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18 Smart Grid Conference 2014 (SGC’14) - Grid Renovation Workshop

Example: Distribution Grid Volt/Var Effect on

Available DR

• Use Case

– Feeder Voltage: 13.8 kV

– Feeder Base Load: 9 MW with Unity Power Factor: 3 MW Constant

Impedance (Z); 3 MW Constant Current (I); 3 MW Constant Power (P)

– Participating DR: 900 kW with 0.8 Lag Power Factor

– Remaining load after deployment of DR: 8,100 kW with Lead Power

Factor

– Feeder Voltage Increase due to Lead Power Factor: 1.5%

– Increase in base load due to voltage increase: 135 kW

– Net Demand Reduction: 900-135 = 765 kW

Voltage

Increase (%)

Z Load I Load P Load Total

1.5% 3% 1.5% 0%

90 kW 45 kW - 135 KW

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 51 52

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