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Method for inhibiting induction voltage and current of 750kV parallel single-line construction line

A single-circuit line, induced voltage technology, applied in electrical components, circuit devices, AC network circuits, etc., can solve the problems of difficult equipment selection, exceeding the opening and closing capacity, etc., to solve the problem of difficult equipment selection, mutual inductance parameters Equalizing, reducing the effect of induced voltage and current levels

Active Publication Date: 2013-05-01
PLANNING EVALUATION CENT SHAANXI ELECTRIC POWER +2
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AI Technical Summary

Problems solved by technology

[0035] For the coupling of two long-distance, parallel, single-circuit 750kV AC transmission lines on one outage line to generate high induced voltage and current, which exceeds the opening and closing capacity of the existing 750kV grounding switch and makes equipment selection difficult question

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  • Method for inhibiting induction voltage and current of 750kV parallel single-line construction line
  • Method for inhibiting induction voltage and current of 750kV parallel single-line construction line
  • Method for inhibiting induction voltage and current of 750kV parallel single-line construction line

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Embodiment Construction

[0065] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0066] The system for suppressing the induced voltage and current of a 750kV parallel single-circuit erection line provided by the present invention includes a double-circuit transmission line, a transmission line tower and two substations; the two substations are connected through the two-circuit transmission line.

[0067] Among them, high-voltage reactors are installed on the two circuits; the two circuits are 750kV parallel single-circuit erection lines; they are respectively the first single-circuit circuit and the second single-circuit circuit; the first single-circuit circuit and the The total length of the second single-circuit lines is 330km; the distance between the tower centers of the two-circuit transmission lines is 60m.

[0068] The method for suppressing the induced voltage and current of a 750kV parallel...

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Abstract

The invention relates to a method for inhibiting an induction voltage and an induction current of a 750kV parallel single-line construction line. Two large-distance parallel and single-line construction 750kV alternating current transmission lines are coupled on an off-the-line line to generate a higher induction voltage and a higher induction current to ensure that the problem of difficult equipment selection caused by exceeding the turning on or off capacity of the existing 750kV earthing switch is solved. The invention provides a transposition and phase sequence arrangement mode to ensure that levels of the induction voltage and the induction current applying the measure are remarkably reduced and are lower than the requirement on technical parameters of the existing equipment, and thus the equipment selection problem is solved.

Description

technical field [0001] The invention relates to the field of ultra-high voltage power transmission systems, in particular to a method for suppressing induced voltage and current of 750kV parallel single-circuit erection lines. Background technique [0002] (1) Electrical coupling between two AC transmission lines [0003] For a three-phase AC transmission line, due to the existence of mutual capacitance and mutual inductance between phases, there is an electrical coupling between the three-phase conductors. For two AC transmission lines erected in parallel, there is also mutual capacitance and mutual inductance between the two loop wires. [0004] The following takes a simplified double-terminal and double-circuit power transmission system as an example to describe the capacitive coupling relationship between the two circuits in detail, see figure 1 . In the figure, phase A of the second circuit line is taken as an example for introduction. Since the coupling relationship...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
Inventor 郑楠李润秋龚兴国刘光辉郑彬项祖涛班连庚韩亚楠周佩朋
Owner PLANNING EVALUATION CENT SHAANXI ELECTRIC POWER
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