Difficulty adding storage to DG based inverter

[HafizRiaz]

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Issue

Dear Author, i am working on Distribution system voltage control with DRL (machine learning algo) using Inverter based PV and SVC, which gives the expected results. however, when i try to replace SVC with Storage system , it gives error. I know that way , storage system is defined in pndapower is quite different from SVC which is created the same command of "pp.create_sgen" for Inverter based PV. The error is as uner. Plz help me resolving the issue . Although dimension are same

Traceback (most recent call last): File "G:\Mehboob\Single-Period\DDPG_OSTC_store.py", line 694, in agent.train(num_frames, plotting_interval=400000) File "G:\Mehboob\Single-Period\DDPG_OSTC_store.py", line 400, in train next_state, reward, done, violation, violation_M, violation_N,voltage_M, voltage_N, grid_loss, new_state = self.step_model(action) File "G:\Mehboob\Single-Period\DDPG_OSTC_store.py", line 275, in step_model next_state, reward, done, violation, violation_M, violation_N, voltage_M, voltage_N, grid_loss, new_state = self.env.step_model(action) File "G:\Mehboob\Single-Period\Env2.py", line 218, in step_model self.model.sgen.q_mvar = action # clipped action values are assigned to Q power attribute of sgen File "C:\Users\sa\anaconda3\envs\myenv\lib\site-packages\pandas\core\generic.py", line 5931, in setattr self[name] = value File "C:\Users\sa\anaconda3\envs\myenv\lib\site-packages\pandas\core\frame.py", line 3980, in setitem self._set_item(key, value) File "C:\Users\sa\anaconda3\envs\myenv\lib\site-packages\pandas\core\frame.py", line 4174, in _set_item value = self._sanitize_column(value) File "C:\Users\sa\anaconda3\envs\myenv\lib\site-packages\pandas\core\frame.py", line 4915, in _sanitize_column com.require_length_match(value, self.index) File "C:\Users\sa\anaconda3\envs\myenv\lib\site-packages\pandas\core\common.py", line 571, in require_length_match raise ValueError( ValueError: Length of values (4) does not match length of index (3)

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[pawellytaev]

Hi, can you provide a minimal example code so that we can replicate the issue? To me, this looks more like an issue in assigning the agent's actions (len(action)=4) to the sgens (len(net.sgen)=3) and less like a specific pandapower issue

[HafizRiaz]

Thank you for the response. here is the example code. Actually the code goes well when i add SVC to Inveter based PV static generator. However when i try to replace SVC with storage it gives error where i am adding its reactive power so that it may be assigned to action values of DRL agent for volt/var control. I think nature of storage is different from that of SVC. In literature where storage is modeled, just active power and SOC are mentioned but in pandapower modeling , storage creation also has the provision of defining minimum and maximum reactive power which can be used in volt-var control strategy, If you could suggest me some related help points, i will highly appreciate. Stay blessed and healthy. this section (image attached) where we want to clip actions causes error

[pawellytaev]

It still looks to me that your dimenstion of action is different from the number of sgens. In your __init__ I see that you set the action dimenstion to be len(self.id_iber) + len(self.id_store). Then the DRL agent calculates the actions (I assume both for storages and sgens). Then you try to assign this action to only sgens, which throws the error. I propose you work with masked arrays.

Since this is not a specific pandapower issue to me, I'll close this issue, but you can still comment here