Nepal’s main electricity generation is guaranteed through hydro-electrical power plants. However in more remote areas of the country the electricity supply is covered by island grids and the available capacity of the plants is not enough to satisfy the demand of the population in times of peak load. In addition, due to missing storage techniques and regulation systems, the power quality in these areas is far below western world standards. The objective of this thesis was to record and analyze power quality data in off and on grid locations in Nepal. For that, on-site measurements in two different villages in the Manang district of Nepal and the capital city Kathmandu were performed. In addition, an on grid power quality measurement was conducted in Munich. At each location, the data was recorded over a one week period. The measurements consist of the power quality criteria voltage, frequency and sine wave-form and were stored at ten-second intervals by a number of different analyzing devices, including a self-built datalogger. For rural areas, the deviations from the nominal values were extremely high in contrast to the data collected in Kathmandu. As a next step, the influence of variations in frequency and voltage on typical Nepali electrical appliances were investigated from a consumer standpoint in a laboratory test set-up. The output parameters of resistive loads were affected the most by voltage deviations below the nominal voltage. Frequency deviations had no mentionable impact on the output variables of the tested electrical appliances. The examined switch mode power supply appliances were immune to voltage and frequency variations from a consumer standpoint. However, they could have a negative effect on the purity of the supply voltage sine wave form in the power system, as they impose harmonic distortions on the electrical network. Based on the collected data, the power quality in Nepal can be classified and a conclusion about the response of various electrical appliances to variations in power quality can be made.     «

Nepal’s main electricity generation is guaranteed through hydro-electrical power plants. However in more remote areas of the country the electricity supply is covered by island grids and the available capacity of the plants is not enough to satisfy the demand of the population in times of peak load. In addition, due to missing storage techniques and regulation systems, the power quality in these areas is far below western world standards. The objective of this thesis was to record and analyze...     »