Motor

Create Function

pandapower.create.create_motor(net, bus, pn_mech_mw, cos_phi, efficiency_percent=100.0, loading_percent=100.0, name=None, lrc_pu=nan, scaling=1.0, vn_kv=nan, rx=nan, index=None, in_service=True, cos_phi_n=nan, efficiency_n_percent=nan, **kwargs)

Adds a motor to the network.

Parameters:

  • created (**net** - The net within this motor should be)

  • **bus** (int)

  • **pn_mech_mw** (float)

  • **cos_phi** (float, nan)

  • **name** (string, None)

  • **efficiency_percent** (float, 100)

  • **loading_percent** (float, 100)

  • **scaling** (float, 1.0)

  • **cos_phi_n** (float, nan)

  • **efficiency_n_percent** (float, 100)

  • **lrc_pu** (float, nan)

  • **rx** (float, nan)

  • **vn_kv** (float, NaN)

  • **in_service** (bool, True)

  • **index** (int, None)

  • net (pandapowerNet)

  • bus (int | integer)

  • pn_mech_mw (float)

  • cos_phi (float)

  • efficiency_percent (float)

  • loading_percent (float)

  • name (str | None)

  • lrc_pu (float)

  • scaling (float)

  • vn_kv (float)

  • rx (float)

  • index (int | integer | None)

  • in_service (bool)

  • cos_phi_n (float)

  • efficiency_n_percent (float)

Returns:

index (int) - The unique ID of the created motor

Return type:

int | integer

Example

create_motor(net, 1, pn_mech_mw=0.120, cos_ph=0.9, vn_kv=0.6, efficiency_percent=90, loading_percent=40, lrc_pu=6.0)

Input Parameters

net.motor

Parameter

Datatype

Value Range

Explanation

name

string

name of the motor

bus *

integer

index of connected bus

pn_mech_mw*

float

\(\geq 0\)

Mechanical rated power of the motor [MW]

cos_phi *

float

\(0...1\)

cosine phi at current operating point

cos_phi_n *

float

\(0...1\)

cosine phi at rated power of the motor for short-circuit calculation

efficiency_percent *

float

\(0..100\)

Efficiency in percent at current operating point[%]

efficiency_n_percent *

float

\(0..100\)

Efficiency in percent at rated power for short-circuit calculation [%]

loading_percent *

float

\(0..100\)

Efficiency in percent at rated power for short-circuit calculation [%] [%]

scaling *

float

\(\geq 0\)

scaling factor for active and reactive power

lrc_pu *

float

\(\geq 0\)

locked rotor current in relation to the rated motor current [pu]

rx *

float

\(\geq 0\)

R/X ratio of the motor for short-circuit calculation.

vn_kv *

float

\(\geq 0\)

Rated voltage of the motor for short-circuit calculation

in_service*

boolean

True / False

specifies if the motor is in service.

*necessary for executing a power flow calculation.

Electric Model

\begin{align*} P_{motor, n} =& pn\_mech\_mw / (efficiency\_percent/100) \\ P_{motor} =& P_{motor, n} * (loading\_percent / 100) * scaling \\ S_{motor} =& P_{motor} / cos\_phi \\ Q_{motor} =& \sqrt{S_{motor}^2 - P_{motor}^2} \end{align*}

Result Parameters

net.res_motor

Parameter

Datatype

Explanation

p_mw

float

resulting active power demand [MW]

q_mvar

float

resulting reactive power demand [MVar]

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