METHOD OF CONTROL OVER UNINTERRUPTED POWER SOURCE REDUNDANT MODULES Russian patent published in 2018 - IPC H02J9/04 H02M7/493 G05F1/613 

FIELD: electrical equipment.

SUBSTANCE: invention relates to the field of electrical equipment and can be used in the alternating current uninterruptible power supply devices and systems, as well as in the automation and measuring equipment devices. Method of the uninterruptible power supply redundant modules control consists in the fact that modules are divided into master ones, with inverters – voltage amplifiers and slave ones, with inverters – current amplifiers. Output currents of the parallel connected inverters of modules with voltage pulse width modulation and subsequent filtration are summed at the total load. To the first master module inverter input a control signal is supplied equal to the difference of the sinusoidal shape voltage command signal and the voltage negative feedback signal, and the master module output current signal is used to control the slave modules inverters in which negative current feedback is used. Master module provides output voltage qualitative characteristics and can have low power. Slave modules provide the output current main part and, therefore, power. In the control method, several connected in parallel master modules are used. Master modules inverters output currents are summed up and divided by the number of operating master modules. Resulting quotient is compared with the each master module inverter own output current, and the difference is summed with the master signal and supplied to the input, as a result, the master modules output currents are equalized.

EFFECT: technical result is an increase in the reliability, scalability of the uninterruptible power system and load characteristics.

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