High-reliability power supply system, method and frequency converter system

Abstract

The invention discloses a high-reliability power supply system, which at least comprises a first power module and a second power module, wherein the first power module and the second power module are connected in parallel to a load input end; and the first power module and the second power module are respectively connected with different power inputs. The invention also discloses a frequency converter system having the power supply system. The invention also discloses a high-reliability power supply method, which comprises the following steps of: at least providing the first power module and the second power module, and connecting in parallel to the load input end; and respectively connecting the different power inputs with the first power module and the second power module, and supplying power to a load. By seamless switching of power hot standby, the high reliability of load power supplying can be obtained, and electrical elements required by cold standby power supply can be saved.

Description

technical field [0001] The invention relates to power supply technology, in particular to a high-reliability power supply system, method and frequency converter system. Background technique [0002] High reliability requires the equipment to be equipped with more than two input power sources to supply power to the equipment. For example, in the existing medium-voltage inverter system, in order to ensure the reliability of the main control power supply, two power sources are required. In this case, there is a 380V The problem of mutual switching power supply between the mains and the 380V power supply provided by the auxiliary winding of the 6kV / 10kV high-voltage transformer. The existing power supply scheme is to adopt the high and low voltage power circuit cold backup mode for the incoming power supply of a single primary power module. The principle is to detect the high and low voltage power sources. The power supply is used to supply power to the primary power module. A...

AI Technical Summary

Problems solved by technology

Among them, the detection relay is connected in parallel to the 380V mains circuit, and the system judges whether the 380V mains circuit is charged, so as to select the source of the main control power supply. There is a time from detection to execution to switching, which is relatively long. In order to ensure that the main control does not lose power, it is necessary to use batteries or capacitors for support, adding multiple electrical components. The above unfavorable factors make switching unstable and costly

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