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interface algorithm Design for Power Hardware-in-the-loop Emulation of Modular Multilevel Converter Within High-Voltage Direct Current Systems

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IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 2021年第12期68卷 12206-12217页

作者： Li, Binbin Xu, Zigao Wang, Shengbo Han, Linjie Xu, Dianguo Harbin Inst Technol Sch Elect Engn & Automat Harbin 150001 Peoples R China

Power hardware-in-the-loop (PHIL) simulation combines the advantages of digital simulation and physical experiment, which provides great convenience for research and verification of a complex electric system, such as the high-voltage direct current (HVdc) system. The digital interface algorithm realizes interconnection of the digital and physical system, but it is also the main factor to affect stability and accuracy of the PHIL results. In this article, the damping impedance interface algorithm is adopted to test the performance of a modular multilevel converter (MMC) connected into an HVdc system. Instead of online acquiring the exact MMC dc impedance, a simple RLC damping impedance is proposed to ensure stability and particularly, low-frequency accuracy for the PHIL system. Moreover, as testing in the laboratory does not allow hundreds of MVA-rated physical MMC, suitable scaling factors are proposed to design a scaled-down MMC prototype which presents identical dynamic characteristic with a full-scale MMC. A PHIL setup including RT-LAB real-time simulator, power amplifier, and a scaled-down MMC prototype is built and the experiments confirm the effectiveness of the proposed interface algorithm.

关键词： Impedance HVDC transmission Damping Prototypes Circuit stability Power system stability Hardware Damping impedance method (DIM) high-voltage direct current (HVdc) interface algorithm modular multilevel converter (MMC) power hardware-in-the-loop (PHIL) stability

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Design and Analysis on an Optimized interface algorithm for Real-Time Integrated Simulation System of Renewable Energy and the Power Grid

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ENERGIES 2020年第17期13卷 4380-4380页

作者： Meng, Yanfeng Ji, Li Hu, Shuju Xu, Honghua Chinese Acad Sci Inst Elect Engn Beijing 100190 Peoples R China China Univ Petr Coll Informat Sci & Engn Beijing 102249 Peoples R China

The interface algorithm is critical for accuracy of the real-time integration simulation system of renewable energy and the power grid. To improve the overall performance of the existing interface algorithms, this paper proposes an optimized interface algorithm based on the auxiliary damping impedance method interface current feedback. We explain in detail the implementation principle of the new interface algorithm and the calculation method of impedance matching and also provide a parallel timing control logic. Using the new interface algorithm, we derive equations for voltage and current of the digital simulation system side and the device under test side and also compare it with the naturally coupled system without interface delay. Finally, we verify the accuracy of the new interface algorithm via establishing a complete model of the real-time integration simulation system with a wind turbine and the power grid. The results show that the accuracy can be improved 95% in the digital simulation system side and 17% in the device under test side by using the proposed interface algorithm in this paper.

关键词： high-power renewable energy power hardware-in-the-loop real-time integrated simulation system interface algorithm impedance matching

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Selection of an appropriate interface algorithm for coupling two real-time simulators

ELEKTROTEHNISKI VESTNIK

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ELEKTROTEHNISKI VESTNIK 2020年第1-2期87卷 23-30页

作者： Dolenc, Janja Bozicek, Ambroz Herman, Leopold Blazic, Bostjan Univ Ljubljani Fak Elektrotehniko Trzaska 25 Ljubljana 1000 Slovenia

Connection of two digital real-time simulators introduces some delay that is not present in a real network. This delay has to be accounted for by using an interface algorithm. The paper presents two interface algorithms for real-time digital simulations and proposes a method for the selection of the most appropriate one for a specific case. The first algorithm is the Ideal Transformer Model (ITM) algorithm which is a straightforward method that does not affect the system impedance characteristic. However, using certain ratio of the network and load impedance may to some extent result in an unstable operation of the coupled simulators system. In order to cope with this deficiency, the Transmission Line Model (TLM) algorithm is used as the second algorithm. In this way, the system stability is achieved. Compared to the ITM algorithm, the TLM algorithm accuracy is lower meaning that the interface algorithm should be selected depending on the system configuration. A method for choosing the most viable algorithm is proposed and cases of using the two algorithms are presented.

关键词： real-time simulation interface algorithm HIL simulations stability accuracy

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Research on the interface algorithm of power system electromechanical-electromagnetic hybrid simulation 5

Research on the interface algorithm of power system electrom...

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5th International Conference on Electric Utility Deregulation and Restructuring and Power Technologies (DRPT)

作者： Zhang, Hui Li, Ran Song, Yunting Liu, Wenzhuo North China Elect Power Univ Baoding 071003 Hebei Province Peoples R China China Elect Power Res Inst Beijing 100192 Peoples R China

ISBN: (纸本)9781467371063

With the increase of the number and capacity of HVDC, the influence of HVDC system on AC power network is more and more complex. Electromechanical transient simulation and electromagnetic transient simulation cannot meet the requirements of HVDC system study in large power grid. Therefore, research on power system electromechanical-electromagnetic hybrid simulation has very important significance. In this paper, we improve the algorithm of the interface based on the PSD-PSModel hybrid simulation. The optimization curve fitting algorithm based on FFT is proposed to improve the accuracy of the algorithm. The test method of interface algorithm is proposed, and the practical conclusion of PSD-PSModel interface is obtained.

关键词： Hybrid simulation interface algorithm FFT transform Electromechanical simulation Electromagnetic simulation

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Improve the stability and the accuracy of power hardware-in-the-loop simulation by selecting appropriate interface algorithms

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IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS 2008年第4期44卷 1286-1294页

作者： Ren, Wei Steurer, Michael Baldwin, Thomas L. Florida State Univ Ctr Adv Power Syst Tallahassee FL 32310 USA Florida State Univ Florida A&M Univ Coll Engn Tallahassee FL 32306 USA

The closed-loop stability and the simulation accuracy are two paramount issues in power hardware-in-the-loop (HIL) simulation in regard to the operational safety and the experiment reliability. In this paper, the stability issue of the power HIL simulation is first introduced, with a simple example. A stability analysis and accuracy estimation method based on the system's loop transfer function is later given. Five different interface algorithms are described, and their respective characteristics with respect to the system stability are compared. Through Matlab simulations and field experiments of two representative power HIL examples, it is revealed, that certain interface algorithms exhibit higher stability and accuracy than the others under the given conditions. A recommendation for selecting appropriate interface algorithms is finally proposed at the end of this paper.

关键词： interface algorithm power hardware-in-the-loop (HIL) simulation simulation stability

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Improve the stability and the accuracy of power hardware-in-the-loop simulation by selecting appropriate interface algorithms

Improve the stability and the accuracy of power hardware-in-...

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IEEE/IAS Industrial and Commercial Power Systems Technical Conference

作者： Ren, Wei Steurer, Michael Baldwin, Thomas L. Florida State Univ Ctr Adv Power Syst Tallahassee FL 32310 USA Florida State Univ Florida A&M Univ Coll Engn Tallahassee FL 32306 USA

ISBN: (纸本)1424412919

关键词： interface algorithm power hardware-in-the-loop (HIL) simulation simulation stability

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Stability and Accuracy Analysis of Power Hardware in the Loop System with Different interface algorithms 17

Stability and Accuracy Analysis of Power Hardware in the Loo...

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17th IEEE Workshop on Control and Modeling for Power Electronics (COMPEL)

作者： Hatakeyama, Tomoyuki Riccobono, Antonino Monti, Antonello Hitachi Europe GmbH European R&D Ctr Aachen Germany Rhein Westfal TH Aachen EON Energy Res Ctr Inst Automat Complex Power Syst Aachen Germany

ISBN: (纸本)9781509018154

The power hardware in the loop (PHIL) technology allows for testing a physical device under test (DUT) connected to the real time simulated rest of system (ROS) through a power electronic interface and interface algorithm (IA). Stability and accuracy questions remain open due to the non-ideal interface converter. This paper presents a frequency-domain stability analysis and a time-domain accuracy analysis of the PHIL system with different IAs, taking into account of the delay factors in the PHIL system. Results show that the damping impedance method (DIM) IA can realize a perfectly stable PHIL system, while the ideal transformer model (ITM) IA needs be modified to stabilize the PHIL system. The voltage and current expressions at both ROS side and DUT side are derived to make considerations about the accuracy of the PHIL system. Results show that matching of the waveforms at ROS and DUT sides can be achieved for passive DUTs with the DIM IA;however, for active DUTs, the matching suffers from the delay factors.

关键词： Power hardware in the loop real-time simulator interface algorithm power electronics device power system

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Evaluation of the interface Accuracy for Power Hardware-in-the-Loop Experiments

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ELECTRIC POWER COMPONENTS AND SYSTEMS 2017年第7期45卷 763-773页

作者： Paran, Sanaz Vu, Tuyen V. Franco, Fernand Diaz Edrington, Chris S. Florida A&M Univ Dept Elect & Comp Engn Tallahassee FL 32307 USA Florida State Univ Dept Elect & Comp Engn Ctr Adv Power Syst Tallahassee FL 32306 USA

Selecting an accurate interface algorithm is a primary goal in order to have a successful operation of power hardware-in-the-loop. The purpose of this paper is to utilize the modified damping impedance method for testing the accuracy of the interface algorithm in power hardware-in-the-loop applications in comparison to the traditional damping impedance method and ideal transformer model interfaces. The hardware-in-the-loop test-bed (a power-electronic-based system) is utilized to experimentally analyze and validate the expected advantages of the modified damping impedance method. In addition, to evaluate the power hardware-in-the-loop accuracy, a transfer function perturbation-based approach is considered to validate the results of experimentation analytically and quantitatively.

关键词： converters power hardware-in-the-loop power conversion power systems interface algorithm inverters reactive power control real-time digital signal processing voltage control

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A Multi-Time-Step Transmission Line interface for Power Hardware-in-the-Loop Simulators

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IEEE TRANSACTIONS ON ENERGY CONVERSION 2020年第1期35卷 539-548页

作者： Tremblay, Olivier Rimorov, Dmitry Gagnon, Richard Fortin-Blanchette, Handy Hydro Quebecs Res Inst IREQ Power Syst Simulat & Evolut Div Varennes PQ J3X 1S1 Canada Univ Quebec Dept Elect Engn Ecole Technol Super Montreal PQ J3X 1S1 Canada

Developing a general and stable numerical interface for power hardware-in-the-loop (PHIL) applications is a major challenge. This paper proposes a stable, robust and precise implementation of a multi-time-step interface for a PHIL simulator based on the Bergeron transmission line model (BTLM). Two limitations of the transmission-line-based interface were identified, and remedial strategies were formulated in order to ensure that the interface was compatible with the PHIL application. Stability and passivity analyses were then conducted on the resulting interface to verify its performance. The proposed interface was implemented in an experimental 3-kVA PHIL setup, using a custom-made switching power amplifier (PA). Multiple tests were performed in order to demonstrate the stability and accuracy of the closed-loop system under a wide range of operating conditions and with various devices under test (DUTs). Experimental results were obtained from islanding tests involving different simulated load configurations and solar inverter responses to network disturbance while operating in a closed-loop configuration.

关键词： Impedance Power system stability Power transmission lines Stability analysis Resistors Testing Mathematical model Bergeron transmission line model digital simulation discrete-time systems energy conversion FPGA interface algorithm modeling power hardware-in-the-loop simulation real-time systems stability analysis

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A New Control Method for the Power interface in Power Hardware-in-the-Loop Simulation to Compensate for the Time Delay 49

A New Control Method for the Power Interface in Power Hardwa...

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49th International Universities Power Engineering Conference (UPEC)

作者： Guillo-Sansano, E. Roscoe, A. J. Jones, C. E. Burt, G. M. Univ Strathclyde Glasgow G1 1XQ Lanark Scotland

ISBN: (纸本)9781479965571

In an attempt to create a new control method for the power interface in PHIL simulations, a simulated PHIL simulation is carried out where the simulation and hardware part are modelled in MATLAB/Simulink along with the new control method. This power interface control is proposed to achieve high accuracy in PHIL simulation with closed-loop control for aerospace, marine or micro grid applications. Rather than analyzing the Real Time Simulator (RTS) data and controlling the interface using time-domain resonant controllers, the RTS data will be analyzed and controlled at the interface in the frequency domain, on a harmonic-by-harmonic and phase-by-phase basis. This should allow the RTS time delay to be compensated accurately, and removes the requirement to include additional components to compensate for the simulation delay into the simulated power system as it is not appropriate for power systems which have short transmission lines. This is extremely relevant for marine and micro grid scenarios where such inductive components may not be present.

关键词： interface algorithm power hardware-in-the-loop (PHIL) simulation real-time systems simulation accuracy simulation stability simulation time delay

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