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A voltage measurement method and device based on space capacitance voltage division

A technology for measuring space capacitance and voltage, which is applied to measuring devices, measuring current/voltage, measuring electrical variables, etc., can solve the problems of high cost, not easy to carry, installation, and large size of voltage transformers, and achieves low cost and easy implementation. , light weight effect

Active Publication Date: 2020-11-13
YUXI POWER SUPPLY BUREAU OF YUNNAN POWER GRID
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Problems solved by technology

[0005] The purpose of the present invention is to provide a voltage measurement method and device based on space capacitance voltage division to solve the problem of large volume and high cost of the voltage transformer when the traditional voltage transformer is used to measure the line voltage in the existing voltage measurement technology. It is not easy to carry, install and other problems, can accurately measure the line voltage, and provide accurate and reliable voltage reference parameters for the safe and stable operation of the power system

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  • A voltage measurement method and device based on space capacitance voltage division
  • A voltage measurement method and device based on space capacitance voltage division

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Embodiment Construction

[0030] The present invention will be further described in detail below in conjunction with the examples.

[0031] Those skilled in the art will understand that the following examples are only for illustrating the present invention and should not be considered as limiting the scope of the present invention. If no specific technique or condition is indicated in the examples, it shall be carried out according to the technique or condition described in the literature in this field or according to the product specification. The materials or equipment used are not indicated by the manufacturer, and they are all conventional products that can be obtained through purchase.

[0032] Those skilled in the art will understand that the following examples are only for illustrating the present invention and should not be considered as limiting the scope of the present invention. If no specific technology, connection relationship or condition is indicated in the embodiment, it shall be carri...

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Abstract

The invention relates to a voltage measurement method and device based on space capacitance voltage division, and belongs to the technical field of electric power measurement. According to the method,two groups of capacitors are connected to a to-be-tested line, the first group comprises a capacitor, an upper pole plate is directly connected to the to-be-tested line, and capacitors are distributed between a lower pole plate and the ground in a suspended manner; the second group is connected with two capacitors in series, an upper pole plate of each capacitor is directly connected to a to-be-tested line, a lower pole plate of each capacitor is connected with the upper pole plate of the capacitor, the lower pole plate of each capacitor is suspended, and capacitors are distributed between the capacitors and the ground; by measuring the capacitance and the voltage, the voltage of the line to be measured can be calculated according to the space capacitance voltage division. The method is simple in principle, easy to implement and capable of accurately measuring the line voltage. The measuring device is low in manufacturing cost, small in size, light in weight and convenient to carry and install, and is not influenced by outdoor environmental factors.

Description

technical field [0001] The invention belongs to the technical field of power measurement, and in particular relates to a voltage measurement method and device based on space capacitance voltage division. Background technique [0002] Voltage measurement is a key link in the safe and stable operation of power systems. Accurate measurement of voltage is of great significance to the reasonable conduct of electric energy trade, the normal operation of the grid overvoltage online monitoring system, intelligent equipment and relay protection, and the efficient and economical operation of the grid. At present, the demand for voltage measurement methods is showing a trend of diversification. In the field of voltage measurement, both measurement methods and measurement tools are constantly improving and perfecting. [0003] In the prior art, a voltage transformer is often used to measure the line voltage. Currently widely used voltage sensors mainly include electromagnetic, capacit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/25G01R19/155
CPCG01R19/155G01R19/25
Inventor 张学敏王文林施迎春何杰阮昱川冯程杨永旭罗康顺李传秋袁利伟杨红伟王子豪叶文华
Owner YUXI POWER SUPPLY BUREAU OF YUNNAN POWER GRID
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