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An Impedance-based Parameter Design Method for Active Damping of Load Converter Station in MTDC Distribution System

Journal of Modern Power Systems and Clean Energy 2022年第5期10卷 1423-1436页

作者： Pengwei Chen Wenmeng Zhao Xin Chen Wenwei Jiang IEEE Jiangsu Key Laboratory of New Energy Generation and Power Conversion College of Automation EngineeringNanjing University of Aeronautics and AstronauticsNanjingChina

To achieve the efficient application of impedance analysis in the stability assessment and enhancement of multiterminal DC distribution systems, this paper proposes the DCside reduced-order impedance models with power control and AC voltage control, respectively, by taking the load converter station as the object. By using the DC-side current as the feedforward state, the active compensator applied to the load converter station with two control modes is also derived as well as the corresponding reduced-order impedance models. Combined with the reduced-order impedance models, a method based on damping factor sensitivity is further proposed to design the parameters of the derived active compensators. The verification results in the frequency domain and time domain demonstrate the accuracy of the reduced-order impedance and the effectiveness of the proposed compensator parameter design method.

关键词： Impedance modeling order reduction active compensator damping factor sensitivity

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Composite Control of Nonlinear Singularly Perturbed Systems via Approximate Feedback Linearization

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International Journal of Automation and computing 2020年第4期17卷 610-620页

作者： Aleksey Kabanov Vasiliy Alchakov Sevastopol State University Sevastopol 299053Russian Federation

This article is devoted to the problem of composite control design for continuous nonlinear singularly perturbed(SP)system using approximate feedback linearization(AFL)*** essence of AFL method lies in the feedback linearization only of a certain part of the original nonlinear *** to AFL approach,we suggest to solve feedback linearization problems for continuous nonlinear SP system by reducing it to two feedback linearization problems for slow and fast subsystems *** resulting AFL control is constructed in the form of asymptotic composition(composite control).Standard procedure for the composite control design consists of the following steps:1)system decomposition,2)solution of control problem for fast subsystem,3)solution of control problem for slow subsystem,4)construction of the resulting control in the form of the composition of slow and fast *** main difficulty during system decomposition is associated with dynamics separation condition for nonlinear SP *** overcome this,we propose to change the sequence of the design procedure:1)solving the control problem for fast state variables part,2)system decomposition,3)solving the control problem for slow state variables part,4)construction of the resulting composite *** this way,fast feedback linearizing control is chosen so that the dynamics separation condition would be met and the fast subsystem would be *** application of the proposed approach is illustrated through several examples.

关键词： Approximate feedback linearization(AFL) composite control nonlinear singularly perturbed system order reduction decomposition

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Design and Verification of High-Speed VLSI Physical Design

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Journal of Computer Science & Technology 2005年第2期20卷 147-165页

作者： DianZhou Rui-MingLi DepartmentofElectricalEngineering TheUniversityofTexasatDallasRichardsonTX75083-0688U.S.A.／／SchoolofMicroelectronicsFudanUniversityShanghai200433P.R.China DepartmentofElectricalEngineering TheUniversityofTexasatDallasRichardsonTX75083-0688U.S.A.

With the rapid development of deep submicron (DSM) VLSI circuit designs, many issues such as time closure and power consumption are making the physical designs more and more challenging. In this review paper we provide readers with some recent progress of the VLSI physical designs. The recent developments of floorplanning and placement, interconnect effects, modeling and delay, buffer insertion and wire sizing, circuit order reduction, power grid analysis, parasitic extraction, and clock signal distribution are briefly reviewed.

关键词： VLSI physical design floorplanning and placement interconnect delay wire sizing buffer insertion power order reduction power grid parameter extraction clock distribution

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Sliding Mode Control Design via Reduced order Model Approach

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International Journal of Automation and computing 2007年第4期4卷 329-334页

作者： B.Bandyopadhyay Alemayehu G/Egziabher Abera S.Janardhanan Victor Sreeram Interdisciplinary Programme in Systems and Control Engineering Indian Institute of Technology BombayMumbai 400076India Department of Electrical Engineering Indian Institute of Technology DelhiNew Delhi 110016India School of Electrical Electronicand Computer EngineeringThe University of Western AustraliaWestern Australia 6009Australia

This paper presents a design of continuous-time sliding mode control for the higher order systems via reduced order model. It is shown that a continuous-time sliding mode control designed for the reduced order model gives similar performance for thc higher order system. The method is illustrated by numerical examples. The paper also introduces a technique for design of a sliding surface such that the system satisfies a cost-optimality condition when on the sliding surface.

关键词： Sliding mode control order reduction reduced order model higher order system optimal control.

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