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PQ Load, 1-Ph series
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PQ Load, 1-Ph series
Mask and Parameters
General Parameters:
V0 | Base value for PU conversion (kV) |
F0 | Base value for PU conversion (Hz) |
Load Parameters:
Base active power (P0) | 1-phase active power under nominal conditions (kW) |
Base reactive power (Q0) | 1-phase reactive power under nominal conditions (kW) |
Np | Active power - Voltage variation coefficient |
Nq | Reactive power - Voltage variation coefficient |
Kpf | Active power - Frequency variation coefficient |
Kqf | Reactive power - Frequency variation coefficient |
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:
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- The resistance value in the RL series combination is given by:
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- When Q<0, the capacitance value becomes:
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Model Equations
The model equations of this load are given by:
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where:
: Active power under nominal conditions
: Reactive power under nominal conditions
: Nominal voltage
: Frequency deviation from the nominal value F0 in pu.