Operating Principle - ABB HiPerGuard MV UPS User Manual

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3.2 Operating principle

The HiPerGuard MV UPS has two modes of operation: Power Conditioning and Independent mode. In the Power Con-

ditioning mode, the MV UPS supplies continuously regulated voltage, irrespective of utility conditions.

The high-performance power electronic inverters ensure that the output voltage is regulated for combinations of in-

put supply voltage disturbances. In the Independent mode, the MV UPS opens the input circuit breaker to provide all

the load requirements from the energy storage.

3.2.1 Power Conditioning mode

During the Power Conditioning mode, the power converters can control the real and reactive power from the util-

ity to the load, without cycling the energy storage.

At the same time, the HiPerGuard MV UPS is continuously conditioning and filtering any utility disturbances, pro-

viding reactive current support to the critical loads in voltage sag or swell events. The resulting performance is

continuous clean power in accordance with IEC62040-3 VI SS 111. The efficiency is greater than 98% for the load

spectrum from 50% up to rated full load. When operating on the power conditioning mode, the HiPerGuard MV

UPS can supply high fault currents for downstream protection.

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Figure 3.02: HiPer-

Guard MV UPS Power

Conditioning mode

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