Theoretical and Practical Aspects of Implementing a Low Voltage Express Feeder between Nearby Distribution Transformers to Reduce Annual Losses

2017-04-21
KAS, Naile
TOR, Osman Bulent
CEBECI, Mahmut Erkut
GOKTEPE, Melih
KALKAN, Emrah
YILMAZ, Seyit Cem
Güven, Ali Nezih
GUNDOGDU, Askin
Capacity of distribution transformers is usually determined based on peak demand forecasted along a planning period. Peak demand actualizes at different seasons depending on the load characteristics of the transformers. For example, transformers at coastal towns essentially experience peak demand during summer periods. Although such transformers are loaded up to their capacities at summer seasons, their loading level reduces drastically during the off-season periods. This study addresses technical losses of such transformers and presents a solution to reduce the total transformer losses by means of implementing a low voltage express feeder (LVEF) between transformers close by. Total load of two nearby transformers is supplied by only one of the transformers through the LVEF while the other transformer is de-energized during off-season period. Depending on the criteria addressed in this study, this approach enables a decrease in the annual total loss of the system. Study includes a pilot implementation on-site.

Suggestions

Implementation of low voltage express feeder (LVEF) to reduce of no-load losses of distribution transformers which suffer high seasonal load deviation
Tor, Osman Bulent; CEBECI, Mahmut Erkut; KAS, Naile; GOKTEPE, Melih; KALKAN, Emrah; YILMAZ, Seyit Cem; GUNDOGDU, Askin; Güven, Ali Nezih (2018-01-01)
This study presents design, technical and economic feasibility analysis, and on-site implementation of low voltage express feeder (LVEF) implementation, which is aimed to reduce off-season technical losses of transformers located at the regions dominated by summerhouses along the Mediterranean Coast. Capacities of such transformers are generally determined considering peak demand during summer season. LVEF implementation is based on the concept of connecting close by transformer couples through an LVEF cabl...
Evaluation of performance and optimum valve settings for pressure management using forecasted daily demand curves by artificial neural networks
Yıldız, Evren; Merzi, Nuri; Department of Civil Engineering (2011)
For the appropriate operation and correct short term planning, daily demand curve (DDC) of municipal water distribution networks should be forecasted beforehand. For that purpose, artificial neural networks (ANN) is used as a new method. The proposed approach employs already recorded DDCs extracted from the database of ASKI (Ankara Water Authority) SCADA center and related independent parameters such as temperature and relative humidity obtained from DMI (State Meteorological Institute). In this study, a co...
AN IMPROVED CORRELATION FOR ESTIMATING SOLAR-RADIATION FROM BRIGHT SUNSHINE DATA FOR TURKEY
TASDEMIROGLU, E; Sever, Ramazan (Elsevier BV, 1991-01-01)
The following quadratic equation was previously developed to estimate the monthly average solar radiation in any place in Turkey: = a + b tc {sup 2} where is the ratio of the monthly averages of the bright sunshine to the length of the day, a and b are constants that depend on location. The measured solar radiation and bright sunshine data from two stations, totalling 1842 days, were used to evaluate the constants. In 1982 the State Meteorological Office of Turkey started solar radiation measurements in six...
Allocation of Hourly Reserve Versus Demand Response for Security-Constrained Scheduling of Stochastic Wind Energy
Sahin, Cem; Shahidehpour, Mohammad; Erkmen, İsmet (2013-01-01)
This paper presents a stochastic method for the hourly scheduling of optimal reserves when the hourly forecast errors of wind energy and load are considered. The approach utilizes the stochastic security-constrained unit commitment (SCUC) model and a two-stage stochastic programming for the day-ahead scheduling of wind energy and conventional units with N - 1 contingencies. The effect of aggregated hourly demand (DR) response is considered as a means of mitigating transmission violations when uncertainties ...
Optimization of energy production from an underground gas storage reservoir
Sınayuç, Çağlar; Kucukeksi, MS (2000-06-01)
The aim of this study is to supply the variable gas demand from an underground gas storage reservoir during heating season by an optimal selection of production rates. Because of the interaction of many influences, parameters, and previous decisions, determination of production rates becomes so involved that the manager can no longer use intuitive judgment. The objective, therefore, is to reach an optimum decision by applying the linear programming method in problem optimization.
Citation Formats
N. KAS et al., “Theoretical and Practical Aspects of Implementing a Low Voltage Express Feeder between Nearby Distribution Transformers to Reduce Annual Losses,” 2017, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/48239.