How to adjust steps of shunt devices in time series simulation

[mchirsa5]

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I'm running the time series simulation for a distribution system. In the simulation, I will have hundreds of transformers and shunt capacitors. I want to adjust the tap of the transformers and the steps of the c-bank based on the voltage magnitudes of the connected bus. Currently, I can change the taps of transformers in the network using "trafocontroller". However, I don't know how to adjust the steps of the c-bank based on the voltage magnitude of the connected bus. Could you advise if there is any function to do that kind of adjustment?

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[vogt31337]

Can't you just set the step of the shunt? If this is the case, you could write a shunt controller similar to the trafo controller and just add it. Maybe write one and send a Pull Request.

[pawellytaev]

Hi @mchirsa5, we just merged two new controllers that might solve your issue: A DiscreteShuntController https://github.com/e2nIEE/pandapower/blob/develop/pandapower/control/controller/shunt_control.py for changing the discrete steps of the shunt depending on voltage settings (similar to DiscreteTapControl for trafos)
and BinarySearchControl https://github.com/e2nIEE/pandapower/blob/develop/pandapower/control/controller/station_control.py that you can use if you're relaxing the steps of the shunts

you can find uses for both here: https://github.com/e2nIEE/pandapower/blob/develop/pandapower/test/control/test_shunt_control.py

[HafizRiaz]

I ma trying to add capacitor to my existing code that is currently dealing with continuous devices like inverter and SVC, using DDPG algo, i am wondering if there is a discrete controller for shunt capacitor that dont allow taps, just switches On or OFF when voltage falls below lower limit e.g 0.95 p.u, plz help me regarding this

[HafizRiaz]

Hi @mchirsa5, we just merged two new controllers that might solve your issue: A DiscreteShuntController https://github.com/e2nIEE/pandapower/blob/develop/pandapower/control/controller/shunt_control.py for changing the discrete steps of the shunt depending on voltage settings (similar to DiscreteTapControl for trafos) and BinarySearchControl https://github.com/e2nIEE/pandapower/blob/develop/pandapower/control/controller/station_control.py that you can use if you're relaxing the steps of the shunts

you can find uses for both here: https://github.com/e2nIEE/pandapower/blob/develop/pandapower/test/control/test_shunt_control.py

i try to use these shunt controllers, raise LoadflowNotConverged("Power Flow {0} did not converge after "
pandapower.powerflow.LoadflowNotConverged: Power Flow bfsw did not converge after 100 iterations!

[pawellytaev]

if you set up the shunt with max_step=1, and use the discrete shunt controller, it should be able to turn it on or off. otherwise you can always build your own controller with this functionality, here's a tutorial that explains it: https://github.com/e2nIEE/pandapower/blob/develop/tutorials/building_a_controller.ipynb

for the not-converging power flow, we'll need more information on the grid. does it work with newton raphson? does the DC power flow calculate? maybe you can start with it. Since it's a separate topic from this issue here, please open another issue or discussion

[HafizRiaz]

Thanks for your response. Actually I am trying to incorporate capacitor in an ieee 33 bus environment that uses DDPG algorithm for continuous devices like Inverter based PVs and SVC. When I just add a capacitor with create_shunt command it gives the same error even without using the discrete controller introduced by you. Would you please give some hint to deal with such a scenario Get Outlook for Android<https://aka.ms/AAb9ysg>

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________________________________ From: pawellytaev ***@***.***> Sent: Tuesday, September 10, 2024 5:15:16 PM To: e2nIEE/pandapower ***@***.***> Cc: Mehboob Riaz ***@***.***>; Comment ***@***.***> Subject: Re: [e2nIEE/pandapower] How to adjust steps of shunt devices in time series simulation (Issue #2288) if you set up the shunt with max_step=1, and use the discrete shunt controller, it should be able to turn it on or off. otherwise you can always build your own controller with this functionality, here's a tutorial that explains it: https://github.com/e2nIEE/pandapower/blob/develop/tutorials/building_a_controller.ipynb for the not-converging power flow, we'll need more information on the grid. does it work with newton raphson? does the DC power flow calculate? maybe you can start with it. Since it's a separate topic from this issue here, please open another issue or discussion — Reply to this email directly, view it on GitHub<#2288 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/BAK6YLZBKCM54YRHW6DJ6SLZV3PFJAVCNFSM6AAAAABIDARVVCVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDGNBQGUZTGMZQHA>. You are receiving this because you commented.Message ID: ***@***.***>