An oil self-circulation device and control method for an oil-immersed transformer
An oil-immersed transformer and transformer oil tank technology, which is applied to transformer/inductor components, transformer/inductor cooling, measuring devices, etc., can solve problems such as failure to restore power supply in time, so as to solve the problem of failure to restore power supply in time and eliminate disadvantages effect of influence
Active Publication Date: 2020-05-26
石家庄科林电气设备有限公司 +1
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to provide an oil self-circulation device and control method for an oil-immersed transformer. By improving the oil self-circulation structure and control strategy of the transformer, it solves the problem that the oil-immersed transformer cannot The problem of timely restoration of power supply, while eliminating the adverse impact of insulating oil on the environment after a transformer failure
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[0026] See attached figure 1 , An oil self-circulating device for an oil-immersed transformer, comprising a transformer and a matching circuit breaker unit, a transformer oil tank 105A arranged on the transformer body, a storage tank connected to the transformer tank 105A by means of a pressure relief oil circuit 113 and a return oil circuit 312 Oil tank 105B and a control circuit with monitoring and fault diagnosis procedures. The input end of the circuit breaker unit 304 is connected to the control circuit. A one-way variable oil pump I 103a, a speed control valve I 102a, and a cooling The internal pressure check valve 112 is connected in parallel with the one-way variable oil pump I 103a and the speed control valve I 102a. The one-way variable oil pump II 103b, The speed control valve II 102b and the above-mentioned one-way variable oil pump II 103b and speed control valve II 102b form a parallel electromagnetic control one-way valve 101. The control circuit includes a CPU m...
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The invention provides an oil self-circulation device of an oil-immersed transformer and a control method thereof and belongs to the technical field of power supply and distribution. The oil self-circulation device comprises a circuit breaker unit matched with a transformer, a transformer oil tank arranged on the transformer body, an oil storage tank connected with the transformer oil tank by means of a pressure release oil circuit and a return oil circuit, and a control circuit. The input end of the circuit breaker unit is connected with the control circuit. The pressure release oil circuit is sequentially provided with a unidirectional variable oil pump I, a speed regulation valve I, a cooler, a filter, a water distributor and drainer and an internal pressure one-way valve connected in parallel with the unidirectional variable oil pump I and the speed regulation valve I. The return oil circuit is sequentially provided with a unidirectional variable oil pump II, a speed regulation valve II, and an electromagnetic control one-way valve connected in parallel with the unidirectional variable oil pump II and the speed regulation valve II. Through improvement of the oil self-circulation device of the oil-immersed transformer and a control strategy, the problem that power supply cannot be restored in time after the transformer fails in operation is solved, and meanwhile, adverse effect of the insulation oil on the environment after the fault is eliminated.
Description
Technical field [0001] The invention relates to the technical field of electric power supply and distribution, in particular to an oil self-circulating device and a control method of an oil-immersed transformer. Background technique [0002] An oil-immersed transformer is a stationary electrical device that completes the process of high-voltage power transmission and low-voltage power distribution by changing the magnitude of the AC voltage or current, and plays the role of transferring and converting electrical energy. Traditional oil-immersed transformers usually use pressure relief valves to drain oil and pressure as a safety measure for the transformer. When the internal pressure of the transformer tank is not greater than the predetermined value, the transformer tank is in a closed state; when the transformer fails, the internal pressure of the transformer tank rises to If the value is greater than the predetermined value, the pressure release valve opens, and after the pres...
Claims
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IPC IPC(8): H01F27/14H01F27/40G01D21/02
CPCG01D21/02H01F27/14H01F27/40H01F27/402H01F2027/404H01F2027/406
Inventor 刘金超武乐涛罗海波段洪民高军利刘立刚徐超杨术苏正坤
Owner 石家庄科林电气设备有限公司