ATS design using PIC16F877A [schematic and code]

Hi... I am working at an ATS project (automatic transfer switch) and this program and schematic I used in protesu ISIS kinda gives me some error.

the ATS have 2 input sources (350v peak each) and 1 output which is gonna be one of them.

now the main problem is that it shorts out the 2 sources!

the control program seems fine as I put some indication LEDs and tested it.

Also, it have a AD736 True RMS-to-DC converter which have 1v peak input and outputs a 1v max dc voltage that equals to the rms of the signal.

I tested this IC in proteus and seemed fine.

I will post the schematic and attach the isis project file and MikroC program.

the program is made to activate the source if the ADC value above 117 as I remember.. I used voltage division to achieve needed signals.

this is the schematic:




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I hope that you try it and point out what's causing the short circuit (btw, my laptop is old and so simulation sometimes fail).

one important thing: in real-life should i connect a ground to an AC voltage source? I don't think so but simulation can't be done without it.

looking forward to your help.

Are your experiencing short circuit only in proteus?

jayanth.devarayanadurga said:

Are your experiencing short circuit only in proteus?

Click to expand...

Yes, because I didn't try it in real-life yet.

And, this short circuit effect is made only when I connect PIC microcontroller.

In my code I made it trigger the triac drivers... if I trigger the triac drivers manually, no sh-circuit occurs.

by short circuit I mean I sine-wave that it's peak is between that of the 2 sources or so... I'm not even sure it's short circuit but no other description.

and proteus gives me errors like excessive CPU load and transient GMIN time... so, I don't know how to debug the circuit freely!

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by looking at my schematic, do you see any error? especially Triac and it's drivers when connected to the sources... and the 2 sources... etc...

Is there any reason this circuit will never work?

by looking at my program, do u suggest something?

What is the value of AC sources used? You have connected both AC ground and DC ground to same point.

jayanth.devarayanadurga said:

What is the value of AC sources used? You have connected both AC ground and DC ground to same point.

Click to expand...

2 of them supposed to be 230v rms / 50Hz AC. one is input from solar/generator which is the default (not important here) and the other is the grid.

I put the simulation file and the schematic.

here we have 2 neutral right? these shouldn't be connected to ground but for simulation in proteus to work, I connected them to ground.

do you suggest any thing useful here?

thanks

where is code or hex file to simulate in proteus?

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where is code or hex file to simulate in proteus?

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where is code or hex file to simulate in proteus?

abdulmajeedtahir said:

where is code or hex file to simulate in proteus?

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where is code or hex file to simulate in proteus?

- - - Updated - - -

where is code or hex file to simulate in proteus?

Click to expand...

will you help solving some issues or what exactly?