Matrix is close to singular or badly scaled in SPS

Hi, someone knows how to solve this warning in SimpowerSystem? Warning: Matrix is close to singular or badly scaled. Results may be inaccurate. RCOND = 1.521282e-16. Warning: Matrix is close to singular or badly scaled. Results may be inaccurate. RCOND = 1.521282e-16.

[Francesco Campostrini]

I have the same issue. Did you find a solution finally?

Answer 1

[Rohit Kudva]

Hi Tony,

The reason could be that the model is a very stiff system. If it contains a Universal Bridge snubber, you may want to check the compatibility of the time constant of the network and that of the snubber.

To get the stiffness ratio, use the following command:

 >> sps=power_analyze(gcs,'detailed');  max(eig(sps.A))/min(eig(sps.A))

-Rohit

[Tony Castillo]

Hi Mr Kudva, after apply the first command, can you help me to analize this?

sps=power_analyze(Mec2cea_TODO_7,'detailed')

Ts =

   2.0000e-06

Warning: Matrix is close to singular or badly scaled. Results may be inaccurate. RCOND = 1.521282e-16. > In etass In powersolve In powersysdomain_start In powersysdomain_netlist In powersysdomain Warning: Matrix is close to singular or badly scaled. Results may be inaccurate. RCOND = 1.521282e-16. > In etass In powersolve In powersysdomain_start In powersysdomain_netlist In powersysdomain Error using exist The first input to exist must be a string.

Error in power_analyze_prv

Error in power_analyze (line 39) [varargout{1:nargout}] = power_analyze_prv(varargin{:});