Micro-grid operating inverter grid-connection and off-grid smooth switching circuit and control method thereof
A technology of smooth switching and control methods, which is applied in the direction of AC network circuits, circuit devices, single-network parallel feeding arrangements, etc., can solve the problems of easy damage, safety and low reliability of inverters, and achieve non-destructive safety, The effect of high reliability and overcoming low reliability
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[0032] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0033] According to the technical solution of the present invention, a grid-connected and off-grid smooth switching circuit and a control method thereof for an inverter operating in a micro-grid are provided. The grid-connected and off-grid smooth switching circuit and control method of the micro-grid running inverter can realize the smooth switching process between grid-connected and off-grid, and will not cause large damage to the micro-grid running inverter Current impact; moreover, the three-phase solid-state relay grid-connected time is very short, only a small radiator is needed, and the main contact of the three-phase AC contactor is continuously connected to ...
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