High Voltage Engineering INTRODUCTION 1 Generation and Transmission

High Voltage Engineering INTRODUCTION

1. Generation and Transmission of Electric Energy Early electric power systems v� The first public power station was put into service in 1882 in London. � To produce direct current at low voltage. v�Its service was limited to highly localized areas. v Used mainly for electric lighting. v v. The first major AC power station was commissioned in 1890 at Deptford. � v. To supply power over a distance of 28 miles. v� To produce alternative current at high voltage of 10 k. V.

1. Generation and Transmission of Electric Energy. . Power transfer capability P of AC system is approximately considered as: P=V 2/Z where Z is the wave impedance of a transmission line and V is the operating voltage. Power transfer capability of AC system and its relationships with operating voltage and transfer distance V/ k. V 220 330 500 750 1000 Z/ Ω 400 303 278 256 250 P/ MW 121 360 900 2200 4000 >1000 Transfer 100 -300 200 -600 Around dist. / km 1000

1. Generation and Transmission of Electric Energy. . Power transfer capability P of a bipolar DC system is approximately considered as: P= 2 Vd Id where Vd is the operating voltage of one line and Id is the current flowing through the line. Power transfer capability of bipolar DC system and its relationships with operating voltage ± Vd ± 400 / k. V P/ MW ± 500 ± 600 ± 700 ± 800 500~1000~3000 2500~4000~600 6000~9000 0 Id / A 600~1250 1000~3000 2100~3300 2150~430 2800~5600 0

1. Generation and Transmission of Electric Energy

1. Generation and Transmission of Electric Energy

2. Voltage Stresses

2. Voltage Stresses

3. Testing Voltages

4. Main contents of the course

4. Main contents of the course

Oil Filled transformer

Impulse Voltage Generator

Home Work: Get idea of Some recent Application of High Voltage Engineering ?

Cascaded rectifier with pulse generator

VOLTAGE MULTIPLIER CIRCUIT Cockcroft-Walton