An evaluation method for service performance of transformer oil flow relay
A technology of oil flow relay and transformer oil, which is applied in the direction of circuit breaker testing, etc. It can solve the problems of the change of the action characteristics of the moving plate, the untimely heat dissipation of the vehicle traction transformer, and the hidden dangers of the safe operation of the vehicle traction transformer.
Active Publication Date: 2021-04-20
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology
Due to the large impact of the traction load, the action characteristics of the moving plate will also change, which will affect the working performance of the oil flow relay
When the oil flow is insufficient, the oil flow relay cannot act in time, and the on-board traction transformer does not dissipate heat in time, which brings hidden dangers to the safe operation of the on-board traction transformer. The safe operation of the on-board transformer is very important to ensure the normal operation of the train. Accidents, so there is an urgent need for an evaluation method that can effectively judge the service performance of the oil flow relay
Method used
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Embodiment Construction
[0030] The present invention will be further described below in conjunction with accompanying drawing:
[0031] figure 2 Shown is a schematic diagram of an experimental platform for evaluating the service performance of transformer oil flow relays. from figure 1 It can be seen that an experimental method for evaluating the service performance of transformer oil flow relays includes the following steps:
[0032] Step 1: Build a comprehensive test platform for service performance evaluation of transformer oil flow relays
[0033] Build a comprehensive test platform for evaluating the service performance of transformer oil flow relays. The test platform is mainly composed of oil flow relays (1), indicating devices (2), motors (3), oil pipelines (4), standard flow meters (5), and oil tanks (6) , transformer oil (7), valve (8), 220V AC power supply (9), ammeter (10), wire (11), lower oil outlet (12), upper oil inlet (13), valve (8) 10cm away from the oil outlet (12) at the low...
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The invention discloses a method for evaluating the service performance of a transformer oil flow relay. First build a comprehensive test platform for evaluating the service performance of transformer oil flow relays, then test the operating oil flow, return oil flow, and actual contact capacity of the oil flow relay, and then calculate the operating characteristics of the oil flow relay through the operating oil flow and return oil flow. The capacity value calculates the performance parameters of the contact capacity of the oil flow relay, and then obtains the characteristic parameters for evaluating the service performance through the action characteristics of the oil flow relay and the contact capacity performance parameters, and finally evaluates the service performance of the oil flow relay through the characteristic parameters. The test platform can quickly measure the operating oil flow, return oil flow and contact capacity at the same time. The proposed evaluation method can effectively evaluate the service performance of the transformer oil flow relay.
Description
technical field [0001] The invention belongs to the field of performance evaluation of a vehicle-mounted traction transformer, and in particular relates to a method for evaluating the service performance of a transformer oil flow relay. Background technique [0002] The oil flow relay is an important device used to protect the vehicle traction transformer. The oil flow relay is used to monitor the change of the oil flow of the transformer. After the oil pump is turned on, the oil flow is generated in the relay pipe. When the oil flow reaches a certain value (operating oil flow) , the moving plate in the relay rotates, the indicating part rotates synchronously through the magnetic couple force, the signal contact is connected, and a normal signal is sent out. When the oil flow decreases to a certain value (return oil flow), the moving plate returns to send a fault signal, and the oil flow The relay switch is closed, the closed circuit is connected with the control system, and...
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IPC IPC(8): G01R31/327
CPCG01R31/327
Inventor 王东周利军廖维
Owner SOUTHWEST JIAOTONG UNIV