Relevant bibliographies by topics / Low voltage redundancy

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  1. Journal articles
  2. Dissertations / Theses
  3. Conference papers

Academic literature on the topic 'Low voltage redundancy'

Author: Grafiati
Published: 10 January 2023
Last updated: 28 January 2023

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Journal articles on the topic "Low voltage redundancy"

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Shin, Gicheol, Eunyoung Lee, Jongmin Lee, Yongmin Lee, and Yoonmyung Lee. "A Redundancy Eliminated Flip-Flop in 28 nm for Low-Voltage Low-Power Applications." IEEE Solid-State Circuits Letters 3 (2020): 446–49. http://dx.doi.org/10.1109/lssc.2020.3025667.

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Shi, Yong, and Zhuoyi Xu. "Wide Load Range ZVS Three-level DC-DC Converter: Modular Structure, Redundancy Ability, and Reduced Filters Size." Energies 12, no. 18 (September 15, 2019): 3537. http://dx.doi.org/10.3390/en12183537.

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In future dc distributed power systems, high performance high voltage dc-dc converters with redundancy ability are welcome. However, most existing high voltage dc-dc converters do not have redundancy ability. To solve this problem, a wide load range zero-voltage switching (ZVS) three-level (TL) dc-dc converter is proposed, which has some definitely good features. The primary switches have reduced voltage stress, which is only Vin/2. Moreover, no extra clamping component is needed, which results simple primary structure. Redundancy ability can be obtained by both primary and secondary sides, which means high system reliability. With proper designing of magnetizing inductance, all primary switches can obtain ZVS down to 0 output current, and in addition, the added conduction loss can be neglected. TL voltage waveform before the output inductor is obtained, which leads small volume of the output filter. Four secondary MOSFETs can be switched in zero-current switching (ZCS) condition over wide load range. Finally, both the primary and secondary power stages are modular architecture, which permits realizing any given system specifications by low voltage, standardized power modules. The operation principle, soft switching characteristics are presented in this paper, and the experimental results from a 1 kW prototype are also provided to validate the proposed converter.
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Malinowski, M. "Cascaded multilevel converters in recent research and applications." Bulletin of the Polish Academy of Sciences Technical Sciences 65, no. 5 (October 1, 2017): 567–78. http://dx.doi.org/10.1515/bpasts-2017-0062.

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Abstract Multilevel converters have been intensively investigated and developed since 1960s and have found successful industrial applications. The aim of this paper is to present state of the art as well as recent research and applications of cascaded multilevel converters, which are a very interesting solution for power distribution systems and renewable energy sources. Cascaded multilevel converters can easily operate at medium and high voltage based on the series connection of power modules (cells), which use standard low-voltage component configurations. Series connections of modules (cells) allow for high quality output voltages and input currents, reduction of passive components and availability of component redundancy. Due to these features the cascaded multilevel converters have been recognized as attractive solutions for high-voltage direct-current (HVDC) transmission, solid state transformers (SST) and photovoltaic (PV) systems.
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Yuldoshev, Isroil, Sanjar Shoguchkarov, Tulqin Jamolov, and Shakhnoza Rustamova. "Features of operation of the grid connected photovoltaic power station with a capacity of 10 kW." E3S Web of Conferences 216 (2020): 01172. http://dx.doi.org/10.1051/e3sconf/202021601172.

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Photovoltaic power station (PPS) operating function (without redundancy) with a nominal capacity of 10 kW connected to the low voltage electrical network established by "Zhejiang Chint Electrics Co Ltd" (PRC) under Tashkent conditions is defined. Operation parameters and characteristics of the PPS and parameters at the output of the network inverter are given. The deviations of voltage of each phase from the standard nominal voltage at the point of electric network transmission are studied. The analysis of the results of the evaluation of the power generation of the PPS for the conditions of clear weather and clear cloudiness was carried out. According to the monitoring data for the winter period is 2211,5 kW·h. The problems of PPS connected to the low-voltage network, connected to the loss of electric power with the account of influence of external factors and reliability of stable voltage and frequency in a permissible range are revealed.
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Dong, Bo, Yang Chen, Jing Lian, and Xiaohui Qu. "A Novel Compensation Circuit for Capacitive Power Transfer System to Realize Desired Constant Current and Constant Voltage Output." Energies 15, no. 4 (February 18, 2022): 1523. http://dx.doi.org/10.3390/en15041523.

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Capacitive power transfer (CPT) technique possesses the advantages of safety, isolation, low cost, and insensitivity to conductive barriers. To charge lithium-ion batteries, CPT should possess the output profile consisting of first constant current (CC) output and later constant voltage (CV) output. To fulfill the output profile, many power switches or compensation components are added in the CPT circuit, which is not expected due to the bulky size and additional losses. To reduce the redundancy of the CPT system, an Lx-PS CPT circuit with only five compensation components is proposed in this paper. After a systematic analysis and a parameter design procedure, the proposed CPT circuit can realize input ZPA at both CC and CV modes. In addition, the output current at CC mode and the output voltage at CV mode are all adjustable based on the charging demands of different loads. Finally, simulations are done to prove the analysis in this paper. Compared to previous research, the CPT circuit proposed in this paper can not only achieve the charging demands of lithium-ion batteries, but also reduce the redundancy of the whole system.
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Kim, Nam Sung, Stark C. Draper, Shi-Ting Zhou, Sumeet Katariya, Hamid Reza Ghasemi, and Taejoon Park. "Analyzing the Impact of Joint Optimization of Cell Size, Redundancy, and ECC on Low-Voltage SRAM Array Total Area." IEEE Transactions on Very Large Scale Integration (VLSI) Systems 20, no. 12 (December 2012): 2333–37. http://dx.doi.org/10.1109/tvlsi.2011.2173220.

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Zhang, Mengtian, Xianghua Huang, Shengchao Wang, and Liantan Luo. "In-the-Loop Simulation Experiment of Aero-Engine Fault-Tolerant Control Technology." Applied Sciences 12, no. 3 (February 7, 2022): 1716. http://dx.doi.org/10.3390/app12031716.

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Aeroengines are prone to failure due to their large range of working envelopes and bad working environments. Fault diagnosis and a fault-tolerant control strategy for aeroengines and control systems are important means to improve the reliability of aeroengine. In this article, the turbofan engine is taken as the research object, and the fault diagnosis and fault-tolerant control of an aeroengine control system are studied. First, based on the principle of component-level modeling and the algorithm of the extended Kalman filter, an adaptive turbofan model is established, and the adaptive effect of the model in the range of the full envelopment is verified by digital simulation. Next, based on the analytical redundancy provided by the adaptive model, sensor fault diagnosis and fault-tolerant control are studied. The low-voltage speed closed-loop control and EPR closed-loop control are designed, and the sensor fault-tolerant control based on analytic redundancy and the switching control rate is studied. The simulation results show that the filter based on the adaptive model can accurately locate and diagnose the sensor faults, and the sensor fault-tolerance based on the analytic redundancy and switching control rate can be effective fault tolerance for the sensor faults. Finally, as a hardware platform, this article selects MC203 VxWorks as an embedded system, the adaptive model for a turbofan engine as the research object, and has carried on the fault diagnosis and fault-tolerant control in the loop simulation experiment research; the experimental results show that the adaptive model can provide accurate analytical redundancy, and the real-time and fault tolerance of sensor fault effect is better.
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Mahmoudi, Morad, Abdellah El Barkany, and Ahmed El Khalfi. "Toward an Integrated Approach of HV and MV Circuit-Breakers Optimization Maintenance Planning and Reliability Assessment: A Case Study." International Journal of Engineering Research in Africa 29 (March 2017): 133–53. http://dx.doi.org/10.4028/www.scientific.net/jera.29.133.

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This paper investigates technical and organizational tools to improve maintenance planning performances. Indeed, maintaining a high level of reliability and availability of a Medium Voltage electrical network protection system such as the Medium Voltage and High Voltage circuit-breaker and its numerical protection relay at a low operating expenses cost is one of the most critical and challenging tasks for MV electrical distribution network operators. This work has mainly two goals. Firstly, to propose an operating expenses budget function that evaluates the Planned Scheduled Preventive Maintenance Policy combined with a Condition-based maintenance fora real series-parallel multi-assets MV electrical distribution system with active redundancy under the reliability and the maintenance frequency visits of these components. Secondly, to implement an integrated genetic algorithm approach in order to look for the optimal perfect and planned preventive maintenance scheduling policy and condition-based maintenance that minimizes the maximum operating expenses cost of the entire system.The method determines the optimal schedule of preventive maintenance actions based on minimization both reliabilty and operating expenses costs. Conclusions and recommendations for practice are made on the basis of obtained results.
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Pham, Khoa Dang, Quan Vinh Nguyen, and Nho-Van Nguyen. "PWM Strategy to Alleviate Common-Mode Voltage with Minimized Output Harmonic Distortion for Five-Level Cascaded H-Bridge Converters." Energies 14, no. 15 (July 24, 2021): 4476. http://dx.doi.org/10.3390/en14154476.

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High-frequency components of common-mode voltage (CMV) induce the shaft voltage and bearing current, which lead to premature failures in motors. In addition, due to non-zero average CMV, the low-frequency components of CMV, particularly the third-order harmonic component, have been reported to cause difficulties in common-mode filter design. Furthermore, the utilization of distant voltage vectors in the pulse-width modulation (PWM) with reduced CMV magnitudes gives rise to high output harmonic distortion compared to PWM ones without CMV reduction. In an attempt to solve the aforementioned issues, this article presents a PWM strategy that features reduced CMV magnitudes, zero average CMV, and improved output harmonic distortion for a five-level cascaded H-bridge (CHB) converter. In addition, the carrier rotation technique based on the phase-leg redundancy of the CHB topology is also combined with the proposed scheme to achieve equal power loss distribution among power switching devices. Both simulation and experimental results confirm that the proposed strategy produces better output harmonic distortion than that of POD-SPWM and APOD-SPWM under the condition of reduced CMV magnitudes, zero average CMV, and equal power loss distribution.
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Bai, Na, Liang Wang, Yaohua Xu, and Yi Wang. "Design of a Digital Baseband Processor for UHF Tags." Electronics 10, no. 17 (August 26, 2021): 2060. http://dx.doi.org/10.3390/electronics10172060.

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In this paper, we present a new digital baseband processor for UHF tags. It is a low-power and low-voltage digital circuit and adopts the Chinese military standard protocol GJB7377.1. The processor receives data or commands from the RF front-end and carries out various functions, such as receiving and writing data to memory, reading and sending memory data to the RF front-end and killing tags. The processor consists of thirteen main sub-modules: TPP decoding, clock management, random number generator, power management, memory controller, cyclic redundancy check, FM0 encoding, input data processing, output data processing, command detection module, initialization module, state machine module and controller. We use ModelSim for the TPP decoding simulation and communication simulation between tag and reader, and the simulation results meet the design requirements. The processor can be applied to UHF tags and has been taped out using a TSMC 0.18 um CMOS process.
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Dissertations / Theses on the topic "Low voltage redundancy"

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Bergquist, Hampus. "A self restoring system on low voltage level." Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-181804.

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Fortums electric grid in Norra Djurgårdsstaden is a test grid for smart equipment and they are investigating new techniques and ways to improve the quality of the grid. With the quality improvements that are researched, a "self-restoring system" is a part of the research with the intention to lower the amount of outages and shorten the time it takes to restore faults. This thesis can be seen as a part of the optimization process of the grid in Norra Djurgårdsstaden where the benefits with a basic self-restoring system have been investigated on low voltage level. In the thesis the self-restoring system has been classified into a "basic" and an "advanced" category. The basic self-restoring system cross-connect several feeding paths by cross-connecting different low voltage grids and use mechanical equipment to change between cables when a fault in a cable occurs. The advanced self-restoring system uses several feeders and smart grid technology with equipment and softwares which communicate and visualize the grid. The difference between the systems is that the advanced system can visualize the grid and is able to tell when and where faults have occurred to a more detailed level. The advanced system can also calculate the power available and does not need the same amount of cables for redundancy because it can command users to lower their consumption when an outage has occurred. A decision was made to only investigate the technique on low voltage level because a basic system already exists on medium voltage in Norra Djurgårdsstaden. Results show that investing in a basic self-restoring system in Norra Djurgårdsstaden would cost about 2 million SEK and lower the total amount of outages for the customers in the area from 45 minutes per customer and year down to about 41 minutes. The reason why the decrease is only four minutes per year and customer is because faults occurring on higher voltage level cannot be reduced with the system. It is totally about 10 % of the faults that occur on low voltage level. One conclusion from the thesis is that the reduction in quality costs which are because to the lowered outages will not be enough to pay back the investment. More outage-time per customer and year need to be prevented with the system or the customers need to value reduced outages significantly more.
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Khanaki, Razieh. "Integration of non-isolated converters in battery storage systems: Topology development, evaluation and optimisation." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/208259/1/Razieh_Khanaki_Thesis.pdf.

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This thesis examines topological variations of non-isolated DC-DC converters and their implications on design parameters and configurations of battery-integrated-converter systems. Furthermore, the opportunity of increased reliability with battery-integrated-converter systems is discussed with examples for both DC-DC and DC-AC converter applications, by taking into account the module voltage, redundancy level, scheduled maintenance and converter topology factors. Moreover, the optimisation and other practical trade-offs associated with the selection of the voltage rating of battery power modules (BPMs) in a battery-integrated-converter-system from an efficiency perspective is investigated.
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Kazim, Muhammad Anser. "Designing Smart Electrical Panels for Existing Wastewater Treatment Plants to Achieve Optimised Biogas Production and Cogeneration with HV/LV and Communication Redundancy for Smart Grid." Thesis, 2018. https://vuir.vu.edu.au/37856/.

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Recognising the deep potential in wastewater treatment plant (WWTP) automation strategies, this research focuses on expanding the plant operations in order to optimally utilise the produced biogas during the wastewater treatment process to achieve electricity cogeneration and High Voltage/Low Voltage (HV/LV) redundancy. The research has resulted in a proposed design for a smart Remote Terminal Unit (RTU). The proposed design also enables a failsafe mechanism at different levels of the water treatment process and biogas production thus facilitating an automated WWTP electricity cogeneration. The proposed design also increases the life span of substations, reduces power demand load on the grids and enhances safety of WWTP equipment during various scenarios of electricity cogeneration, shut downs and maintenance operations. Monitoring, operating and controlling of WWTPs is a complex and challenging task. The power equipment in most of the existing or old WWTPs that generates electricity from the biogas produced in the water treatment process requires intensive supervision and control to enable failsafe and redundant electricity cogeneration process. This research focuses on setting up an effective communication system between power equipment at existing or older WWTP distribution substations and power company`s zone substations, without the need to upgrade expensive switchgear and power equipment in the network. The proposed philosophy achieves automated and failsafe communication network for SCADA link to enable WWTP electricity cogeneration, utilising exiting or old infrastructure. This critical multidirectional power and data flow requires proper compliant and semantic data models to guarantee smooth and safe operations. It also requires to be flexible and have the ability to develop and implement the telemetric mapping philosophy between the substations during various scenarios of electricity cogeneration and faults. This research has resulted in a proposal of smart Remote Terminal Units (RTUs) on existing or old infrastructure of WWTP to achieve electricity cogeneration with integrated renewable energy resource
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Conference papers on the topic "Low voltage redundancy"

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Ferreira, Victor, Markus Andresen, Braz Cardoso, and Marco Liserre. "Active Redundancy in the Low Voltage Stage of Smart Transformers." In 2018 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE, 2018. http://dx.doi.org/10.1109/ecce.2018.8557686.

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Salehi, Mohammad, Mohammad Khavari Tavana, Semeen Rehman, Florian Kriebel, Muhammad Shafique, Alireza Ejlali, and Jorg Henkel. "DRVS: Power-efficient reliability management through Dynamic Redundancy and Voltage Scaling under variations." In 2015 IEEE/ACM International Symposium on Low Power Electronics and Design (ISLPED). IEEE, 2015. http://dx.doi.org/10.1109/islped.2015.7273518.

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Haoliang Li, Jianhao Hu, and Jienan Chen. "A novel low-power filter design via reduced-precision redundancy for voltage overscaling applications." In 2013 IEEE Global Communications Conference (GLOBECOM 2013). IEEE, 2013. http://dx.doi.org/10.1109/glocom.2013.6831578.

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Zhou, Shi-Ting, Sumeet Katariya, Hamid Ghasemi, Stark Draper, and Nam Sung Kim. "Minimizing total area of low-voltage SRAM arrays through joint optimization of cell size, redundancy, and ECC." In 2010 IEEE International Conference on Computer Design (ICCD 2010). IEEE, 2010. http://dx.doi.org/10.1109/iccd.2010.5647605.

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Mota, Daniel dos Santos, Erick Fernando Alves, Santiago Sanchez-Acevedo, Harald G. Svendsen, and Elisabetta Tedeschi. "Offshore Wind Farms and Isolated Oil and Gas Platforms: Perspectives and Possibilities." In ASME 2022 41st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/omae2022-80645.

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Abstract Single-cycle gas turbines operating at low-efficiency ranges due to redundancy concerns in offshore oil and gas platforms are responsible for considerable amounts of nitrogen oxides and greenhouse gas emissions in some countries. The abundant resource of offshore wind energy constitutes an extraordinary opportunity for reducing such emissions. However, new challenges are introduced when gas-powered generation is partially replaced by wind power. This paper investigates the possibilities provided by a centralized hybrid energy storage system (ESS) for addressing these challenges. It reviews frequency control concepts for isolated grids and discusses the analogous problem of power balancing within the ESS itself. A set of structures for control of the grid frequency and the ESS DC voltage are described and evaluated. All illustrated by results obtained within the frameworks of the Innovative Hybrid Energy System for Stable Power and Heat Supply in Offshore O&G Installation Project and the LowEmission Research Centre.
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Garcia-Leyva, L., A. Calomarde, F. Moll, and A. Rubio. "Novel redundant logic design for noisy low voltage scenarios." In 2013 IEEE 4th Latin American Symposium on Circuits and Systems (LASCAS). IEEE, 2013. http://dx.doi.org/10.1109/lascas.2013.6519010.

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Anderson, Bruce N. "Modular Solar Systems for 24/7 Scalable, Flexible, Affordable Electricity." In ASME 2017 Power Conference Joint With ICOPE-17 collocated with the ASME 2017 11th International Conference on Energy Sustainability, the ASME 2017 15th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2017 Nuclear Forum. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/power-icope2017-3155.

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A successful transition to a low carbon future requires that power be generated all of the time, 24/7, not just when the sun is shining. But few clean emissions power technologies can operate 24/7. Concentrated solar power (CSP) can because it can store thermal energy at 10–20% of the cost of batteries1 and can then burn fuel when its solar resource is exhausted. However, many see first generation CSP as too costly, complex, risky, and economical only at utility scale. Alternatively, by mimicking the all-factory, standardized, modular approach of wind and PV, next generation CSP with low-cost dry thermal storage (e.g., firebrick, not molten salts), and using no water/steam (just hot air) may give CSP the potential to fulfill on its promise of baseload affordability. This technical paper summarizes an Engineering and Cost Feasibility Study2 funded by the US Department of Energy as well as presents a new breakthrough power generation product based on the Brayton power tower system called 247Solar Plants™. Design, construction, and operation are all simplified with greatly reduced costs and increased deployment speeds. Such modular CSP systems can be installed as single units or 100s of modules at utility scale. The microturbines used by the system stabilize grids by responding nearly instantly, similar to battery response time, to changing power demands and voltage fluctuations, while offering dispatchable, reliable electricity. The redundancy of multiple modules in a single project increases capacity factor, operational flexibility, and project reliability. The DOE Study shows that such a system may be able to achieve the two key DOE targets included: 1) a capacity factor of at least 75%, of which >85% would be solar with <15% from fuels; and LCOE3s <9ȼ/kWh. Indeed, LCOEs under 6ȼ/kWh may be possible with further development and widespread deployment.
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Persson, Martin, Soren Petersen, and Bjarne Soderberg. "Efficient 200W Low Voltage DC/DC for Redundant On-Board Processing Systems." In 2019 European Space Power Conference (ESPC). IEEE, 2019. http://dx.doi.org/10.1109/espc.2019.8932052.

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Huang, Yingna, and Hailong Jiao. "An Ultra-Low-Voltage Single-Phase Adaptive Pulse Latch with Redundant Toggling Elimination." In 2020 IEEE 15th International Conference on Solid-State & Integrated Circuit Technology (ICSICT). IEEE, 2020. http://dx.doi.org/10.1109/icsict49897.2020.9278018.

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Arroyos, Marina Roche, Javier Arturo Corea Araujo, Didac Sabria, Vinayak Padmaji, Pablo Cano, and Patrice Garmier. "Model based component co-optimization and scalability of virtual testing for electric drivetrain vehicle." In FISITA World Congress 2021. FISITA, 2021. http://dx.doi.org/10.46720/f2021-dgt-045.

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"Within the automotive product development cycle virtual and heterogeneous testing is becoming increasingly established through component, module and vehicle-level simulation. Though a number of standards in this field have been established, models are still mostly created in a fragmented manner: using domain-specific tools to create, manage and execute simulations without standardization of the content of the functional interfaces (FMI does only standardize the format) and limited scalability. This fragmentation leads to a lot of redundant effort as models of the same component or system are re-created several times. HIFI-ELEMENTS project addressed this fragmentation through two main mechanisms: Firstly, developing, validating and publishing a recommendation for standardization of model interfaces for common e-drive components (e-machine, inverter, battery, DC/DC converter, thermal management) and implementation of compliant versions of existing models. Secondly, implementing a seamless workflow linking extended versions of existing tools with effort-saving automated methods for model parameterization and test case generation. This seamless integration will substantially increase the number of integrations and test cases that can be early validated through simulation, leading to optimized efficiency designs and development effort reduction. The standardization also guarantees scalability among fidelity levels, from concept design to XiL through detailed modelling. In this paper we present the results of the Use Case C: Component co-optimization. The purpose of use cases is the demonstration of the advantages of the standardized models and workflow industry relevant scenarios. The work content performed in the use case is very extensive and multidisciplinary. In the first step, the high fidelity models from the expert components developers were validated independently with automated testing tools and later integrated to create a complete vehicle architecture integration. The standardization permitted to seamlessly test several component variants developed within the project for the same architecture, including tens of motor models with different technologies, inverters and high voltage converters with different IGBT technology and various battery packs. This possibility was exploited through co-optimization with multi objective Genetic Algorithm, permitting to select the optimal component combination, powertrain architecture (with and without high voltage DCDC converter) and components parametrization considering the trade-off of consumption and performances. The optimized and baseline variants were used to demonstrate the scalability of the models to different simulation objectives. The model was co-simulated with a traffic simulation environment in order to evaluate the impact of eco-driving recommendation algorithms in a realistic driving situation. The optimized solution was also validated against a wide database of driving conditions including real driving cycles, performance and vehicle dynamics. Finally, the integrated models were seamlessly transferred to real time simulation platform for Model-in-the-Loop testing with a simulated 3D environment aimed at ADAS testing. Real-time capability demonstrates that next steps such as Driver-in-the-Loop and Hardware-in-the loop can be achieved smoothly. The extensive simulation activities performed in this use case demonstrate the benefits of the standard in models exchangeability and effort reduction in model based development. This project received funding from the European Union’s (EU) Horizon 2020 Research and innovation program under grant agreement N 769935."
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