The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Graph rigidity is an important property in multi-agent network for localization, formation control, and sensor fusion. In graph theory, a graph is minimally rigid if the removal of any edge results in a non-rigid graph. This work proposes distributed edge deletion algorithm that can enable to construct a minimally rigid graph. We discuss this problem for undirected multi-agent network with fixed topology...
This paper presents experimental results about loop closure detection in mobile robots through spectral description of images set and data dimensionality reduction. Both, spectral description and representation in low dimension depend heavily on the concept of dominant eigenvector. Integration between Matlab and ROS interface was exploited to perform our experiments. Besides, two environments were...
This paper presents a technological solution for designing an assistive device for a biomechanical study of the Sit-to-Stand movement (STS). This device targets people with disabilities following a stroke. The control algorithms are implemented in TwinCAT runtime environment. The communication between all the component and the control computer is ensured via the EtherCAT fieldbus. The aim of this...
This paper proposes a novel configuration of six phase IM to drive from a three phase stacked multilevel inverter. Apart from greater fault tolerance compared to three phase, a six phase machine enables the use of low voltage devices for the inverter. Also the inverter used here is a three phase nine level stacked inverter which itself uses low voltage devices. Thus MOSFETs can be used for the inverter...
This paper discusses a novel method to validate Sustainable Saturation Operation (SSO) of ferrite inductors in switching power supplies design. SSO is achieved when an inductor operates in partial saturation, with ripple current, power losses and temperature rise fulfilling reliability and efficiency requirements. Achieving inductors SSO permits to reduce the size of power supplies. The method presented...
The power conversion circuit of a three phase Vienna or Modular-Boost switching power factor corrected (PFC) rectifier uses three controlled switches, eighteen diodes and two output split capacitors. Three PFC controller circuits are necessary for conversion circuit's voltage regulation, power factor control and input current waveform improvement. The circuit has been modified to have fewer active...
This paper compares a non-isolated DC/DC converter (interleaved Buck/Boost) and an isolated converter (Dual Active Bridge) in a bidirectional charging application for Electric Vehicles. Both converters are modeled, controlled using small-signal models, and their operation in several modes is simulated and then compared. The results of the comparison using several criteria related to automotive applications...
In this paper, a stand-alone hybrid renewable energy system is proposed, which consists of solar PV, wind turbine, and energy storage with the combination of battery and hydrogen. This energy storage system partly relies on energy conversion through two components, electrolysis and fuel cell. When the hybrid system generates more electricity than load demand, hydrogen is produced via electrolysis...
Adoption of Battery Energy Storage Systems (BESSs) for provision of grid services is increasing. This paper investigates the applications of BESS for the grid upgrade deferral and voltage support of Medium Voltage (MV) distribution systems. A BESS is modelled in Matlab/Simulink to perform peak load shaving and voltage support service from the perspective of Distribution System Operators (DSOs). An...
A novel control strategy, named disturbance based control input design, is proposed in this study to improve the performance of Organic Rankine Cycle (ORC) system with unsteady heat source. ORC system for exhaust gas heat recovery of automobile engine is taken as the example. Conventional single variable and multiple variable control strategies are introduced briefly and compared with the proposed...
In this paper, a novel flicker-free ac/dc LED driver without electrolytic capacitor is presented. The driver comprises a single-stage boost-forward converter and a bidirectional buck-boost converter, which serves to bypass the low frequency ripple. Therefore, electrolytic capacitor is no longer needed. Compared with other electrolytic capacitor-less topologies, the proposed driver has the advantages...
Power system restructuring includes several new aspects in power system, especially in the area of transmission line protection. Therefore, in this paper transmission line protection (TLP) using distance relay and modelling of distance relay with analog antialiasing filter for TLP is presented, on the basis of several points of operational aspects, throughout the last decade. Protection system of...
Single stage converter system (SSCS) does both dc-dc conversion and dc-ac conversion in one stage. In this paper, a SSCS for photovoltaic (PV) applications is presented. This system can deliver active power from PV to the grid while continuously tracking maximum power point (MPP). The proposed system is controlled such that it can deliver/receive reactive power from grid. The presented system has...
This paper proposes a hybrid method for probabilistic wind power forecasting. The proposed approach consists of data classification, deterministic forecasting and probabilistic forecasting stages. In the data classification stage, a fuzzy k-means clustering algorithm is used to classify the historical time series of wind power into various wind classes. Several support vector regression (SVR) models...
In conventional photovoltaic microinverters configuration, a single PV module is connected to the grid through two converter stages: a step-up dc-dc stage and a step-down dc-ac stage. In the first stage, a high frequency transformer is generally used to achieve the high step-up voltage ratio conversion to a voltage above the grid peak value, reducing the converter efficiency while increasing its size...
This paper presents a step by step modeling of a new improved hybrid photovoltaic fed distributed static compensator (PV-DSTATCOM) in a-b-c reference frame. Further the system average model is transformed to orthogonal synchronous (d-q) reference frame. The new improved PV-DSTATCOM is used to compensate the current distortion and reactive power, generated by a non-linear three phase bridge uncontrolled...
Now a days, Superconducting fault current limiter (SFCL) is emerged as one of the most accomplished fault current limiter (FCL) In this Paper, a flux coupling type SFCL is designed for limiting the fault current in isolated wind turbine generation system. The proposed Resistive and flux Coupling based super conducting fault current limiters have improved performance in terms of current limitation,...
In this paper a generalized formulation for Selective Harmonic Mitigation Pulse Amplitude Modulation (SHM-PAM) has been presented to control Cascaded H-bridge (CHB) inverter with non-equal DC sources. Consistent with the proposed SHM-PAM technique, switching angles are attained constant while the calculated magnitudes of DC sources vary linearly for all modulation indexes (ma). In fact, in the SHM-PAM,...
This paper presents the electromagnetic design optimization for a 12-slot, 8-pole, concentrated winding, V-shaped magnet Interior Permanent Magnet Synchronous Motor (IPMSM) using a Genetic Algorithm (GA). Three distinct objective functions are considered. These include minimum weight, minimum loss, and a combined multi-objective function to minimize both the weight and the losses. The three optimized...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.