This paper concentrates on the new arising protection problems in modern distribution grids due to the large-scale penetration of distributed generation (DG). Specifically, hardware-in-the-loop (HIL) simulations for t...
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ISBN:
(纸本)9781510814097
This paper concentrates on the new arising protection problems in modern distribution grids due to the large-scale penetration of distributed generation (DG). Specifically, hardware-in-the-loop (HIL) simulations for the two major impacts of DG on existing protective schemes, namely protection blinding and sympathetic tripping, will be presented. A simplified five bus distribution network, consisting of two feeders protected by two numerical overcurrent relays, will be simulated in the real time digital simulator (RTDS), established in the electric energy systems laboratory of the National Technical University of Athens. Secondary injection tests will be carried out, by means of the RTDS, via the low-level interface of the digital multifunction relays, which are responsible for the feeders' protection. Finally, the simulation results will be demonstrated and analyzed.
The complexity of industrial process brings some problems such as modeling difficulty to traditional monitoring process methods. Aiming at the requirement of automatic operation and safety monitoring of hardware-in-th...
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ISBN:
(纸本)9781665440899
The complexity of industrial process brings some problems such as modeling difficulty to traditional monitoring process methods. Aiming at the requirement of automatic operation and safety monitoring of hardware-in-the-loop simulation experiment of aircraft control system, a data-driven automatic operation experiment system is designed and implemented. The data-driven automatic operation experiment system includes temperature measuring safety monitoring module and whole process power supply program control module, using multivariate statistical monitoring method in order to realize the monitoring of process data with high adaptability. Real-time temperature information is collected and uploaded in the complexity of process. According to the experiment flow, each power supply and management computer is controlled to realize the remote automatic control of power supply. The experiment results show that the system can upload and collect temperature data quickly, automatically complete the experiment according to the experiment procedure, and has good real-time performance and high degree of automation.
In order to investigate the operating performance of the distributed source inverter under the grid fault, this paper presents the design and implementation of a special Grid-Fault Emulating Power Supply (GFEPS) based...
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ISBN:
(纸本)9781479976577
In order to investigate the operating performance of the distributed source inverter under the grid fault, this paper presents the design and implementation of a special Grid-Fault Emulating Power Supply (GFEPS) based on the hardware-in-the-loop simulation, which can emulate wide scope of grid faults, such as voltage dip, unbalance, harmonic distortion, frequency drift, phase angle jumping and etc. It is modified simplicity and smoothly through the RTDS, and design the circle and controller of the power interface which is the important role in GFEPS. Finally, the experimental results are presented to validate the simplicity, flexibility and high reliability of the design and implementation of the GFEPS.
This paper introduces the principles, construction and application of a novel real-time hardware-in-the-loop simulation (RT-HILS) platform. The RT-HILS consist of a PC to display the simulation result and calculate th...
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ISBN:
(纸本)9781424416653
This paper introduces the principles, construction and application of a novel real-time hardware-in-the-loop simulation (RT-HILS) platform. The RT-HILS consist of a PC to display the simulation result and calculate the model, a HIL board to generate the analogue signals and measure the output of the target ECU, and a USB-CAN card to implement CAN (Controller Area Network) communication. Multi-thread technology is used to control the models' calculation step to guarantee its real-time characteristics. The CAN with the speed of 500Kbit/s is also important to real time simulation. The models and communication functions are cooperated into the LabView by its DLL node. The RT-HILS platform has applied to the diesel engine controller and hybrid vehicle controller. An example of the application of RT-HILS to the development of HCU (Hybrid Control Unit) is presented to show the functions of RT-HILS.
hardware in the loop (HIL) simulation enables experimental study of prototype hardware systems or control algorithms via real-time interaction between physical hardware and virtual simulations. As a result, this metho...
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ISBN:
(纸本)9781424422227
hardware in the loop (HIL) simulation enables experimental study of prototype hardware systems or control algorithms via real-time interaction between physical hardware and virtual simulations. As a result, this method is a particularly valuable tool for hybrid vehicle powertrain analysis. In the case where novel or prototype hardware is being examined, it is often necessary to scale the signals in and out of the prototype system in order to represent production-sized components. This scaling process is usually done in an ad-hoc manner. In this work, a formal method is presented that derives appropriate input/output signal conditioning to correctly scale electric vehicle components, namely the electric motor and battery subsystems.
The hardware-in-the-loop (HIL) simulation is an attractive and effective approach to simulate the contact dynamics of flying objects in space. However, the HIL contact simulation is very difficult due to the simulatio...
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Faced with the need to reduce development time and cost in view of additional system complexity driven by ever more stringent emission regulations, the hardware-in-the-loop (HiL) simulation increasingly proves itself ...
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Faced with the need to reduce development time and cost in view of additional system complexity driven by ever more stringent emission regulations, the hardware-in-the-loop (HiL) simulation increasingly proves itself to be an advantageous tool not only in automotive companies but also in the off-road engine industry. The approach offers the possibility to analyze new engine control systems with fewer expensive engine dynamometer experiments and test drives. Thus, development cycles can be shortened and development costs reduced. This paper presents the development of an Internal Combustion Engine (ICE) and the correspondent Exhaust Aftertreatment System (EAS) model, its deployment on a HiL system and its application to pre-calibrate the engine for different vehicle cycles. A zero-dimensional mean value approach was chosen to guarantee adequate real-time factors for the coupling between the models and the Engine Control Unit (ECU). The main components of the airpath were parametrized according to data provided by the supplier and measurements. The combustion and NOx Engine-Out emissions were modeled using AVL-CRUISEMTM/MoBEOTM libraries, combining physical and empirical approaches, to reach an optimal trade-off between computational cost, accuracy, predictivity. For the other emission constituent, empirical correlations were obtained, and fed with simulated inputs to improve the accuracy in transient cycles. The quasi-dimensional aftertreatment model was parametrized using both synthesis gas test-bench and engine test bed measurements. The results for engine performance and emissions produced satisfactory agreement with both steady-state and transient measurements. Therefore, the presented methodology shows a great potential for testing and validation of new engine calibrations, as analyzed in a reference cycle described in detail. Besides, the use of this simulation method gives the opportunity to verify and optimize the behavior of the propulsion and exhaust aftert
hardware-in-the-loop simulation technology plays an important role in the flight performance and safety test of UAV flight control system. The hardware-in-the-loop simulation method can excavate the potential faults o...
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In this article, we study the voltage regulation problem for an inverter-interfaced power distribution network that is subject to possible adversarial injections and/or severe fault scenarios. Different from the curre...
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Commissioning is a critical process in the lifecycle of production plants. Above all the commissioning of the electrical system and the control technology is often very complex. Reasons for it are software errors in t...
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ISBN:
(纸本)9780889866638
Commissioning is a critical process in the lifecycle of production plants. Above all the commissioning of the electrical system and the control technology is often very complex. Reasons for it are software errors in the controller. One possibility to disclose and to remove these errors already in the early stages of the development is hardware-in-the-loop simulation (shortly: HiL). Because of model inaccuracies between model and specification as well as between model and real plant, it is unlikely to find all errors in the controller software solely with HiL simulation. But even one failure in the controller may cause critical machine states and damaging parts of the production plant. Thus in this paper a new approach for improving the commissioning of production plants is described. This approach, called Hybrid Commissioning, is an incremental procedure for commissioning, which begins with a HiL simulation, goes on with a mixture between reality and simulation and ends up with the commissioning of the real production plant.
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