Differential protection method, device, system and computer storage medium for voltage regulating transformer
A technology of differential protection device and voltage regulating transformer, which is applied in the field of transformers, can solve the problems of large voltage regulating range, malfunction of differential protection, voltage ratio change, etc., and achieves the effect of improving reliability and avoiding malfunction.
Active Publication Date: 2020-06-05
NR ELECTRIC CO LTD +1
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Problems solved by technology
However, due to the large voltage regulation range of large voltage regulating transformers, the ratio of voltages on each side changes greatly after voltage regulation, and the differential protection method for small transformers is no longer suitable for large voltage regulating transformers.
At present, there have been researches to connect the gear position information of the voltage regulating transformer gear transmitter to the protection device of the voltage regulating transformer to realize the differential protection of the voltage regulating transformer. However, due to the second-level transmission speed of the gear position information and the microcomputer protection There is a large difference between the processing speeds of the stages, which will lead to a decrease in the reliability of the differential protection during the voltage regulation process of the voltage regulating transformer, for example, it is easy to cause the differential protection to malfunction
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[0053] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0054] see figure 1 , is a differential protection method for a voltage regulating transformer provided in an embodiment of the present invention, which can be applied to a differential protection device for a voltage regulating transformer. The method includes:
[0055] S101: Obtain a gear adjustment command sent by a voltage regulation controller to the voltage regulation transformer;
[0056] The voltage regulating controller sends the gear adjustment instruction to the voltage regulating transformer to send the gear adjustment instruction to the voltage regulating transformer gear transmitter, so that the voltage regulating transformer gear transmitter performs the voltage adjustment operation according to the received gear adjustment instruction, so The gear adjustment command issued by the voltage regulating transformer differe...
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The embodiment of the invention discloses a differential protection method of a voltage regulating transformer. The method comprises steps of acquiring a file calling instruction given out by a voltage regulating controller to the voltage regulating transformer; according to the file calling instruction, determining to switch the differential protection of the voltage regulating transformer from afirst percentage differential protection mode to a second percentage differential protection mode when the voltage regulating transformer is in the voltage regulating state; and carrying out differential protection on the voltage regulating transformer according to the second percentage differential protection mode. The embodiment of the invention also discloses a differential protection device and system of the voltage regulating transformer, and a computer storage medium.
Description
technical field [0001] The invention relates to the field of transformers, in particular to a method, device, system and computer storage medium for differential protection of voltage regulating transformers. Background technique [0002] Large voltage regulating transformer is a special transformer that provides power for electrical equipment with large input voltage amplitude changes. It is widely used in various types of factories and mines, such as salt bath furnace transformers and electric arc furnace transformers used in the steel industry. Due to the small voltage regulation range of small power transformers, the differential protection of small transformers can use fixed voltage settings to calculate the equivalent rated current of each side. However, due to the large voltage regulation range of large voltage regulating transformers, the ratio of voltages on each side changes greatly after voltage regulation, and the differential protection method for small transfor...
Claims
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IPC IPC(8): H02H7/045
CPCH02H7/045
Inventor 王栎涛侯炜陈俊王淑超石勇倪群辉王晨曾先锋
Owner NR ELECTRIC CO LTD