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DC Power Production, Delivery and Utilization

Figures 12 and 13.Two examples of direct current PV energy approaches

PV supplemented resistive heating loads

Conventional AC power input (utility)

PV array (up to 10 kW)

Rectifier

DC level converter

DC bus (250-600 V)

Resistive heating element

Drive

DC level

rectifier

unit

converter

PV supplemented adjustable speed motor drives

Conventional AC power input (utility)

DC bus (250–600 V)

Adjustable speed drive inverter

PV array

Overall ASD unit

Motor

In these examples, a heating application and a variable speed motor application, PV power supplements incoming AC power.

June 2006

An EPRI White Paper

Page 19

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