The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform

Yanjun Zhao - One of the best experts on this subject based on the ideXlab platform.

  • a 400 v 50 kva Digital physical hybrid real time Simulation platform for power systems
    IEEE Transactions on Industrial Electronics, 2018
    Co-Authors: Feng Leng, Junlin Li, Shuoting Zhang, Lidong Zhang, Ran Mo, Dan Wang, Jie Zeng, Xun Chen, Ranran An, Yanjun Zhao
    Abstract:

    Power system Simulation is an important means to study the dynamic behavior, to ensure the safety and stability, and to optimize the operation of a power grid. Pure physical Simulation and Digital Simulation have their own advantages and disadvantages. A three-phase four-wire hybrid Simulation platform integrating the advantages of both the Digital Simulation and physical Simulation is developed by combining the physical Simulation system and real-time Digital simulator. The platform is rated at 400 V and 50 kVA with the short-circuit capacity of 500 kVA and can supply ten times the rated current to support the Simulation of various short-circuit faults. An improved interface algorithm based on an ideal transformer model is proposed to extend the stability region of a hybrid Simulation. Hybrid Simulation experiments are conducted under two cases, and the comparison with the Digital Simulation demonstrates the performance of this platform and the potential applied to a modern power system. This platform has been equipped in a key laboratory of smart power grid technology.

Bao Tie - One of the best experts on this subject based on the ideXlab platform.

  • alternating current direct current power grid operation characteristic show equipment based on real time Digital Simulation of rtds
    2015
    Co-Authors: Cai Haiqing, Guo Qi, Jia Xudong, Han Weiqiang, Wu Wencong, Guo Jian, Wang Baoshi, Bao Tie
    Abstract:

    Alternating current-direct current power grid operation characteristic show equipment based on the real-time Digital Simulation of RTDS is provided with the Simulation work station who establishs alternating current-direct current power network model, real-time Digital Simulation ware, protocol conversion card, switch and electric wire netting characteristic display device, real-time Digital Simulation ware passes through the protocol conversion card, returns operation control command through the protocol conversion card to real-time Digital Simulation ware through the switch to electric wire netting characteristic display device analog output volume and Digital quantity, electric wire netting characteristic display device through the switch also have transient state data processor, transient state data processor is provided with transient state data extraction ware and converter, and electric wire netting characteristic display device is provided with the transient state database, and the variable database is looked for and is mated unit and playback show unit the utility model discloses can realize the show directly perceived of power grid operation characteristics such as stable state data and transient state data, dependable performance, simple and practical

  • display system and display method for operating characteristics for alternating current and direct current power grid based on rtds real time Digital system real time Digital Simulation
    2015
    Co-Authors: Cai Haiqing, Guo Qi, Jia Xudong, Han Weiqiang, Wu Wencong, Guo Jian, Wang Baoshi, Bao Tie
    Abstract:

    The invention discloses a display system and a display method for operating characteristics for an alternating-current and direct-current power grid based on RTDS (real-time Digital system) real-time Digital Simulation. The display system is equipped with a Simulation workbench for establishing an alternating-current and direct-current power grid model, a real-time Digital simulator, a protocol conversion card, an interchanger and a power grid characteristic display device; the real-time Digital simulator is used for outputting analog amount and Digital amount to the power grid characteristic display device through the protocol conversion card and the interchanger; the power grid characteristic display device is used for returning an operation control order to the Digital simulator in real time through the interchanger and the protocol conversion card. The display system further comprises a transient data processing unit which is equipped with a transient data extracting unit and a conversion unit; the power grid characteristic display device is equipped with a transient database, a variable database, a searching mapping unit and a replay display device. The display system can be used for realizing visual display of power grid operation characteristics of steady state data, transient data and the like, is reliable in performance, simple and practical.

Georg M Schmolzer - One of the best experts on this subject based on the ideXlab platform.

  • Digital Simulation improves maintains and helps transfer health care providers neonatal resuscitation knowledge
    Frontiers in Pediatrics, 2021
    Co-Authors: Simran K Ghoman, Maria Cutumisu, Georg M Schmolzer
    Abstract:

    Purpose: To safely care for their newborn patients, health-care professionals (HCP) must undergo frequent training to improve and maintain neonatal resuscitation knowledge and skills. However, the current approach to neonatal resuscitation Simulation training is time and resource-intensive, and often inaccessible. Digital neonatal resuscitation Simulation may present a convenient alternative for more frequent training. Method: Fifty neonatal HCPs participated in the study (44 female; 27 nurses, 3 nurse practitioners, 14 respiratory therapists, 6 doctors). This study was conducted at a tertiary perinatal center in Edmonton, Canada from April–August 2019, with 2-month (June–October 2019) and 5-month (September 2019–January 2020) follow-up. Neonatal HCPs were recruited by volunteer sampling to complete a demographic survey, pre-test (baseline knowledge), two Digital Simulation scenarios (intervention), and post-test (knowledge acquisition). Two months later, participants repeated the post-test (knowledge retention). Five months after the initial intervention, participants completed a post-test using a table-top Simulation (knowledge transfer). Longitudinal analyses were used to compare participants' performance over time. Results: Overall the proportion of correct performance increased: 21/50 (42%) passed the pre-test, 39/50 (78%) the post-test, 30/43 (70%) the 2-month post-test, and 32/40 (80%) the 5-month post-test. GLMM and GEE analyses revealed that performance on all post-tests was significantly better than the performance on the pre-test. Therefore, training with the RETAIN Digital Simulation effectively improves, maintains, and transfers HCPs' neonatal resuscitation knowledge. Conclusions: Digital Simulation improved, maintained, and helped transfer HCPs' neonatal resuscitation knowledge over time. Digital Simulation presents a promising approach for frequent neonatal resuscitation training, particularly for distance-learning applications.

  • unsupervised machine learning algorithms examine healthcare providers perceptions and longitudinal performance in a Digital neonatal resuscitation simulator
    Frontiers in Pediatrics, 2020
    Co-Authors: Simran K Ghoman, Maria Cutumisu, Georg M Schmolzer
    Abstract:

    Background Frequent Simulation-based education is recommended to improve health outcomes during neonatal resuscitation, but is often inaccessible due to time, resource, and personnel requirements. Digital Simulation presents a potential alternative, however its effectiveness and reception by healthcare professionals (HCP) remains largely unexplored. Objectives This study explores HCPs’ attitudes towards a Digital simulator, technology, and mindset to elucidate their effects on neonatal resuscitation performance in Simulation-based assessments. Methods The study was conducted from April-August 2019, with 2-month (June-October 2019) and 5-month (September 2019-January 2020) follow-up at a tertiary perinatal centre in Edmonton, Canada. Of 300 available neonatal HCPs, 50 participated. Participants completed a demographic survey, pre-test, two practice scenarios using the RETAIN neonatal resuscitation Digital Simulation, post-test, and attitudinal survey (100% response rate). Participants repeated the post-test scenario in two-months (86% response rate) and completed another post-test scenario using a low-fidelity table-top simulator (80% response rate) five-months after the initial study intervention. Participants’ survey responses were collected to measure attitudes towards Digital Simulation, technology, and mindset. Knowledge was assessed at baseline (pre-test), acquisition (post-test), retention (2-month post-test), and transfer (5-month post-test). Results Fifty neonatal HCPs participated in this study (44 females and 6 males; 27 nurses, 3 nurse practitioners, 14 respiratory therapists, and 6 doctors). Most participants reported technology in medical education as useful and beneficial. Three attitudinal clusters were identified by a hierarchical clustering algorithm based on survey responses. Although participants exhibited diverse attitudinal paths, they all improved neonatal resuscitation performance after using the Digital simulator and successfully transferred their knowledge to a new medium. Conclusions Digital Simulation improved HCPs’ neonatal resuscitation performance. Medical education may benefit by incorporating technology during Simulation training.

Rick Kuffel - One of the best experts on this subject based on the ideXlab platform.

  • Key techniques in real time Digital Simulation for closed-loop testing of HVDC systems
    CSEE Journal of Power and Energy Systems, 2017
    Co-Authors: Yi Zhang, Hui Ding, Rick Kuffel
    Abstract:

    This paper introduces several key techniques in realtime Digital Simulation for closed-loop testing of high voltage direct current (HVDC) systems, including line commutated converter (LCC) HVDC valve group models, modular multilevel converter (MMC) HVDC models, phase domain frequency dependent transmission line models, and switchable filter models. Various issues such as background, algorithms, implementations, applications, and validation of these models are introduced. These techniques represent the most advanced technology in modelling HVDC systems on a real time simulator. The models have been implemented on the RTDS Simulator, a comprehensive real time power system Digital Simulation tool.

  • real time Digital Simulation for control and protection system testing
    Power Electronics Specialists Conference, 2004
    Co-Authors: P Forsyth, T Maguire, Rick Kuffel
    Abstract:

    Today's power system environment is becoming more and more complex. Electrical power networks are being pushed closer to their limits, while at the same time higher reliability and efficiency are demanded. As a result, electrical equipment manufacturers are developing advanced equipment and installations to meet these requirements. Part of the challenge in designing such apparatus is the need to accurately simulate (prove) and test these devices before they are installed in an actual power system. The real time Digital simulator (RTDS) allows developers to accurately and efficiently simulate electrical power systems and their ideas to improve them. The RTDS simulator operates in real time, therefore not only allowing the Simulation of the power system, but also making it possible to test physical protection and control equipment. This gives developers the means to prove their ideas, prototypes and final products in a realistic environment. This paper will summarize the fundamental design of the RTDS simulator, with particular emphasis on recent developments and enhancements. It will also describe practical applications of the simulator in the various stages of power system design, testing and implementation. A brief description of ongoing development for the real time Simulation of voltage source converter (VSC) converters is included.

  • rtds a fully Digital power system simulator operating in real time
    ICDS '95. First International Conference on Digital Power System Simulators, 1995
    Co-Authors: Rick Kuffel, R.p. Wierckx, Jared Giesbrecht, T Maguire, P G Mclaren
    Abstract:

    Abstruct - This paper presents details on the design, architectural features and applications of a real-time Digital simulator (RTDSm) developed at the Manitoba HVDC Research Centre (Winnipeg, Canada). Custom hardware and software have been developed and collectively applied to the Simulation and study of electromagnetic transients phenomenon in power systems in real-time. The combination of real-time operation, flexible YO, graphical user interface and an extensive library of accurate power system component models make the RTDS an ideal Simulation tool with a wide range of applications. I. INTRODUCTION Simulation has long been recognized as an important and necessary step in the development, design and testing of power generation and transmission systems. A wide variety of both analogue and Digital Simulation tools are available and typically used during various stages of system development. Recent advances in both computing hardware and sophisticated power system component modelling techniques have significantly increased the application of Digital Simulation in the power system industry. Of particular interest in the context of this paper are the advances made in the study of electromagnetic transients phenomenon.

Dieter Britz - One of the best experts on this subject based on the ideXlab platform.

  • minimum grid Digital Simulation of chronoamperometry at a disk electrode
    Electrochimica Acta, 2012
    Co-Authors: Dieter Britz, Ole Osterby, Jorg Strutwolf
    Abstract:

    Abstract We seek to find the best ways to achieve a minimum grid with a given target accuracy in the computed current in the Simulation of a diffusion limited chronoamperometric experiment at an ultramicrodisk electrode. We present some results for direct discretisation on the cylindrical geometry in ( R , Z ) space and in transformed coordinates ( θ , Γ ), comparing four commonly used transformations. In all cases, the use of multi-point spatial derivative approximations are explored to find an optimum. Orthogonal collocation is studied in the two dimensions, and found less efficient than an evenly divided grid and smaller multi-point approximations. The eigenvalue–eigenvector method is studied and found to be relatively inefficient but was useful in providing some information on error waves seen with three of the four transformations used. These error waves are not due to an error propagation, a fact that became clear from the eigenvalue–eigenvector method, which reproduced the waves.

  • Digital Simulation in electroanalytical chemistry
    Encyclopedia of Electrochemistry, 2003
    Co-Authors: Dieter Britz
    Abstract:

    The sections in this article are Introduction Historical Some Mathematics Three Model Systems Normalization Denormalization The Box Method Point Discretizations Stability Gradients at the Electrode Boundary Conditions The Explicit Method Fudging Homogeneous Chemical Reactions Advanced Methods Unequal Intervals The Rudolph Method for Coupled Systems BDF(FIRM) Extrapolation Method of Lines Commercial Packages The Future