2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG)最新文献

{"title":"State-space black-box model identification of a voltage-source converter with LCL filter","authors":"F. Huerta, S. Cóbreces, F. Rodríguez, M. Moranchel, I. Sanz","doi":"10.1109/PEDG.2012.6254056","DOIUrl":"https://doi.org/10.1109/PEDG.2012.6254056","url":null,"abstract":"The paper proposes a multivariable identification method to identify the discrete state-space model of a grid-connected voltage-source converter and LCL filter. The method is based in one of the so-called subspace identification methods: the N4SID method. That kind of methods are based on the QR and the Singular Values decompositions and works with black-box state-space model structures, which mean particularly flexibility in the choice of the model representation. The so obtained discrete state-space model of the converter could be used to design directly the control of the system using advanced control techniques as robust control, optimal control, etc.","PeriodicalId":146438,"journal":{"name":"2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128581749","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}

{"title":"Impact of modulation strategies on power devices loading for 10 MW multilevel wind power converter","authors":"F. Blaabjerg, A. Isidori, F. M. Rossi","doi":"10.1109/PEDG.2012.6254086","DOIUrl":"https://doi.org/10.1109/PEDG.2012.6254086","url":null,"abstract":"This paper focuses on the control and modulation of a three-level Neutral Point Clamped (3L-NPC) back-to-back full scale converter for a 10 MW direct-drive wind turbine, equipped with a Permanent Magnet Synchronous Generator (PMSG). Emphasis is oriented towards the investigation of the power losses in the semiconductor devices of three-level converter adopting continuous and discontinuous PWM modulation strategies. This aspect strongly influences the operation of the converter and directly affects its efficiency. Therefore, a simulation platform is developed in Matlab/Simulink and PLECS environment to analyse the dynamics of the system using different kinds of modulation strategies, identifying which methods can improve the converter efficiency. It is concluded that 60° discontinuous PWM modulation strategies show less power losses in the semiconductor devices and will increase the overall efficiency of the converter.","PeriodicalId":146438,"journal":{"name":"2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116024049","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}

{"title":"A single-phase current-source inverter with active power filter for grid-tied PV systems","authors":"I. T. Roman, L. S. Silva","doi":"10.1109/PEDG.2012.6254025","DOIUrl":"https://doi.org/10.1109/PEDG.2012.6254025","url":null,"abstract":"This work presents a new power decoupling technique for grid-tied current-source inverter (CSI), in grid-connected photovoltaic (PV) systems. Single-phase converters have low-frequency power ripple in the dc-link. The proposed topology is intended to reduce the low frequency power ripple by using an active power filter (APF) on the dc-link, based on a bidirectional buck-boost converter, which provides compensating voltage in a very simple but effective way. The advantages of this configuration are: a) dc-link ripple minimization, b) passive components size reduction, c) improvement of maximum power point tracking (MPPT) performance; and d) compatibility with full range of CSI modulation index (0~1).","PeriodicalId":146438,"journal":{"name":"2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116334267","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}

{"title":"Repetitive current control of an interleaved grid-connected inverter","authors":"M. Abusara, M. Jamil, S. Sharkh","doi":"10.1002/9780470824054.CH8","DOIUrl":"https://doi.org/10.1002/9780470824054.CH8","url":null,"abstract":"Repetitive control can be effective in improving current quality when used with grid-connected inverters. Mathematically, a repetitive controller is equivalent to a parallel combination of resonant controllers with high gain at the fundamental frequency and its harmonics, and accordingly good disturbance rejection can be achieved at these frequencies. To ensure stability, a low-pass filter needs to be incorporated within the repetitive controller to attenuate the high frequency resonant peaks of the controller gain (above the system's cross-over frequency), without significantly affecting the low frequency resonant peaks corresponding to significant grid harmonics that need to be rejected. The paper therefore argues that it is desirable that the system and the inverter's output filter should have a high bandwidth - higher than the most significant grid harmonics - which may be counter intuitive. The high bandwidth requirement dictates a high PWM switching frequency, which becomes challenging in high power systems as the maximum achievable switching frequency of power electronic devices reduces as their power rating increases. This limitation can be overcome in low voltage systems by using an interleaved inverter topology in which the power is shared between several 2-level half-bridge inverter legs connected in parallel. In addition to using low power devices capable of high switching frequency, the value of the LC output filter capacitance can be relatively very small thanks to the ripple cancellation feature of the interleaved inverter. Both of these features mean that the bandwidth of an interleaved inverter can be much higher than that achievable using a classical 2-level inverter with an LCL output filter. The paper discusses the design and practical implementation of a repetitive controller for an interleaved inverter with 6 half-bridge legs per phase. Simulation and experimental results are also presented to demonstrate the effectiveness of the proposed controller in improving the THD of the output current of the inverter.","PeriodicalId":146438,"journal":{"name":"2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127204366","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}

{"title":"An overview of power topologies for micro-hydro turbines","authors":"S. Nababan, E. Muljadi, F. Blaabjerg","doi":"10.1109/PEDG.2012.6254084","DOIUrl":"https://doi.org/10.1109/PEDG.2012.6254084","url":null,"abstract":"This paper is an overview of different power topologies of micro-hydro turbines. The size of micro-hydro turbine is typically under 100kW. Conventional topologies of micro-hydro power are stand-alone operation used in rural electrical network in developing countries. Recently, many of micro-hydro power generations are connected to the distribution network through power electronics (PE). This turbines are operated in variable frequency operation to improve efficiency of micro-hydro power generation, improve the power quality, and ride through capability of the generation. In this paper our discussion is limited to the distributed generation. Like many other renewable energy sources, the objectives of micro-hydro power generation are to reduce the use of fossil fuel, to improve the reliability of the distribution system (grid), and to reduce the transmission losses. The overview described in this paper includes micro-hydro power generation, stand-alone topologies, fixed speed generation (FSG), variable speed generation (VSG), direct-connected grid integration topology, and PE grid integration topologies.","PeriodicalId":146438,"journal":{"name":"2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126246252","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}

{"title":"Optimal interconnection device for distributed energy resources of customer","authors":"W. Chae, Juyong Kim, Jintae Cho, Jungsung Park","doi":"10.1109/PEDG.2012.6254104","DOIUrl":"https://doi.org/10.1109/PEDG.2012.6254104","url":null,"abstract":"This paper proposes a smart switch panel (SSP) that can link distributed generations more economically and actively to improve power quality for customers, prevent power failure through independent operation in case of power failure in electric power systems (EPS), and trade electricity with Smart Grid operation systems as they become more widespread. For the economical interconnection of distributed generations and to reduce installation spaces, a power converter was installed in the switch panel, and the power converter was proposed in a form wherein diverse distributed generations share the DC link and inverter. A static transfer switch (STS) was installed so that customers can prevent power failure through independent operation even in case of EPS failure. An intelligent electronic device (IED) was installed so that power can be exchanged with EPS or nearby customers and to enable protection control so that all current standards for the interconnection of distributed generations are met.","PeriodicalId":146438,"journal":{"name":"2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127728628","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}

{"title":"Power planning for aircraft obstacle lighting","authors":"Wei-Chen Liu, Ming Chang, Tzu-Wei Yu, C. Moo","doi":"10.1109/PEDG.2012.6253983","DOIUrl":"https://doi.org/10.1109/PEDG.2012.6253983","url":null,"abstract":"The aircraft obstacle lights on the power transmission towers, which are located at the places without the utility mains, are powered mainly by solar cells and subordinately by rechargeable batteries. The power supply with solar cells and batteries are configured and coordinated according to the weather conditions. The designed power capacities are to keep the aircraft obstacle lighting system uninterruptable either under the drastic weather variation or a long period of insufficient sunlight. An exemplar case is planned on the basis of the local weather data in recent 6 years. A more economical and precise planning is made for the capacities of solar cells and batteries. The design has demonstrated, through simulations, the feasibility and the accuracy in reality.","PeriodicalId":146438,"journal":{"name":"2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129105255","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}

{"title":"Unified compensation control of a hybrid energy storage system for enhancing power quality and operation efficiency in a diesel and wind-turbine based stand-alone microgrid","authors":"J. Jeon, Jong-Yul Kim, Seul-Ki Kim, Jang-Mok Kim","doi":"10.1109/PEDG.2012.6254012","DOIUrl":"https://doi.org/10.1109/PEDG.2012.6254012","url":null,"abstract":"An intermittent power of renewable sources such as wind turbine and photovoltaic system can damage power quality and operation efficiency of generator. Specially, in case of standalone microgrid such as island power system, this intermittent characteristic of renewable resource can lead to severe problems, such as frequency oscillation and power fluctuation. This frequency oscillation and power fluctuation can be a cause of system stability problem and operation efficiency drop. This paper presents unified compensation control strategy of a hybrid electric energy storage system in order to improve power quality and operating efficiency in a diesel and wind-turbine based stand-alone microgrid. This study addressed an AC hybrid energy storage system which was composed of lead acid battery storage and electric double layered capacitor, and presented a compensation control strategy with modified droop and wind power compensation for damping system frequency and power fluctuation. Usefulness of the proposed control algorithm is verified by experimental test results for system frequency, voltage, power fluctuation of the generator, and operation efficiency. Comparison tests with conventional compensation methods were performed to validate the effectiveness of the proposed control method.","PeriodicalId":146438,"journal":{"name":"2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129027421","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}

{"title":"A control strategy of hybrid active filter to compensate unbalanced load in three-phase three-wire power system","authors":"Yen-Ching Wang, Tzung-Lin Lee","doi":"10.1109/PEDG.2012.6254041","DOIUrl":"https://doi.org/10.1109/PEDG.2012.6254041","url":null,"abstract":"This paper presents a control strategy of hybrid active filter for compensation of the three-phase three-wire industrial power system considering unbalanced loading. In addition to harmonic current compensation, the hybrid filter is designed to compensate both positive- and negative-sequence reactive power based on the so-called instantaneous power theory. Therefore, the compensated system behaves as a resistive network even in a reactive, nonlinear, or unbalanced circuit. Theoretical analysis and experimental results are given to verify effectiveness of the proposed method.","PeriodicalId":146438,"journal":{"name":"2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134165443","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}

{"title":"An integrated four-port full-bridge converter with DMPPT for renewable power system","authors":"Hongfei Wu, K. Sun, Zihu Zhou, Y. Xing","doi":"10.1109/PEDG.2012.6254107","DOIUrl":"https://doi.org/10.1109/PEDG.2012.6254107","url":null,"abstract":"In order to involve multiple different renewable energy sources and balance power flow, a four-port full-bridge converter (FPFBC) with distributed maximum power point tracking (DMPPT) is proposed for renewable power systems. This converter, featuring two input ports, one bidirectional port and one isolated output port, is derived by integrating two Buck-Boost converters and a full-bridge converter. The switching legs are shared by the Buck/Boost converter and full-bride converter. Hence, single stage conversion between any two of the ports is achieved. As a result, high power density and high efficiency can be guaranteed. DMPPT is realized on the two input ports connecting to different renewable sources, which ensures maximum renewable energy harvest. A pulse-width modulation plus phase angle shift control scheme and a power control strategy are presented for the FPFBC to implement the power management of the four ports. The operation modes and principles of the proposed converter, along with the design considerations, are discussed in detail. Simulation and experimental results verify the feasibility and effectiveness of the proposed converter.","PeriodicalId":146438,"journal":{"name":"2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130308460","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}