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This paper presents a study the generation development plan of Electricité du Laos (EDL) in the north and central 1 region of the Lao people's democratic republic (Lao PDR). This study considered the 12 hydropower development plan projects, which will be connected to the EDL power grid by using the theories of the power flow analysis (voltage, loading, and power loss) and system reliability assessments...
This paper presents the Reliability Centered Maintenance methodology (RCM) for the maintenance of the distribution system of Phontong substation in Vientiane Capital, which is responsible for Electricité du Laos (EDL). The purposes of this study are distribution system reliability improvement and maintenance activities by using the RCM method. The RCM method has used the power interruption statistical...
This paper presents the development of wide area protection (WAP). The studied case focuses on Vientiane Capital area, Lao PDR. It consists seven substations which are connected the loop network in 22 kV distribution system. The protection system based a characteristic are setting on substation each. The fault area in circuit mainly was affecting the operation of protection, when has occurred a fault...
this paper, is a study on the planning and development of the electricity distribution system to supporting economic and society growth in Luangprabang, from the year 2015 -2025, and to reliability improvement of the electricity distribution system in Luangprabang branch, based on the rate economic and social growth. This study also the examined the rate of return on investment (economic rate of return,...
This work presents the reliability improvement of the electrical distribution system of the Thanaleng substation, by simulation analysis using the DIgSILENT Power Factory program. The study considered the outages in the distribution network from temporary and permanent faults. Consequently, outages frequently will directly affect commercial and private electrical consumption. Outages also deteriorate...
This research is aimed to present technical loss analysis in Vientiane capital. Electricité du Laos (EDL), the state enterprise company that is responsible for transmission and distribution of electricity in Lao People's Democratic Republic (Lao PDR). The purposes of this research studies are technical line losses and reduce power losses of distribution in Vientiane capital by using CYMDIST program...
This work is concerned with hydropower scheduling procedure, applied from economic dispatch problems, to determine the optimal operation scheduling of Nam Ngum-1 and Nam Leuk hydropower plants. The hydropower plant was formulated as a nonlinear optimization problem and solved by using the modified lambda iteration method. This objective function was considered to minimize water discharge rate by using...
Electricity is one of not only the most necessities for the daily life activities of people, but also the major driving force for economic growth and development of every country. Due to the unstorable nature of electricity, the adequate supply of electricity has to be always available and uninterruptible to meet the intermittently growing demand. This paper is proposed Neural Networks (NN) with Backpropagation...
The interaction between a fault arc and the power system has a big influence on evaluation of successful reclosing of a faulted system. In this paper, the single phase reclosing performance of the system is considered using Thailand 500 kV transmission system between Mae Moh and Tha Ta Ko substations as examples. The work has been investigated using simplified arc model. The study has used EMTP simulation...
This paper investigates the overvoltage due to different types of switching in Nam Theun 2 - Roi Et 2 500 kV network. The study is based on PSCAD/EMTDC performed for a guide line for 500 kV operations in Lao PDR. The appropriate representation for the various components such as transformer, transmission line, circuit breaker, surge arrestor and shunt reactor, have been selected. The study covers two...
Single phase switching has become an increasingly more viable approach to the operation of EHV systems in recent years. Indeed, single phase reclosing, if successful, represents a significant step in improving system performance and is an attractive, economical means of obtaining acceptable transient stability with fewer lines. Single phase reclosing has the additional benefits of reducing switching...
Successful operation of a power system depends largely on the ability to provide reliable and uninterrupted service to the loads. Single phase switching has become an increasingly more viable approach to the operation of EHV systems in recent years. Indeed, single phase reclosing, if successful, represents a significant step in improving system performance and is an attractive, economical means of...
This paper presents an investigation of single pole reclosing on EHV transmission lines in Thailand. The reactor compensation of single pole switching on both single and double circuit lines is reviewed. The existing EHV line is simulated. At the boundary of the simulation, the external grid was represented by positive/zero sequence equivalent impedances. All simulations were done with EMTP. Methods...
This paper describes a study of single pole reclosing on 500 kV transmission lines in the Electricity Generating Authority of Thailand (EGAT) system. The work has been prepared to adopt for successful single pole reclosing. The paper covers area such as single-phase tripping, auto-reclosing, methods of secondary arc extinction and related system requirements. The EGAT 500 kV system is simulated. At...
Overvoltages analysis in electric transmission system causes by switching and lightning surges and outage events involves modeling and the use of transient program as well as condition of electric operation such as energisation and other system performance, electric generating authority of Thailand (EGAT) and Thai universities have been collecting field data and making case study analysis up to 500...
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