Power Flow Run Settings

The power flow settings should be given as input arguments of the function runpf. 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:

runpf(DATA, METHOD);
runpf(DATA, METHOD, LIMIT);
runpf(DATA, METHOD, LIMIT, ATTACH);
runpf(DATA, METHOD, LIMIT, ATTACH, DISPLAY, EXPORT); 

Description:

runpf(DATA, METHOD) computes power flow problem
runpf(DATA, METHOD, LIMIT) sets reactive power and voltage magnitude limits
runpf(DATA, METHOD, LIMIT, ATTACH) sets the maximum number of iterations
runpf(DATA, METHOD, LIMIT, ATTACH, DISPLAY, EXPORT) shows results and exports models

Output:

[result, data] = runpf(...) returns results of the power flow analysis and DATA input

Examples:

runpf('ieee14_20', 'nr', 'main');
runpf('ieee14_20', 'fdnr', 'main');
runpf('ieee14_20', 'gs', 'reactive', 'main');
runpf('ieee14_20', 'dc', 'main', 'branch' 'save'); 

Input Arguments:

DATA

Example	Description
'ieee30_41'	loads the power system data (first input argument in the runpf function)

METHOD

Command	Description
'nr'	runs the AC power flow analysis using Newton-Raphson algorithm
'gs'	runs the AC power flow analysis using Gauss-Seidel algorithm
'dnr'	runs the AC power flow analysis using decoupled Newton-Raphson algorithm
'fdnr'	runs the AC power flow analysis using fast decoupled Newton-Raphson algorithm
'dc'	runs the DC power flow analysis

LIMITS

Command	Description
'reactive'	forces reactive power constraints
'voltage'	forces voltage magnitude constraints

ATTACH

Command	Description
'maxIter',value	specifies the maximum number of iterations x for the AC power flow value = x, default setting: 500

DISPLAY

Command	Description
'main'	shows main bus data display
'flow'	shows power flow data display

EXPORT

Command	Description
'save'	saves data display

Flowchart

The power flow flowchart depicts the algorithm process according to user settings.