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A harmonic compensation Approach for Interlinking Voltage Source Converters in Hybrid AC-DC Microgrids with Low Switching Frequency

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CSEE Journal of Power and Energy Systems 2018年第1期4卷 39-48页

作者： Hao Tian Xiaohan Wen Yun Wei Li Department of Electrical and Computer Engineering University of AlbertaEdmontonABT6G 2V4Canada China Mobile Group Liaoning Co. Ltd.ShenyangChina

In recent years,the hybrid AC-DC microgrid has been well accepted as it combines the advantages of both AC and DC systems.As the microgrid contains both DC sub-grids and AC sub-grids,interlinking DC-AC converters are essential.Meanwhile,considering the nonlinear AC loads may deteriorate the voltage quality of the AC bus,embedding an ancillary harmonic compensation function to the interlinking converters is promising.However,the conventional harmonic control methods used for active power filters(APFs)may not be suitable for the interlinking converters due to the main purpose of it is to exchange real and reactive power between the DC and AC sub-grids.The switching frequency is preferred to be lower than the APFs when the capacity of the microgrid is large.At low switching frequency,harmonic compensation performance or even the system stability may be affected.In this paper,a harmonic compensation approach suitable for hybrid AC-DC interlinking converters at low switching frequency is proposed.Through feeding the PWM reference signal with the harmonic compensation component directly to avoid the multi-loop control path of the fundamental component,the proposed method can achieve the effective harmonics compensation without being limited by the closed-loop control bandwidth.The proposed method,modeling approaches,stability analysis,as well as detailed virtual impedance design are presented.Experimental verification is also provided.

关键词： harmonic compensation hybrid AC-DC microgrid virtual impedance

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Research on Deadbeat Control Strategy Based on Recursive LSM for harmonic compensation

Research on Deadbeat Control Strategy Based on Recursive LSM...

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2007 8th International Conference on Electronic Measurement & Instruments（ICEMI’2007）

作者： Zhou Shan Yu Youling Xu Weisheng (College of Electronics and Information Engineering Tongji University Shanghai 201804 China)

The traditional deadbeat control strategy is based on an accurate mathematical modeling, the property of which is subjected to be affected by the parameters of power system. In this paper, a systemic research is carried out on a deadbeat current control （DBCC） strategy based on recursive Least Squares Method （LSM） for harmonic compensation of shunt single-phase voltage-source APF.

关键词： Deadbeat control harmonic compensation Recursive Least Squares Method APF

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Overview of control,integration and energy management of microgrids

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Journal of Modern Power Systems and Clean Energy 2014年第3期2卷 212-222页

作者： Yunwei LI Farzam NEJABATKHAH Department of Electrical and Computer Engineering University of AlbertaEdmontonABCanada

Microgrids are being developed as a building block for future smart grid system.Key issues for the control and operation of microgrid include integration technologies and energy management schemes.This paper presents an overview of grid integration and energy management strategies of microgrids.It covers a review of power electronics interface topologies for different types of distributed generation(DG)units in a microgrid,a discussion of energy management strategies,as well as the DG interfacing converter control schemes.Considering the intermittent nature of many renewable energy based DG units,the ancillary services of DGs using the available interfacing converter rating are also discussed in the paper.

关键词： Distributed generation Energy management schemes harmonic compensation Interfacing converters Microgrid Power quality Unbalance voltage compensation

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Improved nonlinear optimization in the storage ring of the modern synchrotron radiation light source

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Chinese Physics C 2009年第1期33卷 65-73页

作者：田顺强刘桂民后接陈光玲陈森玉 Shanghai Institute of Applied Physics Chinese Academy of Sciences Graduate University of Chinese Academy of Sciences Institute of High Energy Physics Chinese Academy of Sciences

In the storage ring of the third generation light sources, nonlinear optimization is an indispensable course in order to obtain ample dynamic acceptances and to reach high injection efficiency and long beam lifetime, especially in a low emittance lattice. An improved optimization algorithm based on the single resonance approach, which takes relative weight and initial harmonic Sextupole Integral Strength （HSIS） as search variables, is discussed in this paper. Applications of the improved method in several test lattices are presented. Detailed analysis of the storage ring of the Shanghai Synchrotron Radiation Facility （SSRF） is particularly emphasized. Furthermore, cancellation of the driving terms is investigated to reveal the physical mechanism of the harmonic sextupole compensation. Sensitivity to the weight and the initial HSIS as well as dependence of the optimum solution on the convergent factor is analyzed.

关键词： storage ring nonlinear optimization harmonic compensation single resonance approach

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RTDS hardware implementation and simulation of SHAF for mitigation of harmonics using p-q control strategy with PI and fuzzy logic controllers

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Frontiers of Electrical and Electronic Engineering in China 2012年第4期7卷 427-437页

作者： Suresh MIKKILI A. K. PANDA Department of Electrical Engineering National Institute of TechnologyRourkela Orissa 769008 India

The main objective of this paper is to develop PI and fuzzy controllers to analyze the performance of instantaneous real active and reactive power （p-q） control strategy for extracting reference currents of shunt active filters （SHAFs） under balanced, unbalanced, and balanced non-sinusoidal conditions. When the supply voltages are balanced and sinusoidal, both controllers converge to the same compensation characteristics. However, if the supply voltages are distorted and/or unbalanced sinusoidal, these controllers result in different degrees of compensation in harmonics. The p-q control strategy with PI controller is unable to yield an adequate solution when source voltages are not ideal. Extensive simulations were carried out with balance, unbalanced, and non-sinusoidal conditions. Simulation results validate the superiority of fuzzy logic controller over PI controller. The three-phase four-wire SHAF system is also implemented on a real-time digital simulator （RTDS hardware） to further verify its effective-ness. The detailed simulation and RTDS hardware results are included.

关键词： harmonic compensation shunt active filter（SHAF） p-q control strategy PI controller fuzzy logiccontroller real-time digital simulator （RTDS hardware）

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Design of Shunt Active Power Filter Based on DSP

Design of Shunt Active Power Filter Based on DSP

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第一届国际测量仪器与测试自动化学术会议

作者： Xu Xiangzheng Chen Baichao (School of Electrical Engineering Wuhan University Wuhan 430072 Hubei China) (School of Electrical Engineering East China Jiaotong University Nanchang 330013 Jiangxi China)

＜正＞Diversiform controlled regulators for compensation have emerged in large numbers as power quality is deteriorated by nonlinear load of power system. Among them, a new dynamic and real time compensation equipment, namely, shunt active power filter （SAPF）. has predominant compensation capability. The operation principle and configurations of a SAPF is analyzed, and then a digital control system based on DSP is set up. The control strategies and hardware and software of the proposed system are presenied The experiments indicate that the THD of the current wave is reduced from 24% to 3.8%. Experimental results verify the feasibility and validity of the proposed control system.

关键词： APF harmonic compensation DSP.

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