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High proportion of renewable energy was increased in the distribution network, which will face complex grid complex test and show the scale the diversity and complexity of the operating state. So that the evolution of Wind-photovoltaic-energy storage(Wind-PV-ES) hybrid network transient process is not clear. In the other hand, Transient simulation tool plays a significant role in obtaining a full...
The paper presents novel tools for model-based control system design based on FMI/FMU standard (Functional Mock-up Interface / Unit). It is focused on application of FMI standard for easy integration of control system development cycle starting with Model-in-the-Loop (MIL) simulation and finishing with Hardware-in-the-Loop (HIL) simulation. It is shown, how the Functional Mock-up Units (FMU) containing...
An autonomous DC microgrid system with triple-active bridge (TAB) converters as power-routing units has been proposed. To investigate the next-generation smart grid in which each port has loads, batteries, or energy resources and multiple TAB converters connect to each other, it is necessary to construct a computer simulation model of a TAB converter using a typical power electronics simulator. In...
In this paper, we propose a scalable routing and admission control model for Software Defined Networks (SDN). We use pre-established multi-path (PMP) model to increase routing scalability and reduce admission control time.
The main objective of this contribution is to present a nonlinear maximum power point tracking (MPPT) controller for photovoltaic (PV) systems based on a two-diode model of a PV module. The proposed MPPT technique operates in conjunction with a Z-source dc-dc converter as an interface between a PV system and a load. The scheme of the proposed nonlinear MPPT controller consists of the design of a nonlinear...
In this paper, we introduce an approach for a fast assessment of the dynamic characteristics of system frequency during the period of cold load pickup following a large-scale blackout. The approach is developed based on a load model and a model of generation control system: the load model con-siders the unique time-dependent characteristic of inrush power surges during the period of cold load pickup,...
An improved included angle division method is proposed for Hammerstein systems. In this division method, nonlinearity of the system is taken into account to distribute gridding points, so distribution is more reasonable and computation load in division is reduced greatly. Based on the division result, a multimodel predictive controller is designed to overcome the drawbacks of the common nonlinearity...
A simulator of the upgradable shunting locomotive's power portion is under consideration. It is based on the National Instruments firmware. The simulator includes real-time math models of the electric drive's power portions, which were created based on the field-programmable gate array (FPGA). Real-time math models consist of three sets of DC/DC converters, six DC motors and a driven locomotive. The...
This paper presents a conventional DC-DC boost converter for low and wide voltage supply range, suitable for energy harvesting purpose. The output voltage can be increased by controlling the transistor switching frequency, duty cycle, inductance, load capacitor, rise, and fall time. Both computer simulation and experiment results are performed in details. Experiment results have shown an error less...
Many various mechanical systems such as robotic arms, conveyer drives, multimass systems contain flexible joints. Because of described feature these objects are vulnerable for oscillations. To reduce its occurrence input shaping method might be used. The algorithm of input shaping is very simple to use, provides good effects and doesn't require the changes in control loop. The algorithm's work is...
This paper addresses control and scheduling codesign problem for multiple control loops sharing a common communication and computation medium, known also as networked embedded control system (NECS) in literature. Besides the limited communication medium, physical limitations on control inputs and/or states are considered as well. To avoid unnecessary use of the limited communication medium, each control...
Solid Oxide Fuel Cells (SOFC) can serve a large variety of both mobile and stationary applications. In comparison with proton exchange membrane fuel cell technology they have higher efficiency and certain other advantages. However if their potential is to be fully exploited, tighter control is needed because of the SOFC sensitivity to high temperature and fuel utilization variations resulting from...
The converter is a power supply which controls the opening and closing time ratio of the switching tube in the use of modern power and electronic technology to maintain a stable output voltage. The converter generally consists of the composition of IC, MOSFET and Pulse Width Modulation (PWM). With the development and innovation of power electronic technology, converter technology has been also constantly...
In this study, a nonlinear system is controlled using a linear adaptive method. A nonlinear system is approximated a linear model at each operating point, and a control law is designed based on the approximated linear model. To obtain a suitable linear model at each operating point, many linear models are simultaneously identified. However, the computation load for identifying many models is considerably...
Tank situation display system is a basic component of the tank integrated simulator. This paper describes the design process of virtual instrument for tank integrated simulator based on LabWindows. The hardware architecture and diagrams of system are introduced first. The software module architecture and design development process are given later. The research of several key issues is focused on,...
In this paper, we describe major steps to build a supply chain simulation reference model for the semiconductor industry. We start by identifying requirements for such a reference model. Then we identify the main building blocks of the model. We present a technique to deal with load-dependent cycle times in single front-end and back-end facilities and in the overall network to reduce the modeling...
To destroy a country's physical electric power infrastructure by attacking its control system through cyber means, has become an important way to weaken a country's war power. Along with the construction of next generation smart grid, development of the internet of things and appearance of system of systems(henceforth, SOS) warfare based on information systems, the complicated control networks system...
The correct designing of today's logistic systems has become an increasingly cumbersome process, especially due to their growing sizes and heterogeneities. While simulation methods provide a means to validate the functional behavior of logistic systems, formal methods allow for proving that the system completely fulfills its specification. This paper presents a novel approach to the formal verification...
The multimodel and multicontrol approaches are two powerful techniques which are often useful in literature, to the analyse, the modeling and the control of complex systems. Indeed, the operating range of the process is partitioned into a set of operating regions. For each operation region a local model or/and controller is applied. The effective control applied to the process is a fusion of all these...
The multi-function loader is a complex system in which mechanical, electronic, hydraulic and control systems are assembled. It has a significant multi-disciplinary coupling characteristic. The traditional single-domain modeling simulation tools can not do the simulation and optimization of overall performance for modern complex products. In view of this situation, the paper studied the modeling methods...
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