Iran Power Generation, Transmission and Distribution Management Co.

Tabriz, Iran

Iran Power Generation, Transmission and Distribution Management Co.

Tabriz, Iran

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Ghanaatpisheh M.,Iran Power Generation, Transmission and Distribution Management Co. | Pakaein M.,Iran Power Generation, Transmission and Distribution Management Co.
30th Power System Conference, PSC 2015 | Year: 2015

Gas turbines play an important role in supplying power for the country especially in peak electricity load. The main disadvantages are the turbines, they produce large changes are a result of climate change. However, in times of peak electricity grid and at the same time warm months, can produce gas turbines under the effect of ambient temperature, the amount of reduced considerably. The methods adopted for the turbine compressor inlet air cooling and recovery of their power optimization is necessary. In this paper, different methods of cooling the inlet air to gas turbines for Fars power plants weather conditions and eventually introduced various schemes to install combined cycle gas turbine inlet air cooling system of the plant, good design, Media evaporative air cooler system have been selected according to technical and economic evaluation. Media evaporative air cooler by an external contractor blueprint designed, constructed and installed in the plant. Performance tests are conducted at the site, 11 MW equivalent to 14.5 percent for gas units and 1.2 MW (6.2%) for steam combined cycle unit to the circuit after the Media cooling system in the summer show. © 2015 IEEE.


Shojaeizadeh E.,Islamic Azad University at Yasuj | Veysi F.,Razi University | Yousefi T.,Razi University | Davodi F.,Iran Power Generation, Transmission and Distribution Management Co.
Experimental Thermal and Fluid Science | Year: 2014

The effect of propylene glycol (PG) concentration variation in propylene glycol-water solution at various mass flow rates (0.0167, 0.0333, 0.05. kg/s) on the efficiency of a Flat-plate solar collector was investigated experimentally. The experiments were carried out using 5 different PG concentrations in water including 0%, 25%, 50%, 75%, and 100%. The procedure of ASHRAE standard was applied to test the thermal performance of Flat-plate solar collector. Results indicate that using PG-water at 25% PG concentration in mass flow rate of 0.0167. kg/s reduces the efficiency of the Flat-plate solar collector by 15.68%, compared to that at 0% PG (pure water). Increasing PG volume concentration from 25% to 75% enhances the efficiency of the Flat-plate solar collector and increasing volume concentration from 75% to 100% reduces the maximum efficiency of the Flat-plate solar collector by 8.3%. © 2013 Elsevier Inc.


Arefi A.,Islamic Azad University at Tehran | Olamaei J.,Islamic Azad University at Tehran | Yavartalab A.,Iran Power Generation, Transmission and Distribution Management Co. | Keshtkar H.,Amirkabir University of Technology
Energy Procedia | Year: 2012

The experiences of the loss reduction projects in electric power distribution companies (EPDCs) of Iran are presented. The loss reduction methods, which are proposed individually by 14 EPDCs, corresponding energy saving (ES), Investment costs (IC), and loss rate reductions are provided. In order to illustrate the effectiveness and performance of the loss reduction methods, three parameters are proposed as energy saving per investment costs (ESIC), energy saving per quantity (ESPQ), and investment costs per quantity (ICPQ). The overall ESIC of 14 EPDC as well as individual average and standard deviation of the EISC for each method is presented and compared. In addition, the average and standard deviation of the ESPQs and ICPQs for the loss reduction methods, individually, are provided and investigated. These parameters are useful for EPDCs that intend to reduce the electric losses in distribution networks as a benchmark and as a background in the planning purposes. © 2011 Published by Elsevier Ltd.


Fallahi A.,Iran Power Generation, Transmission and Distribution Management Co. | Ebrahimi R.,Iran University of Science and Technology | Ghaderi S.F.,University of Tehran
Energy | Year: 2011

This paper provides an empirical analysis of the determinants of energy efficiency in 32 power electric generation management companies over the period 2005-2009. The study uses non-parametric Data Envelopment Analysis (DEA) to estimate the relative technical efficiency and productivity change of these companies. In order to verify the stability of our DEA model and the importance of each input variable, a stability test is also conducted. The results of the study indicate that average technical efficiency of companies decreased during the study period. Nearly half of the companies (14) are below this average level of 88.7% for five years. Moreover, it is shown that the low increase of productivity changes is more related to low efficiency rather than technology changes. © 2011 Elsevier Ltd.


Samimi M.H.,University of Tehran | Mahari A.,University of Tehran | Farahnakian M.A.,Iran Power Generation, Transmission and Distribution Management Co. | Mohseni H.,University of Tehran
IEEE Sensors Journal | Year: 2014

The Rogowski coil is an old device for current measurement. It has been modified and improved over a century and is still being studied for new applications. The Rogowski coil has various advantages over conventional magnetic current transformers (CTs). Not only can it be used instead of CT, but also it has various utilizations in other fields. This paper provides a brief review on different aspects of the Rogowski coil and its advancement procedure, during last decades. In this paper, the history of the coil is brifely reviewed and its bases and applications are discussed. The Rogowski coil is analyzed from different points of view, including different integration techniques in the output stage, models for the Rogowski coil, experimental methods for parameter measurement in models, and method for determining the damping resistor. Finally, a brief review over different applications of the coil ends this paper. © 2001-2012 IEEE.


Ehteshami N.,Islamic Azad University at Tabriz | Sathi V.,Iran Power Generation, Transmission and Distribution Management Co. | Ehteshami M.,Razi University
IET Microwaves, Antennas and Propagation | Year: 2012

A novel highly flexible, lightweight square ring circularly polarised microstrip antenna composed of SrTiO3/polyolefin elastomer (POE) composite as substrate material and polypyrrole conductive polymer as radiating patch and ground plane is proposed, designed and fabricated for the first time. Circular polarisation is achieved by truncating the corners of square ring patch. The effect of composite substrate thickness is experimentally studied and antenna parameters are compared with a reference copper antenna. The antenna performance is experimentally studied when it is flexed under different curvature radii. Also its actual performance is investigated when mounted on human body. High frequency structure simulator (HFSS) simulation and measurement results show good performance of the proposed antennas. The polymer/composite antenna is very flexible and lightweight and can be used for flexible/wearable antenna applications. © The Institution of Engineering and Technology 2012.


Bagheri F.,Niroo Research Institute | Mokarizadeh V.,Niroo Research Institute | Jabbar M.,Iran Power Generation, Transmission and Distribution Management Co.
Energy and Buildings | Year: 2013

In this paper, technical procedure for developing energy performance label for office buildings in Iran is presented. According to inappropriate energy consumption indexes of the office buildings in Iran, present research was conducted for this group of buildings. For this purpose, a building energy simulator software tool was developed, validated, and applied to simulate an exhaustive sample society of office buildings. A widespread field activity was conducted to gather the modeling data from 285 office buildings through all the 4 climatic zones in Iran. Moreover, Reference Buildings as the energy efficient buildings were defined and modeled in the software environment. Energy consumption indexes from modeling of sample society and Reference Buildings were applied to conclude the boundaries for grades A-G of the label. Finally, the label appearance was designed and authorized to be applied for both the existent and new buildings. The upper limit for grade A is determined as: 84, 75, 78, and 82 (kWh/Y/m2) and the upper limit of grade G (the failing point) is concluded as: 588, 525, 546, and 574 (kWh/Y/m2) for cold, mild, hot and dry, and hot and wet climatic zones, respectively. © 2013 Elsevier B.V.


Rezaei S.,Iran Power Generation, Transmission and Distribution Management Co.
2015 IEEE 15th International Conference on Environment and Electrical Engineering, EEEIC 2015 - Conference Proceedings | Year: 2015

Catastrophic circumstances and equipment failures in electrical networks are mostly caused by emerging unidentified phenomena. Resonance and Ferroresonance are those phenomena, which have been investigated since, many years ago. Manitoba Hydro 230 kV electrical network has experienced Ferroresonant states several times. Such conditions may occur in effect of short circuit, breaker phase failure, transformer energizing, load rejection, accidental or scheduled line disconnection, and plant outage. One of the significant consequences of resonant and Ferroresonant states can be an apparent mis-operation or tripping some protective devices and inaccurate operation of instrument transformers. In this paper by means of PSCAD/EMTDC simulation software, Ferroresonant states are analyzed in Manitoba Hydro 230 kV network. Ferroresonant states are classified in to adequate modes by Ferroresonance detection tools, furthermore; kinds of protective relays subjected to Ferroresonance are simulated in the power network, and operation of relays is assessed. © 2015 IEEE.


Mandegar M.H.,Iran Power Generation, Transmission and Distribution Management Co. | Saidi B.,Iran Power Generation, Transmission and Distribution Management Co. | Roshanali F.,Iran Power Generation, Transmission and Distribution Management Co.
Interactive Cardiovascular and Thoracic Surgery | Year: 2010

Ascending aorta and aortic arch thrombosis is rare in a young man with no risk factor. Here, we report the case of a young male patient with factor V Leiden mutation who developed ascending aorta and aortic arch thrombosis and subsequent emboli. © 2010 Published by European Association for Cardio-Thoracic Surgery.


Mandegar M.H.,Iran Power Generation, Transmission and Distribution Management Co. | Nazeri I.,Iran Power Generation, Transmission and Distribution Management Co. | Abdi S.,Iran Power Generation, Transmission and Distribution Management Co. | Roshanali F.,Iran Power Generation, Transmission and Distribution Management Co.
Annals of Thoracic Surgery | Year: 2011

Transcatheter aortic valve implantation has become an established alternative treatment method for patients with symptomatic aortic stenosis who are at high risk for conventional aortic valve replacement. Problems, however, persist when using this technique in patients with associated coronary artery disease. We describe a successful case of valve implantation via the transaortic route with simultaneous full revascularization. © 2011 The Society of Thoracic Surgeons.

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