Configure coincident kVa billing determinants

For the IEE rate engine to calculate charges based on coincident kVa, the IEE administrator must configure service point channels and channel sets. The derived channel attached to the rate schedule uses these channels in its calculations.

The bill determinant itself requires no special configuration. However, IEE does not support demand response determinants for coincident kVa calculations.

  1. Configure Required Service Point Channels

    Coincident kVa billing requires the following channels on the service point:

    • Energy (or Power) channel. A service point channel with a unit of kWh or kW. This is the target channel and the "starting place" of the bill determinant calculation. The interval length of the target channel must be the same as or greater than the interval length of the reference kVarh channels.

    • ReactiveEnergy (or ReactivePower) channel. A service point channel with a unit of kVarh or kVar. This is the reference channel.

    • Channel Set. A kVa channel set associating the kWh / kW and kVarh / kVar channels.

    The coincident kVa calculation ignores any additional kWh channels, power factor channels, or kVa channels on the service point. However, multiple delivered or received kVarh channels result in an exception.

    For instructions on configuring service point channels and channel sets, see Application Data.

  2. Create Derived Channel on Rate Schedule

    Add a coincident kVa derived channel to the rate schedule. This derived channel calculates an absolute or net kWh or kW based on the coincident kVa service point channel set.

    The coincident kVa derived channel syntax is:

    COINKVA_NNN(UOM)

    • COINKVA. The IEE universal calculation engine token for the coincident kVa derived channel method.

    • NNN. The formula to use when calculating the kVa determinant. Valid values are ABS (for an absolute) and NET. The formulas used by each option are as follows:

      • Absolute kVa": SquareRoot(kW2 + ABS(kVar Del – kVar Rec)2

      • Net kVa": SquareRoot(kW2 + (kVar Del + kVar Rec)2

    • UOM. The unit of measure of the target channel.

Sample derived channel formulas:

  • COINKVA_ABS(KWH)

    The rate engine prefers a kWh target channel. If there is no kWh channel, the rate engine can use the KW channel. If both kW and kWh channels exist, specify the target channel in this part of the formula. IEE calculates a kW determinant from the target channel and uses the time stamp of the maximum value to locate the intervals in the kVar channel(s).

  • COINKVA_NET(KW)

    The rate engine prefers a kW target channel. If there is no kW channel, the rate engine can use the kWh channel. If both kW and kWh channels exist, specify the target channel in this part of the formula.IEE calculates a kW determinant from the target channel and uses the time stamp of the maximum value to locate the intervals in the kVar channel(s).

  • COINKVA_NET(KW_DEL_REC)

    This formula is the same as COINKVA_NET(KW), but the preferred target channel UOM is KW_DEL_REC. The rate engine will used a KWH_DEL_REC channel if KW_DEL_REC does not exist.

For step-by-step instructions on configuring a derived channel on a rate, see Rate: Derived channels tab.