Power compensation device and power compensation method
A technology of power compensation and series resonance, which is applied in the direction of measuring devices, instruments, measuring electricity, etc., can solve the problem of unstable output voltage, triggering air switch tripping or internal protection action of frequency conversion power supply, which may trigger series resonance test circuit, power supply capacity Insufficient problems such as stable operation of the series resonance test circuit, to achieve the effect of improving stability and improving work efficiency
Active Publication Date: 2021-12-14
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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Problems solved by technology
When the current on the low-voltage side of the excitation transformer is too large, for the switch room or high-voltage indoor power supply, it may trigger the tripping of the air switch or the internal protection action of the variable frequency power supply, that is, the series resonance test circuit may be triggered for over-current protection; The output voltage is unstable due to heavy weight, that is, the power supply capacity of the generator is not enough to support the stable operation of the series resonance test circuit
The above situations will affect the stable operation of the series resonance test circuit and reduce the work efficiency of the field test
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[0026] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.
[0027] In the existing series resonance test technology, the current of the low-voltage side of the excitation transformer in the series resonance test circuit is larger than that of the high-voltage side. bigger. When the current on the low-voltage side of the excitation transformer is too large, for external power sources such as switch rooms or high-voltage indoor power supplies, it may trigger the tripping of the air switch or the internal protection action of the frequency conversion power supply, that is, the series resonance test circuit may be triggered for over-cu...
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The invention relates to a power compensation device and a power compensation method. The device comprises an external power supply, a series resonance test circuit and a power compensation circuit. The external power supply is used for supplying power to the series resonance test circuit, and the power compensation circuit is connected with the external power supply in parallel; and the power compensation circuit is used for being switched on under the condition that the power capacity of the external power supply is not enough to support the normal operation of the series resonance test circuit, or under the condition that the series resonance test circuit is subjected to overcurrent protection, so as to provide reactive power for the series resonance test circuit. By adopting the power compensation device, the operation stability of a series resonance test circuit can be improved, and the working efficiency of a field test is improved.
Description
technical field [0001] The invention relates to the technical field of preventive testing of electrical equipment, in particular to a power compensation device and a power compensation method. Background technique [0002] The preventive test of electrical equipment is an important measure to ensure the safe operation of electrical equipment. Its purpose is to check whether the electrical equipment is in good condition during long-term operation, and to grasp the insulation of electrical equipment so that it can be dealt with in time when defects are found. [0003] In the traditional technology, when conducting preventive tests on cables with a longer length than 200m, due to the problem of external power supply capacity, series resonant test circuits are often used for preventive tests. In general, for medium-length cables within the range of 200-1000m, the series resonance test circuit usually uses an external power supply of 220V voltage; for cables with a length of 1km ...
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IPC IPC(8): G05F1/70G05F1/12G01R31/00
CPCG05F1/70G05F1/12G01R31/00
Inventor许阔赵书妍
OwnerGUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD