Method and system for assessing relay protection dynamic characteristics of high-voltage direct-current power transmission line

A technology of DC transmission lines and dynamic characteristics, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problem that the reliability of line protection configuration schemes cannot be effectively evaluated, and the reliability of protection is difficult to obtain substantial improvement and other issues to achieve good practical benefits, improve work efficiency and accuracy

Inactive Publication Date: 2013-04-03
CSG EHV POWER TRANSMISSION +1
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Problems solved by technology

[0010] The purpose of the present invention is to provide a method and system for evaluating the dynamic characteristics of relay protection of HVDC transmission lines. The reliability of the protection itself and the configuration scheme of the protection cannot be effectively evaluated, and it is difficult to substantially improve the reliability of the protection

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  • Method and system for assessing relay protection dynamic characteristics of high-voltage direct-current power transmission line
  • Method and system for assessing relay protection dynamic characteristics of high-voltage direct-current power transmission line
  • Method and system for assessing relay protection dynamic characteristics of high-voltage direct-current power transmission line

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Embodiment Construction

[0044] In order to make the object, technical solution and advantages of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0045] In order to have a reliable theoretical basis for the setting and calculation of DC line relay protection under different DC transmission systems, to clarify the calculation principles and related influencing factors of each setting value in the relay protection of DC transmission lines, and to be able to analyze the existing DC Effectively evaluate the reliability and sensitivity of the fixed value and protection configuration of transmission line protection, and develop a set of evaluation methods and systems for the dynamic characteristics of relay protection of HVDC transmission lines. The development of this evaluation method and system provides a unified and reliable theoretical basis for the calculation of protection setting...

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Abstract

The invention discloses a method and system for assessing relay protection dynamic characteristics of a high-voltage direct-current power transmission line. The method comprises the following steps: simulating computed result data; extracting basic electric quantity data related with direct-current line protection; extracting protection required characteristic quantity through a constructed characteristic quantity function module; forming a dynamic characteristic curve of the direct-current line protection characteristic quantity; computing computational boundary conditions for direct-current power transmission line protection; and carrying out direct-current line protection assessments to obtain assessment values, wherein the assessments include constant value assessment of direct-current line protection, global assessment of direct-current power transmission line protection, assessment of specific state protection performance and assessment of influence of related factors on protection performance. Due to the adoption of the method and system, the working efficiency and the accuracy of protection performance assessment and research can be greatly improved, and good practical benefits are achieved.

Description

technical field [0001] The invention relates to the field of high-voltage power transmission, in particular to a method and system for evaluating dynamic characteristics of relay protection of high-voltage direct current transmission lines. Background technique [0002] HVDC transmission technology is an effective means to realize large-capacity and long-distance transmission of electric energy. The DC transmission line is the channel for power transmission of the DC transmission system, and its stable and reliable operation plays a vital role in the stable operation of the entire DC transmission system. The increase in the length of DC transmission lines also greatly increases the probability of line failures. The data from the power system operation shows that nearly 50% of the faults in the HVDC transmission system are related to the DC transmission lines, which has great impact on the stability and safety of the system operation. had a huge impact. Therefore, extremely...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 贺智蔡泽祥王朝硕韩昆仑徐敏
Owner CSG EHV POWER TRANSMISSION
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