Large oil-immersed transformer empty and load comprehensive test equipment and method

An oil-immersed transformer, 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 systems, and large footprint.

CN105044479BActive Publication Date: 2018-02-09STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2018-02-09

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Abstract

Large-scale oil-immersed transformer empty-load comprehensive test equipment, large-scale oil-immersed transformer empty-load comprehensive test equipment is divided into test power supply part and measurement system; test power supply part includes induction voltage regulator, intermediate transformer, oil Immersion intensive compensation capacitor bank and test control system; measurement system includes precision measurement current transformer, voltage transformer and power analyzer. It is able to conduct on-site no-load and load loss measurement tests for 110kV and 220kV voltage level transformers, and can complete transformer no-load current measurement, transformer no-load loss measurement, transformer no-load harmonic measurement, transformer short-circuit impedance measurement and transformer load loss measurement, and It has the function of automatic calculation of empty and load loss measurement test results.
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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)...

Examples

Embodiment Construction

[0049] like 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] like 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 precisio...