Loss online detecting system for three-winding transformer and loss calculating method

A transformer loss and detection system technology, applied in the direction of instruments, measuring electricity, measuring devices, etc., can solve the problems of small no-load current, unable to change the wiring mode of primary equipment, etc.
CN104407240AInactive Publication Date: 2015-03-11STATE GRID CORP OF CHINA +2
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
STATE GRID CORP OF CHINA
Publication Date
2015-03-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a loss online detecting system of a three-winding transformer and a loss calculating method. The loss online detecting system is characterized by comprising a current collector and further comprising a voltage collector and a radio frequency communication control unit, wherein the current collector is connected to a three phase at a high-voltage side of the transformer for collecting a current signal; the voltage collector is connected to the three phase CVT at the high-voltage side of the transformer for acquiring a voltage signal; the radio frequency communication control unit is connected to the current collector and the voltage collector in a wired or wireless manner; the radio frequency communication unit is further connected to a computer in a wired manner; and the computer is connected to the voltage collector in the wired or wireless manner. The invention discloses a site transformer no-load loss measuring system which can be used for measuring the no-load current and the no-load loss of the transformer on sites such as a transformer substation and providing comparison basis for the maintenance of the transformer.
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Description

technical field

[0001] The invention relates to a three-winding transformer loss on-line detection system and a loss calculation method. Background technique

[0002] As the construction scale and transmission capacity of ultra-high voltage power grids increase, the safe operation of corresponding transformers will be extremely important. The no-load characteristic curve of the main transformer will provide a comparison basis for future transformer operation testing. The no-load test of the transformer is a test to measure the no-load loss and no-load current of the transformer by applying a rated voltage with a rated frequency waveform of an approximate sine wave from any winding of the transformer, and when the other windings are open-circuited. During the manufacturing process of the transformer, in order to check the quality of the product, multiple no-load tests need to be carried out; in the handover preventive test, no-load tests should be carried out when the transf...

Claims

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