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diff --git a/Electrical_Power_Systems_by_C_L_Wadhwa/6-CORONA.ipynb b/Electrical_Power_Systems_by_C_L_Wadhwa/6-CORONA.ipynb new file mode 100644 index 0000000..95c5c18 --- /dev/null +++ b/Electrical_Power_Systems_by_C_L_Wadhwa/6-CORONA.ipynb @@ -0,0 +1,192 @@ +{ +"cells": [ + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "# Chapter 6: CORONA" + ] + }, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 6.1: EX6_1.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"//To determine the critical disruptive voltage and critical voltage for local and general corona.\n", +"clear\n", +"clc;\n", +"t=21;// air temperature\n", +"b=73.6;// air pressure\n", +"do=3.92*73.6/(273+t);\n", +"m=.85;\n", +"r=.52;\n", +"d=250;\n", +"Vd=21.1*m *do*r*log(250/.52);\n", +"vd=sqrt(3)*Vd;\n", +"m=.7;\n", +"vv=21.1*m*do*r*(1+ (.3/sqrt(r*do)))*log(250/.52);\n", +"Vv=vv*sqrt(3);\n", +"Vvg=Vv*.8/.7;\n", +"mprintf('critical disruptive line to line voltage=%.2f kV \n',vd);\n", +"mprintf('visual critical voltage for local corona=%.2f kV \n',vv);\n", +"mprintf('visual critical voltage for general corona=%.2f kV \n',Vvg);" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 6.2: To_determine_whether_corona_will_be_present_in_the_air_space_round_the_conductor.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"// To determine whether corona will be present in the air space round the conductor\n", +"clear\n", +"clc;\n", +"d=2.5;\n", +"di=3;// internal diameter\n", +"do=9;// external diameter\n", +"ri=di/2;// internal radius\n", +"ro=do/2;// external diameter\n", +"g1max=20/(1.25*log(ri/(d/2))+ .208*1.5*log(ro/ri));\n", +"mprintf('g1max=%.0f kV/cm \n',g1max);\n", +"mprintf('Since the gradient exceeds 21.1/kV/cm , corona will be present.')" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 6.3: To_determine_the_critical_disruptive_voltage_and_corona_loss.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"// To determine the critical disruptive voltage and corona loss \n", +"clear\n", +"clc;\n", +"m=1.07;\n", +"r=.625\n", +"V=21*m *r*log(305/.625);\n", +"Vl=V*sqrt(3);\n", +"mprintf('critical disruptive voltage=%.0f kV\n',V);\n", +"mprintf('since operating voltage is 110 kV , corona loss= 0 ');" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 6.4: To_determine_the_voltage_for_which_corona_will_commence_on_the_line.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"//To determine the voltage for which corona will commence on the line\n", +"clear\n", +"clc;\n", +"r=.5;\n", +"V=21*r*log(100/.5);\n", +"mprintf('critical disruptive voltage=%.1f kV',V);" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 6.5: To_determine_the_corona_characterstics.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"//To determine the corona characterstics\n", +"clear\n", +"clc;\n", +"D=1.036;// conductor diameter(cm)\n", +"d=2.44;//delta spacing(m)\n", +"r=D/2;//radius(cm)\n", +"Ratio=d*100/r;\n", +"j=r/(d*100);\n", +"Rat2=sqrt(j);\n", +"t=26.67;//temperature\n", +"b=73.15;// barometric pressure\n", +"mv=.72;\n", +"V=63.5;\n", +"f=50;//frequency\n", +"do=3.92*b/(273+t);//do=dell\n", +"vd=21.1*.85*do*r*log(Ratio);\n", +"mprintf('critical disruptive voltage=%.2f kV\n',vd);\n", +"Vv=21.1*mv*do*r*(1+ (.3/sqrt(r*do)))*log(Ratio);\n", +"Pl=241*(10^-5)*(f+25)*Rat2*((V-vd)^2)/do;//power loss\n", +"Vd=.8*vd;\n", +"Pl2=241*(10^-5)*(f+25)*Rat2*((V-Vd)^2)*160/do;//loss per phase /km\n", +"Total= 3*Pl2;\n", +"mprintf('visual critical voltage=%.0f kV\n',Vv);\n", +"mprintf('Power loss=%.3f kW/phase/km\n',Pl);\n", +"mprintf('under foul weather condition ,\n');\n", +"mprintf('critical disruptive voltage=%.2f kV\n',Vd);\n", +"mprintf('Total loss=%.0f kW\n',Total);" + ] + } +], +"metadata": { + "kernelspec": { + "display_name": "Scilab", + "language": "scilab", + "name": "scilab" + }, + "language_info": { + "file_extension": ".sce", + "help_links": [ + { + "text": "MetaKernel Magics", + "url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md" + } + ], + "mimetype": "text/x-octave", + "name": "scilab", + "version": "0.7.1" + } + }, + "nbformat": 4, + "nbformat_minor": 0 +} |