1. Efficient Data Format for CLM
MVWG meeting, San Diego
March 2016

2. CMPLDW today
130+ parameters, represents over 2/3 the data in the WECC dyd file…

3. Where does the data come from?
Climate Zones + Feeder Types = LID
A residential load on the northwest coast woud have a different composition than a commerical load in the Desert southwest
Sometimes WECC has referred to a Climate Zone + Feeder type combo as just a “climate zone”, but that is really a misnomer because the feeder types in the green box don’t have anything to do with a climate zone at all.
i.e. “NWC_RES”

4. CMPLDW today
“Long ID” (LID) is assigned to each load in a power flow case
Load model data tool generates dynamic data based on LID+season+ hour

5. Proposed Efficient Data Format
Define “load descriptor” objects in DYD file
The “load descriptor” in the dyd file must match LID assigned to the load in the power flow
All loads that have a particular LID (i.e. “NWC_RES”) will be assigned the same set of CMPLDW parameters
These parameters will only be listed once: as part of the load descriptor declaration
A particular load descriptor = LID + season + hour
Similar to “CMPLDWX” model proposed by Bill Price at our June 2017 meeting

6. Proposed Efficient Data Format

7. Blanket CMPLDW Data Record -Area

8. Blanket CMPLDW - Zone

9. Hierarchy Bus-Level Load Descriptor (linked to LID) Owner Zone Area
Cmpldw – (new declaration of cmpldw, not the full version)
Motorw
Any other load model
Load Descriptor (linked to LID)
This is the new “standard model” – every load SHOULD have a LID associated with it.
Owner
Zone
Area
Initialized (ZIP) Model

10. Pros and Cons of Approach
A lot of redundant data would be eliminated
Only 60 full cmpldw declarations instead of 10,000
Make clear to user the purpose of LID’s
Easily to do sensitivity analysis for particular LID
Cons
Still significant amount of redundant data

11. Load Descriptors
In WECC, there will be a unique load descriptor for a given LID, season, and hour
A heavy winter 0700h “NWC_RES” load descriptor would be different from a heavy summer 1800h “NWC_RES” load descriptor
In WECC, load descriptors are based on a particular climate zone + feeder type combination (i.e. NWC_RES)
Climate zones could be developed for other regions (outside WECC)
Or could be based on something else entirely
PJM residential load could be designated by a “PJM_RES” load descriptor

12. Possible Future Development
Adding Flexibility to CLM declarations
Allows users to run sensitivity studies more easily
Similar to “_CMPLDX” from Bill Price
Define 8 different types of data groups:
For example you could have distribution data 1 for feeders that use LTCs and dist data 2 for feeders that don’t use LTCs

13. Possible Future Development

14. Possible Future Development

15. Possible Future Development