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Nowadays, the reduction of aircraft emissions is one of the industrial targets with a horizon time until 2050. The recent progresses in electrical drives give the opportunity to modify the aircraft propulsion based on thermal engine or gas turbine to a hybrid/full electric one. Some problems must be solved: weight, reliability, and the choice of the best configuration for the electric propulsion. One of the most important aspects to solve is the thermal behavior of power converters and electric motors. This paper proposes an optimization procedure for the design of surface permanent magnet motors used for the aircraft propulsion: the aim of the paper is to investigate the possibility of cooling the motor with only the air flow due to the aircraft speed. The optimization procedure has been solved with the integration of analytical model and finite element analysis and using a differential evolution algorithm.
Luigi Pio Di Noia; Luigi Piegari; Renato Rizzo. Optimization Methodology of PMSM Cooled by External Convection in Aircraft Propulsion. Energies 2020, 13, 3975 .
AMA StyleLuigi Pio Di Noia, Luigi Piegari, Renato Rizzo. Optimization Methodology of PMSM Cooled by External Convection in Aircraft Propulsion. Energies. 2020; 13 (15):3975.
Chicago/Turabian StyleLuigi Pio Di Noia; Luigi Piegari; Renato Rizzo. 2020. "Optimization Methodology of PMSM Cooled by External Convection in Aircraft Propulsion." Energies 13, no. 15: 3975.
The presence and evolution of static power converters in electric grids are growing on a daily basis. Starting from the most used voltage source converter (VSC), passing through the use of multilevel converters, the most recent configuration is the so-called modular multilevel converter (MMC). Because of its intrinsic advantages, it is used not only in high-voltage systems but also in low- and medium-voltage ones to interface renewable energy sources such as photovoltaic (PV) panels. Several configurations and maximum power point tracker (MPPT) algorithms have been proposed and analyzed for MMC-PV-based systems. However, when using distributed MPPTs, partial shading conditions cause a problem. The PV panel can be directly connected to the MMC using its dc link or submodule. Based on this configuration, this paper proposes a novel control strategy that tracks both the ac grid current and ac circulating current for a single-phase low-voltage system to obtain the maximum power under any irradiance condition. The effectiveness of the proposed control strategy is demonstrated through time-domain simulation results.
Simone Barcellona; Marzio Barresi; Luigi Piegari. MMC-Based PV Single-Phase System with Distributed MPPT. Energies 2020, 13, 3964 .
AMA StyleSimone Barcellona, Marzio Barresi, Luigi Piegari. MMC-Based PV Single-Phase System with Distributed MPPT. Energies. 2020; 13 (15):3964.
Chicago/Turabian StyleSimone Barcellona; Marzio Barresi; Luigi Piegari. 2020. "MMC-Based PV Single-Phase System with Distributed MPPT." Energies 13, no. 15: 3964.
The increasing integration of renewable energies reduces the inertia of power systems and thus adds stiffness to grid dynamics. For this reason, methods to obtain virtual inertia have been proposed to imitate mechanical behavior of rotating generators, but, usually, these methods rely on extra power reserves. In this paper, a novel ancillary service is proposed to alleviate frequency transients by smoothing the electromagnetic torque of synchronous generators due to change of active power consumed by loads. Being implemented by grid-tied inverters of renewables, the ancillary service regulates the reactive power flow in response to frequency transients, thereby demanding no additional power reserves and having little impact on renewables’ active power generation. Differently from the active power compensation by virtual inertia methods, it aims to low-pass filter the transients of the active power required to synchronous generators. The proposed ancillary service is firstly verified in simulation in comparison with the virtual inertia method, and afterwards tested on processor by controller-hardware-in-the-loop simulation, analysing practical issues and providing indications for making the algorithm suitable in real implementation. The ancillary service proves effective in damping frequency transients and appropriate to be used in grid with distributed power generators.
Yujia Huo; Simone Barcellona; Luigi Piegari; Giambattista Gruosso. Reactive Power Injection to Mitigate Frequency Transients Using Grid Connected PV Systems. Energies 2020, 13, 1998 .
AMA StyleYujia Huo, Simone Barcellona, Luigi Piegari, Giambattista Gruosso. Reactive Power Injection to Mitigate Frequency Transients Using Grid Connected PV Systems. Energies. 2020; 13 (8):1998.
Chicago/Turabian StyleYujia Huo; Simone Barcellona; Luigi Piegari; Giambattista Gruosso. 2020. "Reactive Power Injection to Mitigate Frequency Transients Using Grid Connected PV Systems." Energies 13, no. 8: 1998.
Lithium ion batteries are being used in an increasing number of applications. However, one of their major weaknesses is their sensitivity to temperature. Indeed, their safety and aging strongly depend on their temperature. In order to control cell temperatures, each cell in a battery pack is usually equipped with a thermal sensor. This paper proposes an integrated electro-thermal model that is capable of predicting the thermal behavior of a battery cell based only on its current and ambient conditions. The proposed model was tuned and validated by means of experimental results. The obtained precision is sufficient to predict the temperature of a battery with an acceptable accuracy considering the low complexity of the proposed model.
Simone Barcellona; Luigi Piegari. Integrated electro-thermal model for pouch lithium ion batteries. Mathematics and Computers in Simulation 2020, 183, 5 -19.
AMA StyleSimone Barcellona, Luigi Piegari. Integrated electro-thermal model for pouch lithium ion batteries. Mathematics and Computers in Simulation. 2020; 183 ():5-19.
Chicago/Turabian StyleSimone Barcellona; Luigi Piegari. 2020. "Integrated electro-thermal model for pouch lithium ion batteries." Mathematics and Computers in Simulation 183, no. : 5-19.
Nowadays, lithium ion batteries are increasingly spreading in different areas and therefore, it is very important to understand their aging behavior. According to the technical literature, battery aging can be dissociated in calendar aging and cycle aging. Calendar aging, in particular, depends on the temperature and state of charge (SoC). In addition to the previous factors, cycle aging also depends on the current rate, and charge/discharge cut-off voltages. In the literature, only a few papers have considered battery aging as a function of the charge/discharge current rate, but they agree that a higher current rate leads to faster battery aging. In any case, all of the tests have been conducted in a climactic chamber with a constant room temperature. However, even if the room temperature is controlled, for high current rates, the temperature of the battery cell increases, which makes it impossible to distinguish the aging due to the current from that due to the temperature. For this reason, in the present work, the authors focused on the lithium ion battery aging due to the current rate while maintaining a constant battery temperature using opportunely controlled Peltier cells. In this way, an interesting results was obtained, i.e. the cycle aging is not dependent on the current rate.
S. Barcellona; L. Piegari. Effect of current on cycle aging of lithium ion batteries. Journal of Energy Storage 2020, 29, 101310 .
AMA StyleS. Barcellona, L. Piegari. Effect of current on cycle aging of lithium ion batteries. Journal of Energy Storage. 2020; 29 ():101310.
Chicago/Turabian StyleS. Barcellona; L. Piegari. 2020. "Effect of current on cycle aging of lithium ion batteries." Journal of Energy Storage 29, no. : 101310.
Energy storage systems (ESSs) bring various opportunities for a more reliable and flexible operation of microgrids (MGs). Among them, energy arbitrage and ancillary services are the most investigated application of ESSs. Furthermore, it has been shown that some other services could also be provided by ESSs such as power quality (PQ) improvements. This issue could be more challenging in MGs with widespread nonlinear loads injecting harmonic currents to the MG. In this paper, the feasibility of ESSs to act as coordinated active harmonic filters (AHF) for distributed compensation was investigated. An optimization model was proposed for the coordination of the harmonic compensation activities of ESSs. The model takes into account the various technical and systematic constraints to economically determine the required reference currents of various AHFs. Simulation cases showed the performance of the proposed model for enhancing the harmonic filtering capability of the MG, reduction in the compensation cost, and more flexibility of the distributed harmonic compensation schemes. It was also shown that ESS activities in harmonic compensation do not have much of an effect on the ESSs revenue from energy arbitrage. Hence, it could make ESSs more justifiable for use in MGs.
Abbas Marini; Luigi Piegari; S-Saeedallah Mortazavi; Mohammad-S Ghazizadeh. Coordinated Operation of Energy Storage Systems for Distributed Harmonic Compensation in Microgrids. Energies 2020, 13, 771 .
AMA StyleAbbas Marini, Luigi Piegari, S-Saeedallah Mortazavi, Mohammad-S Ghazizadeh. Coordinated Operation of Energy Storage Systems for Distributed Harmonic Compensation in Microgrids. Energies. 2020; 13 (3):771.
Chicago/Turabian StyleAbbas Marini; Luigi Piegari; S-Saeedallah Mortazavi; Mohammad-S Ghazizadeh. 2020. "Coordinated Operation of Energy Storage Systems for Distributed Harmonic Compensation in Microgrids." Energies 13, no. 3: 771.
Davide De Simone; Pietro Tricoli; Salvatore D'arco; Luigi Piegari. Windowed PWM: A Configurable Modulation Scheme for Modular Multilevel Converter-Based Traction Drives. IEEE Transactions on Power Electronics 2020, 35, 9727 -9736.
AMA StyleDavide De Simone, Pietro Tricoli, Salvatore D'arco, Luigi Piegari. Windowed PWM: A Configurable Modulation Scheme for Modular Multilevel Converter-Based Traction Drives. IEEE Transactions on Power Electronics. 2020; 35 (9):9727-9736.
Chicago/Turabian StyleDavide De Simone; Pietro Tricoli; Salvatore D'arco; Luigi Piegari. 2020. "Windowed PWM: A Configurable Modulation Scheme for Modular Multilevel Converter-Based Traction Drives." IEEE Transactions on Power Electronics 35, no. 9: 9727-9736.
One of the biggest issues preventing the spread of electric vehicles is the difficulty in supporting distributed fast charging stations by actual distribution grids. Indeed, a significant amount of power is required for fast charging, especially if multiple vehicles must be supplied simultaneously. A possible solution to mitigate this problem is the installation of auxiliary batteries in the charging station to support the grid during high peak power demands. Nevertheless, the integration of high-voltage batteries with significant power is not a trivial task. This paper proposes the configuration and control of a converter to integrate batteries in a fast charging station. The proposed configuration makes it possible to decouple the grid power from the vehicle power using several auxiliary battery modules. At the same time, the converter makes it possible to draw different amounts of power from the battery modules, allowing the use of second life batteries performing in different ways. This paper discusses the design, control, and operation of the converter. Moreover, the effectiveness of the proposed control is shown by means of numerical results.
Davide De Simone; Luigi Piegari. Integration of Stationary Batteries for Fast Charge EV Charging Stations. Energies 2019, 12, 4638 .
AMA StyleDavide De Simone, Luigi Piegari. Integration of Stationary Batteries for Fast Charge EV Charging Stations. Energies. 2019; 12 (24):4638.
Chicago/Turabian StyleDavide De Simone; Luigi Piegari. 2019. "Integration of Stationary Batteries for Fast Charge EV Charging Stations." Energies 12, no. 24: 4638.
Nowadays, energy storage systems, such as batteries, are spreading in many applications. Among the kinds of batteries, the lithium-ion technology is one of the most promising solutions. Considering the photovoltaic (PV) plants, it is very important to perform a correct sizing of the battery pack to both maximise the self-consumption and minimise the total costs. In general, PV plants need a dc–dc converter to maximise the electric power that can be extracted from PV panels and a dc–ac converter to connect them to the ac grid. The battery pack can be connected in three different ways: dc coupled and ac coupled using a dedicated converter or through a direct connection on the dc-link between the dc–dc and dc–ac converters. In the present study, the last solution, without any dedicated converters, is used and a simple control strategy to both maximise the power extracted from the PV panel and regulate the charging/discharging of the battery is proposed.
Simone Barcellona; Davide De Simone; Luigi Piegari. Simple control strategy for a PV‐battery system. The Journal of Engineering 2019, 2019, 4809 -4812.
AMA StyleSimone Barcellona, Davide De Simone, Luigi Piegari. Simple control strategy for a PV‐battery system. The Journal of Engineering. 2019; 2019 (18):4809-4812.
Chicago/Turabian StyleSimone Barcellona; Davide De Simone; Luigi Piegari. 2019. "Simple control strategy for a PV‐battery system." The Journal of Engineering 2019, no. 18: 4809-4812.
Harmonic distortions are going to be more important in the near future due to widespread employing of power electronic based devices. The quality of power may get degraded without using proper mitigation methods. On the other hand, new paradigms of deregulated markets which make the power a competitive product as well as customer inclinations to pay for a high-quality power, inspire distribution companies to enhance the power quality level. Hence, various investigations should be considered to meet the power quality standards in electric networks. In this paper, a market-based framework is proposed for central management of harmonic compensation actions in microgrids (MGs). Since distributed energy resources (DERs) are prevalent in MGs, the compensations actions could be based on DERs activities in addition to conventional active power line conditioners (APLCs). Hence, a detailed investigation of harmonic filtering capabilities of various DERs is firstly represented. Afterward, a global model is proposed for various harmonic active power filters (APFs) either based on DERs or APLCs. To comply with the obligations of deregulated power markets, a new concept named as harmonic power market (HPM) is proposed for economic management of various APF resources participating in harmonic mitigation actions. Furthermore, a distortion power expexted payment function (DEPF) is introduced for each APF participating in the HPM. The HPM framework is modeled as an optimization model subject to various standards, technical and systematic constraints implemented in some case studies. Simulation results show the capability and performance of the proposed model for optimal management of various APF resources in harmonic compensation. Increasing in harmonic filtering capability, deferring the requirements for installation of new APLCs as well as a decrease in harmonic compensation costs are the main advantages of using DER based APFs in the HPM.
Abbas Marini; Mohammad-Sadegh Ghazizadeh; Seyed Saeedallah Mortazavi; Luigi Piegari. A harmonic power market framework for compensation management of DER based active power filters in microgrids. International Journal of Electrical Power & Energy Systems 2019, 113, 916 -931.
AMA StyleAbbas Marini, Mohammad-Sadegh Ghazizadeh, Seyed Saeedallah Mortazavi, Luigi Piegari. A harmonic power market framework for compensation management of DER based active power filters in microgrids. International Journal of Electrical Power & Energy Systems. 2019; 113 ():916-931.
Chicago/Turabian StyleAbbas Marini; Mohammad-Sadegh Ghazizadeh; Seyed Saeedallah Mortazavi; Luigi Piegari. 2019. "A harmonic power market framework for compensation management of DER based active power filters in microgrids." International Journal of Electrical Power & Energy Systems 113, no. : 916-931.
Despite the yearly rise in the market quota of full electric vehicles, the main limitations on the deployment of electric vehicles are the real performances of the battery storage during operation. In this study, the authors focus on hybrid electrical storage systems composed of lead acid batteries and supercapacitors. Two different coupling methods are investigated: (i) the direct parallel coupling of the two storage devices and (ii) coupling by means of a step-up converter between the supercapacitor bank and direct current (DC) link of the entire power-train, where lead acid batteries are also connected. A specific control strategy is proposed and implemented in the step-up converter to guarantee the correct power management of the power train and in particular: (i) to save the power request to the lead acid battery pack, (ii) maintain an adequate state of charge of the supercapacitor bank, and (iii) guarantee an adequate voltage level on the DC link. A prototype of the hybrid battery, integrating the proposed control technique, was realised and tested on a real forklift. The performances of the entire power-train were experimentally measured in a warehouse test cycle emulating a typical daily working cycle.
Francesco Castelli Dezza; Vincenzo Musolino; Luigi Piegari; Renato Rizzo. Hybrid battery–supercapacitor system for full electric forklifts. IET Electrical Systems in Transportation 2019, 9, 16 -23.
AMA StyleFrancesco Castelli Dezza, Vincenzo Musolino, Luigi Piegari, Renato Rizzo. Hybrid battery–supercapacitor system for full electric forklifts. IET Electrical Systems in Transportation. 2019; 9 (1):16-23.
Chicago/Turabian StyleFrancesco Castelli Dezza; Vincenzo Musolino; Luigi Piegari; Renato Rizzo. 2019. "Hybrid battery–supercapacitor system for full electric forklifts." IET Electrical Systems in Transportation 9, no. 1: 16-23.
Real-time operation, analysis and control of active distribution systems (DSs) mainly rely on accurate power flow (PF) results. Almost all decisions are made considering PF calculations. On the other hand, efficiency of PF algorithm should be updated to comply with new smart grid paradigms which affect traditional management methods of DSs. A new graph theory based PF algorithm is proposed in this paper for active electrical DSs including various distributed generation (DG) models, three phase equipment and meshed topologies. At first, two incidence matrices are proposed for modeling of DSs. These matrices could successfully handle meshed topologies and unbalanced networks. They could also be modified to consider various three phase equipment such as transformers and voltage regulators. Moreover, a comprehensive study of various modeling methods of DGs in PF studies is presented. In order to handle DG models, a new sensitivity matrix is proposed for in-algorithm calculation of reactive power injection of PV buses. Since, the proposed incidence matrices provide a decoupled model of the network, any topology and characteristic change could be simply applied in this PF algorithm. The proposed PF algorithm was tested in several simulations in various test systems. The results of accuracy test, performance test, and robustness test show capability of the proposed PF algorithm for handling various situations in different PF calculations.
Abbas Marini; S.S. Mortazavi; Luigi Piegari; Mohammad-S. Ghazizadeh. An efficient graph-based power flow algorithm for electrical distribution systems with a comprehensive modeling of distributed generations. Electric Power Systems Research 2019, 170, 229 -243.
AMA StyleAbbas Marini, S.S. Mortazavi, Luigi Piegari, Mohammad-S. Ghazizadeh. An efficient graph-based power flow algorithm for electrical distribution systems with a comprehensive modeling of distributed generations. Electric Power Systems Research. 2019; 170 ():229-243.
Chicago/Turabian StyleAbbas Marini; S.S. Mortazavi; Luigi Piegari; Mohammad-S. Ghazizadeh. 2019. "An efficient graph-based power flow algorithm for electrical distribution systems with a comprehensive modeling of distributed generations." Electric Power Systems Research 170, no. : 229-243.
In recent years, DC distribution grids have become increasingly popular because of the interest in the diffusion of distributed renewable energy. In this scenario, DC distribution grids are also favored because of the increased use of batteries and power electronic loads. The main limit to the spread of DC grids is their protection devices, which still present several problems. At present, protection devices are represented by traditional mechanical breakers or static electronic components. The first, which interrupt DC currents, have good reliability but need maintenance and have long intervention periods. In contrast, electronic switches are fast and reliable, but they reduce the efficiency because of their voltage drop. In this scenario, some hybrid breakers have been proposed to obtain the advantages of both devices. The previous solutions of hybrid breakers still suffer several critical issues and, usually, are not capable of protecting a system from short circuits without significantly reducing their lifetime. In this paper, a new low-voltage hybrid circuit breaker topology is proposed. The procedure to dimension all of the active and passive components in the device is analyzed, and the effectiveness of the proposed solution is proven by means of experimental results obtained using a prototype.
Riccardo Lazzari; Luigi Piegari. Design and Implementation of LVDC Hybrid Circuit Breaker. IEEE Transactions on Power Electronics 2018, 34, 7369 -7380.
AMA StyleRiccardo Lazzari, Luigi Piegari. Design and Implementation of LVDC Hybrid Circuit Breaker. IEEE Transactions on Power Electronics. 2018; 34 (8):7369-7380.
Chicago/Turabian StyleRiccardo Lazzari; Luigi Piegari. 2018. "Design and Implementation of LVDC Hybrid Circuit Breaker." IEEE Transactions on Power Electronics 34, no. 8: 7369-7380.
Over the recent years, low-voltage dc (LVDC) distribution systems have become increasingly interesting. One of the main problems in their diffusion is the realization of reliable protection systems ensuring selectivity and security to the loads. Several solutions to this problem are studied in the current literature and are mainly focused on the design and integration of new protection devices. Nevertheless, for some faults, it is possible to use traditional protection devices if proper control strategies are used on the power converters. In this paper, the ground fault of one of the dc poles is considered for grids operated with the neutral ground connected on the ac side and isolated on the dc side. In these conditions, if, as usual, a voltage source converter (VSC) is used as an interface between ac and dc grids, the IGBTs of the VSC are capable neither of limiting nor of blocking the fault current. In this paper, the integration of a proper control strategy implemented on the VSC with the protection devices is proposed to allow the system to interrupt, clearing the fault, saving the power converter. The proposed strategy ensures selectivity and security to the loads because it implies the interruption only of the faulty feeder of the dc microgrid. In this paper, the proposed strategy is tested by means of numerical simulations and experimental results, thus proving its good performances.
Riccardo Lazzari; L. Piegari; S. Grillo; M. Carminati; E. Ragaini; C. Bossi; E. Tironi. Selectivity and security of DC microgrid under line-to-ground fault. Electric Power Systems Research 2018, 165, 238 -249.
AMA StyleRiccardo Lazzari, L. Piegari, S. Grillo, M. Carminati, E. Ragaini, C. Bossi, E. Tironi. Selectivity and security of DC microgrid under line-to-ground fault. Electric Power Systems Research. 2018; 165 ():238-249.
Chicago/Turabian StyleRiccardo Lazzari; L. Piegari; S. Grillo; M. Carminati; E. Ragaini; C. Bossi; E. Tironi. 2018. "Selectivity and security of DC microgrid under line-to-ground fault." Electric Power Systems Research 165, no. : 238-249.
Multilevel converters are used to improve the traction converter of modern electric vehicles (EV). Such topologies can be applied even to low-power converter such as dc-dc auxiliary converters, to improve the EV overall efficiency. The low voltage rating of auxiliary circuits implies the usage of low-cost hardware both for power as well for control platforms. A cost-effective explicit model predictive control (eMPC) is designed for a three-level neutral point clamped step-down dc-dc auxiliary converter and compared to an eMPC for a two-level solution. Both eMPCs are compared to a classical PI-type voltage control.
Mattia Rossi; Luigi Piegari; Francesco Castelli-Dezza; Marco Mauri; Maria Stefania Carmeli. Voltage Control Comparison for Low-Power DC-DC Converters in EVs: PI and Explicit MPC. IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society 2018, 5005 -5011.
AMA StyleMattia Rossi, Luigi Piegari, Francesco Castelli-Dezza, Marco Mauri, Maria Stefania Carmeli. Voltage Control Comparison for Low-Power DC-DC Converters in EVs: PI and Explicit MPC. IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society. 2018; ():5005-5011.
Chicago/Turabian StyleMattia Rossi; Luigi Piegari; Francesco Castelli-Dezza; Marco Mauri; Maria Stefania Carmeli. 2018. "Voltage Control Comparison for Low-Power DC-DC Converters in EVs: PI and Explicit MPC." IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society , no. : 5005-5011.
The increasing diffusion of renewable energy sources in the power systems is likely to extend in the near future to power supply of railways. This paper compares the technical and economic benefits of several configurations with power electronics converters for the integration of photovoltaic sources into the railway power supply systems. For each of these configurations, a design methodology is proposed for selecting the ratings of the railway power supply components. The requirements for the phase imbalance on the feeding transmission line are assumed in accordance with current regulatory standards and, wherever necessary, phase balancers are added. The design methodology is applied to the power supply of a high-speed railway and the configurations under study are numerically compared based on their technical feasibility and economic cost, using the generation capacity of the photovoltaic source as independent variable. The analysis demonstrates that with a progressive integration of PV sources into railway systems, the configurations with power converters supplying the overhead lines could become more beneficial than more classical solutions where the overhead line is supplied via a transformer.
Salvatore D'Arco; Luigi Piegari; Pietro Tricoli. Comparative Analysis of Topologies to Integrate Photovoltaic Sources in the Feeder Stations of AC Railways. IEEE Transactions on Transportation Electrification 2018, 4, 951 -960.
AMA StyleSalvatore D'Arco, Luigi Piegari, Pietro Tricoli. Comparative Analysis of Topologies to Integrate Photovoltaic Sources in the Feeder Stations of AC Railways. IEEE Transactions on Transportation Electrification. 2018; 4 (4):951-960.
Chicago/Turabian StyleSalvatore D'Arco; Luigi Piegari; Pietro Tricoli. 2018. "Comparative Analysis of Topologies to Integrate Photovoltaic Sources in the Feeder Stations of AC Railways." IEEE Transactions on Transportation Electrification 4, no. 4: 951-960.
In micro-grids, due to the heavy penetration of distributed energy resources (DERs), especially renewable energy sources (RESs), the characteristic inertia of the system has been decreasing with respect to the total power capacity. In a weak grid, a high step variation of the load leads to a hard transient of frequency. This could imply stability issues for the grid and specific problems for sensitive loads. In order to face this problem, in the technical literature, several algorithms introducing virtual inertia in the system have been proposed. Since, these algorithms are based on the assumption that an equivalent inertia has to be simulated, they need to exchange active power with the network. When this function is implemented in a PV system, a power reserve or an additional storage unit has to be used. In this paper, a technique to increase the transient stability of the generation system, based only on the exchange of reactive power, will be proposed. Its feasibility is demonstrated by means of numerical simulations.
Yujia Huo; Simone Barcellona; Giambattista Gruosso; Luigi Piegari. Definition and Analysis of an Innovative Ancillary Service for Microgrid Stability Improvement. 2018 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM) 2018, 990 -995.
AMA StyleYujia Huo, Simone Barcellona, Giambattista Gruosso, Luigi Piegari. Definition and Analysis of an Innovative Ancillary Service for Microgrid Stability Improvement. 2018 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM). 2018; ():990-995.
Chicago/Turabian StyleYujia Huo; Simone Barcellona; Giambattista Gruosso; Luigi Piegari. 2018. "Definition and Analysis of an Innovative Ancillary Service for Microgrid Stability Improvement." 2018 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM) , no. : 990-995.
Up to few years ago, one of the main problems in the optimal design of a battery energy storage system (BESS) was the availability of both the generation (e.g. renewable sources) and load power profiles of the considered plant. This paradigm has limited the potential of BESSs to drive down overall energy costs and reduce carbon emissions. Nowadays, the exponential growth of data available on the industrial plants has opened the way to new possibilities and opportunities. In addition, BESSs are a viable opportunity to start transforming existing plants with an incremental hybridization of the plant topology. In light of the above, this work develops a commissioning tool that, starting from the data collected on the field, provides the final users the optimal dimensioning of any BESS - according to the target performances required bv the specific application.
Alberto Carboni; Simone Barcellona; Luigi Piegari; Alessandro Ferrero; Enrico Ragaini. An Energy Storage System Commissioning Tool. 2018 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM) 2018, 93 -98.
AMA StyleAlberto Carboni, Simone Barcellona, Luigi Piegari, Alessandro Ferrero, Enrico Ragaini. An Energy Storage System Commissioning Tool. 2018 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM). 2018; ():93-98.
Chicago/Turabian StyleAlberto Carboni; Simone Barcellona; Luigi Piegari; Alessandro Ferrero; Enrico Ragaini. 2018. "An Energy Storage System Commissioning Tool." 2018 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM) , no. : 93-98.
This paper investigates a modified simple soft switching dc-dc converter for low power applications. This simple topology uses an auxiliary switch, an inductor and a capacitor to operate the converter without switching losses. The efficiency of the converter is improved by transferring the energy that would be dissipated during the switching to the load. The main switch turns-on with zero current switching (ZCS) and turns-off with zero voltage switching (ZVS), while the auxiliary switch turns-on and turns-off with zero voltage switching (ZVS). The detailed theoretical analysis and the design equations are described. In addition to that, the analysis of proposed converter is demonstrated by both simulation and experimental results for effectiveness of the study.
S. Raghavendran; B. Chitti Babu; Luigi Piegari. Analysis, Design and Experimental Validation of Modified Simple Soft Switching DC-DC Boost Converter. ENERGYO 2018, 1 .
AMA StyleS. Raghavendran, B. Chitti Babu, Luigi Piegari. Analysis, Design and Experimental Validation of Modified Simple Soft Switching DC-DC Boost Converter. ENERGYO. 2018; ():1.
Chicago/Turabian StyleS. Raghavendran; B. Chitti Babu; Luigi Piegari. 2018. "Analysis, Design and Experimental Validation of Modified Simple Soft Switching DC-DC Boost Converter." ENERGYO , no. : 1.
Nowadays, electric vehicles (EVs) are of great interest over the world. In the past, the diffusion of EVs was impeded because of the limits of energy storage units, which reflect in vehicle range limited extension. In recent years, a significant progress was made in terms of power and energy density thanks to the lithium based batteries that can guarantee vehicle ranges higher than 100 km. Another further step can be done by coupling more than one storage technology and leading to an increased efficiency and extension of the vehicle range. In this paper, the effectiveness of adding another storage unit to a lithium ion battery is investigated for different EVs and driving cycles. Furthermore, a methodology procedure, based on the knowledge of the test driving cycle, and parameters of the EV, is proposed to find the optimal size of the auxiliary storage, that maximizes the EV range.
Simone Barcellona; Luigi Piegari. Improvement of EVs Range by Hybrid Storage Units. 2017 IEEE Vehicle Power and Propulsion Conference (VPPC) 2017, 1 -5.
AMA StyleSimone Barcellona, Luigi Piegari. Improvement of EVs Range by Hybrid Storage Units. 2017 IEEE Vehicle Power and Propulsion Conference (VPPC). 2017; ():1-5.
Chicago/Turabian StyleSimone Barcellona; Luigi Piegari. 2017. "Improvement of EVs Range by Hybrid Storage Units." 2017 IEEE Vehicle Power and Propulsion Conference (VPPC) , no. : 1-5.