Mask and Parameters

General Parameters:

Load Parameters:

Ports, Inputs, Outputs and Signals Available for Monitoring

Ports

• Net_1: Network connection (supports only 1-phase connections)
• Net_3: Network connection (supports only 1-phase connections)

Inputs

• None

Outputs

• None

Sensors

• F: Estimated current at the point of connection
• Lout: Effective inductance or Capacitance
• Rout: Effective resistance
• Vrms: Estimated RMS voltage at the point of connection

Description of the Load Model

Load Model

The PQ load consists of the series combination of equivalent R, L and C branches and the series combination of equivalent R and L branches. The following rules are applied:

• If P=0 and Q=0, the element becomes disconnected in all solution methods.
• The RL series inductance equivalent is calculated using:

• The resistance value in the RL series combination is given by:

• When Q<0, the capacitance value becomes:

Model Equations

The model equations of this load are given by:

where:

: Active power under nominal conditions

: Reactive power under nominal conditions

: Nominal voltage

: Frequency deviation from the nominal value F0 in pu.

: Active power-Frequency coefficient

: Reactive power-Frequency coefficient

: Active power-Voltage coefficient

: Reactive power-Voltage coefficient

: RMS voltage measured between connection nodes Net_T1 and Net_T3

By adjusting Np and Nq equal to 0, 1, or 2, the load can be set to work as a constant power, constant current, or constant impedance, respectively.