updated books

1 files changed, 0 insertions, 212 deletions

diff --git a/Principles_of_Power_System/chapter19_1.ipynb b/Principles_of_Power_System/chapter19_1.ipynb
deleted file mode 100644
index e6813a0f..00000000
--- a/Principles_of_Power_System/chapter19_1.ipynb
+++ /dev/null
@@ -1,212 +0,0 @@
-{

- "metadata": {

-  "name": "",

-  "signature": "sha256:34f21e34d56021d11e412854716405b885521e02b7e263afa0b62d127f14da0d"

- },

- "nbformat": 3,

- "nbformat_minor": 0,

- "worksheets": [

-  {

-   "cells": [

-    {

-     "cell_type": "heading",

-     "level": 1,

-     "metadata": {},

-     "source": [

-      "Chapter 19: Circuit Breakers"

-     ]

-    },

-    {

-     "cell_type": "heading",

-     "level": 3,

-     "metadata": {},

-     "source": [

-      "Example 19.1, Page Number: 483"

-     ]

-    },

-    {

-     "cell_type": "code",

-     "collapsed": false,

-     "input": [

-      "from __future__ import division\n",

-      "\n",

-      "#Variable declaration:\n",

-      "I = 1500                      #rated current of circuit breaker(A)\n",

-      "MVA = 1000                    #MVA rating of CB\n",

-      "V = 33                        #voltage rating of circuit breaker(kV)\n",

-      "\n",

-      "\n",

-      "\n",

-      "#Calculation:\n",

-      "Is = MVA*10**6/(3**0.5*33*1000)    #Rated symmetrical breaking current(A,rms)\n",

-      "Im = 2.55*Is                   #Rated making current(A,peak)\n",

-      "\n",

-      "\n",

-      "#Result:\n",

-      "print \"(i) Rated normal current is\",I,\"A\"\n",

-      "print \"(ii) Breaking capacity is\",MVA,\"MVA\"\n",

-      "print \"(iii) Rated symmetrical breaking current is\",round(Is),\"A  (peak)\"\n",

-      "print \"(iv) Rated making current is\",round(Im),\"A  (peak)\"\n",

-      "print \"(v) Short-time rating is\",round(Is),\"for 3 seconds\"\n",

-      "print \"(vi) Rated service voltage is\",V,\"kV (r.m.s)\""

-     ],

-     "language": "python",

-     "metadata": {},

-     "outputs": [

-      {

-       "output_type": "stream",

-       "stream": "stdout",

-       "text": [

-        "(i) Rated normal current is 1500 A\n",

-        "(ii) Breaking capacity is 1000 MVA\n",

-        "(iii) Rated symmetrical breaking current is 17495.0 A  (peak)\n",

-        "(iv) Rated making current is 44613.0 A  (peak)\n",

-        "(v) Short-time rating is 17495.0 for 3 seconds\n",

-        "(vi) Rated service voltage is 33 kV (r.m.s)\n"

-       ]

-      }

-     ],

-     "prompt_number": 1

-    },

-    {

-     "cell_type": "heading",

-     "level": 3,

-     "metadata": {},

-     "source": [

-      "Example 19.2, Page Number: 484"

-     ]

-    },

-    {

-     "cell_type": "code",

-     "collapsed": false,

-     "input": [

-      "from __future__ import division\n",

-      "import math\n",

-      "\n",

-      "#Variable declaration:\n",

-      "f = 50                     #supply frequency(Hz)\n",

-      "V = 11                      #voltage rating of generator(V)\n",

-      "C = 0.01         #distributed capacitance upto ckt breaker b/w phase and neutral(uF)\n",

-      "XL = 5                   #reactance of neatral to earth(ohm)\n",

-      "\n",

-      "\n",

-      "#Calculation:\n",

-      "L = round(XL/(2*math.pi*f),4)            #Inductance per phase(H)\n",

-      "Emax = round(2**0.5*V/3**0.5,2)     #Maximum value of recovery voltage (phase to neutral)(V\n",

-      "E = 2*Emax                          #Peak re-striking voltage(kV)\n",

-      "fn = 1/(2*3.14*(L*C*10**-6)**0.5)     #frequency of oscillations(Hz)\n",

-      "\n",

-      "#Since peak re-striking voltage occurs at a time t given by\n",

-      "t = 1/(2*fn)                        #s\n",

-      "r = E/t                             #kV/sec\n",

-      "\n",

-      "\n",

-      "\n",

-      "#Result:\n",

-      "print \"(i)  Peak re-striking voltage is\",round(E,2),\"kV\"\n",

-      "print \"(ii) Frequency of oscillations is\",round(fn),\"Hz\"\n",

-      "print \"(iii)The average rate of rise of re-striking voltage\"\n",

-      "print \"     upto the first peak is\",math.floor(r/1000),\"*10**3   kV/sec\""

-     ],

-     "language": "python",

-     "metadata": {},

-     "outputs": [

-      {

-       "output_type": "stream",

-       "stream": "stdout",

-       "text": [

-        "(i)  Peak re-striking voltage is 17.96 kV\n",

-        "(ii) Frequency of oscillations is 12628.0 Hz\n",

-        "(iii)The average rate of rise of re-striking voltage\n",

-        "     upto the first peak is 453.0 *10**3   kV/sec\n"

-       ]

-      }

-     ],

-     "prompt_number": 1

-    },

-    {

-     "cell_type": "heading",

-     "level": 3,

-     "metadata": {},

-     "source": [

-      "Example 19.3, Page Number: 484"

-     ]

-    },

-    {

-     "cell_type": "code",

-     "collapsed": false,

-     "input": [

-      "#Variable delaration:\n",

-      "t = 50*10**-6              #time to reach the peak re-striking voltage(s)\n",

-      "Vp = 100                    #the peak re-striking voltage(kV)\n",

-      "\n",

-      "\n",

-      "#Calculation:\n",

-      "R = Vp/t                  #Average RRRV(kV/sec)\n",

-      "fn = 1/(2*t)                 #Natural frequency of oscillations(Hz)\n",

-      "\n",

-      "\n",

-      "#Result:\n",

-      "print \"Average RRRV is\",R/10**6,\"* 10**6   kV/sec\"\n",

-      "print \"Natural frequency of oscillations is\",fn,\"Hz\""

-     ],

-     "language": "python",

-     "metadata": {},

-     "outputs": [

-      {

-       "output_type": "stream",

-       "stream": "stdout",

-       "text": [

-        "Average RRRV is 2.0 * 10**6   kV/sec\n",

-        "Natural frequency of oscillations is 10000.0 Hz\n"

-       ]

-      }

-     ],

-     "prompt_number": 3

-    },

-    {

-     "cell_type": "heading",

-     "level": 3,

-     "metadata": {},

-     "source": [

-      "Example 19.4, Page Number: 485"

-     ]

-    },

-    {

-     "cell_type": "code",

-     "collapsed": false,

-     "input": [

-      "from __future__ import division\n",

-      "\n",

-      "#Variable declaration:\n",

-      "Im = 11                   #magnetising current of transformer(A)\n",

-      "Ic = 7                    #chopped instantaneous value of current(A)\n",

-      "L = 35.2                  #inductance (H)\n",

-      "C = 0.0023                #capacitance(uF)\n",

-      "\n",

-      "\n",

-      "#Result:\n",

-      "e = Ic*(L/(C*10**-6))**0.5         #Voltage across breaker contacts at chopping(V)\n",

-      "\n",

-      "\n",

-      "#Result:\n",

-      "print \"Voltage across breaker contacts at chopping is\",round(e/1000),\"kV\""

-     ],

-     "language": "python",

-     "metadata": {},

-     "outputs": [

-      {

-       "output_type": "stream",

-       "stream": "stdout",

-       "text": [

-        "Voltage across breaker contacts at chopping is 866.0 kV\n"

-       ]

-      }

-     ],

-     "prompt_number": 10

-    }

-   ],

-   "metadata": {}

-  }

- ]

-}
\ No newline at end of file