Dry capacitor type voltage transformer

A technology of voltage transformers and capacitive voltage dividers, applied in the direction of inductors, voltage dividers, transformers, etc., can solve the problems of high cost, leakage, environmental pollution, etc., reduce the plate area and field strength, and avoid leakage Leakage, to avoid the effect of ferroresonance
CN1508819AInactive Publication Date: 2004-06-30็Ž‹ๆ—ฅๆ–ฐ
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
็Ž‹ๆ—ฅๆ–ฐ
Publication Date
2004-06-30
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention relates to dry type capacitor voltage transformer utilized in AC high voltage power system and DC electrical power system with 110KV and higher voltage. The transformer comprises capacitor voltage divider utilized in circuit board for signal conversion and amplification treatment. The capacitor voltage divider in insulating sleeve comprises two pieces of cascaded capacitive components. Umbrella skirt covers the insulating sleeve. Based on need, voltage signal is picked out from a plate electrode in middle of the cascaded capacitive components. The said signal through the circuit board for signal conversion and amplification treatment is output to measuring and displaying device and protecting device. Advantages of the invention are dry type, free of maintenance, high insulating strength and small volume.
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Description

technical field

[0001] The invention belongs to the measurement and protection equipment in the power system, in particular to a voltage transformer used in the AC high-voltage power system including 110KV and above and the DC power system. Background technique

[0002] At present, the voltage transformers used in the AC high-voltage power system with a voltage level of 110KV and above are divided into two types. One is an electromagnetic voltage transformer, which is easy to excite ferromagnetic resonance, and has poor reliability and high cost during operation; the other is a capacitive voltage transformer, whose working principle is to reflect the high voltage through the tap voltage value of a capacitor voltage divider. The voltage value at the terminal; the tap is connected to the electromagnetic device, and the electromagnetic device is composed of an intermediate transformer, a compensation reactor and a ferromagnetic resonance control circuit; the secondary winding o...

Claims

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