Load

See also

Unit Systems and Conventions

Create Function

pandapower.create_load(net, bus, p_kw, q_kvar=0, sn_kva=<Mock name='mock.nan' id='139784447464168'>, name=None, scaling=1.0, index=None, in_service=True, type=None, max_p_kw=<Mock name='mock.nan' id='139784447464168'>, min_p_kw=<Mock name='mock.nan' id='139784447464168'>, max_q_kvar=<Mock name='mock.nan' id='139784447464168'>, min_q_kvar=<Mock name='mock.nan' id='139784447464168'>, controllable=<Mock name='mock.nan' id='139784447464168'>)

Adds one load in table net[“load”].

All loads are modelled in the consumer system, meaning load is positive and generation is negative active power. Please pay attention to the correct signing of the reactive power as well.

INPUT:

net - The net within this load should be created

bus (int) - The bus id to which the load is connected

OPTIONAL:

p_kw (float, default 0) - The real power of the load

q_kvar (float, default 0) - The reactive power of the load

  • postive value -> load
  • negative value -> generation

sn_kva (float, default None) - Nominal power of the load

name (string, default None) - The name for this load

scaling (float, default 1.) - An OPTIONAL scaling factor to be set customly

type (string, None) - type variable to classify the load

index (int, None) - Force the specified index. If None, the next highest available index
is used

in_service (boolean) - True for in_service or False for out of service

OUTPUT:
index (int) - The index of the created element
EXAMPLE:
create_load(net, bus=0, p_kw=10., q_kvar=2.)

Input Parameters

net.load

Parameter Datatype Value Range Explanation
name string   name of the load
bus * integer   index of connected bus
p_kw* float \(\geq\) 0 active power of the load [kW]
q_kvar* float   reactive power of the load [kVar]
sn_kva float \(>\) 0 rated power of the load [kVA]
scaling * float \(\geq\) 0 scaling factor for active and reactive power
in_service* boolean True / False specifies if the load is in service.
controllable** bool   States if load is controllable or not, load will not be used as a flexibilty if it is not controllable

*necessary for executing a power flow calculation.

Note

Loads are not yet respected by the optimal power flow as a flexibility.

Electric Model

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

alternate Text

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

\begin{align*} P_{load} = p\_kw \cdot scaling \\ Q_{load} = q\_kvar \cdot scaling \\ \end{align*}

Note

Loads should always have a positive p_kw value, since all power values are given in the consumer system. If you want to model constant generation, use a Static Generator (sgen element) instead of a negative load.

Note

The apparent power value sn_kva is 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_load

Parameter Datatype Explanation
p_kw float resulting active power demand after scaling [kW]
q_kvar float resulting reactive power demand after scaling [kVar]

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