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| author | nice | 2014-09-16 17:48:17 +0530 |
|---|---|---|
| committer | nice | 2014-09-16 17:48:17 +0530 |
| commit | b9ebc3adfe1cd0b17f061dd639a5c76329e09afa (patch) | |
| tree | b86470bf2c0f61f0d2d8facadbc9c62336d77f43 /Principles_of_Power_System/chapter26.ipynb | |
| parent | dfe3c858e90bb33c32f84a46e0a17cdd93b38e11 (diff) | |
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diff --git a/Principles_of_Power_System/chapter26.ipynb b/Principles_of_Power_System/chapter26.ipynb new file mode 100755 index 00000000..d4334600 --- /dev/null +++ b/Principles_of_Power_System/chapter26.ipynb @@ -0,0 +1,224 @@ +{
+ "metadata": {
+ "name": "",
+ "signature": "sha256:260bb8beffe2e4d2155fdaec0c7462f8cf5127d60c79f0bddb469ea9aad62673"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter 26: Neutral Grounding"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 3,
+ "metadata": {},
+ "source": [
+ "Example 26.1, Page Number: 599"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "from __future__ import division\n",
+ "import math\n",
+ "\n",
+ "#Variable declaration:\n",
+ "f = 50 #Supply frequency(Hz)\n",
+ "C = 4.5*10**-6 #Line to earth capacitance(F)\n",
+ "\n",
+ "\n",
+ "#Calculation:\n",
+ "XL = 1/(3*2*math.pi*f*C) #ohm\n",
+ "\n",
+ "\n",
+ "#Result:\n",
+ "print \"The reactance of Peterson coil is\",round(XL,1),\"ohm\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The reactance of Peterson coil is 235.8 ohm\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "heading",
+ "level": 3,
+ "metadata": {},
+ "source": [
+ "Example 26.2, Page Number: 599"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "from __future__ import division\n",
+ "import math\n",
+ "\n",
+ "#Variable declaration:\n",
+ "l = 200 #length of transmission line(km)\n",
+ "f = 50 #Supply frequency(Hz)\n",
+ "c = 0.02*10**-6 #Line to earth capacitance(F/km)\n",
+ "V = 230 #voltage rating of line(kV)\n",
+ "\n",
+ "\n",
+ "#Calculation:\n",
+ "C = c*l #capacitance of coil(F)\n",
+ "L = round(1/(3*(2*3.14*f)**2*C),2) #Required inductance of Peterson coil(H)\n",
+ "Vph = round(V*1000/1.732) #Voltage across Peterson coil(kV)\n",
+ "IF = math.ceil(Vph/(2*3.13*f*L)) #Current through Peterson coil(A)\n",
+ "kVA = Vph*IF/1000 #Rating of Peterson coil\n",
+ "\n",
+ "\n",
+ "\n",
+ "#Calculation:\n",
+ "print \"Inductance of Peterson coil is\",L,\"H\"\n",
+ "print \"Rating of Peterson coil is\",round(kVA),\"kVA\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Inductance of Peterson coil is 0.85 H\n",
+ "Rating of Peterson coil is 66397.0 kVA\n"
+ ]
+ }
+ ],
+ "prompt_number": 4
+ },
+ {
+ "cell_type": "heading",
+ "level": 3,
+ "metadata": {},
+ "source": [
+ "Example 26.3, Page Number: 600"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "from __future__ import division\n",
+ "import math\n",
+ "\n",
+ "#Variable declaration:\n",
+ "f = 50 #fequency of supply(Hz)\n",
+ "C = 1.2*10**-6 #line-to-earth capacitance(F)\n",
+ "\n",
+ "\n",
+ "#Calculation:\n",
+ "#(i) To neutralize capacitance of 100% of the length of the line,\n",
+ "#Inductive reactance of the coilis given by\n",
+ "XL1 = 1/(3*2*math.pi*f*C) #ohm\n",
+ "\n",
+ "#(ii) To neutralize capacitance of 90% of the length of the line,\n",
+ "#Inductive reactance of the coilis given by\n",
+ "XL2 = 1/(3*2*math.pi*f*0.9*C) #ohm\n",
+ "\n",
+ "\n",
+ "#(iii) To neutralize capacitance of 80% of the length of the line,\n",
+ "#Inductive reactance of the coilis given by\n",
+ "XL3 = 1/(3*2*math.pi*f*0.8*C) #ohm\n",
+ "\n",
+ "\n",
+ "#Result:\n",
+ "print \"(i) Inductive reactance of the coil to neutralize capacitance\"\n",
+ "print \" of 100% of the length of the line is\",round(XL1,2),\"ohm\"\n",
+ "print \"\\n(ii) Inductive reactance of the coil to neutralize capacitance\"\n",
+ "print \" of 100% of the length of 90% of the line is\",round(XL2,2),\"ohm\"\n",
+ "print \"\\n(iii)Inductive reactance of the coil to neutralize capacitance\"\n",
+ "print \" of 100% of the length of 80% of the line is\",round(XL3,2),\"ohm\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "(i) Inductive reactance of the coil to neutralize capacitance\n",
+ " of 100% of the length of the line is 884.19 ohm\n",
+ "\n",
+ "(ii) Inductive reactance of the coil to neutralize capacitance\n",
+ " of 100% of the length of 90% of the line is 982.44 ohm\n",
+ "\n",
+ "(iii)Inductive reactance of the coil to neutralize capacitance\n",
+ " of 100% of the length of 80% of the line is 1105.24 ohm\n"
+ ]
+ }
+ ],
+ "prompt_number": 5
+ },
+ {
+ "cell_type": "heading",
+ "level": 3,
+ "metadata": {},
+ "source": [
+ "Example 26.4, Page Number: 600"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "from __future__ import division\n",
+ "import math\n",
+ "\n",
+ "#Variable declaration:\n",
+ "r = 0.01 #radius of conductor(m)\n",
+ "d = 4 #conductor spacing(m)\n",
+ "V = 132 #voltage of the line(kV)\n",
+ "f = 50 #supply frequency(Hz)\n",
+ "l = 200 #line length(km)\n",
+ "\n",
+ "\n",
+ "#Calculation:\n",
+ "c = round(2*math.pi*8.885/math.log(d/r),1)*10**-12 #capacitance per unit length(F/m)\n",
+ "C = c*l*1000 #Capacitance between phase and earth for 200 km line(F)\n",
+ "L = round(1/(3*(2*math.pi*f)**2*C),2) #required inductance L of the arc suppression coil(H)\n",
+ "IF = V*1000/(10*math.ceil(3**0.5*2*math.pi*f*L/10)) #Current through the coil(A)\n",
+ "kVA = V/3**0.5*IF #kVA\n",
+ "\n",
+ "\n",
+ "#Result:\n",
+ "print \"The inductance of the coil is\",L,\"H\"\n",
+ "print \"Rating of the coil is\",round(kVA),\"kVA\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The inductance of the coil is 1.82 H\n",
+ "Rating of the coil is 10060.0 kVA\n"
+ ]
+ }
+ ],
+ "prompt_number": 6
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
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