Hi,
please do not send me private massages as I do not reply to them.
I'm not using PSpice at all (since ~20 years; I'm getting old
). I'm using LTspice very frequently, so I implemented your boost converter in LTspice. See the pictures below. There are no IGBTs available in LTspice, so I imported the provided SPICE model by Infineaon and created the symbol (I haven't but much effort in it).
According to your switching frequency with a duty cycle of about 70 %, your aimed output voltage is around 650 V. I increased the gate resistor from 4.7 Ω to 100 Ω, as the total gate inrush current has been in the range of a couple of amps. The higher resistance leads to an increased duty cycle of about 75 %, as it takes longer to discharge the IGBT gate capacitances. Consequently, the output voltage is about 800 V. As you can see, increasing the gate resistor leads also to a reduction of the switch on current spikes, as the IGBTs are turned on slower. This will most likely also increase IGBT losses during the on and off transistion, you should have a closer look.
In general, when running your simulation have a look at your output voltage and evaluate your signals when the steady state has been reached (aimed output voltage is met). As can be seen below, at the start-up the initial currents are very high, as the empty capacitor has to be charged also the output voltage is overshooting. You may introduce some prasitic components or more realaistic discrete components i.e. an inductor including a DCR.
View attachment 175081
View attachment 175082
View attachment 175083
BR