Measurement

Create Function

pandapower.create_measurement(net, meas_type, element_type, value, std_dev, element, side=None, check_existing=False, index=None, name=None, **kwargs)

Creates a measurement, which is used by the estimation module. Possible types of measurements are: v, p, q, i, va, ia

INPUT:

meas_type (string) - Type of measurement. “v”, “p”, “q”, “i”, “va”, “ia” are possible

element_type (string) - Clarifies which element is measured. “bus”, “line”, “trafo”, and “trafo3w” are possible

value (float) - Measurement value. Units are “MW” for P, “MVar” for Q, “p.u.” for V, “kA” for I. Bus power measurement is in load reference system, which is consistent to the rest of pandapower.

std_dev (float) - Standard deviation in the same unit as the measurement

element (int) - Index of the measured element (either bus index, line index, trafo index, trafo3w index)

side (int, string, default: None) - Only used for measured lines or transformers. Side defines at which end of the branch the measurement is gathered. For lines this may be “from”, “to” to denote the side with the from_bus or to_bus. It can also the be index of the from_bus or to_bus. For transformers, it can be “hv”, “mv” or “lv” or the corresponding bus index, respectively

OPTIONAL:

check_existing (bool, default: None) - Check for and replace existing measurements for this bus, type and element_type. Set it to false for performance improvements which can cause unsafe behavior

index (int, default: None) - Index of the measurement in the measurement table. Should not exist already.

name (str, default: None) - Name of measurement

OUTPUT:

(int) Index of measurement

EXAMPLES:

2 MW load measurement with 0.05 MW standard deviation on bus 0: create_measurement(net, “p”, “bus”, 0, 2., 0.05.)

4.5 MVar line measurement with 0.1 MVar standard deviation on the “to_bus” side of line 2 create_measurement(net, “q”, “line”, 2, 4.5, 0.1, “to”)

Input Parameters

net.measurement

Parameter	Datatype	Value Range	Explanation
type	string	“p” “q” “i” “v”	Defines what physical quantity is measured
element_type	string	“bus” “line” “transformer”	Defines which element type is equipped with the measurement
value	float		Measurement value
std_dev	float		Standard deviation (same unit as measurement)
bus	int	must be in net.bus.index	Defines the bus at which the measurement is placed. For line or transformer measurement it defines the side at which the measurement is placed (from_bus or to_bus).
element	int	must be in net.line.index or net.trafo.index	If the element_type is “line” or “transformer”, element is the index of the relevant element. For “bus” measurements it is None (default)
check_existing	bool		Checks if a measurement of the type already exists and overwrites it. If set to False, the measurement may be added twice (unsafe behaviour), but the performance increases
index	int		Defines a specific index for the new measurement (if possible)