State Estimation Variance Settings

The variance settings represent an additional option of the state estimation module which allows setting the measurement variances to given predefined values. To successfully execute the routine, exact values of electrical quantities must be known and given in the input variables.

Although the syntax is given in a certain order, for methodological reasons, only DATA must appear as the first input argument, and the order of other inputs is arbitrary, as well as their appearance.

Syntax:

leeloo(..., VARIANCE)

Description:

leeloo(..., VARIANCE) defines measurement values according to a given predefined variances

Examples:

runse('ieee14_20', 'nonlinear', 'legRedundancy', 4, 'legUnique', 1e-4, 'main');
runse('ieee14_20', 'nonlinear', 'warm', 'bad', 'legRedundancy', 'legRandom', 'main');
runse('ieee14_20', 'pmu', 'bad', 'pmuOptimal', 'pmuType', 'estimate');
runse('ieee14_20', 'dc', 'legDevice', [10 0 4 0], 'legUnique', 'estimate', 'save');

Input Arguments:

VARIANCE

Command	Description
'pmuUnique',value	applies fixed-value variance x over all phasor measurements value = x, default setting: 1e-12
'pmuRandom',value	selects variances uniformly at random within limits x and y applied over all phasor measurements value = [x y], default setting: [1e-12 1e-10]
'pmuType',value	predefines variances over a given subset of angles and magnitudes measured by PMUs: current magnitude x, current angle y, voltage magnitude z and voltage angle v value = [x y z v], default setting: [1e-10 1e-12 1e-10 1e-12]
'legUnique',value	applies fixed-value variance x over all legacy measurements value = x, default setting: value = 1e-8
'legRandom',value	selects variances uniformly at random within limits x and y applied over all legacy measurements value = [x y], default setting: [1e-9 1e-8]
'legType',value	predefines variances over a given subset of legacy measurements: active flow x, reactive flow y, current magnitude z, active injection v, reactive injection p and voltage magnitude q value = [x y z v p q], default setting: [1e-6 1e-8 1e-8 1e-6 1e-8 1e-8]