ASSESSMENT OF POWER SYSTEM RELIABILITY

  • : Ms Word, Ms Word Format
  • : 77 Pages
  • : ₦3,000 | $25 | ₵60 | Ksh 2720
  • : 1-5 Chapters
  •  
  • Click to DOWNLOAD Materials

ASSESSMENT OF POWER SYSTEM RELIABILITY

ABSTRACT

A power system is set up basically to meet the demands of the customers. However, interruptions which are largely unavoidable contribute to the unavailability of power and thus prevent power system from achieving this. In most cases, it is the sustained interruptions that greatly affect both the utility company and its customers. Hence, it is necessary to find means of determining which component failure contributes most to the unavailability of the distribution system, and how this unavailability actually affects the customers. This is to enable system planners and designers to seek better ways of improving the reliability of a typical secondary distribution substation system having a single-end fed radial configuration. By using analytical method and network reduction technique, the substation reliability was analyzed based on the outage data gotten from the utility company. The conclusion from this work shows that transformer failure followed by the fuse failure contributes most to the substation’s unavailability. The overall system availability shows that the system’s performance is poor.

 

 

 

CHAPTER 1

INTRODUCTION

1.1          BACKGROUND

The electric utility is expected to provide continuous and quality of electric service to their customers at a reasonable rate by making economical use of available system and apparatus. To maintain reliable service to customers, the utility has to have adequate redundancy in its system to prevent a component outage becoming a service interruption to the customers, causing loss of goods, services or benefits.
Reliability costs are used for rate reviews and request for rate increases. Therefore in order to calculate the cost of reliability, the cost of an outage must be determined. Technique which can be used to determine the cost of outages in relation to loss of goodwill, loss of production, and damaged goods. The economic analysis of system reliability can also be a very useful planning tool in determining the capital expenditures required to improve service reliability by providing the real value of additional investments into the system (Gonen 2014).. Lastly, expectation indices, which are most often used to express the adequacy of the generation configuration, characterize future system performance in a satisfactory manner.

The reliability standards for electricity supply in a developing country, like Nigeria, have to be determined on past engineering principles and practice. Because of the high demand of electrical power due to rapid development, industrialization and rural electrification; the economic, social and political climate in which the electric power supply industry now operates should be critically viewed to ensure that the production of electrical power should be augmented and remain uninterrupted.

It is against this background that this study intends to make an to make an assessment of power system reliability in Nigeria. The study presents an economic framework that can be used to optimize electric power system reliability. Finally the cost models are investigated to take into account the economic analysis of system reliability, which can be periodically updated to improve overall reliability of electric power system.

.

1.2            PROBLEM STATEMENT

In Nigeria, daily electric power interruption is largely becoming a consistent phenomenon in wide area network of electricity distribution and this is basically due to insufficient power generation, transmission faults and distribution system faults and failures. Unavailability of power supply to customers can occur several times a day and sometimes for weeks and in worst cases for months. There are instances where several interruptions occur in a day especially at the residential loads, which causes untimely failure of home gadgets, darkening of light bulbs, and reduced efficiency and performance of high-power appliances. Damage of electronic devices and burning of light bulbs have also occurred due to over voltages. There are also few cases of deliberate outages due to weather especially rainfall. This is to protect most residential areas from voltage surge that may enter into the power system when lightning occurs owing to the fact that not all residential areas were inspected and certified by the electrical companies when the buildings were completed. Most electrical designs in residential houses are usually not done by professional engineers especially in the middle-class and low-income earner’s settlements.

Considering the fact that the presently installed capacity in Nigeria cannot serve all the customers, it is incumbent that the available power generated be judiciously served with little or no interruptions. That is, when power is generated and available in the system, the distribution subsystem must be up to its task of delivering quality power to the customers. Hence there is the need for the reliability evaluation of a power system in Nigeria.

1.3           AIM AND OBJECTIVES

The aim of this dissertation is to make an assessment of power system reliability in Nigeria. The specific objectives include:

  1. the reliability of each component in the
  2. the overall reliability of the distribution system.
  3. how the substation unavailability contributes to the loss of supply to the customers by interpreting the results obtained after analysis.

1.4 SCOPE OF THE STUDY

This study focused on the assessment of power system reliability in Nigeria. Ayetoro 1 substation, Aguda, Lagos State was chosen to carry out this study.

ASSESSMENT OF POWER SYSTEM RELIABILITY

Sharing is caring!

Leave a Reply