Hybrid dual power switching circuit and dual power system

Abstract

The invention discloses a hybrid dual power switching circuit and a dual power system. The hybrid dual power switching circuit includes isolation switches, a first breaker, a first solid-state transfer switch, a second breaker, and a second solid-state transfer switch, wherein the isolation switches are arranged on power supply lines of a main power supply and a standby power supply, and are usedfor isolating the main power supply from the output of the standby power supply so as to enable the main power supply and the standby power supply to supply power at different time; the first breakeris arranged on a first power supply line of the main power supply; the first solid-state transfer switch is arranged on a second power supply line of the main power supply; the second breaker is arranged on a first power supply line of the standby power supply; the second solid-state transfer switch is arranged on a second power supply line of the standby power supply; and the first breaker and the second breaker are the same breaker, and / or the first solid-state transfer switch and the second solid-state transfer switch are the same solid-state transfer switch. Therefore, the hybrid dual power switching circuit can realize power supply switching between the main power supply and the standby power supply on the basis of reducing the total application number of the breakers and the solid-state transfer switches, thus simplifying the circuit structure and reducing the cost.

Description

technical field [0001] The invention relates to the field of dual power conversion, in particular to a hybrid dual power conversion circuit and a dual power system. Background technique [0002] At present, in places such as hospitals, airports and firefighting, two power supplies (main power supply and backup power supply) are usually equipped for important power loads. The purpose is to use the backup power supply to supply power in the event of a main power failure to ensure uninterrupted power supply. In the prior art, the main power supply and the backup power supply use a dual power supply switch to realize power supply switching. When the main power supply fails, the dual power transfer switch can switch the power supply line from the main power supply to the backup power supply to ensure the continuous and reliable operation of the electrical equipment. However, the existing dual power supply switch uses two solid-state switches and two circuit breakers, which has a...

AI Technical Summary

Problems solved by technology

However, the existing dual power transfer switch uses 2 solid-state transfer switches and 2 circuit breakers, the structure is complex and the cost is high

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