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Method and device for correcting zero-sequence impedance parameters

A zero-sequence impedance and parameter technology, applied in the field of power systems, can solve problems such as affecting the normal power supply of transmission lines

Active Publication Date: 2019-06-28
STATE GRID BEIJING ELECTRIC POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present invention provides a zero-sequence impedance parameter correction method and device to at least solve the problem of correcting the zero-sequence impedance parameter in the prior art by re-measuring the zero-sequence impedance parameter, which affects the normal power supply of the transmission line question

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  • Method and device for correcting zero-sequence impedance parameters

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Embodiment 1

[0031] According to an embodiment of the present invention, an embodiment of a method for correcting zero-sequence impedance parameters is provided. It should be noted that the steps shown in the flow chart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions , and, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.

[0032] image 3 is a flow chart of a method for correcting zero-sequence impedance parameters according to an embodiment of the present invention, such as image 3 As shown, the method includes the following steps:

[0033] Step S302, after erecting at least one group of second transmission lines around the first transmission line, acquire the transmission line information of the first transmission line, the transmission line information of each group of second transmission lines, ...

Embodiment 2

[0067] According to an embodiment of the present invention, an embodiment of a zero-sequence impedance parameter correction device is provided.

[0068] Figure 9 is a schematic diagram of a zero-sequence impedance parameter correction device according to an embodiment of the present invention, such as Figure 9 As shown, the device includes:

[0069] The acquisition module 91 is configured to acquire the transmission line information of the first transmission line, the transmission line information of each group of second transmission lines, and the first transmission line and each group of second transmission lines after erecting at least one group of second transmission lines around the first transmission line. Spacing information between the second transmission lines.

[0070] Optionally, in the above embodiments of the present invention, the transmission line information includes one or more of the following: conductor parameters, overhead ground wire parameters, tower ...

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Abstract

The invention discloses a correction method and device for zero sequence impedance parameters. The method includes: after erecting at least one set of second transmission lines around a first transmission line, acquiring transmission line information of the first transmission line, transmission line information of the second transmission lines and spacing information between the first transmission line and the second transmission lines; according to the transmission line information of the first transmission line, the transmission line information of the second transmission lines and the spacing information between the first transmission line and the second transmission lines, acquiring equivalent circuits of the first transmission line and the second transmission lines; performing equivalent processing on the equivalent circuits of the first transmission line and the second transmission lines to acquire a corrected value of the zero sequence impedance parameters of the first transmission line. By the arrangement, the technical problem that the zero sequence impedance parameters are corrected by remeasurement of the zero sequence impedance parameters resulting in affecting normal power supply of the transmission lines in the prior art is solved.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a method and device for correcting zero-sequence impedance parameters. Background technique [0002] Transmission line parameters are used in power flow calculation, short-circuit current calculation, relay protection setting and fault analysis of the power system. Accurate acquisition of transmission line parameters is of great significance to ensure the analysis and calculation of power systems. [0003] In actual engineering, there are many phenomena in which new lines are erected in parallel on the same corridor of existing lines to expand the transmission capacity, which makes the electromagnetic environment of transmission lines more and more complex. The positive sequence parameters of the transmission line do not have coupling between different loops, so the new line will not affect the positive sequence parameters of the old lines that have been in operation. However, for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R35/00
CPCG01R35/005
Inventor 张璞张凯舒彬高杨鹤李雪男滕苏郸余潇潇宫一玉左向红鞠力刘兆燕李翔宇刘景延郭思琪
Owner STATE GRID BEIJING ELECTRIC POWER