Storage

Note

Since storage power values are given in the consumer system, positive power models charging and negative power models discharging.

Create Function

Input Parameters

net.storage

Parameter	Datatype	Value Range	Explanation
name	string		Name of the storage unit
bus*	integer		Index of connected bus
p_mw*	float	\(\leq\) 0	Momentary real power of the storage (positive for charging, negative for discharging)
q_mvar*	float		Reactive power of the storage [MVar]
sn_mva	float	\(>\) 0	Nominal power ot the storage [MVA]
scaling*	float	\(\geq\) 0	Scaling factor for the active and reactive power
max_e_mwh	float		The maximum energy content of the storage (maximum charge level)
min_e_mwh	float		The minimum energy content of the storage (minimum charge level)
max_p_mw**	float		Maximum active power
min_p_mw**	float		Minimum active power
soc_percent	float	0 \(\leq\) soc_percent \(\leq\) 100	The state of charge of the storage
max_q_mvar**	float		Maximum reactive power [MVar]
min_q_mvar**	float		Minimum reactive power [MVar]
controllable**	bool		States if sgen is controllable or not, sgen will not be used as a flexibilty if it is not controllable
in_service*	boolean	True / False	Specifies if the generator is in service

*necessary for executing a power flow calculation
**optimal power flow parameter

Electric Model

Storages are modelled as PQ-buses in the power flow calculation:

The PQ-Values are calculated from the parameter table values as:

\begin{align*} P_{storage} &= p\_mw \cdot scaling \\ Q_{storage} &= q\_mvar \cdot scaling \\ \end{align*}

Note

The apparent power value sn_mva, state of charge soc and storage capacity max_e_mwh are provided as additional information for usage in controller or other applications based on panadapower. It is not considered in the power flow!

Result Parameters

net.res_storage

Parameter	Datatype	Explanation
p_mw	float	resulting active power after scaling [MW]
q_mvar	float	resulting reactive power after scaling [MVar]

The power values in the net.res_storage table are equivalent to \(P_{storage}\) and \(Q_{storage}\).