Demand Response and the California Information Display Pilot 2005 AEIC Load Research Conference Myrtle Beach, South Carolina July 11, 2005 Mark S. Martinez,

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Presentation transcript:

Demand Response and the California Information Display Pilot 2005 AEIC Load Research Conference Myrtle Beach, South Carolina July 11, 2005 Mark S. Martinez, Manager, Program Development, SCE Craig Williamson, Research Director, EPRI Solutions

2 Copyright © 2005 EPRI Solutions, Inc. All rights reserved. Background In 2003, California embarked on Statewide Pricing Pilot (SPP), a study to determine customer responsiveness to dynamic pricing rates Time of Use (two part) Critical Peak Pricing (Fixed) Critical Peal Pricing (Variable) $12M study designed to develop inputs into Advanced Metering Infrastructure business cases from three IOUs in 2005

3 Copyright © 2005 EPRI Solutions, Inc. All rights reserved. Smart Thermostat – Enabling Technology Due to the short-term notification of the CPP-V Super Peak, customers were offered “smart thermostats” as basic enabling technology These thermostats automatically adjusted customer’s HVAC temperature during Super Peak period Residential customers were also offered water heater and pool pump controls Some commercial customers were offered small energy management systems

4 Copyright © 2005 EPRI Solutions, Inc. All rights reserved. SCE and SDG&E Smart Thermostat

5 Copyright © 2005 EPRI Solutions, Inc. All rights reserved. Potential Enhanced CPP Treatments SPP specific web site (what to do when you want to “Smart Shift and Save”) More timely inbound usage feedback Post event notice ( and letter) Monthly comparison bill or statement SPP “Report Card” or activity report Additional event or price notification In-home usage or energy display Additional enabling technologies

6 Copyright © 2005 EPRI Solutions, Inc. All rights reserved. Research Purpose – Information Display Pilot (IDP) Does more timely feedback on household energy use increase average level of peak energy savings? Dynamic rates may be difficult to understand, and existing “price signals” may not generate response to consequences in a timely manner – what would? Awareness, understanding, and behavior modification for SPP are based on materials provided, and bill feedback – could we do better? What would be incremental increase in energy savings and load reduction from enhanced deployment of information and technology?

7 Copyright © 2005 EPRI Solutions, Inc. All rights reserved. Direct Feedback Methodology “Push” approach that is scheduled (mailers) or polled on demand (observe) – Options: Provide more frequent information on consequences of customer behavior with energy usage – “Who left all the lights on?” Make price signal and events more obvious to consumer – “in their face” Provide direct usage information on a near real- time basis

8 Copyright © 2005 EPRI Solutions, Inc. All rights reserved. Newsletter – focus group feedback Groups generally favor IDP newsletter, but this alone might not change behavior during peak periods. Some skeptical of information in IDP treatments: not representative of home/lifestyle. Some had mixed responses about whether they want information on/with bill, in hard copy, or by . Most with internet access want info via internet, but were mixed regarding how wished to be alerted about information.

9 Copyright © 2005 EPRI Solutions, Inc. All rights reserved. IDP Impact Assessment Goals Assess the load impact of providing enhanced information treatments to customers, over and above the impact of enabling technology and the rate/price Control for other factors, including –Customer size (high-low consumption) –Day-specific conditions –Treatment installation date Groups include residential and commercial customers on the CPP-V rate (2003 Track A SPP sample) Challenge – only 62 total customers available

10 Copyright © 2005 EPRI Solutions, Inc. All rights reserved. Impact Assessment Process Include both a treatment and a control group in the analysis, both on CPP-V Collect interval load data during pre-treatment period for both groups, begin treatments, then collect post- treatment data Use Energy Orb installation date as start of treatment Newsletters started at about the same time Energy Orbs installed from 7/28/04 through 8/31/04 Pre-treatment and post-treatment periods are different for different customers

11 Copyright © 2005 EPRI Solutions, Inc. All rights reserved. Impact Assessment Methodology Difference of Differences approach Corrects for changes over time (pre and post) and recognizes differences between treatment and control groups First calculate average for each customer for pre and post period (customer-specific) Then average all customers in each sample cell for control and treatment group First difference: Treatment – control for each hour in both the pre-treatment and post-treatment periods Second difference: (difference in the post-treatment period) – (difference in the pre-treatment period) Calculate weighted average of cell differences, using weights based on the number of treatment customers in each cell

12 Copyright © 2005 EPRI Solutions, Inc. All rights reserved. Pre and Post Differences (after averaging )

13 Copyright © 2005 EPRI Solutions, Inc. All rights reserved IDP Sample Design IDP Treatment Group (enhanced) 33 residential customers on CPP-V 29 commercial customers on CPP-V IDP Control Group (standard) 100 residential customers on CPP-V 138 commercial customers on CPP-V Residential customers located in SDG&E areas, and C/I customers located in SCE territory IDP Control Group was the 2004 Track A

14 Copyright © 2005 EPRI Solutions, Inc. All rights reserved IDP Results - Residential Difference of differences approach, with CPP-V as common rate in treatment and control groups, and adjusting for pre and post treatments periods for both groups

15 Copyright © 2005 EPRI Solutions, Inc. All rights reserved. IDP Residential – average for 2-hour event days Difference of differences approach, using “relative time” to treat different days consistently

16 Copyright © 2005 EPRI Solutions, Inc. All rights reserved. IDP Residential – individual 2-hour event days Difference of differences approach, using “relative time” to treat days with different start times consistently

17 Copyright © 2005 EPRI Solutions, Inc. All rights reserved. IDP Residential – average for 2-hour event day with 90% confidence intervals Difference of differences approach, using “relative time” to treat days with different start times consistently

18 Copyright © 2005 EPRI Solutions, Inc. All rights reserved. IDP Residential – average for 5-hour event days Difference of differences approach, using “relative time” to treat days with different start times consistently

19 Copyright © 2005 EPRI Solutions, Inc. All rights reserved. IDP Residential – individual 5-hour event days Difference of differences approach, using “relative time” to treat days with different start times consistently

20 Copyright © 2005 EPRI Solutions, Inc. All rights reserved. IDP Residential – average for 5-hour event day with 90% confidence intervals Difference of differences approach, using “relative time” to treat days with different start times consistently

21 Copyright © 2005 EPRI Solutions, Inc. All rights reserved IDP Results - Commercial Difference of differences approach, with CPP-V as common rate in treatment and control groups, and adjusting for pre and post treatments periods for both groups

22 Copyright © 2005 EPRI Solutions, Inc. All rights reserved. IDP Commercial – average for 2-hour event days Difference of differences approach, using “relative time” to treat days with different start times consistently

23 Copyright © 2005 EPRI Solutions, Inc. All rights reserved. IDP Commercial – individual 2-hour event days Difference of differences approach, using “relative time” to treat days with different start times consistently

24 Copyright © 2005 EPRI Solutions, Inc. All rights reserved. IDP Commercial – average for 5-hour event days Difference of differences approach, using “relative time” to treat days with different start times consistently

25 Copyright © 2005 EPRI Solutions, Inc. All rights reserved. IDP Commercial – individual 5-hour event days Difference of differences approach, using “relative time” to treat days with different start times consistently

26 Copyright © 2005 EPRI Solutions, Inc. All rights reserved. Impact Analysis Conclusions Residential customers show an impact during Super Peak, and also during the 4 hour warning period Commercial customers, while they are very positive about the program, do not show a consistent impact. But something appears to be happening None of the results are statistically significant Limit of small sample sizes Variability of the commercial customer types Customer feedback indicates that treatments are somewhat responsible for the apparent impacts, either alone or combined Individual analysis of each customer or subgroups would be beneficial in “teasing out” specific behavioral effects

27 Copyright © 2005 EPRI Solutions, Inc. All rights reserved. Recommendations for 2005 Sample sizes are obviously too small – recommend increasing to improve significance Residential customers may be responding to both the Energy Orb and the newsletter – recommend a bifurcation of treatments or focus on one treatment Commercial customers are too variable – need to increase sample size and also focus on one treatment Difference of differences approach can be repeated more effectively if Super Peak events and treatment start times are properly coordinated

28 Copyright © 2005 EPRI Solutions, Inc. All rights reserved. IDP for 2005 Proposed research objectives for 2005 include -Continue to evaluate incremental effect of enhanced treatments on peak load impacts -Augment commercial segment with CPP-V customers from SPP (non-Track A) and offer visual and informational treatments -Augment residential segment with CPP-F from SPP to evaluate incremental load impacts of monthly information treatments for residential CPP Continuation of current sample and augmenting residential sample with CPP-F customers receiving newsletter treatments have been approved.