Rezaeipour R.,Islamic Azad University at Tabriz |
Kermani S.L.,Electrical Power Distribution Co. |
Alasti N.R.,University of Tehran
2011 International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2011 | Year: 2011
This paper develops the time domain analysis of reference signal for Unified Power Quality Controller (UPQC) device to solve several problems of power quality. The main purpose of this work is to remove two important disturbances including notch and flicker. Simulation of the proposed method was carried out on two sample systems by using Matlab software environment to provide the desirable power quality. © 2011 IEEE.
Akbarpour M.,Islamic Azad University |
Zakrei S.,Islamic Azad University |
Lohi M.,Hormozgan Electrical Power Distribution Company |
Amin Zakrei M.,Electrical Power Distribution Company |
Masoud Mirjalili M.,Hormozgan Electrical Power Distribution Company
Life Science Journal | Year: 2013
Entering alternating rotary electrical machines such as induction motors, electrical drivers industry have changed. They changed so much that despite of DC motor drivers, they had low control. Complicated structures and were used for fixed speed uses. With development of engineering science and the theory of vector control in drive industry, the industry developed basically and gradually they were good substitutions for DC drivers in a wide range. In this paper, we'll study indirect vector control ways. Here, we try to improve the function of this control method by an improving method so that by getting controlling coefficients of drive speed, better results will be got. Genetic which was figured based on the best factors and controlling coefficients of PI set using it, was used in this case which proves the better function of the system. Genetic algorithm considers the decrease of speed error integral and gets proper parameters for PI current controller in different loading conditions.
Youhannaei M.,Electrical power distribution co. |
Honarmand M.E.,Electrical power distribution co. |
Ouni S.,Sharif University of Technology |
Mehri R.,Tavan co. |
And 3 more authors.
IET Conference Publications | Year: 2013
The objective of this work is to study the effects of harmonics on energy meters. This study is canied out based on IEEE 1459 standard through extensive tests on some energy meters installed at Gil an utility consumers. First, a review on IEEE 1459 standard on power definitions will be given. The definitions are then ervaluated for a compact Fluorescent Lamp (CFL) as a harmonic generating load. Then, the results of the performance e\-alnation of two energy meters are presented for different linear and nonlinear loads based on IEEE1459 standard power definitions. Two different test procedures are performed for this putpose. In the first series of tests, a harmonic polluted voltage is applied to a linear resistive load, and the calculated energy values by the energy meters are evaluated.In the second series of tests, the voltage is applied to some nonlinear loads, and the performance evaluation of the energy meters is presented. The precision and correctness of the measured power- quantities are then discussed. Based on IEEE 1459 standard power definitions, it is recommended to use the Non-active power term instead of the reactive power for large consumers.
Abdi Sh.,Imam Khomeini International University |
Afshar K.,Electrical Power Distribution Company |
Ahmadi S.,Electrical Power Distribution Company |
Bigdeli N.,Electrical Power Distribution Company |
Abdi M.,Electrical Power Distribution Company
International Journal of Electrical Power and Energy Systems | Year: 2014
Determination of optimal location of automatic devices such as reclosers and autosectionalizers (R&AS's) for reliability improvement of distribution systems is a combinational and complex problem. In this paper, a methodology based on cost/benefit analysis for optimal R&AS's allocation in distribution systems is proposed. The objective function is considered minimizing the costs of reliability of the distribution systems. Besides, the effect of load types is considered in the optimal R&AS's allocation. A hybrid method based on Improved Particle Swarm Optimization (IPSO) algorithm and Monte Carlo simulation is proposed for solving the problem. The proposed algorithm is applied to the actual 50-bus distribution system in Qazvin-Iran. Numerical studies are representing of the effectiveness of the proposed method. © 2013 Elsevier Ltd. All rights reserved.