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Resonance voltage resistant test system and voltage resistant test method of sample with large capacitance

A technology of withstand voltage test and capacitance, which is applied in the direction of testing dielectric strength, etc., can solve problems such as not meeting the test requirements, and achieve the effect of avoiding capacity rise effect, good effect, and improving load capacity

Active Publication Date: 2012-10-10
四川中鼎科技有限公司
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  • Description
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Problems solved by technology

[0010] 4. Therefore, the maximum output current I of the step-up transformer is usually = 25A under the existing technical conditions, but for the large capacitance test, I can reach more than 50A, so it cannot meet the test requirements

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  • Resonance voltage resistant test system and voltage resistant test method of sample with large capacitance

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[0025] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0026] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0027] Such as figure 2 As shown, a resonant withstand voltage test system for a large capacitance test product: the variable frequency power supply 21 is connected in series with a step-up transformer 22, a single set of compensation reactor 23, and a voltage divider 24, and the segmented test product 25 and two sets of compensation The reactor is connected in parallel with the voltage divider 24, and by analogy, there can also be multiple ...

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Abstract

The invention discloses resonance voltage resistant test system and voltage resistant test method of a sample with large capacitance. A series compensation electric reactor group is dispersively distributed to form a mixed series and parallel connection structure so as to trend to a distribution parameter. The invention overcomes the defect of concentrated distribution of compensating inductancesin the conventional series resonance voltage resistant method, enables a frequency converting power supply and a boosting transformer to just provide less power consumption, greatly improves the loading capacity of a frequency converting resonance voltage resistant device, realizes the scene alternating current voltage resistance of large and superlarge GISs, a long-distance power transmission high-voltage cable and a constant voltage transformer CVT with extremely high requirement on frequency, and can effectively prevent the capacitance improving effect caused by large capacitance and insulation damage caused by boosting of voltage between a tested sample clamping space and the tail end, and the more and more dispersive the compensation electric reactor group is, the better the effect is.

Description

technical field [0001] The invention relates to a high-voltage withstand voltage test method, which is especially suitable for the high-voltage test method of large-capacitance test products such as GIS (gas-insulated metal-sealed switchgear), cables, and CVT (capacitive voltage transformer). Background technique [0002] According to regulations, before GIS, cable and CVT are put into operation, after overhaul and after insulation accidents, in order to check whether there are insulation defects in the primary components and whether the insulation level meets the requirements of relevant standards and the requirements of the manufacturer's technical conditions, on-site AC withstand voltage testing must be carried out. Test, timely and effectively find insulation defects in manufacturing, transportation, installation and maintenance processes. [0003] At present, the on-site AC withstand voltage test of large-capacity and high-voltage test products all use frequency convers...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12
Inventor 王先秀朱天宇蒋旭平谭萍丁韬杨光
Owner 四川中鼎科技有限公司
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