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9th Annual International power electronics, Drive systems, and Technologies Conference, PEDSTC 2018

作者： Mousazadeh Mousavi, Seyyed Yousef Jalilian, Alireza Savaghebi, Mehdi School of Electrical Engineering Iran University of Science and Technology Iran Center of Excellence for Power System Automation and Operation Iran University of Science and Technology Iran Department of Energy Technology Aalborg University Denmark

ISBN: (纸本)9781538646977

In this paper, voltage unbalance compensation using DG interfacing inverter is proposed. By using this control method, the DG not only can inject generated power to the grid, but also can compensate the unbalance voltage of the Point of Common Coupling (PCC). A compensation scheme based on negative sequence virtual impedance or admittance is proposed. The control method is designed in stationary reference frame and is based on Proportional-Resonance (PR) controller. The compensation is achieved by using only local measurement. The simulation results in Matlab/Simulink verify the effectiveness of the proposed control method. © 2018 IEEE.

关键词： Simulink

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Fuzzy logic-based load frequency control in a nonlinear deregulated multi-source power system

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2017 International Conference on Artificial Intelligence, ICAI 2017 at 2017 World Congress in Computer Science, Computer engineering and Applied Computing, CSCE 2017

作者： Shayanfar, H.A. Shayeghi, H. Younesi, A. Center of Excellence for Power System Automation and Operation School of Electrical Engineering Iran University of Science and Technology Tehran Iran School of Electrical Engineering University of Mohaghegh Ardabili Ardabil Iran

ISBN: (纸本)9781601324603

In this paper a Fuzzy Logic (FL) based controller called parallel fuzzyP+fuzzyI+fuzzyD is employed to load frequency control (LFC) in a multi-source power system in deregulation environment. To achieve the best performance of the proposed FL based controller, its gains and membership functions have to be tuned carefully. In this paper, the Krill Herd Algorithm (KHA) is used for optimally setting the controller gains. Then the superiority of the proposed KHA optimized FL based controller over a fuzzy PID controller demonstrated. Further to improve the system performance, an Interline power Flow Controller (IPFC) and Redox Flow Batteries (RFB) is considered in the system. Governor Dead Band (GDB), Generation Rate Constraint (GRC), and Time Delay (TD) considered as important physical constraints to get an accurate understanding of LFC problem. The performance of the proposed FL based controller is evaluated under different operating conditions which take place in a deregulated power market and varying system parameters. CSREA Press ©.

关键词： Fuzzy logic

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A Comparison of Electric Motors for Electrical Submersible Pumps Used in the Oil and Gas Industry

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IOP Conference Series: Materials Science and engineering 2018年第1期433卷

作者： M. H. B Bafghi A Vahedi Center of Excellence for Power System Automation and Operation Department of Electrical Engineering Iran University of Science & Technology Tehran Iran

Where the pressure in oil or gas reservoir is not sufficient, in order to increase the production rate, an artificial lift method is required. There are several methods for obtaining artificial lift, including gas injection and electrical submersible pumps. Electrical submersible pumps are more controllable, offer faster installation, and are more economic than other methods, especially for vertical and deviated wells. Electrical submersible pumps systems consist of several parts, including the pump, an electric motor, cables, and a control board. The electric motor plays an important role in an electrical submersible pumps system, and it must produce high torque under high temperature and high-pressure conditions. For small diameter wells, there is also a constraint on the motor diameter. These harsh conditions and constraints require special motors. In this article, the desired criteria for such a motor for this application are represented; then, a comparison is made among several types of motors, including induction motors and various permanent magnet motors, and the resulting best choices are proposed.

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Investigation of Direct & Quadrature Current Effects on Demagnetization of Flux Switching Permanent Magnet Motors

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IOP Conference Series: Materials Science and engineering 2018年第1期433卷

作者： F Mahmouditabar A Vahedi M.H Bafghi Center of Excellence for Power System Automation and Operation Department of Electrical Engineering Iran University of Science & Technology Tehran Iran.

In recent years flux-switching permanent magnet machines have become popular for industrial applications and research, due to advantages such as robustness, high torque, and power density. However, as permanent magnet motors, their performance is affected by demagnetization. It is known, for example, that armature reactions and temperature increases cause permanent magnet demagnetization that leads to power and torque density reduction in motors. In this paper, partially irreversible demagnetization in an flux-switching permanent magnet motor will be investigated using the time stepping finite element method. In addition, the effects of the d and q - axis currents on this type of demagnetization are evaluated by considering several points on the magnets and comparing the flux density of these points with the flux density of the knee point. It is shown that an increase of the q-axis current component increases the machine's demagnetization tolerance.

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Half-Bridge power Quality Conditioner for Railway Traction Distribution system Based on a New Balancing Transformer

Half-Bridge Power Quality Conditioner for Railway Traction D...

引用

Electrical power Distribution Conference

作者： Hossein Mahdinia Roudsari Alireza Jalilian Sadegh Jamali Department of Electrical Engineering Iran University of Science and Technology Tehran 16846-13114 Iran Department of Electrical Engineering Center of Excellence for Power System Automation and Operation Iran University of Science and Technology Tehran 16846-13114 Iran

ISBN: (纸本)9781538669075

In this paper, a novel configuration for the railway traction substation (TSS) is proposed to mitigate the grid-side PQ indices. In order to overcome the mentioned drawbacks of the conventional traction transformer, a new balanced transformer is designed. The new balanced transformer is utilized in a TSS of electrified railway distribution system together with a half-bridge railway PQ conditioner (HBRPQC) to improve the grid-side power factor, and lower the grid-side total harmonic distortion and most importantly the grid-side NSC and NSV. The proposed configuration reduces the total kVA rating of the HBRPQC compared to the conventional TSS comprised of unbalanced traction transformers. The simulation results are presented to validate the performance of the proposed scheme.

关键词： Electrified railway distribution system power quality Traction transformer half-bridge PQ compensator

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A modified DTC with capability of regenerative braking energy in BLDC driven electric vehicles using adaptive control theory

arXiv

引用

arXiv 2017年

作者： Geraee, Shiva Mohammadbagherpoor, Hamed Shafiei, Mehdi Valizadeh, Majid Montazeri, Farshad Feyzi, Mohammad Reza Faculty of Electrical and Computer Engineering University of Tabriz Faculty of Electrical and Computer Engineering North Carolina State University United States Department of Electrical and Electronic Engineering and Computer Science Queensland University of Technology Department of Electrical and Electronic Engineering University of Ilam Center of Excellence for Power System Automation and Operation Electronic Engineering Iran University of Science and Technology

This paper represents a novel regenerative braking approach for the Electric Vehicles. The proposed method solves the short-range problem which is corresponding to the charge of the battery pack. The DTC switching algorithm has been modified to recover the electrical energy from Electrical Vehicle (EV), driven by Brushless DC motor, without using the additional power converter or the other electrical energy storage devices. During regenerative braking process, different switching pattern is applied to the inverter to convert the mechanical energy to the electrical energy through the reverse diodes. This switching pattern is different from the normal operation due to the special arrangement of voltage vectors which is considered to convert the mechanical energy to electrical energy. The state of charge of the battery is used as a performance indicator of the method. Simultaneously, a model reference adaptive system has been designed to tune the system's parameters. Several simulations are carried out to validate the performance and effectiveness of the proposed methods. The results show the high capability and performance of the designed method. Copyright © 2017, The Authors. All rights reserved.

关键词： Brushless DC motors

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Estimation of time to voltage collapse 16

Estimation of time to voltage collapse

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16th International Conference on Environment and Electrical engineering, EEEIC 2016

作者： Khalilifar, M. Joorabian, M. Seifosadat, S. Gh. Shahrtash, S.M. Electrical Engineering Dept. Chamran University Ahvaz Iran Center of Excellence for Power System Automation and Operation Iran University of Science and Technology Tehran Iran

ISBN: (纸本)9781509023196

Finding out remained time to voltage instability occurrence is necessary to make a timely decision on corrective actions. This paper presents a novel method for discovering time to long term voltage instability. The method is based on virtually acceleration of OLTCs' operation during time domain simulation in order to realizing detection of long voltage instability and predicting time to the voltage instability point in reality. The proposed method is applied to Nordic 32, test system for voltage stability analysis. Simulation results show acceptable performance of the proposed algorithm in both speed and accuracy of estimating time to voltage instability. © 2016 IEEE.

关键词： Stability

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PID type stabilizer design using grey wolfe optimization algorithm

PID type stabilizer design using grey wolfe optimization alg...

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2016 International Conference on Artificial Intelligence, ICAI 2016 - WORLDCOMP 2016

作者： Shayanfar, H.A. Shayeghi, H. Younesi, A. Center of Excellence for Power System Automation and Operation School of Electrical Engineering Iran University of Science and Technology Tehran Iran Electrical Engineering Department University of Mohaghegh Ardabili Ardabil Iran

ISBN: (纸本)1601324383

In this paper Grey Wolfe (GW) optimization algorithm is proposed for optimal tuning of PID based stabilizer. The time domain based objective function is considered for the robustly PID parameters tuning problem under a wide range of operating conditions. The optimization problem is solved by the GW Algorithm (GWA) which provides robust and desirable solutions. Results evaluation on a Single Machine connected to Infinite Bus (SMIB) confirm an excellent capability of the GWA based tuned PID to stabilize power system in comparison to the invasive weed optimization based PID controller for different operating conditions. Also, overshoot, undershoot, settling time and some system performance indices are calculated for two PID based stabilizers, and results prove that the proposed GWA method is better than IWA based PID stabilizer. CSREA Press ©.

关键词： Three term control systems

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Improved ABC and fuzzy controller based on consonant FACTS devices

Improved ABC and fuzzy controller based on consonant FACTS d...

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2016 International Conference on Artificial Intelligence, ICAI 2016 - WORLDCOMP 2016

作者： Shayanfar, H.A. Abedinia, O. Amjady, N. Rajaei, Saman Center of Excellence for Power System Automation and Operation School of Electrical Engineering Iran University of Science and Technology Tehran Iran Department of Electric Power Engineering Budapest University of Technology and Economics Budapest Hungary Department of Electrical Engineering Semnan University Semnan Iran

ISBN: (纸本)1601324383

Flexible AC Transmission system (FACTS) devices equipe the probability to control voltages and power flows in a power system and hence to enhance the security of the system. Accordingly, to creat of this possibility, the set amounts of the FACTS controllers have to be selected by appropriate way. In this paper, combination of fuzzy lead-lag control and Improved Artificial Bee Colony (IABC) in multi-machine power system has been proposed which equipped with Thyristor-Controlled Series Capacitor (TCSC) and a Static Var Compensator (SVC). Furthermore, the free parameters of fuzzy controller have been optimized with IABC by considering the time consuming and improving the application of proposed controller structure. To demonstrate the effectiveness of the proposed method multi-machine power system has been considered. CSREA Press ©.

关键词： Flexible AC transmission systems

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Estimation of Time to Voltage Collapse

Estimation of Time to Voltage Collapse

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IEEE International Conference on Environment and Electrical engineering

作者： M. Khalilifar M. Joorabian S. Gh. Seifosadat S. M. Shahrtash Electrical Engineering Dept. Chamran University Ahvaz Iran Center of Excellence for Power System Automation and Operation Iran University of Science & Technology Tehran Iran

ISBN: (纸本)9781509023219

关键词： Long-term voltage instability instability prediction time to instability

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