Coincident Peak and Individual SP Demand

This rule is used to calculate the coincident peak demand for all of the service points on a usage subscription and the demand values for each service point at the coincident peak. The "coincident peak" is the time at which the combined values of multiple service points is the highest (which is not necessarily the peak for each individual service point).

This rule has two main modes: calculating demand for individual service points on a usage subscription (Individual SP Demand), or calculating the coincident peak among all of the service points on a usage subscription (Coincident Peak). The coincident peak calculation can be performed on either all readings, or those designated as "on-peak" or "off-peak" via time of use mapping using the Coincident On-Peak  or Coincident Off-Peak function. See Defining Time of Use Mapping Options for more information about time of use mapping.

Individual SP Demand

The "Individual SP Demand" Calculate Function identifies the peak demand for each service point on a usage subscription.

For example, the table below lists sample interval data for three service points belonging to single usage subscription for a 12 hour calculation period. This rule would identify the highest value (peak) for each service point within the calculation period (indicated in bold).

Date/Time

Service Point 1

Service Point 2

Service Point 3

10/27/2022 12:00 PM

12

11

13

10/27/2022 1:00 PM

10

12

12

10/27/2022 2:00 PM

11

14

14

10/27/2022 3:00 PM

13

13

14

10/27/2022 4:00 PM

14

14

14

10/27/2022 5:00 PM

13

15

12

10/27/2022 6:00 PM

12

13

15

10/27/2022 7:00 PM

11

12

13

10/27/2022 8:00 PM

12

13

12

10/27/2022 9:00 PM

13

14

12

10/27/2022 10:00 PM

12

14

13

10/27/2022 11:00 PM

12

12

12

This rule would return the following values in the usage transaction service quantities list, which represent the peak values for each service point during the calculation period:

Date/Time

Demand

10/27/2022 4:00 PM

14

10/27/2022 5:00 PM

15

10/27/2022 6:00 PM

15
Note: This option should be used for information and reporting purposes only. These values cannot be used for billing purposes.

Coincident Peak / Coincident On-Peak / Coincident Off-Peak 

The "Coincident Peak” (or “Coincident On-Peak” or “Coincident Off-Peak") Calculate Function identifies the coincident peak demand for all of the service points on the usage subscription and the demand values for each service point at the coincident peak. The "coincident peak" is the time at which the combined values of multiple service points is the highest (which is not necessarily the peak for each individual service point). 

The data used in the calculation is based on the specific Calculate Function selected:

  • Coincident Peak: Evaluates all measurements matching the configured unit of measure

  • Coincident On-Peak: Evaluates measurements matching the configured unit of measure that falls with the "on-peak" TOU period defined in the Results section based on a specified TOU Map Template.

  • Coincident Off-Peak: Evaluates measurements matching the configured unit of measure that falls with the "off-peak" TOU period defined in the Results section based on a specified TOU Map Template.

For example, the table below lists sample interval data for three service points belonging to single usage subscription for a 12 hour calculation period. This rule would identify the highest total for all of the service points, as well as the individual values for each service point at the time of the coincident peak within the calculation period (indicated in bold).

Date/Time

Service Point 1

Service Point 2

Service Point 3

Total

10/27/2022 12:00 PM

12

11

13

36

10/27/2022 1:00 PM

10

12

12

34

10/27/2022 2:00 PM

11

14

14

39

10/27/2022 3:00 PM

13

13

14

40

10/27/2022 4:00 PM

14

14

14

42

10/27/2022 5:00 PM

13

15

12

40

10/27/2022 6:00 PM

12

13

15

40

10/27/2022 7:00 PM

11

12

13

36

10/27/2022 8:00 PM

12

13

12

37

10/27/2022 9:00 PM

13

14

12

39

10/27/2022 10:00 PM

12

14

13

39

10/27/2022 11:00 PM

12

12

12

36

This rule would return the following values in the usage transaction service quantities list, which represent the total at the coincident peak and the peak values for each service point at the coincident peak during the calculation period:

Date/Time

Coincident Peak Demand

SP 1 Demand

SP 2 Demand

SP 3 Demand

10/27/2022 4:00 PM

42

14

14

14
Note: Values for individual service points are for information and reporting purposes only, and cannot be used for billing purposes.

Notes and Recommendations

  • When using the "Coincident On Peak" or "Coincident Off Peak" Calculate Function, you must specify a TOU map template in the On Peak Off Peak Schedule drop-down list in the Calculation Details section, and specify the appropriate time of use period (On-Peak or Off-Peak, respectively) in the TOU field in the Results section.

  • A recommended practice is to configure a Service Quantity Identifier (SQI) to uniquely identify coincident peak data and specify it in the SQI field in the Results section.

Note: Additional detail on the logic of this rule can be found in the Detailed Description of the D1-CALDEMAND Algorithm Type.

For help with the meaning of specific configuration fields, refer to the embedded help on the screen when adding or editing the rule.

Business Object

D1-CoincidentPeakSPDemandRule

Example Scenarios

Below are some example scenarios that can be achieved based on configuration of this rule.

Scenario 1: Calculate demand for individual service points (similar to the example above)

  • Interval Data Retrieval Parameters:

    • UOM: Kilowatt-Hour

  • Calculation Details:

    • Calculate Function: Individual SP Demand

  • Results:

    • UOM: Kilowatt

    • TOU:

    • SQI:

    • Common Interval Size: 01:00:00

Scenario 2: Coincident Peak (similar to the example above)

  • Interval Data Retrieval Parameters:

    • UOM: Kilowatt-Hour

  • Calculation Details:

    • Calculate Function: Coincident Peak

  • Results:

    • UOM: Kilowatt

    • TOU:

    • SQI: Coincident Peak

    • Common Interval Size: 01:00:00

Scenario 3: Coincident On-Peak

  • Interval Data Retrieval Parameters:

    • UOM: Kilowatt-Hour

  • Calculation Details:

    • Calculate Function: Coincident On Peak

    •  On Peak Off Peak Schedule: <TOU map template>

  • Results:

    • UOM: Kilowatt

    • TOU: On Peak

    • SQI: Coincident On Peak

    • Common Interval Size: 01:00:00