As stated, the SD, RES and HL strategies differ for control variables and required measurements at the valve, as reported in Table 1.

Table 1

Summary of control variables and measurements required for each strategy

StrategyControl variableMeasurement
SD Valve shutter degree Not required
RES Valve shutter degree Flow at the valve
HL Head loss at the valve Differential pressure at the valve
StrategyControl variableMeasurement
SD Valve shutter degree Not required
RES Valve shutter degree Flow at the valve
HL Head loss at the valve Differential pressure at the valve

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