Dynamic protection constant value setting method and device, equipment and storage medium

Abstract

The invention discloses a dynamic protection constant value setting method, device and equipment and a storage medium, and the method comprises the steps: building a heat distribution model in a transformer, and researching temperature rise characteristics of the transformer according to the heat distribution model and a thermal circuit differential equation; and performing temperature field simulation on the transformer, calculating the temperature rise and the average temperature rise of the hottest point of a distribution transformer winding of the transformer, and comparing the temperaturerise and the average temperature rise with the temperature rise and the average temperature rise of the hottest point of the distribution transformer winding of mineral oil. According to the application, the technical problems that an existing low-voltage main switch protection technology cannot effectively play the role of the high-overload-capacity distribution transformer when the rated current value is set, and the high-overload-capacity distribution transformer cannot bear the impact of long-time overload and is damaged if the set current value is too high are solved.

Description

technical field [0001] The present application relates to the technical field of transformer overload current protection, in particular to a method for dynamically setting a protection value, a device and a storage medium. Background technique [0002] In recent years, electricity consumption in northern rural areas has seasonal characteristics. For example, during the Spring Festival, the electricity load surges, causing a large number of power distribution to be overloaded for a short time. In urban villages in southern cities, distribution transformers will also experience continuous Overload phenomenon, and the current distribution transformer protection device is over-current protection, although the load current and trip time can be adjusted, but still can not meet the continuous overload requirements of the distribution transformer, in severe cases, it will cause the fuse to blow, and even cause the transformer to fail. Insulation failure. [0003] The existing low-v...

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Problems solved by technology

[0004] This application provides a dynamic setting method, device and storage medium for the protection setting value, which solves the problem that the existing low-voltage main switch protection technology cannot effectively play the role of the distribution transformer with high overload capacity when it is set to the rated current value. If the value is too high, the distribution transformer with high overload capacity will not be able to withstand the impact of long-term overload and cause technical problems of damage.

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