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A non-decoupling measurement method for zero-sequence distribution parameters of non-whole-line parallel four-circuit lines

A parallel four and loop line technology, applied in impedance measurement, capacitance measurement, measurement device and other directions, can solve the problem of inability to accurately measure the line parameters of the "three-segment" line structure

Active Publication Date: 2022-06-17
WUHAN UNIV
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Problems solved by technology

[0005] The embodiment of the present invention provides a non-decoupling measurement method for the zero-sequence distribution parameters of the non-full-line parallel four-circuit line, so as to overcome the problem that the related technology cannot accurately measure the line parameters of the "three-segment" line structure

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  • A non-decoupling measurement method for zero-sequence distribution parameters of non-whole-line parallel four-circuit lines
  • A non-decoupling measurement method for zero-sequence distribution parameters of non-whole-line parallel four-circuit lines
  • A non-decoupling measurement method for zero-sequence distribution parameters of non-whole-line parallel four-circuit lines

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[0119] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0120] An embodiment of the present invention provides a non-decoupling measurement method for zero-sequence distribution parameters of a non-full-line parallel four-circuit line, characterized in that the non-full-line parallel four-circuit line consists of a first transmission line, a second transmission line, a third A transmission line a...

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Abstract

This application relates to a non-decoupling measurement method for the zero-sequence distribution parameters of a non-full-line parallel four-circuit line. The corresponding zero-sequence fundamental wave component is calculated by synchronously measuring the zero-sequence components of the four-circuit line at the beginning and end of the line in four measurement modes. Based on this, the line transmission matrix is ​​calculated, and according to the transmission matrix and some intermediate variables, the zero-sequence distribution parameters of the four-circuit line are gradually obtained. The invention considers the situation that the parameters of each section of the line are different due to the different electromagnetic coupling relationship when different loop lines are parallel, conforms to the engineering practice, overcomes the influence of the line distribution effect, and has high measurement accuracy.

Description

technical field [0001] The invention relates to the technical field of power system measurement, in particular to a non-decoupled measurement method for zero-sequence distribution parameters of a non-full-line parallel four-circuit line. Background technique [0002] Transmission line parameters are of great significance to the numerical analysis of transmission line models, and are widely used in power system power flow calculation, fault analysis, protection setting, and fault location. Since it is difficult to fully consider the complex situation in the line erection process in theoretical calculations, the Chinese power industry standards and many related regulations stipulate that the parameters of overhead transmission lines must be obtained through actual measurement. [0003] In recent years, due to the shortage of land resources, the sharing of transmission corridors for parallel multi-circuit transmission lines represented by four-circuit transmission lines in the ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/04G01R27/08G01R27/16G01R27/26
CPCG01R27/04G01R27/08G01R27/16G01R27/2605G01R27/26
Inventor 胡志坚牟洪江高明鑫
Owner WUHAN UNIV