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| author | hardythe1 | 2015-06-11 17:31:11 +0530 |
|---|---|---|
| committer | hardythe1 | 2015-06-11 17:31:11 +0530 |
| commit | 251a07c4cbed1a5a960f5ed416ce6ac13c8152b7 (patch) | |
| tree | cb7f084fad6d7ee6ae89e586fad0e909b5408319 /Electrical_Power_System_by_C.L._Wadhwa/Chapter22.ipynb | |
| parent | 47d7279a724246ef7aa0f5359cf417992ed04449 (diff) | |
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diff --git a/Electrical_Power_System_by_C.L._Wadhwa/Chapter22.ipynb b/Electrical_Power_System_by_C.L._Wadhwa/Chapter22.ipynb new file mode 100755 index 00000000..a1ea00fe --- /dev/null +++ b/Electrical_Power_System_by_C.L._Wadhwa/Chapter22.ipynb @@ -0,0 +1,268 @@ +{
+ "metadata": {
+ "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter 22 : Power System Voltage Stability"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 22.2, Page No 725"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "#initialisation of variables\n",
+ "Vb=500.0\n",
+ "Sb=1000.0\n",
+ "\n",
+ "#Calculations\n",
+ "Zb=Vb**2/Sb\n",
+ "Xpu=.35*100/Zb\n",
+ "Zth=1000/5000.0\n",
+ "X=Xpu+Zth\n",
+ "V=1.0\n",
+ "Q=0\n",
+ "P=1.0\n",
+ "Eth=V+(Q*X/V)+complex(P*X/V)\n",
+ "Q=0.75\n",
+ "Eth1=V+(Q*X/V)+complex(P*X/V)\n",
+ "\n",
+ "#Results\n",
+ "print(\"(i) For p.f unity , Eth= {0:.5f}+{1:.5f}i\".format(Eth.real, Eth.imag))\n",
+ "print(\"(i) For p.f .8 , Eth= {0:.5f}+{1:.5f}i\".format(Eth1.real, Eth1.imag))"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "(i) For p.f unity , Eth= 1.34000+0.00000i\n",
+ "(i) For p.f .8 , Eth= 1.59500+0.00000i\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 22.3, Page No 726"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "#initialisation of variables\n",
+ "X=.625\n",
+ "P=1.0\n",
+ "Q=0.6\n",
+ "V=1.0\n",
+ "\n",
+ "#Calculations\n",
+ "Eth=V+(Q*X/V)+complex(P*X/V)\n",
+ "Phase_Eth=math.degrees(math.atan(Eth.imag/Eth.real))\n",
+ "\n",
+ "#Results\n",
+ "print(\"Eth=%.2f at an angle %.0f degrees\" %(abs(Eth),Phase_Eth))"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Eth=2.00 at an angle 0 degrees\n"
+ ]
+ }
+ ],
+ "prompt_number": 2
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 22.4, Page No 732"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "#initialisation of variables\n",
+ "P=0.5\n",
+ "toff=4.0\n",
+ "\n",
+ "#Calculations\n",
+ "ton=(P*toff-0*toff)/(0.8-P)\n",
+ "\n",
+ "#Results\n",
+ "print(\"Toff= 4min .\")\n",
+ "print(\"ton(min.)=%.3f min.\" %ton)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Toff= 4min .\n",
+ "ton(min.)=6.667 min.\n"
+ ]
+ }
+ ],
+ "prompt_number": 3
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 22.6 Page No 739"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "#initialisation of variables\n",
+ "V=1.0\n",
+ "Qload=1.0*V\n",
+ "Qcap=-0.75*V**2\n",
+ "\n",
+ "#Calculations\n",
+ "Qnet=Qload+Qcap\n",
+ "VS=1-0.75*2*V # voltage sensitivity\n",
+ "\n",
+ "#Results\n",
+ "print(\"Voltage sensitivity=%.3f\" %VS)\n",
+ "print(\"since the voltage sensitivity is negative,\\nvoltage regulation by tap changing will reduce net reactive load and improive voltage stability \")"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Voltage sensitivity=-0.500\n",
+ "since the voltage sensitivity is negative,\n",
+ "voltage regulation by tap changing will reduce net reactive load and improive voltage stability \n"
+ ]
+ }
+ ],
+ "prompt_number": 4
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 22.7, Page No 740"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "#initialisation of variables\n",
+ "Y=complex(-10)\n",
+ "n=1+0.1\n",
+ "\n",
+ "#Calculations\n",
+ "Y1=n*(n-1)*Y\n",
+ "Y2=(1-n)*Y\n",
+ "\n",
+ "#Results\n",
+ "print(\"Y1= {0:.2f}+{1:.2f}i\".format(Y1.real, Y1.imag))\n",
+ "print(\"Y2= {0:.2f}+{1:.2f}i\".format(Y2.real, Y2.imag))\n",
+ "print(\"The shunt elements equal to a reactor of 1.1V1^2 size oin the primary side and a capacitive of sixe 1V2**2 on the secondary side\")"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Y1= -1.10+0.00i\n",
+ "Y2= 1.00+-0.00i\n",
+ "The shunt elements equal to a reactor of 1.1V1^2 size oin the primary side and a capacitive of sixe 1V2**2 on the secondary side\n"
+ ]
+ }
+ ],
+ "prompt_number": 5
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 22.8, Page No 745"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "#initialisation of variables\n",
+ "P=1.0\t\t#assuming\n",
+ "S1=P/.95\t#For pf .95\n",
+ "S2=P/.8\t\t#For pf .8\n",
+ "\n",
+ "#Calculations\n",
+ "dMVA=(S2-S1)*100.0/P\t\t#Increase in MVA rating \n",
+ "Q1=P*math.tan(math.radians(math.degrees(math.acos(0.95))))\t\t#Q for pf .95\n",
+ "Q2=P*math.tan(math.radians(math.degrees(math.acos(0.8))))\t\t#Q for pf .8\n",
+ "dPc=(Q2-Q1)*100.0/Q1\t\t#Percent additional Reactive Power Capability \n",
+ "\n",
+ "#Results\n",
+ "print(\"Percent additional Reactive Power Capability is %.2f\" %dPc)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Percent additional Reactive Power Capability is 128.18\n"
+ ]
+ }
+ ],
+ "prompt_number": 6
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
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