This page has only limited features, please log in for full access.
In this paper, to solve the hard-switching operation problem and the lack of existing a bidirectional power flow path from output to the energy storage device of the conventional three-port converter, a new soft-switched bidirectional multi-port converter is proposed. A large number of switches, different power flow paths which vary in each operating mode, and changing the outputs and their power levels are some of the challenges to provide soft-switching conditions in multi-port converters. In the proposed converter, by changing the topology of the conventional three-port converter, the bidirectional power exchangeability between ports is provided. Moreover, a soft-switching cell is added, which can operate independently from the output power levels. Less number of components with low volume is one of the important features of this multi-port converter. Due to the soft-switching operation of the proposed converter, the size of passive components and heat-sink is reduced. In addition, by the use of coupled inductors in the soft-switching cell, only one magnetic core is used and thus, single-stage power conversion is achieved and conduction loss is reduced. In this paper, the converter operating modes are presented, and design considerations are discussed. Finally, a 200 W–200 V prototype is implemented, and the theoretical analysis is validated by the experimental results.
Rasoul Faraji; Lei Ding; Tohid Rahimi; Hosein Farzanehfard; Hossein Hafezi; Mohammad Maghsoudi. Efficient Multi-Port Bidirectional Converter With Soft-Switching Capability for Electric Vehicle Applications. IEEE Access 2021, 9, 107079 -107094.
AMA StyleRasoul Faraji, Lei Ding, Tohid Rahimi, Hosein Farzanehfard, Hossein Hafezi, Mohammad Maghsoudi. Efficient Multi-Port Bidirectional Converter With Soft-Switching Capability for Electric Vehicle Applications. IEEE Access. 2021; 9 ():107079-107094.
Chicago/Turabian StyleRasoul Faraji; Lei Ding; Tohid Rahimi; Hosein Farzanehfard; Hossein Hafezi; Mohammad Maghsoudi. 2021. "Efficient Multi-Port Bidirectional Converter With Soft-Switching Capability for Electric Vehicle Applications." IEEE Access 9, no. : 107079-107094.
Control of battery energy storage systems (BESS) for active network management (ANM) should be done in coordinated way considering management of different BESS components like battery cells and inverter interface concurrently. In this paper, a detailed and accurate lithium‐ion battery model has been used to design BESS controls, thereby allowing improved overall power system control design optimisation studies by simultaneously considering both component and system‐level aspects. This model is utilised to develop a multi‐objective ANM scheme (a) to enhance utilisation of wind power generation locally by means of active power (P)‐ control of BESSs; (b) to utilise distributed energy resources (i.e. BESS and wind turbine generators) to maintain system voltage within the limits of grid code requirements by reactive power/voltage (QU)‐ and active power/voltage (PU)‐ controls. BESS control strategies to implement the ANM scheme, are designed and validated through real‐time simulation in an existing smart grid pilot, Sundom Smart Grid (SSG), in Vaasa, Finland.
Chethan Parthasarathy; Katja Sirviö; Hossein Hafezi; Hannu Laaksonen. Modelling battery energy storage systems for active network management—coordinated control design and validation. IET Renewable Power Generation 2021, 15, 2426 -2437.
AMA StyleChethan Parthasarathy, Katja Sirviö, Hossein Hafezi, Hannu Laaksonen. Modelling battery energy storage systems for active network management—coordinated control design and validation. IET Renewable Power Generation. 2021; 15 (11):2426-2437.
Chicago/Turabian StyleChethan Parthasarathy; Katja Sirviö; Hossein Hafezi; Hannu Laaksonen. 2021. "Modelling battery energy storage systems for active network management—coordinated control design and validation." IET Renewable Power Generation 15, no. 11: 2426-2437.
In this paper, a new single-phase seven level inverter with reduced device count is introduced. The structure can boost the input voltage by synthesizing the capacitors’ voltages in predetermined current paths. A single DC voltage source is utilized to generate the output AC staircase waveform, which is facilitated via Nearest Level Control. Self-voltage balancing ability, less number of semiconductor devices, high efficiency and control simplicity are the most significant inherent attributes of the proposed circuit. It is also noticeable that in this configuration neither bulky transformer/inductor nor filters are applied. Power loss calculation and required capacitance of the proposed inverter are investigated and theoretical efficiency of 93.31% was reached. Moreover, the proposed converter operates under various load conditions with lower Total Harmonic Distortion compared to recent topologies. Ultimately, operating principles of the proposed D-Type seven-level Inverter and simulation results in MATLAB SIMULINK environment are validated by experimental ones obtained from the laboratory prototype.
Erfan Azimi; Aliakbar Tavasoli; Hossein Hafezi; Alireza Nateghi. A Dumbbell Type (D-Type) multilevel inverter based on switched capacitor concept. International Journal of Electronics 2021, 1 -17.
AMA StyleErfan Azimi, Aliakbar Tavasoli, Hossein Hafezi, Alireza Nateghi. A Dumbbell Type (D-Type) multilevel inverter based on switched capacitor concept. International Journal of Electronics. 2021; ():1-17.
Chicago/Turabian StyleErfan Azimi; Aliakbar Tavasoli; Hossein Hafezi; Alireza Nateghi. 2021. "A Dumbbell Type (D-Type) multilevel inverter based on switched capacitor concept." International Journal of Electronics , no. : 1-17.
Electric power systems are facing tremendous changes and power electronic devices are playing an increasingly crucial role in this transformation. In this contest, the study of power electronic devices behavior becomes of the utmost importance, and in particular, evaluation of their losses to understand their performance. Several methods can be found in literature to evaluate power or energy losses, but each of them is associated with shortcomings (such as missing an important factor or having narrow current or voltage range) that in practice become a strong limit to implement them or in a simulation process. To overcome this problem, this paper evaluates existing methods and proposes new loss calculation methods for power electronics losses that can be used within simulation tools at any converter configuration and application range, splitting power electronic losses into switching and conduction losses. The proposed new approach formulates each loss calculation procedure in a systematic way. The presented methods are implemented in Matlab Simulink and simulation results are compared with data obtained from the Semikron SemiSel v4 online tool, which is used as a benchmark. The outcomes reveal that, with this new approach, the proposed methods can cover wider working operation range compared to the existing methods having better accuracy.
Hossein Hafezi; Roberto Faranda. A New Approach for Power Losses Evaluation of IGBT/Diode Module. Electronics 2021, 10, 280 .
AMA StyleHossein Hafezi, Roberto Faranda. A New Approach for Power Losses Evaluation of IGBT/Diode Module. Electronics. 2021; 10 (3):280.
Chicago/Turabian StyleHossein Hafezi; Roberto Faranda. 2021. "A New Approach for Power Losses Evaluation of IGBT/Diode Module." Electronics 10, no. 3: 280.
The main objective of this paper is to present a comprehensive review of soft open point (SOP), an emerging power electronics technology to maximize future distribution networks’ (DNs) resiliency and flexibility as well as increase hosting capacity for distributed energy resources like photovoltaics and electric vehicles. The SOP is currently an active area of research and ongoing development of new control techniques for SOP and optimization algorithm for the optimal use of SOP in DNs produces new techniques until DN operators use it comprehensively in their systems. The motivation for this work is to present the research that has been completed for the SOP and summarize the duties of SOP in DNs according to the literature and propose advanced duties for SOP according to modern standards. Finally, future research directions are mentioned to pave the way for research in the coming years to drive the DNs towards more flexibility and ‘Robust’ from controllability, stability, and protection structure point of view.
Khaled Syfullah Fuad; Hossein Hafezi; Kimmo Kauhaniemi; Hannu Laaksonen. Soft Open Point in Distribution Networks. IEEE Access 2020, 8, 210550 -210565.
AMA StyleKhaled Syfullah Fuad, Hossein Hafezi, Kimmo Kauhaniemi, Hannu Laaksonen. Soft Open Point in Distribution Networks. IEEE Access. 2020; 8 (99):210550-210565.
Chicago/Turabian StyleKhaled Syfullah Fuad; Hossein Hafezi; Kimmo Kauhaniemi; Hannu Laaksonen. 2020. "Soft Open Point in Distribution Networks." IEEE Access 8, no. 99: 210550-210565.
Future smart grids will be more dynamic with many variabilities related to generation, inertia, and topology changes. Therefore, more flexibility in form of several active and reactive power related technical services from different distributed energy resources (DER) will be needed for local (distribution network) and whole system (transmission network) needs. However, traditional distribution network operation and control principles are limiting the Photovoltaic (PV) hosting capacity of LV networks and the DER capability to provide system-wide technical services in certain situations. New active and adaptive control principles are needed in order to overcome these limitations. This paper studies and proposes solutions for adaptive settings and management schemes to increase PV hosting capacity and improve provision of frequency support related services by flexible energy resources. The studies show that unwanted interactions between different DER units and their control functions can be avoided with the proposed adaptive control methods. Simultaneously, also better distribution network PV hosting capacity and flexibility services provision from DER units even during very low load situations can be achieved.
Hannu Laaksonen; Chethan Parthasarathy; Hossein Hafezi; Miadreza Shafie-Khah; Hosna Khajeh; Nikosnh Hatziargyriou. Solutions to Increase PV Hosting Capacity and Provision of Services from Flexible Energy Resources. Applied Sciences 2020, 10, 5146 .
AMA StyleHannu Laaksonen, Chethan Parthasarathy, Hossein Hafezi, Miadreza Shafie-Khah, Hosna Khajeh, Nikosnh Hatziargyriou. Solutions to Increase PV Hosting Capacity and Provision of Services from Flexible Energy Resources. Applied Sciences. 2020; 10 (15):5146.
Chicago/Turabian StyleHannu Laaksonen; Chethan Parthasarathy; Hossein Hafezi; Miadreza Shafie-Khah; Hosna Khajeh; Nikosnh Hatziargyriou. 2020. "Solutions to Increase PV Hosting Capacity and Provision of Services from Flexible Energy Resources." Applied Sciences 10, no. 15: 5146.
In industrial applications, among several varieties of semiconductor devices available, a silicon-controlled rectifier (SCR) is often used in managing and protecting various systems with different applications. Hence, it is of the utmost importance to design a control system which can operate over a range of electrical loads without any modifications in its hardware and/or software. This paper analyzes and investigates in detail the power circuit effects on conduction delay and SCR functioning. Moreover, two different commonly used driving systems for SCR application have been introduced, discussed, and evaluated. Concerning driving systems, here, three aspects have paramount importance and are consequently taken into consideration, namely the driver system losses, the conduction delay, and in particular, some power quality indices. The conduction delay is a parameter of great importance, as being able to control and reduce it to the minimum allowed by the application can bring significant practical advantages (both in terms of application and economic terms, as better summarized in the article). Theoretical analysis has been performed, followed and verified by simulation studies and, for some cases, laboratory experimental test results are presented which provide credibility to the study.
Roberto Faranda; Hossein Hafezi; Kishore Akkala; Massimo Lazzaroni. AC “Back to Back” Switching Device in Industrial Application. Energies 2020, 13, 3539 .
AMA StyleRoberto Faranda, Hossein Hafezi, Kishore Akkala, Massimo Lazzaroni. AC “Back to Back” Switching Device in Industrial Application. Energies. 2020; 13 (14):3539.
Chicago/Turabian StyleRoberto Faranda; Hossein Hafezi; Kishore Akkala; Massimo Lazzaroni. 2020. "AC “Back to Back” Switching Device in Industrial Application." Energies 13, no. 14: 3539.
Power Quality (PQ) improvement in distribution level is an increasing concern in modern electrical power systems. One of the main problems in LV networks is related to load voltage stabilization close to the nominal value. Usually this problem is solved by Smart Distribution Transformers, Hybrid Transformers and Solid-state Transformers, but also Dynamic Voltage Conditioner (DVC) can be an innovative and a cost effective solution. The paper introduces a new control method of a single-phase DVC system able to compensate these long duration voltage drifts. For these events, it is mandatory to avoid active power exchanges so, the controller is designed to work with non-active power only. Operation limits for quadrature voltage injection control is formulated and reference voltage update procedure is proposed to guarantee its continuous operating. DVC performance for main voltage and load variation is examined. Proposed solution is validated with simulation study and experimental laboratory tests. Some simulation and experimental results are illustrated to show the prototype device's performance.
Hossein Hafezi; Roberto Faranda. Dynamic Voltage Conditioner: A New Concept for Smart Low-Voltage Distribution Systems. IEEE Transactions on Power Electronics 2017, 33, 7582 -7590.
AMA StyleHossein Hafezi, Roberto Faranda. Dynamic Voltage Conditioner: A New Concept for Smart Low-Voltage Distribution Systems. IEEE Transactions on Power Electronics. 2017; 33 (9):7582-7590.
Chicago/Turabian StyleHossein Hafezi; Roberto Faranda. 2017. "Dynamic Voltage Conditioner: A New Concept for Smart Low-Voltage Distribution Systems." IEEE Transactions on Power Electronics 33, no. 9: 7582-7590.
Power Quality (PQ) and Custom Power (CP) are two different terms in electric power system. PQ is the definition of a unique standard which the distribution system operators (DSO) should respect precisely. The DSO can manage its network to address the PQ issues but the result could satisfy only some end users requirements while others could need to improve their voltage profile. Therefore, the custom needs can be not completely satisfied by this standard and with the term CP we define the end user needs. This paper presents PQ and CP definitions and tries to find a possible common solution for DSO and final users in a contest where power electronics play an important role. Indeed in this new concept of distribution electricity network, as application in smart grid, there is a huge diffusion of renewable energy sources and storage systems. In this contest a solution able to provide economic benefits to DSO and end users needs to be found.
H. Hafezi; R. Faranda. Power quality and custom power: Seeking for a common solution in LV distribution network. 2017 IEEE International Conference on Environment and Electrical Engineering and 2017 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe) 2017, 1 -6.
AMA StyleH. Hafezi, R. Faranda. Power quality and custom power: Seeking for a common solution in LV distribution network. 2017 IEEE International Conference on Environment and Electrical Engineering and 2017 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe). 2017; ():1-6.
Chicago/Turabian StyleH. Hafezi; R. Faranda. 2017. "Power quality and custom power: Seeking for a common solution in LV distribution network." 2017 IEEE International Conference on Environment and Electrical Engineering and 2017 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe) , no. : 1-6.
Electric energy is the cleanest and more efficient energy type that is being transmitting and distributing among end users. From early evolution, ac distribution was selected as better, from economic point of view, solution for transmission and distribution purpose. However last technological development in electronic device is changing many things. This paper reconsiders DC and ac distribution systems. In particular the paper describes the fundamental aspects in order to compare these solutions from economic point of view and to find better proposal in order to realize new grid or add new loads to an existing grid or even change current ac infrastructure to the DC one. To reach this goal, the paper introduces a cost analysis about the electronic device installed in a LV network. Theoretical evaluation has been conducted and a three line DC distribution is selected as possible economic solution for DC LV grid. A case study is performed to evaluate if it is beneficial to change/build a DC distribution system instead of an ac one.
R. Faranda; Hossein Hafezi; L. Martines. DC or AC distribution? An economic evaluation. 2017 IEEE International Conference on Environment and Electrical Engineering and 2017 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe) 2017, 1 -6.
AMA StyleR. Faranda, Hossein Hafezi, L. Martines. DC or AC distribution? An economic evaluation. 2017 IEEE International Conference on Environment and Electrical Engineering and 2017 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe). 2017; ():1-6.
Chicago/Turabian StyleR. Faranda; Hossein Hafezi; L. Martines. 2017. "DC or AC distribution? An economic evaluation." 2017 IEEE International Conference on Environment and Electrical Engineering and 2017 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe) , no. : 1-6.
Load power and energy demand management is interesting for both end users and Distributed System Operators (DSOs). The electric power principle for linear loads gives less power consumption with lower supply voltage. Active power behavior has been analyzed in literature but often the load reactive power and energy absorption are not analyzed. Moreover, nowadays the development in power electronics is changing the load behavior significantly. This article provides experimental investigation and analysis on technologic electrical thermal loads with the purpose of understanding the electrical behavior of these loads from power and energy point of view by voltage variation. Dynamic Voltage Conditioner (DVC) has been used in order to provide different voltage levels at load terminals. The study will analyze the voltage variation effects on load active power, reactive power and energy consumption behavior.
R. Faranda; H. Hafezi; Z. Shafizadeh; A. Fontana. Thermal load management: Experimental investigation of voltage variation effect on loads behavior. 2017 IEEE International Conference on Environment and Electrical Engineering and 2017 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe) 2017, 1 -5.
AMA StyleR. Faranda, H. Hafezi, Z. Shafizadeh, A. Fontana. Thermal load management: Experimental investigation of voltage variation effect on loads behavior. 2017 IEEE International Conference on Environment and Electrical Engineering and 2017 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe). 2017; ():1-5.
Chicago/Turabian StyleR. Faranda; H. Hafezi; Z. Shafizadeh; A. Fontana. 2017. "Thermal load management: Experimental investigation of voltage variation effect on loads behavior." 2017 IEEE International Conference on Environment and Electrical Engineering and 2017 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe) , no. : 1-5.
Voltage regulation is an important issue for Low Voltage (LV) distribution networks. The voltage in the point of delivery to the end users should be kept within standard limits. The paper deals with a single-phase Dynamic Voltage Conditioner (DVC) able to keep the output voltage at a set value under load variations. A double loop control method, with outer voltage and inner current controller, has been used in order to have a better control on current transient. Proposed control method has been designed with MATLAB and several simulations are presented to verify its performance. The device can be interesting for Distribution System Operators (DSOs) and also within smart grid and micro-grid applications.
H. Hafezi; R. Faranda; M. C. Falvo. Single-phase Dynamic Voltage Conditioner control under load variation. 2016 17th International Conference on Harmonics and Quality of Power (ICHQP) 2016, 563 -568.
AMA StyleH. Hafezi, R. Faranda, M. C. Falvo. Single-phase Dynamic Voltage Conditioner control under load variation. 2016 17th International Conference on Harmonics and Quality of Power (ICHQP). 2016; ():563-568.
Chicago/Turabian StyleH. Hafezi; R. Faranda; M. C. Falvo. 2016. "Single-phase Dynamic Voltage Conditioner control under load variation." 2016 17th International Conference on Harmonics and Quality of Power (ICHQP) , no. : 563-568.
Load power demand management is important both for final users and for Distributed System Operators (DSOs) in order to manage their network load profile. So several strategies were adopted to get this result, but nowadays the new technologies in electrical loads as lighting systems are changing the electrical loads behaviour. Therefore, it is necessary to reconsider techniques of voltage optimization and their validation. The paper investigates voltage variation effects on several lighting loads. Effect of voltage variation on both Active and Reactive power consumption are taken into account and results are reported in the work.
R. Faranda; H. Hafezi; Z. Shafizadeh; Alfio Fontana. Load management by voltage optimization: Experimental investigation of voltage variation effect on lighting loads. 2016 IEEE 16th International Conference on Environment and Electrical Engineering (EEEIC) 2016, 1 -6.
AMA StyleR. Faranda, H. Hafezi, Z. Shafizadeh, Alfio Fontana. Load management by voltage optimization: Experimental investigation of voltage variation effect on lighting loads. 2016 IEEE 16th International Conference on Environment and Electrical Engineering (EEEIC). 2016; ():1-6.
Chicago/Turabian StyleR. Faranda; H. Hafezi; Z. Shafizadeh; Alfio Fontana. 2016. "Load management by voltage optimization: Experimental investigation of voltage variation effect on lighting loads." 2016 IEEE 16th International Conference on Environment and Electrical Engineering (EEEIC) , no. : 1-6.
Power quality in LV distribution networks is already a concern in many European countries especially where there is a strong presence of renewable energy generation. Therefore there is a growing interest in new solutions able to improve the power quality level of such a system. Among them, an interesting solution is represented by the open unified power quality conditioner (Open UPQC) proposed within the present work. The system consists of a single or three-phase ac/dc power converter installed at customer's premises and a main single or three-phase ac/dc power converter in the MV/LV substation. The paper discusses the design, simulation and implementation phases related to an Open UPQC installed in a real LV distribution grid in the city of Brescia (Italy) within the smart domo grid project, co-funded by the Italian Ministry of Economic Development. Results from the field installation show the effectiveness of the proposed solution to face power quality issues in distribution networks.
Hossein Hafezi; Gabriele D'Antona; Alessio Dede; Davide Della Giustina; Roberto Faranda; Giovanni Massa. Power Quality Conditioning in LV Distribution Networks: Results by Field Demonstration. IEEE Transactions on Smart Grid 2016, 8, 418 -427.
AMA StyleHossein Hafezi, Gabriele D'Antona, Alessio Dede, Davide Della Giustina, Roberto Faranda, Giovanni Massa. Power Quality Conditioning in LV Distribution Networks: Results by Field Demonstration. IEEE Transactions on Smart Grid. 2016; 8 (1):418-427.
Chicago/Turabian StyleHossein Hafezi; Gabriele D'Antona; Alessio Dede; Davide Della Giustina; Roberto Faranda; Giovanni Massa. 2016. "Power Quality Conditioning in LV Distribution Networks: Results by Field Demonstration." IEEE Transactions on Smart Grid 8, no. 1: 418-427.
In the last years, in the new smart grid framework, the need of enabling and managing the interaction between final users and the main grid has become mandatory. The effective level of interaction depends on the real flexibility of the consumer power demand with respect to the main grid and this level can be increased in case of nano-grids (n-grids), like those of LV domestic customers, via the application of special devices, like the Open Unified Power Quality Conditioner (Open UPQC). Even if this device has been designed for different tasks (PQ, back-up, etc.), the paper is focused on its application in domestic n-grids, with the chief functions of peak-shaving and load-levelling, aimed mainly to reduce the costs of electricity delivery for LV domestic customers. As a consequence, it becomes a tool to support the interaction with the main grid. To assess the advantage of its application, a wide survey on domestic appliances included in a real w-grid has been made, to know the effective power profile, the real peak and average value, basing on which the contractual power is chosen. The analysis of monitoring data shows the potentiality of the application.
M. C. Falvo; M. Manganelli; R. Faranda; H. Hafezi. Smart n-grid energy management with an open UPQC. 2016 IEEE 16th International Conference on Environment and Electrical Engineering (EEEIC) 2016, 1 -6.
AMA StyleM. C. Falvo, M. Manganelli, R. Faranda, H. Hafezi. Smart n-grid energy management with an open UPQC. 2016 IEEE 16th International Conference on Environment and Electrical Engineering (EEEIC). 2016; ():1-6.
Chicago/Turabian StyleM. C. Falvo; M. Manganelli; R. Faranda; H. Hafezi. 2016. "Smart n-grid energy management with an open UPQC." 2016 IEEE 16th International Conference on Environment and Electrical Engineering (EEEIC) , no. : 1-6.
A bidirectional converter able to manage storage is a basic power electronics device, and it is a major component of renewable energy sources, micro grid and also the smart grid concept. In this paper, single-phase bidirectional converter topology is discussed. The state space model has been derived, and a simple model based predictive current controller has been utilized to control the inverter. Control block diagrams have been designed with MATLAB and simulation results are presented and compared with experimental ones, giving credibility to the derived model and the designed control method.
Gabriele D’Antona; Roberto Sebastiano Faranda; Hossein Hafezi; Marco Bugliesi. Experiment on Bidirectional Single Phase Converter Applying Model Predictive Current Controller. Energies 2016, 9, 233 .
AMA StyleGabriele D’Antona, Roberto Sebastiano Faranda, Hossein Hafezi, Marco Bugliesi. Experiment on Bidirectional Single Phase Converter Applying Model Predictive Current Controller. Energies. 2016; 9 (4):233.
Chicago/Turabian StyleGabriele D’Antona; Roberto Sebastiano Faranda; Hossein Hafezi; Marco Bugliesi. 2016. "Experiment on Bidirectional Single Phase Converter Applying Model Predictive Current Controller." Energies 9, no. 4: 233.
Power quality in distribution networks is already a concern in many European Countries where there is a strong presence of renewable energy generation. There is therefore a growing interest in new technologies able to improve the power quality level. Among them, the Open Uninterruptible Power Quality Conditioner (Open UPQC) is a possible solution. The system consists of a main three-phase AC/DC power converter in the MV/LV substation, and some single-phase or three-phase AC/DC power converter installed at customer's premises. The paper discusses design, simulation, implementation of an Open UPQC installed in real distribution grid in the city of Brescia (north of Italy) within Smart Domo Grid, a project co-funded by the Italian Ministry of Economic Development. Some experimental results are also reported.
G. D'Antona; Davide Della Giustina; R. Faranda; H. Hafezi. Open UPQC power quality manager within distributed generation systems. 2015 IEEE 10th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives (SDEMPED) 2015, 501 -507.
AMA StyleG. D'Antona, Davide Della Giustina, R. Faranda, H. Hafezi. Open UPQC power quality manager within distributed generation systems. 2015 IEEE 10th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives (SDEMPED). 2015; ():501-507.
Chicago/Turabian StyleG. D'Antona; Davide Della Giustina; R. Faranda; H. Hafezi. 2015. "Open UPQC power quality manager within distributed generation systems." 2015 IEEE 10th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives (SDEMPED) , no. : 501-507.
Bidirectional converter that is able to manage storage, is a basic power electronics device and it is a major component of renewable energy sources, micro grid and also smart grid concept. In this paper single phase bidirectional converter topology is discussed. State space model has been derived and a simple model based predictive current controller has been utilized to derive the inverter. Control block diagrams has been designed and tested with MATLAB Simulation. Experimental results presented and give credibility to the derived model and control method.
G. D'Antona; R. Faranda; H. Hafezi; M. Bugliesi. Experiment on bidirectional single phase converter applying simple model predictive control. 2015 IEEE 15th International Conference on Environment and Electrical Engineering (EEEIC) 2015, 1019 -1024.
AMA StyleG. D'Antona, R. Faranda, H. Hafezi, M. Bugliesi. Experiment on bidirectional single phase converter applying simple model predictive control. 2015 IEEE 15th International Conference on Environment and Electrical Engineering (EEEIC). 2015; ():1019-1024.
Chicago/Turabian StyleG. D'Antona; R. Faranda; H. Hafezi; M. Bugliesi. 2015. "Experiment on bidirectional single phase converter applying simple model predictive control." 2015 IEEE 15th International Conference on Environment and Electrical Engineering (EEEIC) , no. : 1019-1024.
In recent years, energy production by renewable sources is becoming very important, and photovoltaic (PV) energy has became one of the main renewable sources that is widely available and easily exploitable. In this context, it is necessary to find correct tools to optimize the energy production by PV plants. In this paper, by analyzing available solar irradiance data, an analytical expression for annual DC power production for some selected places is introduced. A general efficiency curve is extracted for different solar inverter types, and by applying approximated function, a new analytical method is proposed to estimate the optimal size of a grid-connected PV plant linked up to a specific inverter from the energetic point of view. An exploitable energy objective function is derived, and several simulations for different locations have been provided. The derived analytical expression contains only the available data of the inverter (such as efficiency, nominal power, etc.) and the PV plant characteristics (such as location and PV nominal power).
Roberto S. Faranda; Hossein Hafezi; Sonia Leva; Marco Mussetta; Emanuele Ogliari. The Optimum PV Plant for a Given Solar DC/AC Converter. Energies 2015, 8, 4853 -4870.
AMA StyleRoberto S. Faranda, Hossein Hafezi, Sonia Leva, Marco Mussetta, Emanuele Ogliari. The Optimum PV Plant for a Given Solar DC/AC Converter. Energies. 2015; 8 (6):4853-4870.
Chicago/Turabian StyleRoberto S. Faranda; Hossein Hafezi; Sonia Leva; Marco Mussetta; Emanuele Ogliari. 2015. "The Optimum PV Plant for a Given Solar DC/AC Converter." Energies 8, no. 6: 4853-4870.
In this paper single-phase instantaneous reactive power (p-q) method and non-active current method have been compared. Reactive power and reactive current calculation using these methods have been considered here under distorted voltage and current waveforms. It has been shown that these two methods have some limitations for reactive power compensation. The p-q method with hysteresis current controller and non-active current theory with sinusoidal pulse width modulation (SPWM) controller have been analyzed in Matlab/Simulink. A prototype system has been designed using TMS320F2812 EzDSP in the laboratory and assessment based on simulation and experimental results is given for these methods in this paper.
Hossein Hafezi; Eyup Akpinar; Abdul Balıkcı. Assessment of two different reactive power estimation methods on single phase loads. 2014 16th International Power Electronics and Motion Control Conference and Exposition 2014, 82 -87.
AMA StyleHossein Hafezi, Eyup Akpinar, Abdul Balıkcı. Assessment of two different reactive power estimation methods on single phase loads. 2014 16th International Power Electronics and Motion Control Conference and Exposition. 2014; ():82-87.
Chicago/Turabian StyleHossein Hafezi; Eyup Akpinar; Abdul Balıkcı. 2014. "Assessment of two different reactive power estimation methods on single phase loads." 2014 16th International Power Electronics and Motion Control Conference and Exposition , no. : 82-87.