Benefits of demand response programme

Demand response (DR) is a programme in which consumers reduce or shift their electricity use for a period in response to a price signal or a request from the utility, usually at times of peak demand or system stress, and receive lower bills or incentive payments in return.

Types of DR programmes

• Price-based: time-of-use, critical-peak pricing, real-time pricing.
• Incentive-based: direct load control (utility switches ACs, water heaters, pumps), interruptible/curtailable contracts, demand bidding.

 Utility --(price/signal)--> Smart meter --> Consumer
    ^                                          |
    |      reduced/shifted load at peak        |
    +------------------------------------------+

Benefits for consumers

1. Lower bills: using energy at cheaper off-peak rates and earning incentive payments.
2. Control and awareness: smart meters and apps show usage, helping consumers use energy wisely.
3. Better reliability: fewer blackouts and load shedding events.
4. Lower long-term tariffs: utility saves on peaking plants and network expansion, which keeps future tariffs down.
5. Environmental benefit: less use of polluting peaking plants.

Benefits for utility companies

1. Peak reduction: avoids or defers new generation, transmission and distribution capacity.
2. Lower cost of supply: avoids expensive peak purchases and imports; reduces market price spikes.
3. Better asset use: improved load factor and reduced losses.
4. System reliability and security: DR acts as a fast reserve that can be called during contingencies.
5. Renewable integration: demand follows variable solar/wind or hydro output.

How DR helps avoid blackouts

• When generation is short or a line or plant trips, demand above capacity would cause frequency to fall and lead to load shedding or a cascading blackout.
• DR quickly reduces non-essential load (by thousands of consumers at once), restoring balance between supply and demand, so the operator does not need to cut whole feeders.
• It relieves overloaded transformers and lines during peak, preventing equipment failure.

How DR reduces electricity costs

• The most expensive generation (diesel or imported power) runs only at peak; reducing peak demand avoids this cost.
• Lower capital investment in plants used only a few hours per year.
• Consumers who shift load to off-peak pay lower rates and receive incentives.

Example: in Nepal, a ToD tariff that charges industries more at 17:00–23:00 encourages them to run heavy loads at night, reducing evening peak and import of costly power.