On-site CVT integrated verification system

A test platform and test power supply technology, which is applied in the direction of measuring devices, instruments, and measuring electrical variables, can solve problems such as large constraints, affecting measurement results, and damage to test equipment, so as to reduce the uncertainty of additional errors and reduce manufacturing costs. , the effect of reducing the vertical height

Active Publication Date: 2010-06-16
STATE GRID ELECTRIC POWER RES INST
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  • Description
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Problems solved by technology

However, because this method has to go through a series of cumbersome steps of unloading-assembly-checking-loading, it is easy to cause damage to the test equipment, and it also wastes huge manpower and material resources. The relative positions of the power supply, standard instruments and measuring instruments are not the same, which increases the uncertainty of the distribution pa

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  • On-site CVT integrated verification system
  • On-site CVT integrated verification system
  • On-site CVT integrated verification system

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Embodiment Construction

[0015] The on-site CVT integrated verification system of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0016] figure 1 Marks in: 1-high voltage bushing, 2-standard voltage transformer, 3-standard capacitor, 4-series reactor, 5-excitation transformer, 6-voltage regulator, 7-vehicle-mounted test platform.

[0017] image 3 Marks in: 8-high voltage conductor, 9-ground potential shielding electrode, 10-transformer primary winding, 11-transformer secondary winding, 12-transformer core, 13-standard capacitor low-voltage electrode, 14-inductance switch Switch, 15-reactor core, 16-reactor inductance coil, 17-box body, 18-positioning connection hole, r1-high voltage conductor radius, r2-inner radius.

[0018] Marks in Figure 4: C1, C2-dividing capacitance of CVT under test, Lk-compensation reactor in CVT, Y1, Y2-load box, QS-high voltage capacitor bridge, HE-transformer calibrator.

[0019] The schematic diagra...

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Abstract

The invention provides an on-site CVT integrated verification system, which comprises a test power supply, a standard appliance, a measuring apparatus and a vehicle-mounted test platform. The test power supply consists of a series reactor, an exciting transformer and a voltage regulator; the standard appliance comprises a high-tension bushing, a standard voltage transformer and a standard capacitor, wherein the high-tension bushing, the standard voltage transformer, the standard capacitor and the series reactor are designed into an integrated sulfur hexafluoride SF6 closed combined electrical apparatus (GIS); and the standard voltage transformer is designed into an SF6 gas insulated reclining posture type structure. The system of the invention can conveniently, accurately and reliably verify the ratio error of on-site 220Kv to 500 Kv CVT (capacitor voltage transformer), the capacitance of a capacitive divider, the medium loss, and the like without unloading from a vehicle. The additional error guided by the measuring system is relatively fixed and is easy to measure, wherein the variation thereof is less than or equal to 0.02 percent.

Description

technical field [0001] The invention relates to an on-site CVT integrated verification system, which belongs to the field of calibration, verification and detection of electric equipment. Background technique [0002] CVT (capacitive voltage transformer) is an important electrical equipment in the power grid. It is mainly composed of a capacitor voltage divider and a medium-voltage transformer. The capacitor voltage divider is composed of a porcelain sleeve and a number of series capacitors installed in it. The transformer in the sealed oil tank is composed of a compensation reactor and a damping device, and the resonance is suppressed by the damping device, and the damping device is composed of a resistor and a reactor. In power plants and substations, it is very necessary to conduct reliability and safety tests on CVTs in operation to reduce the probability of accidents. In recent years, with the continuous reform of the power industry, power generation and transmission a...

Claims

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Application Information

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IPC IPC(8): G01R35/02
Inventor 章述汉周峰
Owner STATE GRID ELECTRIC POWER RES INST
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