Documentation Home Page ◇ HYPERSIM Home Page
Pour la documentation en FRANÇAIS, utilisez l'outil de traduction de votre navigateur Chrome, Edge ou Safari. Voir un exemple.
PQ Load with Load-Flow
Description
The PQ load with load-flow is a three-phase element consisting of equivalent RLC branches where each branch can have an equivalent resistance (P → R), an equivalent inductance (Q > 0 → L) and an equivalent capacitor (Q < 0 → C) connected in parallel or in series (only when Q > 0). There are two types of RLC shunt connections: RLC parallel and RL series. The element is both a load-flow and a non-load-flow device. This model is similar to the one found in EMTP-RV.
Mask and Parameters
General Parameters:
RLC connection type | |
RLC Parallel | RL parallel (when Q>0) or RC parallel (when Q<0) |
RL Series | RL series only |
Base voltage | Base value for PU conversion (kV) |
Base frequency | Base value for PU conversion (Hz) |
Load Parameters:
Active power (P) | 3-phase active power (MW) |
Reactive power (Q) | 3-phase reactive power (Mvar) |
Np | Active power coefficient for load-flow constraints calculation |
Nq | Reactive power coefficient for load-flow constraints calculation |
Ports, Inputs, Outputs and Signals Available for Monitoring
Ports
Net_1: Network connection (supports only 3-phase connections)
Inputs
None
Outputs
None
Sensors
I(a,b,c): Current for each phase (A)
Description of the Load Model
Load Model
The PQ load with load-flow consists of the parallel 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:
The resistance value in the parallel combination is given by:
When Q>0, the inductance value in the parallel combination becomes:
When Q<0, the capacitance value in the parallel combination becomes:
Load-Flow Model
The load-flow model equations of this load are given by:
The Pconstraint and Qconstraint power become the load-flow constraints for the model. The Vload-flow is the actual voltage magnitude solution on the load bus. The P and Q are the values specified in the mask as “Active Power (P)” and “Reactive Power (Q)”, respectively.