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Supplying electrical energy to the load on demand, economically and with acceptable levels of reliability and service quality is the main task of a distribution system. Energy distribution reliability is important in the competition conditions in electricity markets because consumers directly supply energy. Therefore, it is not enough to estimate how reliable the distribution system is at present...
A power balance between supply and demand is essential for reliable and stable operation of power grids. The mismatch between supply and demand causes the frequency deviations which results in malfunction of most of the electrical devices. Moreover, it affects the system stability resulting in system blackouts as that of USA, in 2003. For decades the balancing of supply and demand was based on generation...
Closed-ring operation of distribution systems has several advantages over radially-operated ones. Closed-ring achieves availability of power on demand, reduce grid losses and maintain the reliability at acceptable level. This paper evaluates the reliability of 6-bus closed-ring operated network based on total loss of continuity criterion. The results show dramatically improvement in reliability of...
In the deregulated power industry, effective procurement of the Ancillary Services (AS) is essential in order to both reliable supply to customer and power system security. AS are used in order to operate the system reliably within enterprise safety along with the criteria regarding supply quality and operating conditions. Demand decrease set Spinning Reserve (SR) for power systems and capital cost...
Large scale megawatt wind farms like the Adama wind farm and Ashegoda is being integrated into the Ethiopian Electric Power System. The location of Adama wind farm is about 95 km from Addis Ababa (the capital city of Ethiopia) and 3km from Adama town, with an altitude elevation of 1824∼1976m. The central geographical position of the wind farm is 39°13′48″E, 8°32′41″N. The Adama wind farm has two parts...
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