Plerr and Pline in the REPCA1 Model

[sghqsads]

Dear Andes developers,

I'm seeking insights into the REPCA1 model, particularly regarding the function and significance of setting Plerr (Plerr = Plant_pref - Pline), Plant_pref and Pline. Why do we use ‘Plant_pref - Pline’ in this model instead of using Plant_pref alone? For instance, in PVD1 model, there is no Pline. What exactly does Plerr represent in this context and why do we need to use Pline? Also, is it feasible to set Pline to zero?

Furthermore, if a bus is connected to multiple renewable generators, how should Plant_pref and Pline be set for each renewable generator? Should the Plant_pref for each renewable generator be set as the sum of Plant_pref for all renewable generators?

Thank you!

[cuihantao]

Hello,

Some renewable plants connect to the grid by one single line. These plants accept signals from balancing authorities regarding their power output. That's why they control Plant_ref to Pline.

These REEC_A and REGC_A controlled by REPC_A are supposed to aggregated models that represent a large number of generators.

if a bus is connected to multiple renewable generators, how should Plant_pref and Pline be set for each renewable generator

I guess one single generator won't worry too much about the line power. But if you want to represent a group of individual generators, you can build a control loop that monitors the PCC output power and control it by an algorithm that adjusts the individual setpoints.

You can prototype this by modifying REPC_A to work with two REEC_A.