Fluid transfer and gas compression applications

Variable speed drive Fluid compression machines

Figure 1 - Engine fleet structure (source EDF)

Figure 2 - Structure of French electricity consumption (source EDF)

Figure 3 - Breakdown of electricity consumption (source EDF – CEREN)

Figure 4 - Direct frequency converter

Figure 5 - VSI intermediate circuit frequency converter

Figure 6 - Variant of the VSI intermediate circuit frequency converter operating in all four quadrants

Figure 7 - Impressed current intermediate circuit frequency converter CSI

Figure 8 - Schematic diagram of a half-inverter (CSI type)

Figure 9 - Frequency inverter with impressed current intermediate circuit and LCI load-commutated inverter

Figure 10 - Typical network characteristics

Figure 11 - Pump and network characteristics

Figure 12 - Operation at speeds other than rated

Figure 13 - Evolution of  and  characteristics with rotation speed

Figure 14 - Variable speed applications

Figure 15 - Flow control

Figure 16 - Level control

Figure 17 - Pressure regulation

Figure 18 - Linear network control

Figure 19 - Parabolic network control

Figure 20 - Mounting control type

Figure 21 - H(Q) fan characteristic

Figure 22 - P(Q) characteristics for various means of flow variation