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Field calibration method of non-contact type transient voltage measurement device of alternating-current substation

A technology for measuring devices and transient voltages, applied to measuring devices, measuring electrical variables, instruments, etc., can solve problems affecting the accuracy of three-phase transient voltages, and achieve the effect of ensuring accuracy

Active Publication Date: 2018-11-30
STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST +3
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Problems solved by technology

If the influence of side phase conductors is not considered, it will seriously affect the accuracy of three-phase transient voltage measurement

Method used

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  • Field calibration method of non-contact type transient voltage measurement device of alternating-current substation
  • Field calibration method of non-contact type transient voltage measurement device of alternating-current substation
  • Field calibration method of non-contact type transient voltage measurement device of alternating-current substation

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Experimental program
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Embodiment

[0039] Such as figure 1 As shown, the A-phase electric field sensor 4 , B-phase electric field sensor 5 and C-phase electric field sensor 6 are arranged directly below the A-phase conductor 1 , B-phase conductor 2 and C-phase conductor 3 of the AC substation in this embodiment. The A-phase electric field sensor 4, the B-phase electric field sensor 5 and the C-phase electric field sensor 6 are all static electric field meters whose model is TMZ-002.

[0040] In order to realize on-site calibration of the measuring device composed of three electric field sensors ( 4 , 5 , 6 ), the on-site calibration system provided in this embodiment includes an impulse voltage generator 7 , a voltage divider 8 and a data processing system 9 . The impulse voltage generating device is used to generate the standard transient voltage waveform applied to the three-phase wires, and the impulse voltage generating device model L-200k is used. The voltage divider is used to measure the transient volta...

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Abstract

The invention discloses a field calibration method of a non-contact type transient voltage measurement device of an alternating-current substation. High-voltage transient voltage is applied to three-phase conductor wires in sequence; the composite transformation coefficient of the measurement device is obtained by utilization of the transient voltage on three electric field sensors and the three-phase conductor wires; field calibration on the measurement device is completed; the gap of the field calibration technology of the non-contact type transient voltage measurement device of the alternating-current substation is filled; because influence of the three-phase conductor wires on the electric field sensors is considered in field calibration, the transient voltage measurement accuracy of apower transmission line can be ensured; and thus, the method has great important meaning for monitoring the alternating-current substation.

Description

technical field [0001] The invention belongs to the technical field of transient voltage measurement of electric power systems, and relates to a transient voltage measurement technology of an AC substation and an AC overhead transmission circuit, in particular to an on-site calibration method of a non-contact transient voltage measurement device of an AC substation. Background technique [0002] The transient voltage waveform measured during AC substation monitoring has important reference value for analyzing the cause of substation faults and optimizing the insulation configuration scheme. [0003] The existing potential transformer (PT) or capacitive voltage transformer (CVT) in the substation is difficult to be directly used to measure the transient voltage of the AC substation due to its limited bandwidth. In recent years, a variety of non-contact transient voltage measurement techniques have been proposed and actually applied to the transient voltage measurement of subs...

Claims

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Application Information

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IPC IPC(8): G01R35/00
CPCG01R35/005
Inventor 谢施君苏少春龙兆芝李文婷刘毅姜南希张晨萌张榆花若蓉
Owner STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST
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