Rectifier transformer of power system, and overcurrent protection setting method used on rectifier transformer
A rectifier transformer and power system technology, applied in the field of transformers, can solve problems such as poor operation stability of rectifier transformers
Active Publication Date: 2020-08-11
PANGANG GRP XICHANG STEEL & VANADIUM CO LTD
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Problems solved by technology
[0014] In view of this, the first purpose of the present invention is to provide a rectifier transformer for a power system, which can effectively solve the problem of poor operation stability of current rectifier transformers, and the second purpose of the present invention is to provide a rectifier transformer Setting Method for Overcurrent Protection of Rectifier Transformer Used in Power System
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[0031] The embodiment of the invention discloses a rectifier transformer of an electric power system to effectively solve the problem of poor operation stability of the current rectifier transformer.
[0032] 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.
[0033] see Figure 1-Figure 2 , figure 1 The current protection setting chart of the rectifier transformer provided by the embodiment of the present invention; figure 2 It is a schematic diagram of the current protection installation of the rectifier transfor...
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The invention discloses a rectifier transformer of a power system. According to the rectifier transformer, an action current constant value of a constant time limit overcurrent protection device is set according to the overload capacity of the rectifier transformer; in an action condition of a low-voltage locking overcurrent protection device, a current constant value is set according to a short-circuit current flowing through a high-voltage side when the two phases of the low-voltage side of the rectifier transformer are short-circuited in a minimum system operation mode, and a voltage constant value is set according to a lowest operation voltage possibly appearing when the low-voltage side of the rectifier transformer is avoided; and the action time of the low-voltage locking overcurrentprotection device is the same as that of the constant time limit overcurrent protection device, and setting is carried out according to the difference higher than lower-level instantaneous protectionby one time level difference. According to the invention, occurrence of overcurrent protection misoperation tripping accidents when the load in an allowable range is heavy can be avoided, and safe and reliable operation of the rectifier transformer can be guaranteed. The invention further discloses a rectifier transformer overcurrent protection setting method for the power system.
Description
technical field [0001] The present invention relates to the technical field of transformers, more specifically, to a rectifier transformer of a power system, and also to an overcurrent protection setting method for a rectifier transformer of a power system. Background technique [0002] According to the safety requirements of the industry, the rectifier transformer should be equipped with the following protections: 1. Current quick-break protection for multi-phase short circuit inside the transformer and its primary line; 2. Definite time overcurrent protection for rectifier group short circuit; 3. Inverse time limit for rectifier group overload Overcurrent protection; 4. Gas protection for internal faults of transformers; 5. Temperature signal device for excessive temperature rise of transformers. [0003] When actually performing protection setting, the rectifier transformer is equipped with protections such as current quick break, definite time overcurrent, overload (send...
Claims
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IPC IPC(8): H02H7/04H02H7/125
CPCH02H7/04H02H7/125H02H7/1257H02H3/006
Inventor 陈晓宏李道胜
Owner PANGANG GRP XICHANG STEEL & VANADIUM CO LTD