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Non-decoupling measurement method for zero-sequence distribution parameters of non-full-line parallel four-circuit line

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

Active Publication Date: 2021-11-05
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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  • Non-decoupling measurement method for zero-sequence distribution parameters of non-full-line parallel four-circuit line
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  • Non-decoupling measurement method for zero-sequence distribution parameters of non-full-line parallel four-circuit line

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[0119] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0120] The 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, which is characterized in that the non-full-line parallel four-circuit line is composed of the first transmission line, the second Composed of a transmissi...

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Abstract

The invention relates to a non-decoupling measurement method for zero-sequence distribution parameters of a non-full-line parallel four-circuit line. The method comprises the steps of calculating a corresponding zero-sequence fundamental component through synchronously measuring the zero-sequence components of the head and tail ends of the four-circuit line in four measurement modes, calculating a line transmission matrix, and according to the transmission matrix and part of intermediate variables, and solving the zero-sequence distribution parameters of the whole four-circuit line step by step. According to the invention, the condition that parameters of all sections of the line are different due to different electromagnetic coupling relations when different lines are parallel is considered, engineering practice is met, the influence of the line distribution effect is overcome, and the measurement precision is high.

Description

technical field [0001] The invention relates to the technical field of power system measurement, in particular to a non-decoupling measurement method for zero-sequence distribution parameters of non-full-line parallel four-circuit lines. 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 and other fields. Because theoretical calculations are difficult to fully consider the complex conditions in the line erection process, the Chinese power industry standards and many related regulations stipulate that the parameters of overhead transmission lines must be obtained through actual measurements. [0003] In recent years, due to the shortage of land resources, parallel multi-circuit transmission lines, represented by four-circuit transmission lines on the same tower and non-full-li...

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Application Information

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Patent Type & Authority Applications(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