Equilibrium topology protection and open circuit fault detection device for multi-winding transformer

Abstract

The invention belongs to the field of a transformer, discloses a multi-winding transformer equalization topology protection and open circuit fault detection device and solves a problem of low reliability of short circuit or circuit break detection of a transformer in the prior art. The device includes n short circuit protection and open circuit detection modules, wherein the n short circuit protection and open circuit detection modules include fuses Fn, current transformers CTn, diode rectifier bridges Dn, capacitors Cn, Zener diodes DZn, resistors Rn, optocouplers OPn, optical coupling relaysSSRn, resistors Rsn and controllers. The device is advantaged in that the modular structure is adopted, and short-circuit and open-circuit fault detection of the multi-winding transformer is realized; adopted materials are easy to obtain, and cost is reduced; through modular design, installation and maintenance are made to be more convenient, and the device is suitable for large-scale popularization and application; digital signal extraction of short-circuit and open-circuit faults of the multi-winding transformer is realized, the device is easy to access to modern digital transformer fault detection systems, and efficiency is improved.

Description

technical field [0001] The invention belongs to the field of transformers, in particular to a multi-winding transformer balanced topology protection and open circuit fault detection device. Background technique [0002] Environmental and energy issues have become the focus of attention all over the world, and a variety of new energy technologies have emerged, such as solar power generation, surge power generation, etc. Therefore, the development of energy storage technology has also received great attention. Common energy storage units include supercapacitors, power lithium-ion batteries, etc., which generally have relatively high energy density and are safe and clean to use. At present, they have been widely used in aerospace power supplies, electric vehicles, solar power stations and other fields that require energy storage. For energy storage cells, whether it is a supercapacitor or a power lithium-ion battery, the voltage level of a single energy storage body is usually ...

AI Technical Summary

Problems solved by technology

When any switch tube on the primary side of the transformer is short-circuited, the transformer will be saturated, resulting in excessive current, which will cause the equalization system to fail, and will generate a lot of heat, which will cause a fire in severe cases.

When any switch tube is disconnected, the energy storage unit corresponding to the switch tube will not be able to participate in voltage equalization. During long-term work, the unit may experience undervoltage or overvoltage, which will damage the unit.

Due to the "barrel effect" principle, when the monomer is damaged, the life of the entire energy storage system will be reduced

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