Abstract
Modern electrical power systems have the responsibility of providing a reliable and economic supply of electrical energy to their customers. The economic and social effects of loss of electric service can have significant impacts on both the utility supplying electric energy and the end users of the service. Maintaining a reliable power supply is a very important issue in power system design and operation .The developing country including Nepal more often does not follow the modern planning criteria for system planning due to which we have to face problems like load shedding. This work is an exercise to detail reliability analysis of INPS using different reliability indices. The INPS has been divided into three regions and the reliability indices are found separately for each region. The two reliability indices LOLE and EENS are found to check the adequacy of generation. The load data and generation data used are all real from the only one utility of Nepal, NEA. The calculations are done according to the theory of reliability of power system on MATLAB programming. The results obtained in this work are quite satisfactory and represents the present condition of INPS.
Highlights
A power system serves one function only and that is to supply customers both large and small with electrical energy as economically and as reliable as possible
As shown in above table, among the different indices loss of load expectation (LOLE) and energy not served (EENS) are evaluated in this paper
Loss of Load Probability (LOLP) is a projected value of how much time, in the long run, the load on a power system is expected to be greater than the capacity of the available generating resources
Summary
A power system serves one function only and that is to supply customers both large and small with electrical energy as economically and as reliable as possible. Because of its pattern of social and working habit, has come to expect the supply to be continuously available on demand. This is not easy physically in reality due to random system failures which are generally outside the control of power system engineers. Today Nepal is facing a severe load shedding problem due to shortage of power generation. It seems that somewhere there is lack of proper planning. In this paper the work done to analysis the reliability of Integrated Nepal Power System is presented. The data taken are all real from Nepal Electricity Authority (NEA)
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