Plugs and socket-outlets for low-voltage DC bi-directional power transmission equipment

Abstract

The invention discloses a plug and socket for low-voltage DC bidirectional power transmission equipment. In the plug, the positive contact of the plug is connected to the positive cable of the low-voltage DC bidirectional power transmission equipment, and the negative contact of the plug is connected to the negative cable of the equipment. Connection, the grounding contact of the plug is connected to the shell of the device, the length L31 of the positive contact of the plug exposed in the plug shell is less than the length L32 of the negative contact of the plug exposed in the plug shell, and L32 is smaller than the length L32 of the negative contact of the plug in the shell of the plug The length L33 exposed outside the body, the plug includes inductors, diodes and capacitors, the inductor is used to suppress the inrush current when the plug is inserted into the socket, the capacitor is used to suppress the arc when the plug is pulled out of the socket, and the diode is used to eliminate the inductance of the plug when it is pulled out of the socket The effect on the ability to suppress the arc and eliminate the effect of inductance on the power response rate when the equipment is feeding power to the power supply. The DC appliance plug provides safe and sensitive bi-directional transfer of DC power.

Description

technical field [0001] The invention belongs to the field of electrical interface, and in particular relates to a plug and a socket used for low-voltage DC bidirectional power transmission equipment. Background technique [0002] With the large-scale access of new energy to the power system, the advantages of distributed power generation and flexible loads in terms of cost and flexibility are gradually emerging, and the low-voltage DC power distribution system can be connected to distributed power sources and loads in a more friendly manner. Therefore, the construction and development of low-voltage DC power distribution system to meet my country's demand for energy conservation, emission reduction and comprehensive energy utilization is of great significance in promoting the access of renewable energy and the intelligentization of traditional power grids. [0003] A conventional DC plug for 110V to 400V low-voltage direct current similar to an AC plug has an in-rush current...

AI Technical Summary

Problems solved by technology

[0003] Conventional DC plugs for 110V to 400V low-voltage DC similar to AC plugs have in-rush current when plugged into the socket and arcing when the plug is pulled out, causing safety problems

However, the improved DC plug that directly uses series inductance and shunt capacitance not only has limitations in balancing inrush current and suppressing arcs, but also has limitations in the power response required by the grid to feed equipment.

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