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Razavi, Farzad
- Implementation of Sliding Mode Control in a Full Bridge (DC-DC) Converter
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PDF Views:169
Authors
Affiliations
1 Department of Electrical Engineering, University of Tafresh, Tafresh, IR
2 Department of Electrical Engineering, Science and research branch, Islamic Azad University, Arak, IR
3 Department of Electrical Engineering, Arak University, Arak, IR
1 Department of Electrical Engineering, University of Tafresh, Tafresh, IR
2 Department of Electrical Engineering, Science and research branch, Islamic Azad University, Arak, IR
3 Department of Electrical Engineering, Arak University, Arak, IR
Source
Indian Journal of Science and Technology, Vol 5, No 5 (2012), Pagination: 2665-2672Abstract
Converters are widely used in many fields specially Distributed Generation applications. Because of the non-linear and the uncertain characteristics of DC-DC converters, Sliding Mode Control (SMC), which is robust against uncertainties and disturbances, is implemented in a full-bridge converter in order to control the converter output by varying the duty cycle of the converter. The proposed method is explained and formulated using state-space average model of the fullbridge converter. Additionally, the effects of changing the design parameters of the introduced sliding mode controller in tracking performance and tracking are discussed. Moreover, the system behavior during load and source sudden changes is analyzed. High performance and tracking accuracy of the system under parameter variation are confirmed appropriately using simulations.Keywords
Full-Bridge Converter, Sliding Mode Control, Nonlinear Control, DGFull Text
References
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- Electrical and Economic Study of Applying the ACSS Conductor in TREC Subtransmission Network
Abstract Views :426 |
PDF Views:194
Authors
Affiliations
1 Gharb Niroo Consulting Engineering Company, Tehran, IR
2 Department of Electrical, Computer and Biomedical Engineering, Qazvin Branch, Islamic Azad University, Qazvin, IR
1 Gharb Niroo Consulting Engineering Company, Tehran, IR
2 Department of Electrical, Computer and Biomedical Engineering, Qazvin Branch, Islamic Azad University, Qazvin, IR
Source
Indian Journal of Science and Technology, Vol 6, No 1 (2013), Pagination: 3903-3911Abstract
Increased energy consumption in industrial and commercial subtransmission networks has considerably increased the loading of transmission lines. In order to satisfy consumer demand, this capacity should be increased. Three main ways of increasing capacity are using high-temperature low-sag (HTLS) conductors, increasing the number of bundles, and building new subtransmission lines. This paper is a report on an attempt to increase the power transfer capacity of Tehran Regional Electric Company (TREC) subtransmission network through the above-said methods. For the purpose of re-conductoring, the existing LYNX conductors (ACSR) in the network under study were replaced with equivalent HTLS conductors (ACSS). Calculations were performed for sag tension, current carrying capacity, and electrical parameters. The methods were simulated using DigSilent software for the peak load in the year 2014. The three methods were compared in order to determine which one produces the best results. The comparison took account of the costs associated with power loss and considered technical and economic issues.Keywords
Increasing Current Capacity, HTLS Conductor, Subtransmission Lines, Economic Studies, Tehran Regional Electrical CompanyFull Text
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- Correcting Loose Connections in Distribution Networks from Two Perspectives: Loss Reduction and Power Outage
Abstract Views :207 |
PDF Views:0
Authors
Affiliations
1 Department of Electrical Engineering, Saveh Branch, Islamic Azad University, Saveh, IR
2 Department of Electrical, Computer and Biomedical Engineering, Qazvin Branch, Islamic Azad University, Qazvin, IR
3 Electrical and Computer Engineering, Shahid Beheshti University, Tehran, IR
1 Department of Electrical Engineering, Saveh Branch, Islamic Azad University, Saveh, IR
2 Department of Electrical, Computer and Biomedical Engineering, Qazvin Branch, Islamic Azad University, Qazvin, IR
3 Electrical and Computer Engineering, Shahid Beheshti University, Tehran, IR
Source
Indian Journal of Science and Technology, Vol 7, No 10 (2014), Pagination: 1544-1550Abstract
This paper is a report on an attempt to study fixing loose connections in an actual distribution network in Iran (Qazvin Power Distribution Company) from two angles: reducing loss and minimizing the costs emanating from power outage. The results show that fixing loose connections will only be cost-effective if account is taken of both loss reduction and outage costs. This finding can be used in making appropriate policies on correcting loose connections. This work was fully funded by the Qazvin Electric Distribution Company under contract number 420.Keywords
Correcting Loose Connections, Distribution Network, Loss Reduction, Power OutageFull Text
- Transient Fault Analysis in 63/20 KV Substation
Abstract Views :196 |
PDF Views:0
Authors
Affiliations
1 Department of Electrical Engineering, Islamic Azad University of Qazvin, Qazvin, Iran
2 Technical and Engineering Faculty, Imam Khomeini International University, Qazvin, Iran
1 Department of Electrical Engineering, Islamic Azad University of Qazvin, Qazvin, Iran
2 Technical and Engineering Faculty, Imam Khomeini International University, Qazvin, Iran
Source
Indian Journal of Science and Technology, Vol 10, No 21 (2017), Pagination:Abstract
Objectives: An important field of study concerning power grids is the analysis of different incidents that are taking place in the grid. There are various reasons for such incidents. Realizing the cause of failures and finding solutions to prevent their recurrence can be of great help in grid development planning and also for reducing damages caused by such failures. Methods/Analysis: This paper addresses an incident that took place in a 63/20 KV substation. First we overview the substation and its installed equipment in order to have a comprehensive investigation on the failure and its cause. In the following, simulation process based on available data is described. Findings: We address the failure and how it happened, focusing on the factors intensifying it. Novelty/Improvement: A method is proposed to prevent the recurrence of such failures.Keywords
Power System, Protection, Recovery Voltage, Substation, TransientFull Text