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Setting calculation method for direct current system protection setting value

A DC system, setting calculation technology, applied in the direction of calculation, emergency protection circuit device, emergency protection data processing device, etc., can solve the problems of laborious work efficiency, time-consuming fixed value setting, etc., to ensure rationality, good promotion value, reduce The effect of protecting the hidden danger of refusal or misoperation

Inactive Publication Date: 2015-12-30
XJ ELECTRIC +1
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for setting and calculating the DC system protection setting value, so as to solve the problems of time-consuming, laborious and low work efficiency in the setting of the DC system protection setting value in the traditional DC power transmission field

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  • Setting calculation method for direct current system protection setting value
  • Setting calculation method for direct current system protection setting value
  • Setting calculation method for direct current system protection setting value

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Embodiment Construction

[0019] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0020] In the traditional DC transmission field, the fixed value of the DC system protection is fixed in the program first, and then the correctness of the fixed value is verified by the electromagnetic transient simulation software. If the fixed value is unreasonable, the purpose of modifying the fixed value is achieved by modifying the program, which is time-consuming, laborious, and low in work efficiency. Therefore, the present invention provides a DC system protection setting calculation method in the field of DC transmission, such as image 3 As shown, first establish the mathematical model of the converter station through the engineering configuration, set the parameters of the equipment components and the short-circuit point, the system automatically performs a large number of electromagnetic transient simulation tests, and calculates...

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Abstract

The invention relates to a setting calculation method for a direct current system protection setting value. The setting calculation method for the direct current system protection setting value comprises the steps that firstly, partition and classification are performed on direct current system protection to form a corresponding protection principle template base; secondly, a mathematical model of a convertor station is built through engineering configuration, an equipment element parameter and a short dot are set, and a short-circuit current is determined through an electromagnetic transient simulation experiment; finally, the short-circuit current obtained through calculation serves as a process parameter, and protection setting calculation is performed on the process parameter and the equipment element parameter according to the protection setting principle. According to the setting calculation method for the direct current system protection setting value, the electromagnetic transient simulation experiment is performed in advance, and the protection setting calculation process is abstracted and cured to form an automatic setting calculation scheme which is standard in procedure and format; accordingly, setting value calculation of direct current system protection in a direct current transmission project does not rely on electromagnetic transient simulation software any more, the reasonability of the protection setting value is guaranteed, potential hazards of operation refusal or misoperation of protection are reduced, and the good popularization value for improving the power system automation level is achieved.

Description

technical field [0001] The invention relates to a setting calculation method for a DC system protection fixed value, which belongs to the technical field of electric system relay protection and computer software. Background technique [0002] The setting of the DC system protection setting in the field of DC transmission needs to consider many factors such as fault characteristics, equipment tolerance, setting coordination, and coordination with the DC control system. Due to the strong nonlinear characteristics of the DC transmission system, the fault limit values ​​required for the calculation of the DC system protection settings, such as the maximum and minimum short-circuit currents, are difficult to obtain conveniently through analytical fault analysis algorithms. Therefore, the calculation of the fixed value of the DC system protection in the existing DC transmission project generally depends on the electromagnetic transient simulation software, and the simulation calcu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
CPCG06F30/367H02H1/0092H02H3/006H02H7/268G06F30/20G06F2111/10
Inventor 张红跃张振华陈海龙陈干杰张坤徐玉洁杜延辉路振宇牛志雷安友彬赵艳茹黄绍辉
Owner XJ ELECTRIC
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