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.
In this paper, a concept is presented for simplifying and accelerating the development and testing process of a Permanent Magnet Synchronous Machine (PMSM), or its control unit, without utilizing any actual electric machine. The proposed Permanent Magnet Synchronous Machine Emulator (PMSME) utilizes the Power-Hardware-In-the-Loop (PHIL) concept to reproduce the mechanical and electrical characteristics...
The simulation of transmission and distribution grids comes with a trade-off between the number of modeled components and the modeling depth on the one hand and the simulation speed on the other hand. An example system of a grid converter of a 2 MW full scale converter system is used to show a step-by-step model order reduction. Starting from a detailed switched model the order reduction is shown...
Edge cloud computing is a trending paradigm, which extends cloud computing by additionally utilizing computing resources at the network edge, e.g., at mobile base stations. Especially personalized services can be instantiated or migrated close to end users, which improves the latency and supports user mobility. However, the placement of the service chains is crucial for the performance of the services...
In this paper, we provide a systematic design procedure for the construction of the controller of the affine nonlinear discrete-time studied systems. The proposed controller structure achieves the tracking of given reference trajectory even in the presence of external disturbances. It is based on the Internal Model control structure and the multimodel strategy when considering the fusion techniques...
The simulation of current source modular multilevel converter (CSMMC) based systems with large number of submodules require significant computational efforts. In this paper, a simplified model of CSMMC is developed to reduce the computational complexity while maintaining the accuracy of the traditional detailed model. The model is constituted using controlled current sources in each arm of the converter...
This work investigated nine popular integration algorithms and simulated the DC-DC boost converters, with and without parasitic elements, operating in continuous conduction mode (CCM). The off-line simulations were performed under the Matlab environment. The methodology consisted of firstly, deriving the state-space model of the converter and then deriving its small-signal average model. The average...
In this paper, a novel design of variable reluctance type linear ferrofluid pump is proposed. The design is based on the concept of axial pressure gradient of ferrofluid in an external magnetic field. The pump is actuated by two phases of switched DC magnetic field. The conceptual design development of the pump is discussed in detail. The proposed design is modeled and simulated in terms of its equivalent...
Fast switching fluid power valves set strict requirements on performance, size and energy efficiency and simulation models are therefore needed to obtain good designs of such components. The valve moving member is subject to fluid forces depending on the valve flow rate and movement of the valve member itself. These fluid forces may be accurately simulated using Computational Fluid Dynamics (CFD)...
This paper presents an average-value model of a line commutated converter-based HVDC system using dynamic phasors. The model represents the low-frequency dynamics of the converter and its ac and dc systems, and has lower computational requirements than a conventional electromagnetic transient (EMT) switching model. The developed dynamic-phasor model is verified against an EMT model of the CIGRE HVDC...
This paper discuss as the dynamics of a SMPS can be investigated by recurrent neural network (RNN) based models with an Hamiltonian formulation and function used for the training, so leading to a novel paradigm that we call RNNHT model. By using the calculated state variables in a boost converter a RNN is trained by considering also the minimization of the energy stored according to a defined cost...
This paper presents a comprehensive modeling, simulation and computational implementation of buck converter. Four modeling approaches of buck converter including mathematical, circuitry, transfer function and state space modeling are presented. Each modeling approach is demonstrated with various computational implementation methods including graphical, functional block and text based programming in...
Modeling of the DC-DC converter with capacitor Equivalent Series Resistance (esr) is considered in this paper. The operation of the converter in the continuous conduction mode is assumed. The modeling of the converter is based on the state-space averaging technique. The small ripple approximation is assumed in deriving the small-signal linear model of the converter. From the result the small-signal...
In this paper, the switching flow-graph models are developed to study the nonlinear behavior of DC-DC switching converters. Based on the concept of virtual switches and virtual switching functions, switching flow-graph (SFG) model are created easily without complex mathematics. The SFG modeling technique is helpful for undergraduate students or beginners to understand how the switching converters...
In this study, we propose a coding method for enabling a huge number of agents in a social simulation such as minority game. The minority game is a game when participants (or agents) win when they select a group with a smaller number of participants. Using our coding method, we successfully implements the minority game with more than a hundred million agents. From our simulation results, we observed...
This paper presents a procedure of pre-characterization dedicated to the logic and timing simulation of IR-drop induced delays in a logic Block Under Test (BUT) embedded in a chip. The proposed pre-characterization is twofold: the pre-characterization of the library on the one hand and the pre-characterization of the power grid on the other hand. Both should be computed only once for a given technology...
Cloud computing is a consolidation environment that hosts heterogeneous applications. Currently, clouds use virtualization technologies to provide an isolated execution environment and agile resource provisioning. Furthermore, live migration is widely exploited to achieve energy saving. However, consolidation and live migration can cause resource contention and utilization overhead that influence...
Traditional fault calculation techniques are not capable of accurately modelling the short-circuit behaviour of inverter interfaced distributed generation (IIDG). As the share of IIDG continues to rise, more accurate fault simulations are required. This paper gives an overview of fault calculation techniques described in literature. All techniques are evaluated from the viewpoint of protection studies...
Performance prediction for the high performance computer system is of great importance for designing, implementing, and optimizing system. As a widely used technique for predicting performance, simulation method attracts more and more attention from the research community. Based on analyzing the problems in the current performance simulation techniques, we present a key idea of the performance simulator...
A modified converter is proposed and analyzed to drive an inverter of a electric vehicle. The ratio of an output voltage to an input voltage of the proposed converter is equal to that of the general boost converter. The difference between both converters comes from the composition of output terminal. Owing to the discrepancy, working voltage of the output capacitor of the proposed converter becomes...
This work presents a Model Predictive Control (MPC) strategy for a Voltage Source Inverter (VSI) used in a three-phase Uninterruptible Power Supply (UPS) for critical loads. An MPC using continuous variables is proposed for solving this problem and the output of the controller is used as the reference voltage to be generated by a PWM modulator. The solution of this unconstrained MPC gives rise to...
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.