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Method for achieving charged oil supplement of load switch

A switch and oil replenishment technology, applied in the field of transformers, can solve problems such as threats to the safety of the power grid, on-load switches, and main transformer explosions, and achieve the effect of simple implementation and simple control

Inactive Publication Date: 2014-01-22
洛阳华明变压器有限公司
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Problems solved by technology

If the operation is forced, the arc generated by the contacts cannot be extinguished during the operation, which will cause a large amount of gas and transformer oil to rush to the oil conservator to activate the gas relay, causing the main transformer to trip; at the same time, if the energy generated by the arc cannot be released in time , it may cause the on-load switch or even the main transformer to explode, seriously threatening the safety of the power grid
The conventional method of replenishing oil for the on-load switch is to carry out in the case of a power failure of the main transformer. The power failure of the main transformer inevitably requires load adjustment, and multiple switching operations will bring certain risks.

Method used

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  • Method for achieving charged oil supplement of load switch

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Embodiment Construction

[0008] The three-phase oil-immersed on-load tap changer, whose model is SFS29-180000 / 220, the voltage combination is (220+1061.5%) / 115 / 10.5kV, and the rated capacity is 180MVA / 180MVA / 60MVA. The model of the on-load switch is MIII600Y-123-D, the model of the online oil filter device is XS2-1, and the oil flow rate is 3L / min as an example.

[0009] 1. Analysis: Because when the oil supply passes through the gas relay, when the flow rate is greater than 1.2m / s, the equivalent flow rate is about 31.8L / min, the gas relay of the on-load switch malfunctions, causing the three-side switch of the main transformer to trip.

[0010] The working principle of the oil pump replenishing oil using the oil filter device is as follows: figure 1 As shown, the oil inlet pipe of the on-load switch is located on the upper part of the oil chamber (4) of the on-load switch core. The oil tank (1) is replenished with oil. At this time, the flow rate is 3L / min, the flow rate is small, and the impact of...

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Abstract

Provided is a method for achieving charged oil supplement of a load switch. An oil pump of an oil filter device is used for achieving charged oil supplement of the load switch, the flow rate is 3L / min, oil has small impact when passing through a gas relay, and false operation is difficult to cause; in an oil supplement process, the new oil is controlled strictly, and gas is prevented from entering the load switch. By the adoption of the method, oil supplement control is simple, sufficient consideration is given to influence on the gas relay of the load switch caused by oil streams and gas streams during oil supplement, and an implementation process is simple and convenient to achieve.

Description

technical field [0001] The invention relates to the field of transformers, in particular to a method for charging oil to an on-load switch. Background technique [0002] The on-load tap changer is an indispensable equipment in the modern power grid. It is used in the power grid for reverse voltage regulation, grid connection, reactive power distribution, and load flow adjustment. Its operating status directly affects the reliability of the system and the reliability of other electrical equipment. normal operation. The on-load switch is the key equipment for the transformer to realize on-load voltage regulation. Before voltage regulation, the oil level of the oil conservator of the on-load switch must be normal. Once there is no oil or no oil, oil must be replenished in time and operation is prohibited. If the operation is forced, the arc generated by the contacts cannot be extinguished during the operation, which will cause a large amount of gas and transformer oil to rush ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/14H01F29/04
Inventor 郭克磊范新跃
Owner 洛阳华明变压器有限公司
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