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Traveling wave protection fixed value setting method for high-voltage direct-current transmission line

A technology for traveling wave protection and power transmission lines, applied to emergency protection circuit devices, electrical components, etc., can solve problems such as refusal to operate, prone to misoperation, and lack of clear and clear formation, so as to improve reliability, accuracy, and The effect of scientific rationality

Active Publication Date: 2015-04-22
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Misoperation and refusal to operate are often prone to occur during project operation
[0005] To sum up, there is no clear and definite setting method for the setting value setting of traveling wave protection of DC transmission, and the reliable operation of protection largely depends on the rationality of the setting value of traveling wave protection. Carry out in-depth research on fixed value setting

Method used

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  • Traveling wave protection fixed value setting method for high-voltage direct-current transmission line
  • Traveling wave protection fixed value setting method for high-voltage direct-current transmission line
  • Traveling wave protection fixed value setting method for high-voltage direct-current transmission line

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Embodiment

[0055] Taking Xiangjiaba-Shanghai ±800kV UHV DC transmission engineering parameters (hereinafter referred to as upward engineering parameters) as a reference, a PSCAD / EMTDC simulation model is built to further introduce the present invention in detail.

[0056] 1) Clarify the function of traveling wave protection and determine the action criterion form of traveling wave protection. According to the form of action criterion, determine two important values ​​of traveling wave protection, namely the pole wave setting value and the ground mode wave setting value.

[0057] 2) Carry out simulation analysis on the factors affecting the fixed value of traveling wave protection, and formulate the simulation experiment conditions according to the simulation analysis results.

[0058] According to the results of the simulation analysis, combined with the operating conditions of the actual project, the simulation experiment conditions formulated in this embodiment are:

[0059] ① Select t...

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Abstract

The invention relates to a traveling wave protection fixed value setting method for a high-voltage direct-current transmission line. The method comprises the following steps that (1) a travelling wave protection function and an operation criterion mode are defined, and a polar wave fixed value and a floor mold wave fixed value are determined according to the operation criterion mode; (2) factors influencing the traveling wave fixed value are analyzed, and various simulation experiment conditions are set; (3) a simulation model is set up, simulation is carried out under two work conditions, all direct-current protection is closed in the simulation process, and polar wave data and floor mold wave data are extracted; (4) the polar wave data are processed, and the key failure information amount is extracted; (5) the polar wave fixed values under the two work conditions are calculated; (6) the minimum value of the floor mold wave variable quantity is extracted from the obtained floor mold wave data, and the floor mold wave fixed value is set by combining actual engineering parameters; (7) the obtained polar valve fixed values and floor mold wave fixed value are substituted into the simulation model, and rationality is verified. The formulating scheme of the simulation experiment conditions is analyzed in detail, the method is high in reliability and close degree to actual engineering, and therefore the method can be widely applied to high-voltage direct-current transmission traveling wave protection fixed value setting.

Description

technical field [0001] The invention relates to the field of high-voltage direct current transmission, in particular to a method for setting a fixed value of traveling wave protection of a high-voltage direct current transmission line based on fault information. Background technique [0002] High-voltage direct current transmission (HVDC) plays an increasingly important role in long-distance and high-power transmission due to its advantages of large transmission power, low line cost, and good control performance. However, due to the long length of DC transmission lines, crossing various complex terrains, and being subjected to variable weather conditions, the most common faults in HVDC transmission systems are line faults. [0003] Traveling wave protection is one of the main line protections of existing HVDC transmission projects. Among them, the traveling wave protection with polar wave and ground mode wave as the action criterion can fully utilize the voltage and current...

Claims

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Application Information

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IPC IPC(8): H02H7/26
Inventor 马玉龙常浩马为民石岩陈东蒲莹张云晓卢亚军
Owner STATE GRID CORP OF CHINA
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