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General Meeting of the IEEE-Power-and-Energy-Society

作者： Li, Peng Wang, Zhiying Ding, Chengdi Yu, Hao Wang, Chengshan Tianjin Univ Minist Educ Key Lab Smart Grid Tianjin 300072 Peoples R China

ISBN: (纸本)9781467380409

A photovoltaic (PV) system based on FPGA is designed in real-time in this paper. It is partial work of hardware-in-loop simulation of high penetration PV systems. The real-time simulation methods of power electronic devices and control system are introduced. The interaction method of electrical and control system under different time steps is proposed. With the highly parallelism, distributed memory and deep pipelined structure of FPGA, typical control element modules are designed, which leads to the modeling of PV array and its controller. A single-stage PV generation system is simulated in real-time under different time steps. The minimum time step for electrical and control system can reach 1 mu s and 2 mu s. The simulation results are compared with PSCAD/EMTDC and RTDS to validate the correctness and effectiveness of the design.

关键词： Photovoltaic system real-time simulation FPGA interface algorithm

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A Design of Grid-connected PV System for Real-time Transient Simulation Based on FPGA

A Design of Grid-connected PV System for Real-time Transient...

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IEEE Power and Energy Society General Meeting

作者： Peng Li Zhiying Wang Chengdi Ding Hao Yu Chengshan Wang Key Laboratory of Smart Grid of Ministry of Education Tianjin University

ISBN: (纸本)9781467380416

A photovoltaic (PV) system based on FPGA is designed in real-time in this paper. It is partial work of hardware-in-loop simulation of high penetration PV systems. The real-time simulation methods of power electronic devices and control system are introduced. The interaction method of electrical and control system under different time steps is proposed. With the highly parallelism, distributed memory and deep pipelined structure of FPGA, typical control element modules are designed, which leads to the modeling of PV array and its controller. A single-stage PV generation system is simulated in real-time under different time steps. The minimum time step for electrical and control system can reach 1μs and 2μs. The simulation results are compared with PSCAD/EMTDC and RTDS to validate the correctness and effectiveness of the design.

关键词： Photovoltaic system Real-time simulation FPGA interface algorithm Field programmable gate arrays real-time simulation Photovoltaic systems control systems Polydnaviridae power electronic devices Electricity photovoltaic array

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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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Approximate inference for dynamic Bayesian networks: sliding window approach

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APPLIED INTELLIGENCE 2014年第4期40卷 575-591页

作者： Gao, Xiao-Guang Mei, Jun-Feng Chen, Hai-Yang Chen, Da-Qing Northwestern Polytech Univ Sch Elect & Informat Xian 710072 Peoples R China Xian Polytech Univ Sch Elect Informat Xian Peoples R China London S Bank Univ Dept Informat London England

Dynamic Bayesian networks (DBNs) are probabilistic graphical models that have become a ubiquitous tool for compactly describing statistical relationships among a group of stochastic processes. A suite of elaborately designed inference algorithms makes it possible for intelligent systems to use a DBN to make inferences in uncertain conditions. Unfortunately, exact inference or even approximation in a DBN has been proved to be NP-hard and is generally computationally prohibitive. In this paper, we investigate a sliding window framework for approximate inference in DBNs to reduce the computational burden. By introducing a sliding window that moves forward as time progresses, inference at any time is restricted to a quite narrow region of the network. The main contributions to the sliding window framework include an exploration of its foundations, explication of how it operates, and the proposal of two strategies for adaptive window size selection. To make this framework available as an inference engine, the interface algorithm widely used in exact inference is then integrated with the framework for approximate inference in DBNs. After analyzing its computational complexity, further empirical work is presented to demonstrate the validity of the proposed algorithms.

关键词： Dynamic Bayesian networks Approximate inference Sliding window interface algorithm

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Utilization of Adaptive PHIL interfaces for Harmonic Load Cases

Utilization of Adaptive PHIL Interfaces for Harmonic Load Ca...

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Annual Conference of the IEEE Industrial Electronics Society

作者： S. Paran F. Fleming D. Li C. S. Edrington Center for Advanced Power System Florida State University

ISBN: (纸本)9781479940318

Power hardware-in-the-loop (PHIL) is an important tool for testing and verifying various aspects of systems level research. It provides a realistic assessment of how a device will interact under various conditions and environments, allowing the testing process to truly vet the apparatuses before full scale deployment. Crucial to the PHIL concept, is the hardware-in-the-loop interface. interfaces must be accurate, stable and able to pass through dynamics so that the hardware under test sees the most realistic view of the remainder to the system and vice versa. The damping impedance method (DIM) provides the appropriate characteristics for dynamic load applications but its philosophy requires some modification when in a system that has considerable harmonic content in either voltage and/or current. This paper will provide a modified DIM (MDIM) method for PHIL applications to meet this criteria. Specifically, it will investigate a power-electronic-based system with a load containing harmonic content and will compare the accuracy of the results against a traditional DIM interface method.

关键词： Damping impedance DIM Modified DIM (MDIM) PHIL interface algorithm Online impedance measurement

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Research status and development of interfaes for digital hybrid simulation

Research status and development of interfaes for digital hyb...

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2011 International Conference on Electric Information and Control Engineering, ICEICE 2011

作者： Yue, Liqin Jiang, Huaqin HuangHe Science and Technology College Zhengzhou China

ISBN: (纸本)9781424480395

At present, the digital hybrid simulation uses more widely, and the corresponding interface technology has achieved great development. The paper firstly pointed out the necessity of the development of hybrid simulation technology, and then reviewed and discussed the research status and development of interfaces for hybrid simulation from interface timing sequence, interface algorithm, interface error, etc. Finally, the paper pointed out the insufficient and aspects to be developed about interfaces for hybrid simulation. © 2011 IEEE.

关键词： Hybrid power systems PSCAD Power system dynamics Static VAr compensators Transient analysis digital simulation hybrid simulation interface interface algorithm

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Real-time Simulation-based Design of a Power-Hardware-In-The-Loop Setup to Support Studies of Shipboard MVDC Issues

Real-time Simulation-based Design of a Power-Hardware-In-The...

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IEEE Electric Ship Technologies Symposium (ESTS 2009)

作者： Andrus, M. Steurer, M. Edrington, C. Bogdan, F. Ginn, H. Dougal, R. Santi, E. Monti, A. Florida State Univ Ctr Adv Power Syst Tallahassee FL 32310 USA Mississippi State Univ Mississippi State MS USA Univ South Carolina Columbia SC USA Univ Aachen Rhein Westfal TH Aachen EON ERC Inst Automat Complex Power Syst Aachen Germany

ISBN: (纸本)9781424434381

Power-hardware-in-the-loop (PHIL) experiments provide Navy ship designers with a flexible and cost effective tool for studying the technical challenges associated with the use of medium voltage DC (MVDC) for shipboard electric power generation and distribution. In support of this effort, the Electric Ship Research and Development Consortium is planning to conduct MVDC PHIL experiments in the test bed facility at Florida State University's Center for Advanced Power Systems (CAPS). Low-voltage Power Electronic Building Block (PEBB) modules will be configured to function like MVDC AC/DC, DC/DC and DC/AC power converters. They will operate within a simulated, shipboard, MVDC power system environment that will be running on CAPS's real-time digital simulator (RTDS). This paper describes the planned PHIL test configuration and the simulation models to be employed. It also provides results from an initial "software only" PHIL demonstration in which the entire PHIL test bed is modeled and simulated on the RTDS. The results illustrate the usefulness of conducting simulations of planned HIL experiments in order to "de-risk" the testing program.

关键词： IPS NCIPS interface algorithm HIL PHIL shipboard power systems modeling and simulation RTDS VTB MVDC

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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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Dynamic possibilistic networks: Representation and exact inference

Dynamic possibilistic networks: Representation and exact inf...

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IEEE International Conference on Computational Intelligence for Measurement Systems and Applications

作者： Heni, Abdelkader Ben Amor, Nahla Benferhat, Salem Alimi, Adel Univ Sfax ENIS REGIM Route Soukra Km 3 Sfax 3000 Tunisia Univ Tunis ISG LARODEC Tunis 2000 Tunisia Univ Artois CRIL F-62307 Arras France

ISBN: (纸本)9781424408238

In this paper, we present dynamic possibilistic networks (DPNs);a new framework for modeling uncertain sequential data with possibilistic graphical models. Depending on the kind of conditioning, two types of networks are studied here: the product-based and the min-based networks. Hence two versions of an exact algorithm for inference in such networks are described here. The main contribution of this paper is the use of possibility theory as a framework for representation of temporal networks which gives an alternative framework for dynamic probabilistic networks. We especially, present how junction trees can be used to make online inference namely filtering problem in product-based DPNs and min-based DPNs and we will discuss how this technique can be extended to make prediction.

关键词： dynamic possibilistic networks possibility theory interface algorithm possibilistic conditioning

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