Record Details     « New Search       Brief Record Full Record MARC Record     Bibliographic Data Control Number UPD-00000484819 Date and Time of Latest Transaction 20090717032928.0 General Information 011002s2000 xx 000 0 eng Cataloging Source DML Language Code eng Local Call Number LG 995 2000 E64 R65 Main Entry - Personal Name Rojo, Marlon Gan Title Statement Optimizing reactive power compensation for unbalanced distribution feeders with fixed and switched capacitors / Marlon Gan Rojo Physical Description xv, 309 leaves : ill Summary, Etc. The study aims to improve the economic performance of three-phase unbalanced distribution systems by optimizing reactive power compensation using fixed and switched shunt capacitors. The study focuses on the characteristics of rural electric cooperative distribution systems. These systems are characterized by unbalanced loading and unbalanced circuit configuration. Single-phase distribution transformers which frequently are found singly at the various load points contribute to unsymmetrical loading. The presence of V-phase or single-phase circuits and the incomplete transposition of three-phase lines give rise to an unbalanced system circuit configuration. Most of these systems use only fixed capacitors while a number of studies have indicated the economics of using a combination of fixed and switched capacitors. Previous works have dealt with the reduction of energy loss in primary distribution feeders using shunt capacitors with one or more simplifying assumptions. These assumptions include the following: zero or linear capacitor cost, continuous capacitor size, uniform capacitor sizes, pre-specified number of capacitors, capacitors are of fixed type only, pre-specified relative positions of the switched and fixed capacitors, constant capacitor output current, simplified equivalent feeder, uniform cross-section feeder, constant load, uniformly distributed reactive load, reactive compensation affects only the reactive component component of the current, constant voltage profile along the feeder, balanced three-phase networks with balanced load, and no mutual coupling effect between conductors. To optimize the savings from the use of fixed and switched capacitors, several studies employ the simplifying assumption that the system is balanced. However, if capacitors are sized and located based on a balanced system, the solution could be suboptimal when applied to the unbalanced system. In order to obtain results of greater accuracy and achieve a cost-effective reactive power compensation for rural electric cooperative distribution systems, the imbalance and other practical characteristics of distribution primary feeders are considered, the possible use of switched capacitors in combination with fixed capacitors investigated, and the investment and operation costs of capacitors accounted for. With these considerations, the study develops for three-phase unbalanced distribution systems a methodology for optimizing reactive power compensation. The optimization methodology includes the determination of the optimal location, size, number, and switching-on time of shunt capacitors with economic benefit as the objective function. A three-phase power flow analysis program is integrated into the implementation of the methodology Subject Added Entry - Topical Term Reactive power (Electrical engineering)   Switched capacitor circuits   Electric power distribution -- Multiphase Collection Category FI Location UP DARCHIVES LG 995 2000 E64 R65 Room-Use Only UARD-9550T   UP DENG-II LG 995 2000 E64 R65 E2000000392 Room-Use Only E2-91T Collection Category UP Location UP DARCHIVES LG 995 2000 E64 R65 Room-Use Only UARD-9550T   UP DENG-II LG 995 2000 E64 R65 E2000000392 Room-Use Only E2-91T Textual Physical Form Designator Thesis           Physical Location University of the Philippines Diliman Main Library: University Archives LG 995 2000 E64 / R65 Diliman: College of Engineering Library II LG 995 2000 E64 / R65           Digital Copy Not Available          Add to Book Cart  |   Download MARC