Annual Report 2011-2012

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Annual Research Report 2011-2012 Project Results: • Reliability increasing through reduction of grounding transformer failures • Reduction of operation and maintenance expenses of high voltage substations • Preventing similar failures in high voltgae substations • Providing proper operation and maintenance instructions for grounding transformers Project Documentation: • Technical Reports ”An Investigation on Grounding Transformer Failures in Zanjan Regional Electric Company (ZREC) Substations and Presenting Applicable Solutions for Prevention of this Problem”, Transmission & Substation Department, T&D research center, NRI, 2009-2011 65
Annual Research Report 2011-2012 Project Title: Optimal Design & Development of Jam-e-Jam Power Distribution Network Department: Substation and Transmission Employer: Islamic Republic of Iran Broadcasting (IRIB) Project Manager: H. Ghadiri Project Code: CTQIB04 Project Staff: S. Khayamim, M.Givanejad, M.Shariati, S. Farzalizadeh, P. Hasanpour Project Summary: Economical loss reduction, solving current unbalancing problems, balancing transformer loads, decreasing LV feeders maintenance costs compare with increasing transformers maintenance costs and eliminating voltage drop in long LV feeders are some of the benefits of optimizing design and development of power distribution networks which ultimately leaded to network improvement from reliability and economical point of view. Therefore, a consulting project is done to optimize design & development of Jam-e-Jam power distribution network. At the fist, the required information such as Jam-e-Jam distribution network data and its development plan, source feeder's data and upstream HV network were prepared and documented. Also for load estimation and forecasting the personnel experiments and knowledge about the cable paths and load locations, existed loading data, load data which measured with 20 digital meters –their placement, installation and application was done in this project- has been used. According to this, the existed Jam-e-Jam network based on the gathered data and documents was simulated and analyzed in CymeDist software and the loss of existed network was studied. Optimal design of Jam-e-Jam is done by applying DisPlan software to remove nonstandard network and reduce network loss. 66
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Annual Report 2011-2012

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