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EED, GP Junagadh • Virtual Laboratory

Demand Side Management — Virtual Lab

Study of peak clipping, valley filling and load shifting through interactive simulation.

1. DSM Techniques

Peak Clipping

Reduces demand above a selected peak threshold.

L pc ( t ) = min [ L ( t ) , P c ]

Valley Filling

Increases demand during low-load periods.

L vf ( t ) = max [ L ( t ) , P v ]

Load Shifting

Moves a fraction of demand above the peak cutoff into available low-demand periods.

L ls ( t ) = L ( t ) − Δ L ( t ) + Δ L ( t )

2. Interactive Simulation

Peak Demand
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Minimum
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Average
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Energy
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Load Factor
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24-Hour Load Profile

Baseline DSM
Baseline

Load Modification, ΔL(t)

Removed Added
ΔE = 0 MWh

3. Mathematical Calculations

Peak Demand

Maximum demand during the day.

P max = max t { L ( t ) }
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Daily Energy

One-hour sampling interval.

E = Σ t = 0 23 L ( t ) Δ t
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Load Factor

Average demand divided by peak demand.

LF = P avg P max × 100 %
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Peak Reduction

Compared with the original profile.

R = P base − P DSM P base × 100 %
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4. Hourly Simulation Results

Time Baseline (MW) DSM (MW) ΔL (MW) Period

5. Expected Observations

Peak Clipping

Increasing the clipping action reduces the maximum demand and generally improves the load factor.

Valley Filling

Increasing the valley floor raises low-demand periods and increases utilization of available capacity.

Load Shifting

A fraction of demand above the selected peak cutoff is removed and automatically transferred to periods below the selected valley floor. Total daily energy remains unchanged.

6. Laboratory Procedure

  1. Select None — Baseline and note the peak demand, average demand and load factor.
  2. Select Peak Clipping and vary the peak cutoff slider.
  3. Select Valley Filling and vary the valley floor slider.
  4. Select Load Shifting. Adjust the peak cutoff, valley floor and shift fraction.
  5. Observe how load is automatically removed from high-demand periods and transferred to low-demand periods.
  6. Compare the resulting profiles, energy balance, peak reduction and load factor.

Go to simple version