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With the widespread application of 6kV to 35kV medium and low voltage switchgear in an electrical distribution system, the number of power supply and distribution equipment damage accidents caused by arc short circuit faults inside the switchgear is increasing. When a short circuit fault occurs inside the medium and low voltage switchgear, the phenomenon of

The converter transformer is used to change AC  in one side into DC, mostly applied in an electrical swtichyard or an electrical substation. During its actual operation, the load current contains a large number of high-order harmonic components, resulting in uneven distribution of its internal losses and local overheating in a certain area. Excessive temperature

With the increasing strength and growth of the power grid network, the requirements for relay protection equipment in the power grid are also increasing, especially the requirement for speed has reached a high level. However, currently, the vast majority of electrical substations do not have busbar differential protection on the low-voltage side. In the event