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A fault identification method and device for a high-voltage DC voltage divider

A technology of fault identification and high-voltage direct current, which is applied in the direction of fault location and fault detection according to the type of conductor, etc., can solve the problem that the fault voltage divider cannot be automatically identified, and achieve the effect of facilitating fault maintenance

Active Publication Date: 2020-06-16
XJ ELECTRIC +2
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Problems solved by technology

[0003] The purpose of the present invention is to provide a fault identification method and device for a high-voltage DC voltage divider, which is used to solve the problem that the fault voltage divider cannot be automatically identified

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  • A fault identification method and device for a high-voltage DC voltage divider
  • A fault identification method and device for a high-voltage DC voltage divider
  • A fault identification method and device for a high-voltage DC voltage divider

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Embodiment Construction

[0034] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] The invention provides a fault identification method for a high-voltage DC voltage divider, comprising the following steps:

[0036] (1) Obtain the active power of the AC side and the active power of the DC side of the rectifier station / inverter station in the converter station, the DC current of the rectifier station and the inverter station, and the actual power of the single pole of the converter station.

[0037] Specifically, such as figure 1 As shown in , the steps to obtain the active power on the AC side of the rectifier station / inverter station in the converter station are as follows:

[0038] a) Perform α / β conversion on the three-phase AC voltage and current of the rectifier station / inverter station in the converter stat...

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Abstract

The invention relates to a fault identification method and device of a high-voltage direct-current voltage divider. The method comprises steps of acquiring alternating-current side active power and direct-current side active power of a rectification station / inversion station in a converter station, direct current of the rectification station and the inversion station and single-electrode actual power of the converter station; judging whether the following determination condition is met: the difference value between the alternating-current side active power and direct-current side active powerof the rectification station / inversion station, the difference vale between the direct current of the rectification station and the direct current of the inversion station and the size of the single-electrode actual power of the converter station meet a preset condition; and if the determination condition is met, determining that a direct current voltage divider of the rectification station / inversion station in the converter station fails. According to the invention, the position of the direct current voltage divider can be automatically determined; a fault voltage divider can be rapidly positioned; and it is convenient for an operator to carry out fault maintenance.

Description

technical field [0001] The invention relates to a fault identification method and device for a high-voltage direct current voltage divider, belonging to the technical field of high-voltage direct current transmission fault identification. Background technique [0002] The voltage dividers on the high voltage side of HVDC and UHVDC are respectively arranged in the rectification station and the inverter station. Especially in UHVDC projects, the frequency of voltage divider failures is increasing. When the rectifier station DC voltage U dL When it is lower than the command value issued by the operator, it may be caused by the low measurement value of the voltage divider of the rectification station or the high measurement value of the voltage divider of the inverter station; similarly, when the DC voltage U of the rectification station dL When the value is higher than the command value issued by the operator, it may be caused by the high measurement value of the voltage divid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08
CPCG01R31/086
Inventor 戴国安王胜吴东崛王柏恒
Owner XJ ELECTRIC
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