Device and method for measuring high voltage of electric power system

A technology of power system and measuring device, which is applied in the field of high voltage measuring device of power system, can solve the problems of high cost and high insulation level, and achieve the effect of low cost, low insulation level and cost reduction
CN103698596AActive Publication Date: 2014-04-02CHINA THREE GORGES UNIV
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA THREE GORGES UNIV
Publication Date
2014-04-02

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Abstract

The invention discloses a device and a method for measuring high voltage of an electric power system. The tail voltage of an insulator chain is measured, and the actual voltage of a high-voltage charged conductor is linearly calculated, so that the high voltage of the electric power system is indirectly measured. The method adopts a measuring device; the measuring device comprises a voltage division and calibration circuit, a sampling hold circuit, an analog / digital (A / D) conversion circuit, a central processing unit and a communication interface circuit which are connected in sequence. The measuring device is connected to a tail plate of the insulator chain through a core wire of a coaxial cable, the tail voltage of the insulator chain is measured, and a shielded wire of the coaxial cable is directly connected with a tower. According to the device and the method for measuring the high voltage of the electric power system, the tail voltage of the insulator chain is measured, the insulation level of the device is greatly reduced, and the size and the construction cost of the device are greatly reduced; meanwhile, major failures and hidden risks during operation of the electric power system are eliminated, and personnel and equipment safety is guaranteed.
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Description

technical field

[0001] The invention relates to a power system high voltage measurement device and method, and relates to the field of power system high voltage measurement. Background technique

[0002] The function of the voltage transformer is to transform the high voltage of the power into a standard secondary voltage of 100V or lower in proportion to the secondary device for protection, metering, and instrumentation. At the same time, the use of voltage transformers can isolate high voltage from electrical workers and secondary equipment. According to the principle of voltage conversion, it can be divided into three categories: electromagnetic type, capacitive type and photoelectric type.

[0003] Electromagnetic voltage transformer transforms voltage according to the principle of electromagnetic induction. The principle is completely similar to the basic structure and transformer. It is mainly composed of primary and secondary coils, iron core and insulation. When a ...

Claims

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