Obscure state space variables of a synchronous machine (generator) 'State-Spa​ce(1)...St​ate-Space(​12)': What are they exactly? What do they mean?

When I blockwise linearize a synchronous machine (at a steady state operating point) I get 12 obscure state space variables (see below) State-Space(1)...State-Space(2): I am wondering what these things are. Any help would be appreciated.

>> linsys1.StateName
ans =
  25×1 cell array
    'Rotor angle dthetae'
    'fluxes(1)'
    'fluxes(2)'
    'fluxes(3)'
    'fluxes(4)'
    'fluxes(5)'
    'State-Space(1)'
    'State-Space(2)'
    'State-Space(3)'
    'State-Space(4)'
    'State-Space(5)'
    'State-Space(6)'
    'State-Space(7)'
    'State-Space(8)'
    'State-Space(9)'
    'State-Space(10)'
    'State-Space(11)'
    'State-Space(12)'
    'dw_delay'
    'dw_predict'
    'theta'
    'voltages(1)'
    'voltages(2)'
    'voltages(3)'
    'Rotor speed deviation (dw)'

Answer 1

[Sebastian Castro]

If you do this from the Linear Analysis app, you can view the linearization results and highlight the blocks. See, for example, https://www.mathworks.com/help/slcontrol/ug/troubleshooting-linearization.html#bspsmxf-1

If you're doing this all command-line, there is an option to use the full block path for the state names, as shown below.

opts = linearizationOptions('UseFullBlockNameLabels','on');
linsys1 = linearize('modelName',io,opts);
linsys1.StateName

- Sebastian

[SinanB]

Thanks for pointing out the troubleshooting page which enabled me to gain further insight into the state variables.