Apparatus for large-scale oil-immersed transformer no-load and on-load comprehensive tests and method

An oil-immersed transformer, a comprehensive test technology, applied in the direction of instruments, measuring electrical variables, measuring devices, etc., can solve the problems of increasing test measurement and calculation errors, imperfect control system, inconvenient transportation and handling wiring, etc.

Active Publication Date: 2015-11-11
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +2
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in the actual field, due to the large capacity of the transformer under test, especially for large oil-immersed power transformers, the capacity of the field test power supply required is large, so each test requires a huge investment in test equipment, which not only occupies an area The area is large, and transportation, handling, and wiring are very inconvenient, and it

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  • Apparatus for large-scale oil-immersed transformer no-load and on-load comprehensive tests and method
  • Apparatus for large-scale oil-immersed transformer no-load and on-load comprehensive tests and method
  • Apparatus for large-scale oil-immersed transformer no-load and on-load comprehensive tests and method

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Embodiment Construction

[0049] Such as figure 1 , 6As shown, the large oil-immersed transformer empty and load comprehensive test equipment and method of the present invention. Among them, the large-scale oil-immersed transformer empty and load comprehensive test equipment is divided into the test power supply part and the measurement system. The test power supply part includes induction voltage regulator 2, intermediate transformer 3, oil-immersed dense compensation capacitor bank 4 and test control system; the measurement system includes precision measurement current transformer, voltage transformer and power analyzer. The measuring system of the invention is a large oil-immersed transformer no-load loss measuring device.

[0050] Such as Image 6 As shown, the dotted line part is the schematic diagram of the primary circuit of the present invention, which is composed of five parts: switch cabinet 1, induction voltage regulator 2, intermediate transformer 3, compensation capacitor bank 4, and pr...

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Abstract

The invention discloses an apparatus for large-scale oil-immersed transformer no-load and on-load comprehensive tests and a method. The apparatus is composed of a test power source part and a measurement system. The test power source part includes an induction regulator, an intermediate transformer, an oil-immersed intensive compensation capacitor bank and a test control system which are successively connected via a circuit. The measurement system includes a precision measurement current transformer, a voltage transformer and a power analyzer. The apparatus can conduct on-site no-load and on-load loss measurement tests on 110-kV and 220-kV voltage class transformers, and can complete measurements of no-load current, no-load loss, no-load harmonic waves, short circuit impedance and load loss of transformers, and can automatically calculate the measurement test results of no-load and load loss.

Description

technical field [0001] The invention relates to the technical field of high-voltage electrical equipment testing, in particular to field application devices for no-load and load tests of oil-immersed transformers with voltage levels of 110kV and 220kV. Background technique [0002] Transformer no-load and load tests are important test items for oil-immersed power transformers. The no-load test generally applies a sine wave of rated voltage and rated frequency from the winding with a lower voltage, and the other windings are open-circuited, and the transformer loss and excitation current are measured under this condition. Whether there is a defect in the magnetic circuit of the transformer can be checked through the no-load test. The load test generally applies an AC voltage of rated frequency to the high-voltage winding of the transformer, so that the current in the winding reaches the rated value, the low-voltage side winding is short-circuited, and other windings (if any)...

Claims

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Application Information

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IPC IPC(8): G01R31/00
Inventor 王伟付刚郑含博王立楠李予全李晓纲
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
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