With the Powerworld $23$ version $[$Problem $1]$ In Example $12\mathrm{.}4$ file, three phase equilibrium failures were caused on the bus line and the result was confirmed $($H $=3,$ D $=0)$

$1)$ Simulate the results of a phase $3$ equilibrium failure for $0\mathrm{.}335$ seconds, $0\mathrm{.}34,$ and $0\mathrm{.}345$ seconds on bus $3$ and describe which of the above $3$ times is the critical failure removal time

$2)$ Describe the difference between the effective power output of the generator and the effective power output value of the generator on bus $1$ in the normal state and explain why the phase angle of the generator should be constant

$3)$ If the size of H is increased to $5,$ we submit the simulation results of what happens to the phase angle of the generator at the critical failure removal time, and briefly describe the role of H

$4)$ Simulate all cases of increasing the size of D to $135,$ and briefly describe the role of D

$[$Question $2]$ Check the result in Example $13\mathrm{.}4$ file after increasing the load on the bus $8$ from $200$MW to $400$MW at t $=0\mathrm{.}5$sec

$1)$ Attached is the result of the final generator output and frequency variation and briefly described the description

$2)$ Attached is the result while removing the speed and exciter of all generators. Description of the role each of the speed and exciter performs while looking at the results