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2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)最新文献

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A low-profile, high power density Inverter with minimal energy storage requirement for ripple cancellation 低轮廓，高功率密度逆变器与最小的能量存储需求纹波消除
2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) Pub Date : 2016-06-27 DOI: 10.1109/PEDG.2016.7527059
Edgaras Mickus, T. T. Vu, T. O’Donnell
{"title":"A low-profile, high power density Inverter with minimal energy storage requirement for ripple cancellation","authors":"Edgaras Mickus, T. T. Vu, T. O’Donnell","doi":"10.1109/PEDG.2016.7527059","DOIUrl":"https://doi.org/10.1109/PEDG.2016.7527059","url":null,"abstract":"An inherent characteristic of a Single-Phase Inverter is the DC-link voltage ripple. In order to ensure Maximum Power Point Tracking (MPPT) in Photovoltaic (PV) systems, the voltage ripple needs to be suppressed through use of an energy buffering device which can be a passive, i.e. typically a capacitor or active in the form of an Active Power Filter (APF). This paper describes a novel approach to an APF through a combination of hardware and software advances, with an emphasis on: a) further efficiency improvements through enhanced control; b) maximized deployment capabilities - the proposed APF is independent of the Inverter and can directly replace the DC-link ripple capacitor; c) high quality ripple cancellation; d) minimum storage capacitance.","PeriodicalId":156411,"journal":{"name":"2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122003636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Control of a grid connected converter during weak grid conditions 弱电网条件下并网变流器的控制
2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) Pub Date : 2016-06-27 DOI: 10.1109/PEDG.2016.7527019
S. Lorenzen, A. Nielsen, L. Bede
{"title":"Control of a grid connected converter during weak grid conditions","authors":"S. Lorenzen, A. Nielsen, L. Bede","doi":"10.1109/PEDG.2016.7527019","DOIUrl":"https://doi.org/10.1109/PEDG.2016.7527019","url":null,"abstract":"The focus on renewable energy sources have been increasing since the late 80s in Denmark. Especially focus on wind power has been increasing, with implementation of big on- and offshore wind farms. However, when installing the wind farms, these are often placed distant from the utility grid, like the case for offshore wind turbines. This can cause the wind farm grid networks to be weak. A weak network is an extra challenge to inject energy into, since it might exceed grid codes and grid standard values, if not compensated for. To ensure quality of the energy injected to the network, a Voltage Source Converter (VSC) is used. Using these VSCs the quality of the injected energy can be according to the standards requirements. This paper shows the effects of different weak grid conditions on the control system of the inverter, which includes lowered bandwidth and higher response time. Furthermore the controller has been designed to be stable for different Short Circuit Ratio (SCR) values. The designed controller and filter has shown to be operating under various weak grid conditions by simulations and for a 5kW laboratory setup.","PeriodicalId":156411,"journal":{"name":"2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"31 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129318736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 28
Comprehensive power MOSFET model for LLC resonant converter in renewable energy applications 可再生能源LLC谐振变换器的综合功率MOSFET模型
2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) Pub Date : 2016-06-27 DOI: 10.1109/PEDG.2016.7527095
Z. Qu, V. Dayal, Jiawei Dong, R. Sangha, N. Shafiei, S. A. Arefifar, M. Ordonez, M. Craciun, Chris Botting
{"title":"Comprehensive power MOSFET model for LLC resonant converter in renewable energy applications","authors":"Z. Qu, V. Dayal, Jiawei Dong, R. Sangha, N. Shafiei, S. A. Arefifar, M. Ordonez, M. Craciun, Chris Botting","doi":"10.1109/PEDG.2016.7527095","DOIUrl":"https://doi.org/10.1109/PEDG.2016.7527095","url":null,"abstract":"LLC resonant converters are widely used in distribution systems for energy conversion. Having a detailed simulation model of the power MOSFETs in an LLC resonant converter can significantly improve the dead time calculation and subsequently improve the DC-DC converter's efficiency. In this paper, a new model for power MOSFET employed in an LLC resonant converter will be presented to predict the transient time for the MOSFET drain-to-source voltage. This non-ideal model of power MOSFETs in an LLC converter can be very useful for applications requiring fast and efficient energy transfer such as charging batteries from PV cells or wind farms. Renewable sources of energy have variable input depending on natural conditions and variable output to a battery, and a model is required to provide adaptive dead time. The aim of developing this model is to provide the ability to better approximate dead time to maximize efficiency at different operating points. The simulation model includes the MOSFET on-state resistance, the variable output capacitance, and the diode forward voltage. The approach used in this paper is to model the variable output capacitance and to simulate the effects of this parasitic element on the behavior of the drain-to-source voltage during the transient. A new set of equations will be proposed for the output capacitance based on the data sheet of a power MOSFET. The experimental results obtained from a 1.2 kW LLC resonant converter at different operating points, prove the accuracy of this simulation model.","PeriodicalId":156411,"journal":{"name":"2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127076099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Cascaded control to shape output virtual impedance and improve output voltage quality for power inverter 通过级联控制来塑造输出虚阻抗，提高逆变器输出电压质量
2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) Pub Date : 2016-06-27 DOI: 10.1109/PEDG.2016.7527056
S. Gadelovits, Qing-Chang Zhong, V. Kadirkamanathan
{"title":"Cascaded control to shape output virtual impedance and improve output voltage quality for power inverter","authors":"S. Gadelovits, Qing-Chang Zhong, V. Kadirkamanathan","doi":"10.1109/PEDG.2016.7527056","DOIUrl":"https://doi.org/10.1109/PEDG.2016.7527056","url":null,"abstract":"In this paper, a cascaded control scheme for single-phase inverters connected to a load is proposed to improve the power quality and shape the output impedance. The proposed strategy consists of a proportional controller in the inner loop and the Uncertainty and Disturbance Estimator (UDE) in the outer loop. An advanced modulation method is adopted to minimize the control implementation delay and both the current and the voltage control loops are analytically investigated. Simulation and experimental results are presented to validate the theory.","PeriodicalId":156411,"journal":{"name":"2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127498739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dynamic droop scheme considering effect of intermittent renewable energy source 考虑间歇性可再生能源影响的动态下垂方案
2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) Pub Date : 2016-06-27 DOI: 10.1109/PEDG.2016.7527090
Yanbo Wang, Zhe Chen, F. Deng
{"title":"Dynamic droop scheme considering effect of intermittent renewable energy source","authors":"Yanbo Wang, Zhe Chen, F. Deng","doi":"10.1109/PEDG.2016.7527090","DOIUrl":"https://doi.org/10.1109/PEDG.2016.7527090","url":null,"abstract":"This paper presents a dynamic droop control scheme for islanded microgrids dominated by intermittent renewable energy sources, which is able to perform desirable power sharing in the presence of renewable energy source fluctuation. First, allowable maximum power points of wind generator and PV generator are calculated in different wind speed and insolation ranges. Then, piecewise droop relationships between distributed generators are built. Finally, the dynamic droop control is proposed to perform power sharing according to wind speed and sunlight information from local sensors. The dynamic droop controller of each DG unit is activated through local logic variable inferred by wind speed and solar insolation information. Simulation results are given for validating the droop control scheme. The proposed dynamic droop scheme preserves the advantage of conventional droop control method, and provides flexibility and effectiveness in the presence of the renewable energy sources fluctuation.","PeriodicalId":156411,"journal":{"name":"2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130142892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Circulating current control for parallel interleaved VSCs connected in whiffletree configuration 以whiffletree结构连接的并联交错vsc的循环电流控制
2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) Pub Date : 2016-06-27 DOI: 10.1109/PEDG.2016.7527091
L. Bede, Ghanshyamsihn Gohil, M. Ciobotaru, T. Kerekes, R. Teodorescu, V. Agelidis
{"title":"Circulating current control for parallel interleaved VSCs connected in whiffletree configuration","authors":"L. Bede, Ghanshyamsihn Gohil, M. Ciobotaru, T. Kerekes, R. Teodorescu, V. Agelidis","doi":"10.1109/PEDG.2016.7527091","DOIUrl":"https://doi.org/10.1109/PEDG.2016.7527091","url":null,"abstract":"This paper presents a Proportional Resonant (PR) based circulating current controller for four parallel interleaved Voltage Source Converters (VSCs). Interleaving the carrier signals will cause a switching frequency circulating current to flow between the VSCs. Therefore, to suppress these circulating currents the VSCs are interconnected through Coupled Inductors (CIs), which form a whiffletree configuration, and they are used to suppress the switching frequency circulating current. On the other hand, the CIs are highly sensitive to fundamental frequency circulating currents, which may saturate them. Hence, a circulating current controller is required, which effectively controls the fundamental component of the circulating current. Furthermore, the circulating current is sampled using a special technique, which does not require any additional. The effectiveness of the design methodology and the performance of the circulating current controller are verified by simulation and experimental results as well.","PeriodicalId":156411,"journal":{"name":"2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131350887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Sensorless reserved power control strategy for two-stage grid-connected Photovoltaic systems 两级并网光伏系统无传感器预留功率控制策略
2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) Pub Date : 2016-06-27 DOI: 10.1109/PEDG.2016.7527032
A. Sangwongwanich, Yongheng Yang, F. Blaabjerg
{"title":"Sensorless reserved power control strategy for two-stage grid-connected Photovoltaic systems","authors":"A. Sangwongwanich, Yongheng Yang, F. Blaabjerg","doi":"10.1109/PEDG.2016.7527032","DOIUrl":"https://doi.org/10.1109/PEDG.2016.7527032","url":null,"abstract":"Due to still increasing penetration level of grid-connected Photovoltaic (PV) systems, advanced active power control functionalities have been introduced in grid regulations. A reserved power control, where the active power from the PV panels is reserved during operation, is required for grid support. In this paper, a cost-effective solution to realize the reserved power control for grid-connected PV systems is proposed. The proposed solution routinely employs a Maximum Power Point Tracking (MPPT) control to estimate the available PV power and a Constant Power Generation (CPG) control to achieve the power reserve. In this method, the irradiance measurements that have been used in conventional control schemes to estimate the available PV power are not required, and thereby being a sensorless solution. Simulations and experimental tests have been performed on a 3-kW two-stage single-phase grid-connected PV system, where the reserved power control is achieved.","PeriodicalId":156411,"journal":{"name":"2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"149 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115321072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 18
Improved maximum power point tracking algorithm using a Fuzzy Logic Controller for a Photovoltaic System 基于模糊控制器的光伏系统最大功率点跟踪改进算法
2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) Pub Date : 2016-06-27 DOI: 10.1109/PEDG.2016.7527033
W. Na, Pengyuan Chen, Jonghoon Kim, Hong-Ju Jung
{"title":"Improved maximum power point tracking algorithm using a Fuzzy Logic Controller for a Photovoltaic System","authors":"W. Na, Pengyuan Chen, Jonghoon Kim, Hong-Ju Jung","doi":"10.1109/PEDG.2016.7527033","DOIUrl":"https://doi.org/10.1109/PEDG.2016.7527033","url":null,"abstract":"In this paper, an improved the maximum power point tracking (MPPT) in a Photovoltaic (PV) System is designed by using a Fuzzy Logic Controller (FLC). The objectives of designing the FLC for MPPT in the PV systems are to accelerate the MPPT rate, and to set a smaller oscillating zone around the maximum power point (MPP). The proposed FLC based MPPT adopts a set of variable step sizes with regard to flexible criteria. Also, for the proposed MPPT implementation, a simple Discontinuous Conduction Mode (DCM) algorithm is considered. Experimental results of the proposed FLC based MPPT show that an improvement is observed in terms of tracking of the MPPT, and maximizing of the output power of the PV modules compared to the conventional Perturb and Observe (P&O) algorithm.","PeriodicalId":156411,"journal":{"name":"2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123854910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
A unified converter topology for Electric Spring 一个统一的转换器拓扑为电气弹簧
2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) Pub Date : 2016-06-27 DOI: 10.1109/PEDG.2016.7527011
C. Lee, Heng Liu, G. Zhang, Shuo Yan, E. Waffenschmidt, R. Hui
{"title":"A unified converter topology for Electric Spring","authors":"C. Lee, Heng Liu, G. Zhang, Shuo Yan, E. Waffenschmidt, R. Hui","doi":"10.1109/PEDG.2016.7527011","DOIUrl":"https://doi.org/10.1109/PEDG.2016.7527011","url":null,"abstract":"Recently, Electric Spring (ES) technology is proposed to solve the power quality issues due to high penetration of distributed renewable energy generation. A variety of topologies and compensation methods have been proposed to solve the power quality issues. This paper proposes a unified converter topology for ES, which combines series and shunt power compensators for simultaneous active and reactive power compensation. The new topology is implemented on a conventional three-phase full-bridge module, which benefits the reduction of cost for the converter. Corresponding operating principles of this converter are developed and verified through practical measurements.","PeriodicalId":156411,"journal":{"name":"2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125140710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
FixReF: A control strategy for offshore wind farms with different wind turbine types and diode rectifier HVDC transmission FixReF:具有不同风力涡轮机类型和二极管整流HVDC传输的海上风电场的控制策略
2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) Pub Date : 2016-06-27 DOI: 10.1109/PEDG.2016.7527013
Cord Prignitz, H. Eckel, S. Achenbach, Friedemann Augsburger, Andre Schon
{"title":"FixReF: A control strategy for offshore wind farms with different wind turbine types and diode rectifier HVDC transmission","authors":"Cord Prignitz, H. Eckel, S. Achenbach, Friedemann Augsburger, Andre Schon","doi":"10.1109/PEDG.2016.7527013","DOIUrl":"https://doi.org/10.1109/PEDG.2016.7527013","url":null,"abstract":"Offshore wind farms built at a long distance from the onshore grid are connected via HVDC-transmission. Future HVDC-systems may connect offshore wind farms via uncontrolled diode rectifiers instead of VSC-HVDC converters. Due to this wind turbine inverters must own a grid forming capability. This paper describes a control strategy that requires only minor changes in the conventional wind turbine inverter control software to form the AC-voltage in the offshore island grid. It is shown that this strategy allows an interconnection of different wind turbine types considering auxiliary power supply and reactive power sharing.","PeriodicalId":156411,"journal":{"name":"2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134016634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 30
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