Error-Initial state vector "X0" must be a real vector of length 86

When i am running simulink program i am getting error as Initial state vector "X0" must be a real vector of length 86

The simulink is power_wind_dfig.mdl

when i run this the program runs ,but i tried to connect another wind turbine across B575.i get that error

pleasae help

[Azzi Abdelmalek]

which block causes error ?

[kash]

This is my mdl

http://www.sendspace.com/file/0j7mk3

cannot determine which block causes error

[Sachin Ganjare]

Can you upload initialization file as well, as the model is not simulating due to some undefined parameters

[Walter Roberson]

Please use better tags for this question; see http://www.mathworks.co.uk/matlabcentral/answers/43073-a-guide-to-tags

Answer 1

[Azzi Abdelmalek]

In the home page of Matlab, on the top-middle there is a "current folder" by default it's

F:\Old\bck\Program Files\MATLAB\R2011b\bin

change it to a new folder

[kash]

ok thanks Azzi

[kash]

Azzi is it posible to get graphs like shown in simulink

http://imgur.com/JtdXc

[Azzi Abdelmalek]

It's possible, if you know what you want

[kash]

yes Azzi i need graphs like that ,please tell hoe to perform

[Azzi Abdelmalek]

kash, If the question you've previously posted was answered accept it or no, and repost another question.

Answer 2

[Sachin Ganjare]

Use below command & check the results:

newoptions = simset (oldoptions, 'SaveFormat', 'StructureWithTime');

[kash]

I get error as Undefined function or variable 'oldoptions'.

[Sachin Ganjare]

Simply goto Simulation->Configuration Parameters->Data Import/Export Options->Save Options->Format & change setting from 'Array' to 'Structure With Time'

[kash]

I get same error

Initial state vector "X0" must be a real vector of length 135

[Sachin Ganjare]

Refer below link, it might help:

http://www.mathworks.nl/matlabcentral/answers/10541

[Sachin Ganjare]

Also try this:

Go to your Simulink model, select menu "Simulation">"Configuration Parameters ...", click "Data Import/Export" at the left column, look at the right, do you see "Initial State" is checked and there is a "X0" there?

If Yes, that is try to use the value in the variable "X0" to set the initial state. Sounds like the value for "X0" in the workspace does not meet the criteria.

To make it work, set X0=zeros(1,70). This is just trying to see if it can pass this error stage. To set the proper value, you have to look into your own model or document.

[kash]

again same error

Initial state vector "X0" must be a real vector of length 13

Initial state was xinitial ,i changed it,again same error ,please help

[Sachin Ganjare]

Can you upload initialization file as well, as the model is not simulating due to some undefined parameters.

[kash]

Sachin can u please tell me ehat is initialization file,i have pnly that mdl file

[Sachin Ganjare]

Some parameters used in your model are undefined, this error may be related to that.

[kash]

Sachin please can you tell how to modify those

Answer 3

[Azzi Abdelmalek]

right click on your model, then on model properties , callbacks, init fcn you will find the initialization command

load power_wind_dfig_xinit  % this file contains a variable named  xInitial (1x85)

If you have changed the model I think you must change xInitial

[kash]

azzi i typed in command window but it is not opening .......am using 2010a,and i did not get any error ,but not openenig,plz help

[kash]

can u please tell what must he xinitial value

[Azzi Abdelmalek]

kash, have you found the command in your model callback? If you don't, from where did you get your simulink model? because it's in matlab folder.

[kash]

Azzi the command is there in specified path,but as u said please tell how to change the xInitial

[Azzi Abdelmalek]

In the callback,replace the command load power_wind_dfig_xinit by

xInitial=   % put your own values

[kash]

Azzi i get same error Initial state vector "X0" must be a real vector of length 135

xInitial= =135 in call back

[Azzi Abdelmalek]

== is not an affectation, also xInitial =135, its size is one

just to don't have an error try

xInitial= zeros(1,135)

but you must know, what should be xInitial in your model

[kash]

Azzi after rectifying that i ge another error

Derivative input 1 of 'powinju1/Wind Turbine Doubly-Fed Induction Generator (Phasor Type)1/Generator & Converters/DC bus model/Integrator' at time 0 is Inf or NaN. Stopping simulation. There may be a singularity in the solution. If not, try reducing the step size (either by reducing the fixed step size or by tightening the error tolerances).

[Azzi Abdelmalek]

kash, I dont know how your model works, I think you should change the xInitial values, I set them to zeros to avoid error message about xInitial, but you have to know what you are doing with this model, and I advise you to make your own model, the one you are trying to use, can just help you to have an idea how to do it.

[kash]

Azzi i neesd the same output power_wind_dfig.mdl,i have added extra source and wind turbine,i need output in three turbines

[Azzi Abdelmalek]

kash, I can't help you with turbine problems, it's not my area.

[kash]

ok Azi thanks for your help a final questio ,is there any block available for PWM current source

[Azzi Abdelmalek]

Sorry, no idea

[kash]

ok in trying to run PV ARRAY program taken frommatlab central

i get error

Your current working folder is: F:\Old\bck\Program Files\MATLAB\R2011b\bin Simulink does not permit you to build programs in the MATLAB installation area. Please change to a working folder that is not in the MATLAB installation area.

please tell how to solve this

[Azzi Abdelmalek]

Just change your working folder to a new folder, for example D:\work

[kash]

Yes Azzi how to change where i have to type these command