MODULAR UPS AND CONTROL METHODS BASED ON MODULE ALTERNATING OPERATION WITH 2-WAY PARALLEL OPERATION

摘要

The present invention relates to a modular UPS and a control method of a two-way parallel operation method, and more particularly, because of the limitations of the conventional modular UPS configuration method, beyond the limit of capacity increase that can be additionally installed only up to a limited number of modules, the modular type It relates to a modular UPS and a control method of a 2-way parallel operation based on a module alternating operation that can increase operational efficiency through UPS and improve the lifespan of parts. In order to achieve the above object, the present invention, a rectifying unit, an inverter, a UPS module comprising at least any one of a DC-DC converter; I/O device having a switch and connected to commercial input power to supply AC power of constant voltage and constant frequency to the load through the UPS module; The I/O device and the N number of UPS modules are composed of a modular UPS for module alternating operation; a UPS module including, wherein the master control unit measures the total load to determine the minimum number of UPS modules required to supply the load A quantity determination step, an operation command control step of transmitting an operation command communication signal as a bit using parallel communication to control operation/stop of each UPS module according to the determined number of UPS modules, and all UPSs through the operation command control Alternating operation step of periodically changing the communication signal so that the module can be operated alternately; characterized in that it includes.