The global solar radiation (GSR) and cloud transmittance factor (cf) are measured at the horizontal surface since 2009 using calibrated CMP6 Pyranometer and NILUUV Irradiance Meter at Pokhara (28.22°N, 83.32°E) which is about 800m from the sea level lying just 20km south of the Himalayas. This paper explains the daily, monthly and seasonal variation of global solar radiation and also compared with temperature and rainfall to global solar radiation. The annual average daily global solar radiation is about 4.81 kWh/m 2 /day which is sufficient to promote solar active and passive solar energy technology at sub-Himalaya terrain Pokhara and other similar geographical locations. The correlation coefficient 0.70 is found in between clearness index (K) and cloud transmittance factor (cf). This novel result can be used for location of similar meteorological and geographical characteristics at which solar data are not available.
The investment in a power system to satisfy the energy needs of its customers must be justified by the reliability worth to the customers. It is therefore very important to obtain a good estimate of the cost of unserved energy in order to determine the appropriate level of investment in the system facilities during system planning. This paper presents the results of a recent customer survey conducted in a developing country to estimate the costs associated with various types of power outages. The results are then used to estimate the cost of energy not served considering different types of customers. The customer's survey for residential, industrial and commercial customer categories in Nepal were carried out in 2008-2010 respectively. Three years of outage data were obtained for two selected feeders in urban, semi-urban and semi-rural areas of Kathmandu valley. The results obtained for the different areas considering the different customer mix are presented in the paper.
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