electrical circuit simulator

i want one simulator for electrical and power electronics same as like multisim and proteus on electronics, please help me to fine one

You can use Proteus to simulate some power electronics circuits as well.

You can use PSIM, Simulink, LTSpice, PSpice and some of the offerings by ANSYS.

You can find loads of SPICE simulators that you can use.

Hope this helps.
Tahmid.

I'm happy with PSpice and LTSpice for simulation of complex power electronics systems, e.g. pwm controllers with feedback, active front ends etc. I agree with Tahmid that any cicuit simulation system can be used. There's a Simulink Power Electronics toolbox, but it's rather far from intuitive circuit description in my opinion. For some calculations, e.g. harmonic spectrum and rms current of pwm signals, efficiency, transfer function of controllers, Matlab or Octave (the GNU alternative to Matlab) are quite helpful.

thank's for your replay.........