This paper proposes a new family of single-switching DC-DC converters. The proposed converters ar... more This paper proposes a new family of single-switching DC-DC converters. The proposed converters are based on the classical Zeta-converter combined with two versions of switched inductors/switched capacitors structures. Analysis of the circuits made it possible to choose the most effective variants in terms of increasing the voltage gain. A detailed analysis of the best of the proposed schemes allowed to obtain graphs of the dependence of the voltage gain on the value of the duty cycle in the continuous and discontinuous current modes. Values of voltage stresses on the semiconductor devices are estimated. Theoretical expectations are confirmed by experimental results.
Nonintrusive load monitoring (NILM) algorithms may suggest different approaches for solving the N... more Nonintrusive load monitoring (NILM) algorithms may suggest different approaches for solving the NILM problem: the disintegrating of total power consumption to the discrete appliances comprising it. All of these algorithms incorporate some cost function to discriminate between the possible options at each sample time. For the estimation process of such algorithms, and the selection of the most likely possibility, we propose a new formulation of a family of cost functions, on the set of the possible assertions per each appliance. The proposed design, abbreviated ARPM (Additive, Retentive Penalty Method), emphasizes two major properties that were discovered to be significant when performing real-time estimation in a NILM system. The first is a granular calculation of Hamming distances between possibilities, and the second is the processing of the changes in the measured power consumption, rather than the consumption value itself. This design consists of a low number of free parameters, and can be integrated additively and seamlessly with existing cost functions already embedded in NILM systems. It had been evaluated with a series of experiments and proven to enhance the success rate by all measured criteria and on various datasets, with no parameter adjustments.
This paper presents a novel modular voltage control algorithm for optimal scheduling of a distrib... more This paper presents a novel modular voltage control algorithm for optimal scheduling of a distribution system’s load tap changers to minimize the number of tap changes while maintaining a voltage deviation (VD) around a desired target. To this end, a bi-objective optimal voltage regulation (OVR) problem is addressed in two distinct stages. First, the operational constraint on the load tap changer is removed to form a single-objective OVR problem relating to the voltage. The solution obtained in this stage is ultimately utilized to determine the penalty value assigned to the distance from the optimal (solely in terms of voltage) control value. In the second stage, the optimal scheduling problem is formulated as a minimum-cost-path problem, which can be efficiently solved via dynamic programming. This approach allows the identification of optimal scheduling that considers both the voltage-related objective as well as the number of load tap changer switching operations with no added co...
2016 IEEE International Conference on the Science of Electrical Engineering (ICSEE), 2016
This paper considers a Matlab-Simulink Model of a system for a load reactive power compensation w... more This paper considers a Matlab-Simulink Model of a system for a load reactive power compensation with consisting of a thyristor-controlled binary switched capacitors (TBSC) and a thyristor controlled reactor (TCR). The capacitors ensure stepwise compensation of reactive power, while the controlled inductance makes it possible to achieve smooth changing of the resulting compensating power within the limits of the minimal capacity in the binary capacitors series. The model uses a very simple algorithm of capacitor control, provided with a logical system that prevents current surges in the moments when capacitors are being connected to the network. The switching of capacitors is set by a closed system for maintenance of the maximal power coefficient. To regulate the inductance in TCR, an invariant system of phase control is used, which maintains the unit value of the power coefficient in the network irrespective of load changes. The realization of the system in the model is maximally close to its possible hardware realization. The functioning of the model has been tested in a wide range of variation of the reactive load power, and the testing confirmed the efficiency of combining a switchable series of binary capacitors and a thyristor-controlled inductance when using the proposed control algorithms.
A non-intrusive load monitoring (NILM) process is intended to allow for the separation of individ... more A non-intrusive load monitoring (NILM) process is intended to allow for the separation of individual appliances from an aggregated energy reading in order to estimate the operation of individual loads. In the past, electricity meters specified only active power readings, for billing purposes, thus limiting NILM capabilities. Recent progress in smart metering technology has introduced cost-effective, household-consumer-grade metering products, which can produce multiple features with high accuracy. In this paper, a new method is proposed for applying a BIRCH (balanced iterative reducing and clustering using hierarchies) algorithm as part of a multi-dimensional load disaggregation solution based on the extraction of multiple features from a smart meter. The method uses low-frequency meter reading and constructs a multi-dimensional feature space with adaption to smart meter parameters and is useful for type I as well as type II loads with the addition of timers. This new method is desc...
Page 1. Last up date: 4 October 2010, Time: 15:09 2010 IEEE 26-th Convention of Electrical and El... more Page 1. Last up date: 4 October 2010, Time: 15:09 2010 IEEE 26-th Convention of Electrical and Electronics Engineers in Israel November 17-20, 2010, Eilat Key Speakers Thursday, 19:30, Canaan Hall Eilam Gross, Weizmann Institute. ...
This paper considers a unique type of multitude DC/DC conversion ratios switched capacitor conver... more This paper considers a unique type of multitude DC/DC conversion ratios switched capacitor converter. The multitude conversion ratios enable the converter to be able to be almost continuous and competitive to inductive based converters. The paper summarizes the basic rules of the topology as well as presenting two possible ways of implementing the topology. The paper also discusses the difference between the series type topology and the parallel one as well as the reasons to implement the latter type of converter. The topologies are presented theoretically as well as the actual prototype characteristics and experimental results.
2018 IEEE International Energy Conference (ENERGYCON), 2018
A novel modification of DC-DC converter with a high voltage ratio is proposed. The converter cons... more A novel modification of DC-DC converter with a high voltage ratio is proposed. The converter consists of an input boost converter, bridge commutator and Dickson voltage multiplier. The circuit is characterized by a high voltage gain. An important advantage of the circuit is its practically rigid external characteristic in the continuous current mode (CCM). This is achieved by the absence of active power losses in the process of capacitors' recharging. An additional advantage of the proposed scheme is the low required capacitance of the voltage multiplier capacitors A detailed analysis of the proposed converters has been produced. The results of theoretical analysis are confirmed by the simulation in MATLAB/SIMULINK. Circuit verification has been made in a laboratory prototype with the output power 200W.
Abstract In recent years power quality monitoring tools are becoming a necessity, and many studie... more Abstract In recent years power quality monitoring tools are becoming a necessity, and many studies focus on detection and classification of Power Quality Disturbances (PQD)s. However, presently a core obstacle that prevents the direct comparison of such classification techniques is the lack of a standard database that can be used as a benchmark. In this light, we propose here an open-source software which enables the creation of synthetic power quality disturbances, and is designed specifically for comparison of PQD classifiers. The software produces several types of standard disturbances from the literature, with varying repetitions and random parameters of the labeled disturbances, and includes two reference classifiers that are based on deep-learning techniques. Due to the good performance of these classifiers, we suggest that they can be used by the community as benchmarks for the development of new and better PQD classification algorithms. The developed code is available online, and is free to use.
2014 IEEE International Energy Conference (ENERGYCON), 2014
The new principle of power maximizing of solar battery (MPPT) is proposed. The system based on a ... more The new principle of power maximizing of solar battery (MPPT) is proposed. The system based on a specific implementation of the PWM DC-DC converters, through which the solar battery is connected to the load. Instead of a linear carrier voltage, typically used in PWM systems, the special created periodic function plays a role of the carrier curve that is mathematically similar to the dependence of the solar panel output power on the duty-cycle of the DC-DC converter connected to it. The function is obtained by scanning a sample low-power solar panel with the special controlled current source. This sample solar panel is located in close proximity to the main battery, and thus its electrical characteristics identical to those of the main one. The maximum of the power curve, obtained in this way at each switching period, determines the value of duty cycle, which should be installed in the main DC-DC converter to achieve MPP. The proposed system is implemented using a simple scheme contained conventional electronic components. The system is characterized by high accuracy and speed. The results of computer modelling and testing of laboratory prototype confirm the theoretical conclusions.
2018 20th European Conference on Power Electronics and Applications (EPE'18 ECCE Europe), 2018
This paper presents a novel very high voltage gain DC-DC converter. Quadratic SEPIC converter inc... more This paper presents a novel very high voltage gain DC-DC converter. Quadratic SEPIC converter incorporated with switched-coupled inductor. The leakage energy of coupled inductor is transferred to the load. The study analyzes operation of the proposed circuit in continuous and discontinuous regimes and determines the boundary between the operation modes. The theoretical expectations are confirmed by the experimental results.
The following work describes an ongoing idea that becomes more logical in the future of domestic ... more The following work describes an ongoing idea that becomes more logical in the future of domestic and military electricity. This paper introduces the necessity for using a DC bus system in private homes as well as introducing an innovative bi-directional inverter for making the energy flow to and from the grid. The bi-directional inverter also enables smart control of the energy flow with harmonics cancelation, and the ability to be adjusted to the future demand of smart grids and multiple tariffs. The research also includes social aspects as an integrated subject in the control schemes of the
This paper proposes a new family of single-switching DC-DC converters. The proposed converters ar... more This paper proposes a new family of single-switching DC-DC converters. The proposed converters are based on the classical Zeta-converter combined with two versions of switched inductors/switched capacitors structures. Analysis of the circuits made it possible to choose the most effective variants in terms of increasing the voltage gain. A detailed analysis of the best of the proposed schemes allowed to obtain graphs of the dependence of the voltage gain on the value of the duty cycle in the continuous and discontinuous current modes. Values of voltage stresses on the semiconductor devices are estimated. Theoretical expectations are confirmed by experimental results.
Nonintrusive load monitoring (NILM) algorithms may suggest different approaches for solving the N... more Nonintrusive load monitoring (NILM) algorithms may suggest different approaches for solving the NILM problem: the disintegrating of total power consumption to the discrete appliances comprising it. All of these algorithms incorporate some cost function to discriminate between the possible options at each sample time. For the estimation process of such algorithms, and the selection of the most likely possibility, we propose a new formulation of a family of cost functions, on the set of the possible assertions per each appliance. The proposed design, abbreviated ARPM (Additive, Retentive Penalty Method), emphasizes two major properties that were discovered to be significant when performing real-time estimation in a NILM system. The first is a granular calculation of Hamming distances between possibilities, and the second is the processing of the changes in the measured power consumption, rather than the consumption value itself. This design consists of a low number of free parameters, and can be integrated additively and seamlessly with existing cost functions already embedded in NILM systems. It had been evaluated with a series of experiments and proven to enhance the success rate by all measured criteria and on various datasets, with no parameter adjustments.
This paper presents a novel modular voltage control algorithm for optimal scheduling of a distrib... more This paper presents a novel modular voltage control algorithm for optimal scheduling of a distribution system’s load tap changers to minimize the number of tap changes while maintaining a voltage deviation (VD) around a desired target. To this end, a bi-objective optimal voltage regulation (OVR) problem is addressed in two distinct stages. First, the operational constraint on the load tap changer is removed to form a single-objective OVR problem relating to the voltage. The solution obtained in this stage is ultimately utilized to determine the penalty value assigned to the distance from the optimal (solely in terms of voltage) control value. In the second stage, the optimal scheduling problem is formulated as a minimum-cost-path problem, which can be efficiently solved via dynamic programming. This approach allows the identification of optimal scheduling that considers both the voltage-related objective as well as the number of load tap changer switching operations with no added co...
2016 IEEE International Conference on the Science of Electrical Engineering (ICSEE), 2016
This paper considers a Matlab-Simulink Model of a system for a load reactive power compensation w... more This paper considers a Matlab-Simulink Model of a system for a load reactive power compensation with consisting of a thyristor-controlled binary switched capacitors (TBSC) and a thyristor controlled reactor (TCR). The capacitors ensure stepwise compensation of reactive power, while the controlled inductance makes it possible to achieve smooth changing of the resulting compensating power within the limits of the minimal capacity in the binary capacitors series. The model uses a very simple algorithm of capacitor control, provided with a logical system that prevents current surges in the moments when capacitors are being connected to the network. The switching of capacitors is set by a closed system for maintenance of the maximal power coefficient. To regulate the inductance in TCR, an invariant system of phase control is used, which maintains the unit value of the power coefficient in the network irrespective of load changes. The realization of the system in the model is maximally close to its possible hardware realization. The functioning of the model has been tested in a wide range of variation of the reactive load power, and the testing confirmed the efficiency of combining a switchable series of binary capacitors and a thyristor-controlled inductance when using the proposed control algorithms.
A non-intrusive load monitoring (NILM) process is intended to allow for the separation of individ... more A non-intrusive load monitoring (NILM) process is intended to allow for the separation of individual appliances from an aggregated energy reading in order to estimate the operation of individual loads. In the past, electricity meters specified only active power readings, for billing purposes, thus limiting NILM capabilities. Recent progress in smart metering technology has introduced cost-effective, household-consumer-grade metering products, which can produce multiple features with high accuracy. In this paper, a new method is proposed for applying a BIRCH (balanced iterative reducing and clustering using hierarchies) algorithm as part of a multi-dimensional load disaggregation solution based on the extraction of multiple features from a smart meter. The method uses low-frequency meter reading and constructs a multi-dimensional feature space with adaption to smart meter parameters and is useful for type I as well as type II loads with the addition of timers. This new method is desc...
Page 1. Last up date: 4 October 2010, Time: 15:09 2010 IEEE 26-th Convention of Electrical and El... more Page 1. Last up date: 4 October 2010, Time: 15:09 2010 IEEE 26-th Convention of Electrical and Electronics Engineers in Israel November 17-20, 2010, Eilat Key Speakers Thursday, 19:30, Canaan Hall Eilam Gross, Weizmann Institute. ...
This paper considers a unique type of multitude DC/DC conversion ratios switched capacitor conver... more This paper considers a unique type of multitude DC/DC conversion ratios switched capacitor converter. The multitude conversion ratios enable the converter to be able to be almost continuous and competitive to inductive based converters. The paper summarizes the basic rules of the topology as well as presenting two possible ways of implementing the topology. The paper also discusses the difference between the series type topology and the parallel one as well as the reasons to implement the latter type of converter. The topologies are presented theoretically as well as the actual prototype characteristics and experimental results.
2018 IEEE International Energy Conference (ENERGYCON), 2018
A novel modification of DC-DC converter with a high voltage ratio is proposed. The converter cons... more A novel modification of DC-DC converter with a high voltage ratio is proposed. The converter consists of an input boost converter, bridge commutator and Dickson voltage multiplier. The circuit is characterized by a high voltage gain. An important advantage of the circuit is its practically rigid external characteristic in the continuous current mode (CCM). This is achieved by the absence of active power losses in the process of capacitors' recharging. An additional advantage of the proposed scheme is the low required capacitance of the voltage multiplier capacitors A detailed analysis of the proposed converters has been produced. The results of theoretical analysis are confirmed by the simulation in MATLAB/SIMULINK. Circuit verification has been made in a laboratory prototype with the output power 200W.
Abstract In recent years power quality monitoring tools are becoming a necessity, and many studie... more Abstract In recent years power quality monitoring tools are becoming a necessity, and many studies focus on detection and classification of Power Quality Disturbances (PQD)s. However, presently a core obstacle that prevents the direct comparison of such classification techniques is the lack of a standard database that can be used as a benchmark. In this light, we propose here an open-source software which enables the creation of synthetic power quality disturbances, and is designed specifically for comparison of PQD classifiers. The software produces several types of standard disturbances from the literature, with varying repetitions and random parameters of the labeled disturbances, and includes two reference classifiers that are based on deep-learning techniques. Due to the good performance of these classifiers, we suggest that they can be used by the community as benchmarks for the development of new and better PQD classification algorithms. The developed code is available online, and is free to use.
2014 IEEE International Energy Conference (ENERGYCON), 2014
The new principle of power maximizing of solar battery (MPPT) is proposed. The system based on a ... more The new principle of power maximizing of solar battery (MPPT) is proposed. The system based on a specific implementation of the PWM DC-DC converters, through which the solar battery is connected to the load. Instead of a linear carrier voltage, typically used in PWM systems, the special created periodic function plays a role of the carrier curve that is mathematically similar to the dependence of the solar panel output power on the duty-cycle of the DC-DC converter connected to it. The function is obtained by scanning a sample low-power solar panel with the special controlled current source. This sample solar panel is located in close proximity to the main battery, and thus its electrical characteristics identical to those of the main one. The maximum of the power curve, obtained in this way at each switching period, determines the value of duty cycle, which should be installed in the main DC-DC converter to achieve MPP. The proposed system is implemented using a simple scheme contained conventional electronic components. The system is characterized by high accuracy and speed. The results of computer modelling and testing of laboratory prototype confirm the theoretical conclusions.
2018 20th European Conference on Power Electronics and Applications (EPE'18 ECCE Europe), 2018
This paper presents a novel very high voltage gain DC-DC converter. Quadratic SEPIC converter inc... more This paper presents a novel very high voltage gain DC-DC converter. Quadratic SEPIC converter incorporated with switched-coupled inductor. The leakage energy of coupled inductor is transferred to the load. The study analyzes operation of the proposed circuit in continuous and discontinuous regimes and determines the boundary between the operation modes. The theoretical expectations are confirmed by the experimental results.
The following work describes an ongoing idea that becomes more logical in the future of domestic ... more The following work describes an ongoing idea that becomes more logical in the future of domestic and military electricity. This paper introduces the necessity for using a DC bus system in private homes as well as introducing an innovative bi-directional inverter for making the energy flow to and from the grid. The bi-directional inverter also enables smart control of the energy flow with harmonics cancelation, and the ability to be adjusted to the future demand of smart grids and multiple tariffs. The research also includes social aspects as an integrated subject in the control schemes of the
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Papers by Yuval Beck