International Journal of Electrical and Computer Engineering (IJECE)
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Rural Electrification in the Changing paradigm of Power Sector Reforms in India
Get PDFRural electrification is an integral component of poverty alleviation and rural growth of a nation. In India, electricity has not played effective role in the socio-economic growth of village. GDP is increasing with 8 percent where as contribution of agriculture sector is 1.9 percent. Government of India has ambitious target of providing electricity to all villages by 2008 and all rural households by 2012. Steps are already initiated with Rural Electric Corporation, Rural Electricity Supply Technology mission, State Electricity Boards, Reforms in Power Sector. An attempt has been made in this paper to assess the features of rural electrification in India and the problems faced by State Electricity Boards. Challenges of rural electrification in the changing scenario of power sector reforms are identified.DOI:http://dx.doi.org/10.11591/ijece.v2i2.14
Comparison of Performance of SSSC and TCPS in Automatic Generation Control of Hydrothermal System Under Deregulated Scenario
Get PDFThis paper presents the modelling and simulation of Static Synchronous Series Compensator (SSSC) in a two area system for Automatic Generation Control (AGC) under deregulated environment. The modelling of Thyristor Controlled phase Shifter (TCPS) is also carried out and comparison is made between SSSC and TCPS. A two area hydrothermal system under deregulated environment has been considered for this purpose. The devices are modeled and attempt has been made to incorporate these devices in the two area system thus improving the dynamic response of the system. The effect of these parameters on the system is demonstrated with the help of computer simulations. A systematic method has also been demonstrated for the modeling of this component in the system. Computer simulations reveal that due to the presence of SSSC along with TCPS, the dynamic performance of the system in terms of settling time, overshoot is greatly improved than that of without SSSC.DOI:http://dx.doi.org/10.11591/ijece.v1i1.2
Study of Performance of a Power Station for Operational Optimisation
Get PDFUndertaking regular performance analysis of a power station is very much necessary for its operational optimization. In this regard as a case study a 630 MVA, 400/220 kV power station was identified and analysed to study its performance. The study shows that the installed station (transformer) capacity is very large compared to the load it had to supply, and also it is under loaded and underutilized for the major period of its operation. Due to this the operational efficiency of the station was reduced and also the incoming voltage level was higher than the voltage for which the station was designed. During off peak loading condition, one of the 400 kV incoming lines was being tripped, thus risking the supply reliability. This case study emphasizes and suggests few ways for improving the performance and loading pattern of the power station by optimization of its operational parameters. Keywords: Bus reactor; Energy audit; Energy efficiency; Performance analysis; Station capacity.DOI:http://dx.doi.org/10.11591/ijece.v2i1.11
Linguistic Application Using Transitivity-Appraisal Analysis
Get PDFAbstractIn conducting research and linguistic analysis, researchers often find a variety of obstacles because of their limitations as human beings. A large number of articles data that must be processed and calculated increase the risk of error in the analysis, either in error in classification or error in the calculation. That’s why an application is made to assist researchers in conducting their research. This research was provided a specific framework to support the needs analysis process. This program is specifically designed to support the entire process of analysis required by using the method of analysis transivity analysis and assessment, which include searching and data processing articles, clauses classification process, and analytical assessment of this clause. The results of this study are to perform data storage process of said search results of an article, save the data analysis process from an article, the classification of phrase in the sentence in the article, and can minimize risk of calculation errors that occur in analysis. Test carried out using aplha reliability coeficient 0,75 (75%). Keywords: Analyze, Linguistic, Application.DOI:http://dx.doi.org/10.11591/ijece.v1i2.1
Congestion Management in Hybrid Electricity Markets with FACTS Devices with Loadability Limits
Get PDFCongestion management (CM) is one of the most important challenging tasks of the Independent System Operator (ISO) in the deregulated environment. In this paper, generators’ rescheduling based CM approach to manage transmission line congestion considering loadability limit has been presented for hybrid based electricity market model. The main contribution of the paper is (i) to obtain secure transactions for hybrid market model, (ii) optimal rescheduling of generators with loadability limits taken into account with secure transactions, (iii) and impact of FACTS devices on transmission line congestion management. The ISO ensures secure bilateral transactions in a hybrid market model and CM is managed with minimum preferred schedule to obtain minimum congestion cost. The results have been obtained for IEEE 24 bus test system. Keywords: Generator re-dispatch, congestion management, pool electricity market, bid function, loadability limit.DOI:http://dx.doi.org/10.11591/ijece.v2i1.11