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{
"metadata": {
"name": ""
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 11 : Neutral Grounding"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 11.1, Page No 251"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"#initialisation of variables\n",
"C1=2*math.pi*(10**-9)/(36*math.pi*math.log((4*4*8)**(1.0/3)/(10*(10**-3))))\n",
"\n",
"#Calculations\n",
"C=C1*192*(10**9) #capacitance per phase (micro farad)\n",
"L=(10)**6.0/(3*314*314*C)\n",
"V=132.0 #voltage (kV)\n",
"MVA=V*V/(3.0*314*L)\n",
"\n",
"#Results\n",
"print(\"inductance ,L=%.2f H\" %L)\n",
"print(\"MVA rating of suppressor coil =%.3f MVA per coil\" %MVA)\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"inductance ,L=1.97 H\n",
"MVA rating of suppressor coil =9.379 MVA per coil\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 11.2, Page No 252"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"#initialisation of variables\n",
"wL=1.0/(3*314*(10)**-6)\n",
"\n",
"#Calculations\n",
"print(\"(i)inductive reactance for 100 percent of the length of line=%.1f ohms\" %wL)\n",
"wL=10.0**6/(3*314*.9)\n",
"\n",
"#Results\n",
"print(\"(ii)inductive reactance for 90percent of the length of line=%.1f ohms\" %wL)\n",
"wL=1.0/(3*314*(10)**-6)/.8\n",
"print(\"(iii)inductive reactance for 80 percent of the length of line=%.1f ohms\" %wL)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"(i)inductive reactance for 100 percent of the length of line=1061.6 ohms\n",
"(ii)inductive reactance for 90percent of the length of line=1179.5 ohms\n",
"(iii)inductive reactance for 80 percent of the length of line=1327.0 ohms\n"
]
}
],
"prompt_number": 2
}
],
"metadata": {}
}
]
}
|
