LIST OF ABBREVIATION AND ACRONYM
AC alternating current
DC direct current
TV television
V volt
KVA kilo watt/ ampere
HZ frequency
MG motor generator
UPS uninterrupted power supply
W watt
SMF sealed maintenance free
CCCV constant current constant voltage
FLC fuzzy logic control
PC personal computer
NC normal current
HC high current
WPS without uninterrupted power supply
DB distribution box
VBAT battery voltage
VLDC load voltage direct current
IBATT battery current
VAC Alternating current voltage
ILAMP Load current ampere
Fig Figure
ABSTRACT
The initial cost of the power inverter system is significant higher compared to the conventional source of power. As a result, there is need for the performance evaluation of various power inverters in order to determine the cost efficiency of the power inverter as an alternative source of power. The aim of the present study is to investigate the performance index of 3.5KVA/48V inverters for domestic source of electric power supply.Four types of inverters (Mercury, Safer Power, Sinergy and Su-Kam) commonly available in the market were considered.And three performance indices (resistive load test, inductive load test and output waveform) were used to determine the cost effectiveness of one inverter over the other. Results showed that the Sinergy Power Inverter has the best performance. In terms of the battery discharge current, Sinergy is 35% (for the resistive) and 61% (for inductive test) more efficient compared to Mercury at an output load of 1 kW.
CONTENT
Front Page i
Declaration ii
Certification iii
Dedication iv
Acknowledgement v
List of abbreviation and acronym vi
Abstract viii
Content of contents ix
chapter one
1.2 Statement of the Problem 3
1.7 Significance of the Study 5
chapter two
literature review
2.1 Overview of Energy Conversion Techniques 6
2.2.1 Classification of Inverter 12
2.2.2 Advantages and Disadvantages of Inverter 13
2.2.3 Things to Consider Before Buying An Inverter 13
2.4 Inverter Battery Connection 20
chapter three
Materials Used On Installation Experimentation 24
CHAPTER FOUR
4.2 Sinergy Inverter Load Test 41
4.5 Bill of Engineering Measurement And Evaluation 53
CONCLUSION AND RECOMMENDATION 54
CHAPTER ONE
INTRODUCTION
1.1 Background to the Study
Electric power interruptions are quite common in every place, especially after a heavy down pour or a severe storm. To counter this power outage, a search has been to find a reliable and economical alternative source of electricity. Although this kind of project has been dealt with for quite a number of time but the fact still remains that an improvement needs to be done. This in essence makes the project topic “Investigation of the performance index of 3.5KVA/48V inverter” purposeful and resourceful.
An inverter is a device or an electronic that converts or inverts a direct current into a conventional alternating current. A power inverter is a great tool used to run household / office appliances, where there is no electricity. The input voltage and frequency of the inverter may be fixed or it may vary depending on its application. Inverters finds several applications of which are the valuable speed, alternating current motors, uninterrupted power supply etc. They can be used as the front stage of dc to dc converter. Standby inverters are mostly used to provide emergency supply to the main frequency (50Hz). In the event of main failure, the inverter immediately operates with no loss of waveform. This unique ability makes it related to an automatic change over switch but it differs in a way in that it has a battery, which stores energy when the mains is on and gives out energy when the mains is off while the automatic change over switch operates on contactor (open and close).
There are many types of inverter as described in chapter 2, but they all have the same principle of operations and it all depends on the component used, whether with a thyristor or a bipolar junction transistor for switching the current ON/OFF. The need for man to prevent his activities from being interrupted in order not to render it incomplete which may subsequently become an unfinished job (loss of files in the computer when there is a sudden power outage) has motivated engineers across the globe to design a device which will be more economical, durable and efficient.
