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Optical fiber type voltage measurement method and measuring set thereof

A technology of voltage measurement and optical fiber, which is applied in the field of optical fiber voltage measurement method and its measurement device, which can solve the problems of complex system structure, inability to increase the electric field strength, maximum measurement field strength and measurement distance parameters are not high, and achieve frequency response Good, flexible measurement, and improved anti-interference performance

Active Publication Date: 2009-03-11
SHAANXI ELECTRIC POWER RES INST +1
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Problems solved by technology

To measure the voltage with the field strength method, it is necessary to calculate the voltage of the charged body under test based on the relationship between the voltage of the charged body and the electric field strength of the measured point. Not high, cannot be used for the measurement of higher electric field strength, and the system structure is also relatively complicated

Method used

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  • Optical fiber type voltage measurement method and measuring set thereof
  • Optical fiber type voltage measurement method and measuring set thereof
  • Optical fiber type voltage measurement method and measuring set thereof

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Embodiment Construction

[0020] Referring to accompanying drawing, the measurement principle of fiber-optic voltage measuring method and measuring device thereof of the present invention is: place a metal induction pole plate on the surface of high-voltage conductor (high-voltage conductor), metal induction pole plate and high-voltage conductor form capacitance C2, and Ground forms capacitor C1.

[0021] When the voltage of the high-voltage conductor to the ground is V (AC voltage, the same below),

[0022] Voltage on C2: V 2 = C 1 C 1 + C 2 V - - - ( 1 )

[0023] make K = C 1 + ...

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Abstract

The invention relates to an optic fiber type voltage measuring method used in an electric-power grid system for measuring various transient voltages, and a device thereof. The measurement method comprises the steps: a metal induction polar plate is placed on the surface of a measured high-voltage conductor; capacitances formed by the induction polar plate respectively with the measured high-voltage conductor and the ground are utilized for forming a capacitive voltage divider; after the voltage dividing ratio of the capacitive voltage divider and the voltage value on the capacitance between the induction polar plate and the measured high-voltage conductor are measured, the voltage value to ground of the measured high-voltage conductor is acquired by conversion. The measuring device consists of a front end processor externally provided with the metal induction polar plate, an optic fiber, a photoelectric converting module and a computer part, wherein, the induction polar plate and a shielding case of the front end processor form a capacitance type voltage sensor. Compared with the prior art, the invention adopts the method that the capacitance type voltage sensor directly measures the field strength of an electrified body surface to measure the voltage, thus having the advantages of good measurement property, simple structure and convenient use.

Description

technical field [0001] The invention belongs to the technical field of power measurement, and relates to a fiber-optic voltage measurement method and a measurement device for measuring various transient voltages in a power grid system. Background technique [0002] Many system debugging tests in the power system are almost inseparable from the measurement of the grid voltage. With the development of power grid construction at all levels, especially the construction of ultra-high voltage and ultra-high voltage power grids, the workload and difficulty of high voltage measurement are also increasing, especially the measurement of various transient voltages in power systems is more difficult. In the past, there are mainly two conventional voltage measurement methods in the power system, that is, the method using voltage transformer measurement method and the method using the end screen measurement method of high voltage bushing. There are two types of voltage transformers, elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00G01R15/16G08C23/06
Inventor 卢江平
Owner SHAANXI ELECTRIC POWER RES INST
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