Download or read book Grid Connection of Gotikhel Micro Hydropower Plant Without Interrupting Isolated Load written by Suman Budhathoki and published by GRIN Verlag. This book was released on 2011-11-12 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt: Master's Thesis from the year 2011 in the subject Electrotechnology, grade: 1.7, Brandenburg Technical University Cottbus, course: Electric Power Engineering - Micro Hydro-power and its grid connection, language: English, abstract: 1. Introduction Gotikhel Hydropower Plant (GHP) is one of the nearest Isolated Micro Hydropower Plant (MHP) from the main city out of 650 isolated MHPs available in Nepal which still supplies electrical power to 173 Households, one hull machine and one school. The extension of national grid has made life of MHPs insecure as consumers want the energy from more reliable source i.e. from national grid. In the context of Nepal, especially in rural areas, construction of MHPs are very costly and because of unplanned extension of national grid, some of MHPs are in closing conditions and same cases will continue more in future. So, there is a huge risk in big investments and valuable efforts of villagers. Synchronization of MHPs to the national grid will be the ultimate solution for the existence of MHPs in Nepal. So, this Master Thesis will also focus on grid connection of GHP and consequent impacts on technical as well as financial sectors before and after the grid connection of GHP. 2. Objectives Taking GHP as a private/ community pilot project for grid connection in Nepal, the following objectives of grid-connected MHPs has been generalized: - To ensure optimum use of national resource and fulfill the possible new demand of energy in rural areas since grid connection and Power Exchange Agreement (PEA) allow the Rural Electrification Entity (REE) to sell their excess energy to Nepal Electricity Authority (NEA) grid and the REE can purchase the required energy from the grid when the demand of its members surpass the generation by MHP(s) under it. - To facilitate development of new MHPs by local communities, Individual Power Producers as they can profiteer by selling the excess energy to the grid. - To ensure market for spill energy of MHPs

Download or read book DFIG based Wind Power Conversion System Connected to Grid written by Akshay Kumar and published by GRIN Verlag. This book was released on 2014-08-14 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: Master's Thesis from the year 2014 in the subject Engineering - Power Engineering, grade: 7.8, Ajay Kumar Garg Engineering College, course: M.Tech, language: English, abstract: Wind generation has become the most important alternate energy source and has experienced increased progress in India during the past decade. While it has great potential as an alternative to less environmentally friendly energy sources, there are various technical challenges that cause wind to be considered negatively by many utilities. Wind energy conversion systems suffer from the fact that their real power generation is closely dependent on the local environmental conditions. The Doubly Fed Induction Generator (DFIG) based wind turbine with variable-speed variable-pitch control scheme is the most popular wind power generator in the wind power industry. This machine can be operated either in grid connected or standalone mode. In this thesis, a detailed electromechanical model of a DFIG-based wind turbine connected to power grid as well as separately operated wind turbine system with different sub-systems is developed in the MATLAB/SIMULINK environment and its equivalent generator and turbine control structure is realized. In this regard following configurations have been considered: • DFIG with Battery storage sub-system • DFIG with Buck-Boost converter • DFIG with transformer • DFIG with 3-winding transformer Addition of battery storage and buck-boost converter sub-systems into the system enables not only dispatching of generator power but also decreases the variability in their reactive power requirements. The full control over both active and reactive power is possible by the use of transformer between DFIG and rotor side converter. The steady state behavior of the overall wind turbine system is presented and the steady state reactive power ability of the DFIG is analyzed. It has been shown that major part of the reactive power should be supplied from rotor side converter to reduce the overall rating of the generator. The DFIG with above mentioned sub-systems is connected to grid. The total harmonic distortion analysis and efficiency are carried out. It is found that DFIG with transformer in between machine and rotor side converter has lowest THD (2.29%) and DFIG with 3-winding transformer has maximum efficiency (above 93%).

Download or read book The Prospects of Democracy in Nepal written by Sebastian Erckel and published by GRIN Verlag. This book was released on 2009-05 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: Essay from the year 2008 in the subject Politics - International Politics - Region: South Asia, grade: good, University of Kerala (Department of Political Science), course: Politics of South Asia, language: English, abstract: This essay analyses the chances for democracy in Nepal after the declaration of the Republic of Nepal. This is done by examining earlier experiments with democracy and the reasons for their failure. The main actors of Nepali politics, namely the so- called democratic parties (Nepali Congress and the Left), the Monarchy and the Maoists, receive special attention. South Asia is widely considered to be one of the most volatile regions in the world. In the roughly 60 years since the end of the colonial era the region has witnessed almost all possible types of internal and external conflicts- from wars between states to military takeovers, ethnic insurgencies and social uprisings. While every country was affected, the distinct geographical and cultural features of South Asia contributed to a dangerous interrelatedness of these conflicts. The situation has become even more threatening after both India and Pakistan successfully tested nuclear weapons in 1998. However, the year 2008 has seen some remarkable developments in South Asia that give reason to look at least cautiously optimistic into the future. In Pakistan, elections marked the return to civilian rule, Bhutan experienced its first elections ever, and in Nepal a Constituent Assembly was elected that shortly afterwards abolished the world's last Hindu monarchy by declaring the country a federal and secular republic. Furthermore, the caretaker government in Bangladesh has announced its plans to hold elections at the end of the year. Nonetheless, history indicates that a reversal of these developments cannot be ruled out. It is therefore necessary to evaluate the prospects of democratisation in the light of past events. This paper attempts to assess the chances of a successful democratisation pr