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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.

Inactive Publication Date: 2015-03-11
STATE GRID CORP OF CHINA +2
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the substation site, the power supply comes from the high-voltage side, and the no-load current is extremely small. In order to ensure the safe and normal operation of the transformer, the no-load current test cannot change the wiring mode of the primary equipment and should be safe and reliable.

Method used

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

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Embodiment Construction

[0019] Such as figure 1 , 3 , 4, the present invention provides a three-winding transformer loss on-line detection system, including a current collector, the current collector is connected with the three-phase transformer high-voltage side so as to collect current signals; also includes a voltage collector, the voltage collector It is connected with the three-phase CVT on the high-voltage side of the transformer so as to collect voltage signals; and a radio frequency communication control unit, which is connected with the aforementioned current collector and voltage collector by wired or wireless means, and the radio frequency communication control unit is also connected by wired The computer is connected with the computer, and the computer is connected with the aforementioned voltage collector by wire or wirelessly.

[0020] Wherein the current collector includes a micro-control unit, which is respectively connected with a data collector, an analog-to-digital converter, a GP...

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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.

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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Application Information

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IPC IPC(8): G01R31/00G01R21/133G01R27/26
Inventor 马奎张锐穆海宝吴旭涛吴波沙伟燕张涛高博张冠军丁培
Owner STATE GRID CORP OF CHINA
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