Delaware Energy Efficiency Advisory Council EEAC Meeting May 8, - - PowerPoint PPT Presentation

Delaware

Energy Efficiency Advisory Council

EEAC Meeting May 8, 2019

What is Demand?

Demand (MW) = the rate at which energy is consumed Energy (MWh) = the amount

• f electricity consumed over a

certain time period Example: A 10 W LED bulb needs 10 W from the grid when it’s in

• use. If the bulb is on for 4 hours, it consumes 40 Wh of energy

vs.

What is Demand?

Utilities need distribution capacity to meet the greatest possible demand on the grid during a single hour (peak demand) 10% of the country's electric system capacity is built to meet demand in just 1% of hours during the year Capacity (MW) = the maximum output an electricity generator can physically produce.

This Photo by Unknown Author is licensed under CC

When is Peak Demand in DE?

• Delaware’s greatest demand for

electricity usually occurs during warmer weather air conditioning increases

• The PJM Summer peak period is

defined as June through August nonholiday weekdays from 2pm to 7pm

• PJM’s wholesale peaks and constraints

might not coincide with peak constraints from local utilities

Why is Demand Reduction important?

• Reduces emissions since dirtier fuel

sources come online during peak times

• Balances reliability
• Mitigates price volatility
• Avoids additional investments in energy

generation and peak capacity

• Defers investments in transmission and

distribution infrastructure

Strategies for Reducing Demand

Encourages customers to reduce

• verall demand,

without a specified time period, such as through energy efficiency or certain behavioral programs

Load Following (passive)

Encourages customers to reduce demand at specific times when system reliability is threatened or to help constrain high market prices such as through demand response (DR)

Active

Types of Demand Response

Source: http://www.synapse-energy.com/sites/default/files/Utility-DR-17-010.pdf

Active Demand Management = More Than Traditional DR

• Modern ADM not limited to

traditional DR or load control

• ADM can also mean managing

demand to meet a wider variety of system needs

– Such as load shifting to smooth out load shapes, or maximizing effectiveness of renewables for the grid.

• Can also help manage load associated with

electric vehicles (EVs) and strategic electrification

• Example ADM strategies include battery storage

and thermal storage

How can ADM be used, for which

• bjectives and purposes?

Source: 2025 California Demand Response Potential Study, LBL, March 2017

ADM Service Types Across Timescales and Objectives to Meet Grid Needs

End Uses and Enabling Technologies

Source: http://ma-eeac.org/wordpress/wp-content/uploads/2025-California-DR-Potential-Study-Presentation-1.pdf