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High Voltage Engineering Education Using PSCAD/EMTDC Program Preecha Sakarung Section of Electrical Engineering, Rajamangala University of Technology Suvarnabhumi, Supanburi, Thailand. Contents. INTRODUCTION MATERIALS AND METHODS Impulse Voltage Generator

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High Voltage Engineering Education Using

PSCAD/EMTDC Program

Preecha Sakarung

Sectionof Electrical Engineering,

Rajamangala University of Technology Suvarnabhumi,

Supanburi, Thailand


Contents

  • INTRODUCTION

  • MATERIALS AND METHODS

    • Impulse Voltage Generator

    • Multi-stage Impulse Generator

    • Voltage Multiplier

  • RESULTS

    • Basic Impulse Voltage

    • Multi-stage Impulse Generator

    • Voltage Multiplier

  • DISCUSSION

July 9-11, 2012, Thailand


INTRODUCTION

Problems of high voltage laboratory :

  • The actual HV test equipment is expensive.

  • The set-up process is time-consuming.

  • The laboratory activities are somehow dangerous.

  • HV technicians team is not easy to form.

July 9-11, 2012, Thailand


INTRODUCTION

Even though an actual HV laboratory seems impractical, using a computer program to simulate high voltage circuits and demonstrate them in class is therefore an advisable solution.

July 9-11, 2012, Thailand


INTRODUCTION

Advantage of using computer program :

  • different output responses can be monitored by

    changing parameters.

  • Transient phenomena (including steady-state

    phenomena) of each circuit component are clearly

    shown.

  • it can be recorded in high quality graphics.

July 9-11, 2012, Thailand


INTRODUCTION

Why using PSCAD/EMTDC ?

  • The widely used computer software to simulate in

    transient phenomena is Electro-Magnetic Transients

    Program (EMTP).

  • PSCAD/EMTDC, which is developed from EMTP, is a

    time domain digital simulation using the trapezoidal rule

    of variable integration.

  • EMTDC thus allows more realistic representation of a

    system through its physical components.

July 9-11, 2012, Thailand


INTRODUCTION

In this paper, three illustrations of HV generating circuits supported by the PSCAD/EMTDC in evaluation version 4.2.1 are shown.

July 9-11, 2012, Thailand


MATERIALS AND METHODS

Impulse Voltage Generator

Two types of impulse representing natural lightning strokes can be simulated.

  • impulse voltage

  • impulse current

July 9-11, 2012, Thailand


Impulse voltage & Impulse current

Impulse voltage which is used in various standard techniques to study or test whether or which level the electric equipments can withstand lightning strokes and switching operations.

Impulse current which is used not only to test surge arrester but to study the electric-arc and electric-plasma.

July 9-11, 2012, Thailand


General impulse waveform

July 9-11, 2012, Thailand


General impulse waveform

July 9-11, 2012, Thailand


Impulse voltage & Impulse current

The basic circuit of a single-stage impulse generator is shown in Fig. 2 and the double exponential equation which depends on values of R and C variables is shown in equation (2).

July 9-11, 2012, Thailand


Impulse voltage & Impulse current

July 9-11, 2012, Thailand


Multi-stage Impulse Generator

The corona discharge is the problem of a single-stage impulse circuit. In 1923, Marx therefore proposed a multi-stage impulse circuit. The modified three-stage circuit is presented in Fig. 3.

July 9-11, 2012, Thailand


Multi-stage Impulse Generator

July 9-11, 2012, Thailand


Voltage Multiplier

July 9-11, 2012, Thailand


RESULTS

Basic Impulse Voltage

July 9-11, 2012, Thailand


RESULTS

Multi-stage Impulse Generator

July 9-11, 2012, Thailand


RESULTS

Voltage Multiplier

July 9-11, 2012, Thailand


RESULTS

Voltage Multiplier

July 9-11, 2012, Thailand


DISCUSSION

  • The computer software like PSCAD/EMTDC is an important tool for high voltage engineering education in Thailand.

  • It is certain that both students and teachers will gain more experience in designing and testing the simulations in dynamic practice.

July 9-11, 2012, Thailand


DISCUSSION

  • For classroom benefits, the application of this program can simulate and present phenomena that are difficult or impossible to see even in a real HV laboratory.

July 9-11, 2012, Thailand


DISCUSSION

  • Moreover, for laboratory benefits, the preparation for laboratory activities can be done prior to the actual laboratory sessions by using the program for simulations and this results in better time management as it allows no wasting time for setting up.

July 9-11, 2012, Thailand


DISCUSSION

  • For further research, the application of this software on different topics regarding High Voltage theory should be taken into account.

July 9-11, 2012, Thailand



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