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A Calibration Method of Series Compensation MOV Non-electricity Protection Fixed Value

A technology of non-electricity protection and calculation method, which is applied in the direction of measuring electric variables, measuring electricity, measuring devices, etc., and can solve the problems that MOV non-electricity protection and fixed value verification cannot be performed

Active Publication Date: 2021-02-12
BEIJING RUICHUANG XINZHI TECH CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

The invention provides a fixed value calculation method for series compensation MOV non-electricity protection, and uses the mathematical analysis formula of the fitting curve to describe the typical value of MOV voltage / current (U / I), which solves the problem in the on-site series compensation protection test. The problem that the fixed value verification of MOV non-electricity protection cannot be performed

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  • A Calibration Method of Series Compensation MOV Non-electricity Protection Fixed Value
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  • A Calibration Method of Series Compensation MOV Non-electricity Protection Fixed Value

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Embodiment Construction

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0055] like figure 1 As shown, the embodiment of the present invention provides a fixed value calculation method for series compensation MOV non-electricity protection, including:

[0056] Step 100, taking the logarithm of U and I in the MOV voltage / current (U / I) typical value table with base 10 respectively to obtain a new typical value curve table. That is, the MOV voltage / current (U / I) typical value Table 1 is converted into Table 2 through formula (3).

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Abstract

The invention discloses a fixed value calculation method for series compensation MOV non-electricity protection. The method includes: using a cubic polynomial y=a 0 +a 1 x+a 2 x 2 +a 3 x 3 The curve fits the typical value of the MOV voltage / current, and the value of the excitation value that should be applied during the calibration of the series compensation MOV non-electricity protection is calculated by combining the fitting curve with the fixed value of the series compensation protection energy or temperature. The invention solves the problem that the fixed value verification of MOV non-electricity protection cannot be performed in the on-site serial compensation protection test.

Description

technical field [0001] The invention relates to the technical field of power transmission, in particular to a calibration method for non-electricity protection fixed value of series-compensated MOV (Metal Oxide Varistor, metal oxide varistor). Background technique [0002] At present, the UHV AC transmission system is one of the main means to realize large-capacity long-distance power transmission in my country. The use of transmission line series capacitor compensation technology can effectively shorten the electrical distance between the beginning and end of the transmission line and increase the power transmission capacity of the line, which is of great significance for the construction of the global energy Internet and the promotion of social and economic development. [0003] The State Grid Corporation of China built my country's first UHV series compensation project: 1000kV Jindongnan (Changzhi)-Nanyang-Jingmen, which realized the successful application of series compe...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G01R31/00G06Q50/06G06F119/08
CPCG01R31/00G06Q50/06
Inventor 邹学灿
Owner BEIJING RUICHUANG XINZHI TECH CO LTD