ComEd time-of-use pilot will test importance of price certainty

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Michael Leaf

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Nov 28, 2018, 7:31:11 PM11/28/18
to Com*Ed RRTP User Group
ComEd is proposing a pilot program that has 3 fixed price tiers (super peak, peak, off peak).

Summary of the pilot from the Utility Dive website:
  • Commonwealth Edison has filed with Illinois regulators a proposed four-year time-of-use (TOU) pilot program, seeking to compare its current real-time offering to one that gives customers a better sense of the cost of their energy supply.
  • The utility has offered its Real-Time Pricing Program for a decade, but has heard from customers that the lack of price certainty is a barrier to signing up.
  • The TOU pilot was developed in collaboration with the Environmental Defense Fund (EDF) and the Citizens Utility Board (CUB). The groups say they expect the new rate program to roll out in January 2020.




Ryan Ziolko

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Mar 7, 2019, 7:42:33 PM3/7/19
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I had heard rumors this was coming.  It's a baby step to putting everyone on a TOU plan.  Lots of interesting actions in the energy markets recently (like the PJM capacity market changes).

Rex Irby

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Mar 8, 2019, 8:52:21 AM3/8/19
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Interesting Concept - implementation for the next 4 years appears terrible!   Capacity is based on NLP price - times yada yada then times the customer's 
  Capacity Obligation, as defined in the Definitions part of General Terms and Conditions, established by the retail customer for the monthly billing period 

This is unclear to me how this is calculated since its not in this Rider 

3 periods - no distinguishing weekdays versus weekends - Problem
1.  EV charging time off peak midnight - 6:am
2.  Peak 6:am till 3:00 then Super peak 4 hours then back to Peak from 7pm till midnight.
3.  Super peak 4 hours 3-7pm

Basically its a RTP customer just like us except:
1.  Hybrid capacity charge?
2.  Take each customers RTP calc and and make the Super Peak period 10% more expensive and make the charge at night 10% less.  This appears to be off final charges and not kWh consumption.  Appears if your were diligent and spent only .4 kWk/peak - 4 hours @ say RTP of 10 cents then that comes to $0.16.  Multiply that by 10% you get 1.6 cents savings for charging that night.  

If you were average during the Super peak and burned 2.8 kWh for 4 hours @ same 10 cents then  = $1.12 and then 10% moved to off peak charging  = 11.2 cents savings.

This pilot Rider has no insurance protection that a fixed 3 block rate would have - its just Wanky RTP - one step past RTP on the risk reward path?

Sounds ???? confusing - To me RTP would be the way to go - Sounds like this is going to be a tough sell?

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