Giuseppe Buja - Academia.edu (original) (raw)
Papers by Giuseppe Buja
IEEE Transactions on Industry Applications
IEEE Journal on Emerging and Selected Topics in Circuits and Systems, 2022
2021 IEEE Transportation Electrification Conference (ITEC-India)
Applied Sciences
With the massive access of distributed renewable energy sources, many uncertain renewable energy ... more With the massive access of distributed renewable energy sources, many uncertain renewable energy power components have been added to the low-voltage lines in substations in addition to the loads of definite classification. From the perspective of economy and cleanliness, it is necessary to quantitatively analyze the renewable energy share among them and improve the power quality level of users. For the power quality information at low-voltage feeders, this paper proposes a quantitative analysis algorithm based on improved wavelet energy entropy and LSTM neural network. The method is based on wavelet transform, based on sym8 wavelet basis function; it divides the long time sequence into equal-length small time sequences, calculates each feature component obtained from wavelet transform decomposition separately, then borrows the concept of information entropy to find its energy entropy. After obtaining the energy entropy sequence of each feature component, it then borrows the concept ...
2022 IEEE 5th International Electrical and Energy Conference (CIEEC)
2022 IEEE 5th International Electrical and Energy Conference (CIEEC)
IEEE Transactions on Industrial Electronics
2022 4th Asia Energy and Electrical Engineering Symposium (AEEES)
As a kind of modularized design of high power converter, modular multilevel converter is widely u... more As a kind of modularized design of high power converter, modular multilevel converter is widely used in various high-voltage and high-power applications, because of its good topology structure and expansibility, which is realized by sub-modules. As a result, a large number of sub-modules are integrated in the converter, within which the capacitors greatly affect the reliability of the converter. Thus, it is necessary to monitor the health of the capacitors in the sub-modules. In this paper, an intelligent algorithm-based method is proposed to monitor the sub-module capacitance in modular multilevel converter, by selecting bridge arm currents, dc voltage and sub-module switch signal integration as the characteristics of capacitor degradation. Neural network algorithm is selected as an example to monitor the sub-module capacitor value. Simulation results show the effectiveness and accuracy of the proposed method.
2021 AEIT International Conference on Electrical and Electronic Technologies for Automotive (AEIT AUTOMOTIVE), 2021
This paper presents a model of electric vehicle fast charging station (EVFCS) connected to the gr... more This paper presents a model of electric vehicle fast charging station (EVFCS) connected to the grid. Impact of supply side voltage sag on the process of charging of an electric vehicle (EV) connected to EVFCS is studied. Behaviour of quantities relevant to the process such as DC link voltage, charging current, state-of-charge (SOC) and voltage of battery are investigated using MATLAB/Simulink. A dynamic voltage restorer (DVR) based on 5-level transistor-clamped H-bridge (TCHB) inverter is used to mitigate the voltage sag and to improve the performance of EVFCS. The simulation results shows the beneficial influence of the DVR mitigation on DC-link voltage, charging current, voltage and SOC of battery.
2017 IEEE 11th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives (SDEMPED), 2017
The paper deals with the reactive power compensation in single-phase systems by active power line... more The paper deals with the reactive power compensation in single-phase systems by active power line conditioners (APLCs), focusing on the effectiveness of the compensating action when the utility voltage is distorted. The existing compensation approach, based on the achievement of a sinusoidal load current, is first presented, showing that it suffers from some shortcomings. A novel compensation approach, based on the achievement of a unity power factor, is then proposed that has the merit of overcoming the shortcomings of the existing one and, in addition, of outperforming it in terms of power delivery capabilities of the utility. Effectiveness of the proposed compensation approach is corroborated by simulation results.
IFAC Proceedings Volumes, 1974
Proceedings of IECON'94 - 20th Annual Conference of IEEE Industrial Electronics
A simple scheme for the neural network (NN) adaptive control of the speed of a DC drive is presen... more A simple scheme for the neural network (NN) adaptive control of the speed of a DC drive is presented. The scheme consists of an NN-based controller, a reference model, and an algorithm for changing the NN weights in order that the speed of the drive tracks that of the model. The scheme is first designed by simulation. The effect of
EUROCON 2005 - The International Conference on "Computer as a Tool", 2005
ABSTRACT The introduction of drive-by-wire (DbW) systems in the vehicles makes it feasible the im... more ABSTRACT The introduction of drive-by-wire (DbW) systems in the vehicles makes it feasible the implementation of active controls to improve the driving safety. In this paper, an anti-roll control for a lift truck is developed by exploiting the capabilities offered by a DbW system. To this aim, a suitable multi-mass model of the lift truck is formulated and the rollover condition is analyzed for both pivoting and locked rear axle. From the analysis, the longitudinal speed at which rollover begins is found as a function of the cornering and loading situations. Further to this result, the anti-roll control is arranged that substantially operates by conditioning the speed command entered by the driver. Hints on the implementation of the control are dropped
2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551)
ABSTRACT The paper is concerned with the development of an active flicker compensator. It is show... more ABSTRACT The paper is concerned with the development of an active flicker compensator. It is shown that the compensation of the fluctuating component of the instantaneous imaginary power produces a substantial, but not complete, elimination of the voltage fluctuations. A novel compensation strategy is presented, which reduces the voltage fluctuations drastically while keeping unchanged the voltage ripple on the dc bus of the converter. The effectiveness of the compensation strategy is demonstrated by simulation. The laboratory setup designed for experimental purposes is under development and is described in the paper.
2004 IEEE International Conference on Industrial Technology, 2004. IEEE ICIT '04.
... DEPENDABILITY OF SAFETY-CRITICAL SYSTEMS Giuseppe Buja*, Fellow, IEEE, Simone Castellan**, Ro... more ... DEPENDABILITY OF SAFETY-CRITICAL SYSTEMS Giuseppe Buja*, Fellow, IEEE, Simone Castellan**, Roberto Menis***, member, IEEE, and Albert0 Zuccollo**** ... [I21 R.Frank, M.Baker, LCPuh1, EADabbish, and M.Danielsen, “Sensing and system aspects of fault tolerant ...
![Research paper thumbnail of S&YP + Mentors + Peace + Love = Science and Growing [Students and Young Professionals News]](https://attachments.academia-assets.com/114424717/thumbnails/1.jpg)
](IEEE Industrial Electronics Magazine
2022 4th Asia Energy and Electrical Engineering Symposium (AEEES), Mar 25, 2022
The penetration of distributed generations (DGs) and the proportion of DC load promote the develo... more The penetration of distributed generations (DGs) and the proportion of DC load promote the development of direct current (DC) distribution network to a certain extent. However, the stability of DC distribution network is influenced due to the intermittence and randomness of DGs. As a demand-side management method, DC electric spring (DCES) can assist energy storage system (ESS) to optimize the operation of DC distribution network. In this paper, a two-layer planning method based on the latest DCES topology is proposed to determine the location and capacity of DCESs, adopting particle swarm optimization (PSO) to solve the issue. The stability and economy of DC distribution network as well as the penetration of DGs are considered comprehensively. The upper level aims to improve the stability of the network while the lower level serves to reduce operational cost and improve allowable penetration of DGs. The effectiveness of the planning method has been verified on IEEE 14-bus system.
IEEE Transactions on Industry Applications
IEEE Journal on Emerging and Selected Topics in Circuits and Systems, 2022
2021 IEEE Transportation Electrification Conference (ITEC-India)
Applied Sciences
With the massive access of distributed renewable energy sources, many uncertain renewable energy ... more With the massive access of distributed renewable energy sources, many uncertain renewable energy power components have been added to the low-voltage lines in substations in addition to the loads of definite classification. From the perspective of economy and cleanliness, it is necessary to quantitatively analyze the renewable energy share among them and improve the power quality level of users. For the power quality information at low-voltage feeders, this paper proposes a quantitative analysis algorithm based on improved wavelet energy entropy and LSTM neural network. The method is based on wavelet transform, based on sym8 wavelet basis function; it divides the long time sequence into equal-length small time sequences, calculates each feature component obtained from wavelet transform decomposition separately, then borrows the concept of information entropy to find its energy entropy. After obtaining the energy entropy sequence of each feature component, it then borrows the concept ...
2022 IEEE 5th International Electrical and Energy Conference (CIEEC)
2022 IEEE 5th International Electrical and Energy Conference (CIEEC)
IEEE Transactions on Industrial Electronics
2022 4th Asia Energy and Electrical Engineering Symposium (AEEES)
As a kind of modularized design of high power converter, modular multilevel converter is widely u... more As a kind of modularized design of high power converter, modular multilevel converter is widely used in various high-voltage and high-power applications, because of its good topology structure and expansibility, which is realized by sub-modules. As a result, a large number of sub-modules are integrated in the converter, within which the capacitors greatly affect the reliability of the converter. Thus, it is necessary to monitor the health of the capacitors in the sub-modules. In this paper, an intelligent algorithm-based method is proposed to monitor the sub-module capacitance in modular multilevel converter, by selecting bridge arm currents, dc voltage and sub-module switch signal integration as the characteristics of capacitor degradation. Neural network algorithm is selected as an example to monitor the sub-module capacitor value. Simulation results show the effectiveness and accuracy of the proposed method.
2021 AEIT International Conference on Electrical and Electronic Technologies for Automotive (AEIT AUTOMOTIVE), 2021
This paper presents a model of electric vehicle fast charging station (EVFCS) connected to the gr... more This paper presents a model of electric vehicle fast charging station (EVFCS) connected to the grid. Impact of supply side voltage sag on the process of charging of an electric vehicle (EV) connected to EVFCS is studied. Behaviour of quantities relevant to the process such as DC link voltage, charging current, state-of-charge (SOC) and voltage of battery are investigated using MATLAB/Simulink. A dynamic voltage restorer (DVR) based on 5-level transistor-clamped H-bridge (TCHB) inverter is used to mitigate the voltage sag and to improve the performance of EVFCS. The simulation results shows the beneficial influence of the DVR mitigation on DC-link voltage, charging current, voltage and SOC of battery.
2017 IEEE 11th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives (SDEMPED), 2017
The paper deals with the reactive power compensation in single-phase systems by active power line... more The paper deals with the reactive power compensation in single-phase systems by active power line conditioners (APLCs), focusing on the effectiveness of the compensating action when the utility voltage is distorted. The existing compensation approach, based on the achievement of a sinusoidal load current, is first presented, showing that it suffers from some shortcomings. A novel compensation approach, based on the achievement of a unity power factor, is then proposed that has the merit of overcoming the shortcomings of the existing one and, in addition, of outperforming it in terms of power delivery capabilities of the utility. Effectiveness of the proposed compensation approach is corroborated by simulation results.
IFAC Proceedings Volumes, 1974
Proceedings of IECON'94 - 20th Annual Conference of IEEE Industrial Electronics
A simple scheme for the neural network (NN) adaptive control of the speed of a DC drive is presen... more A simple scheme for the neural network (NN) adaptive control of the speed of a DC drive is presented. The scheme consists of an NN-based controller, a reference model, and an algorithm for changing the NN weights in order that the speed of the drive tracks that of the model. The scheme is first designed by simulation. The effect of
EUROCON 2005 - The International Conference on "Computer as a Tool", 2005
ABSTRACT The introduction of drive-by-wire (DbW) systems in the vehicles makes it feasible the im... more ABSTRACT The introduction of drive-by-wire (DbW) systems in the vehicles makes it feasible the implementation of active controls to improve the driving safety. In this paper, an anti-roll control for a lift truck is developed by exploiting the capabilities offered by a DbW system. To this aim, a suitable multi-mass model of the lift truck is formulated and the rollover condition is analyzed for both pivoting and locked rear axle. From the analysis, the longitudinal speed at which rollover begins is found as a function of the cornering and loading situations. Further to this result, the anti-roll control is arranged that substantially operates by conditioning the speed command entered by the driver. Hints on the implementation of the control are dropped
2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551)
ABSTRACT The paper is concerned with the development of an active flicker compensator. It is show... more ABSTRACT The paper is concerned with the development of an active flicker compensator. It is shown that the compensation of the fluctuating component of the instantaneous imaginary power produces a substantial, but not complete, elimination of the voltage fluctuations. A novel compensation strategy is presented, which reduces the voltage fluctuations drastically while keeping unchanged the voltage ripple on the dc bus of the converter. The effectiveness of the compensation strategy is demonstrated by simulation. The laboratory setup designed for experimental purposes is under development and is described in the paper.
2004 IEEE International Conference on Industrial Technology, 2004. IEEE ICIT '04.
... DEPENDABILITY OF SAFETY-CRITICAL SYSTEMS Giuseppe Buja*, Fellow, IEEE, Simone Castellan**, Ro... more ... DEPENDABILITY OF SAFETY-CRITICAL SYSTEMS Giuseppe Buja*, Fellow, IEEE, Simone Castellan**, Roberto Menis***, member, IEEE, and Albert0 Zuccollo**** ... [I21 R.Frank, M.Baker, LCPuh1, EADabbish, and M.Danielsen, “Sensing and system aspects of fault tolerant ...
IEEE Industrial Electronics Magazine
2022 4th Asia Energy and Electrical Engineering Symposium (AEEES), Mar 25, 2022
The penetration of distributed generations (DGs) and the proportion of DC load promote the develo... more The penetration of distributed generations (DGs) and the proportion of DC load promote the development of direct current (DC) distribution network to a certain extent. However, the stability of DC distribution network is influenced due to the intermittence and randomness of DGs. As a demand-side management method, DC electric spring (DCES) can assist energy storage system (ESS) to optimize the operation of DC distribution network. In this paper, a two-layer planning method based on the latest DCES topology is proposed to determine the location and capacity of DCESs, adopting particle swarm optimization (PSO) to solve the issue. The stability and economy of DC distribution network as well as the penetration of DGs are considered comprehensively. The upper level aims to improve the stability of the network while the lower level serves to reduce operational cost and improve allowable penetration of DGs. The effectiveness of the planning method has been verified on IEEE 14-bus system.