| 摘要 |
PROBLEM TO BE SOLVED: To provide a simple, easy-to-control and inexpensive uninterruptible protection system.SOLUTION: A power supply system (10) for supplying a load (18) with electric energy from an electrical network (14) includes at least one power supply module (20). The power supply module includes a DC link (24) to be supplied from the electrical network, and an inverter (26) configured to convert a DC voltage from the DC link into an AC voltage to be supplied to the load. The power supply system includes an electric energy storage (30) configured to be charged by the DC link and to supply the DC link with electric energy when the electrical network has a power failure, and the electric energy storage is connected at one input (36) to a neutral point (N) of the power supply module. The power supply module includes a bidirectional buck/boost converter (40) connected to a positive potential (DC+) or negative potential (DC-) of the DC link, to the neutral point and to another input (34) of the electric energy storage. |
