DSS C-API Pascal Docs

Unit Load

Description
Uses
Classes, Interfaces, Objects and Records
Functions and Procedures
Types
Constants
Variables

Description

 

Uses

Overview

Classes, Interfaces, Objects and Records

Name Description
Class TLoad  
Class TLoadObj  

Types

TLoadModel = (...);
TLoadStatus = (...);
TLoadConnection = TGeneralConnection;
TLoadSpec = (...);
TLoadProp = (...);

Description

Types

TLoadModel = (...);

keep enums as int32 values

Values
  • ConstPQ = 1: INVALID = 0,
  • ConstZ = 2: Constant kVA (P,Q always in same ratio)
  • Motor = 3: Constant impedance
  • CVR = 4: Constant P, Quadratic Q (Mostly motor)
  • ConstI = 5: Linear P, Quadratic Q (Mixed motor/resistive Use this for CVR studies
  • ConstPFixedQ = 6: Constant |I|
  • ConstPFixedX = 7: Constant P (Variable); Q is fixed value (not variable)
  • ZIPV = 8: Constant P (Variable); Q is fixed Z (not variable)
TLoadStatus = (...);

ZIPV (3 real power coefficients, 3 reactive, Vcutoff)

Values
  • Variable = 0
  • Fixed
  • Exempt
TLoadConnection = TGeneralConnection;
 
TLoadSpec = (...);
 
Values
  • kW_PF = 0
  • kW_kvar = 1
  • kVA_PF = 2
  • ConnectedkVA_PF = 3
  • kWh_PF = 4
TLoadProp = (...);
 
Values
  • INVALID = 0
  • phases = 1
  • bus1 = 2
  • kV = 3
  • kW = 4
  • pf = 5
  • model = 6
  • yearly = 7
  • daily = 8
  • duty = 9
  • growth = 10
  • conn = 11
  • kvar = 12
  • Rneut = 13
  • Xneut = 14: IF entered -, assume open
  • status = 15
  • cls = 16: fixed or variable
  • Vminpu = 17: integer
  • Vmaxpu = 18: Min pu voltage for which model applies
  • Vminnorm = 19: Max pu voltage for which model applies
  • Vminemerg = 20: Min pu voltage normal load
  • xfkVA = 21: Min pu voltage emergency rating
  • allocationfactor = 22: Service transformer rated kVA
  • kVA = 23: allocation factor for xfkVA
  • pctmean = 24: specify load in kVA and PF
  • pctstddev = 25: per cent default mean
  • CVRwatts = 26: per cent default standard deviation
  • CVRvars = 27: Percent watts reduction per 1% reduction in voltage from nominal
  • kwh = 28: Percent vars reduction per 1% reduction in voltage from nominal
  • kwhdays = 29: kwh billing
  • Cfactor = 30: kwh billing period (24-hr days)
  • CVRcurve = 31: multiplier from kWh avg to peak kW
  • NumCust = 32: name of curve to use for yearly CVR simulations
  • ZIPV = 33: Number of customers, this load
  • pctSeriesRL = 34: array of 7 coefficients
  • RelWeight = 35: pct of Load that is series R-L
  • Vlowpu = 36: Weighting factor for reliability
  • puXharm = 37: Below this value resort to constant Z model = Yeq
  • XRharm = 38: pu Reactance for Harmonics, if specifies
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