprehensive characteristic quantities. Background technique [0002] With the rapid development of UHVDC transmission projects, as the key equipment for electric energy transmission, the stable operation of converter transformers plays an important role in the reliable transportation of power grids and the flexible distribution of electric energy. The converter transformer is the core equipment for energy conversion and transmission in the converter station, and the on-load tap changer is an important component of the converter transformer. [0003] The on-load tap-changer plays an important role in adjusting reactive power, compensating grid-side voltage fluctuations and stabilizing DC voltage in the power system. It is the only movable part inside the c...
Claims
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IPC IPC(8): G01R31/327
CPCG01R31/327
Inventor 闫晨光朱述友刘苏梅周贤郭家旭
Owner XI AN JIAOTONG UNIV
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