Induced current and inducted voltage measurement method of multi-circuit transmission lines on same tower

Abstract

The present invention discloses an induced current and inducted voltage measurement method of multi-circuit transmission lines on the same tower. The method comprises: determining the upkeep loop in the multi-circuit transmission lines on the same tower which have faults; changing the upkeep loop grounding mode; and employing a measurement instrument to measure the upkeep loop to obtain the corresponding inducted current and inducted voltage, wherein the inducted current includes electro-magnetic induction current and the electrostatic induction current, and the inducted voltage includes electro-magnetic induction voltage and the electrostatic induction voltage. After the multi-circuit transmission lines on the same tower have faults, through changing the grounding mode of the upkeep loop, a measurement instrument with simple operation is employed to conveniently and rapidly measure the inducted current and the inducted voltage of the upkeep loop, and because the measurement instrument is directly accessed into the upkeep loop for measurement, and the accuracy of the measurement result is relatively high, so that the technical problems can be solved that the measurement data accuracy is low and the operation of a device is complex in the prior art.

Description

technical field [0001] The invention relates to the technical field of measuring high-voltage transmission lines, in particular to a method for measuring induced current and induced voltage of multi-circuit transmission lines on the same tower. Background technique [0002] With the development of my country's industrial level, high-voltage power transmission is an important part of ensuring the normal operation of production and life. When a fault occurs in one of the AC multi-circuit transmission lines on the same tower, the induced voltage is likely to appear in the power outage circuit. For example, the electromagnetic induction voltage of the 500kV voltage level can reach 6kV. Induced current poses a great threat to construction and maintenance personnel. [0003] At present, my country only conducts electric inspection measures for power outage maintenance of transmission lines, and cannot accurately determine the specific induced voltage and current values ​​of the w...

AI Technical Summary

Problems solved by technology

When a fault occurs in one of the AC multi-circuit transmission lines on the same tower, the induced voltage is likely to appear in the power outage circuit. For example, the electromagnetic induction voltage of the 500kV voltage level can reach 6kV. Induced current poses a great threat to construction and maintenance personnel

[0003] At present, my country only conducts power inspection measures for power outage maintenance of transmission lines, and cannot accurately determine the specific induced voltage and current values ​​of the wires, and cannot provide accurate data for construction and maintenance personnel.

In the prior art, the measurement of the induced voltage mostly calculates the induced voltage of the wire by measuring the spatial field strength. Due to the indirect measurement, there is a possibility of inaccurate data in this method. At the same time, the measuring instrument is complicated, the cost is high, and the maintenance cumbersome to operate

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