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Project no. 019794 Project acronym: UNIFLEX-PM Project title: Advanced Power Converters for Universal and Flexible Power Management in Future Electricity Networks Instrument: Specific Targeted Research or Innovation Project Thematic Priority: 6.1.ii Sustainable Energy Systems Publishable Final Activity Report Period covered: from 1 March 2006 to 31 August 2009 Date of preparation: 30/11/2009 Start date of project: 1 March 2006 Duration: 3.5 years Project coordinator name: Andrew R Hyde Project coordinator organisation name: AREVA Issue A EC Contract n°: 019794 (SES6) EUROPEAN COMMISSION DIRECTORATE J – ENERGY Page : UNIFLEX-PM 2 of 21 Publishable Final Activity Report YES Distribution List: AREVA UNOTT AAU EPFL UGDIE ABB DSL EPE EC DIRECTORATE J – ENERGY External Community NO E D C B A 01/01/2010 A R Hyde All Partners All Partners PU 30/11/2009 A R Hyde All Partners All Partners I Drafted Checked Approved Status* Rev. Date * I: Internal; PP: Restricted to Programme participant; RE: Restricted to specified group; CO: Confidential; PU: Public UNIFLEX-PM REFERENCE W1 AR DV 0009 A 01/01/10 Internal partner reference: Filing N° Doc.Type Order N° Rev. N° Date _________________________________________________________________________________________________________ AREVA – UNOTT – AAU - EPFL – UGDIE – ABB – DSL – EPE EC Contract n°: 019794 (SES6) EUROPEAN COMMISSION DIRECTORATE J – ENERGY Page : UNIFLEX-PM 3 of 21 REVISION First issue Issue A: 1 January 2010 UNIFLEX-PM REFERENCE W1 AR DV 0009 A 01/01/10 Internal partner reference: Filing N° Doc.Type Order N° Rev. N° Date _________________________________________________________________________________________________________ AREVA – UNOTT – AAU - EPFL – UGDIE – ABB – DSL – EPE EC Contract n°: 019794 (SES6) EUROPEAN COMMISSION DIRECTORATE J – ENERGY Page : UNIFLEX-PM 4 of 21 1. Project Execution The overall objective of UNIFLEX-PM was the development and experimental verification of new, innovative modular power conversion architectures for universal application in the future European electricity network. The research focused on technology suitable for addressing emerging problems and requirements in electricity networks. More importantly, the project sought to establish technology that supported implementation of certain SmartGrids scenarios and deep penetration of distributed energy generation technologies. The work conducted in the project was at the cutting edge of research in modular, high-power converters for grid applications and the 3-phase, AC-AC modular converter assembled in the project is a “world first”. The UNIFLEX-PM team of partners are world-class in their fields of expertise and combine leaders in R&D and major OEMs. Partner AREVA T&D, UK University of Nottingham, UK Aalborg University, DK Ecole Polytechnique Federale de Lausanne, CH Uniersita degli Studi di Genova, IT ABB, CH Dynex Semiconductor, UK European Power Electronics Association, BE Role Coordinator Beneficiary Beneficiary Beneficiary Beneficiary Beneficiary Beneficiary Beneficiary The work has been performed in seven interconnected work packages that focused on: Emerging and future application requirements and priorities Converter structures Isolation modules Control and grid interaction Reliability and economics Technology validation 1.1 Emerging and future application requirements and priorities The overall objective of this unit of work was to determine the performance requirements, electrical specifications and control requirements for innovative power electronic converters, represented by the UNIFLEX-PM logo in figure 1, in the future European electricity network. UNIFLEX-PM REFERENCE W1 AR DV 0009 A 01/01/10 Internal partner reference: Filing N° Doc.Type Order N° Rev. N° Date _________________________________________________________________________________________________________ AREVA – UNOTT – AAU - EPFL – UGDIE – ABB – DSL – EPE EC Contract n°: 019794 (SES6) EUROPEAN COMMISSION DIRECTORATE J – ENERGY Page : UNIFLEX-PM 5 of 21 Figure 1: Power electronic converters represented by the UNIFLEX-PM logo Functionalities considered included: Voltage ratio adjustment Frequency changing Phase changing Asymmetric load current cancellation Voltage asymmetry cancellation Reactive power control Active power control Harmonic cancellation UPFC like function Low voltage ride-through capabilities PMU like function Individual control of active and reactive power per phase in all ports, e.g. Enhanced lowvoltage fault ride-through, Enhanced grid support during asymmetrical faults. Island operation Black-start capability Potential uses of the UNIFLEX-PM system include Active Node and DG Interface. In both, the UNIFLEX-PM system is “seen” as an “intelligent” transformer that can replace the classical iron based solutions. However, due to the unique features of this system, more flexibility in the power management and control of the distribution networks is obtained. UNIFLEX-PM REFERENCE W1 AR DV 0009 A 01/01/10 Internal partner reference: Filing N° Doc.Type Order N° Rev. N° Date _________________________________________________________________________________________________________ AREVA – UNOTT – AAU - EPFL – UGDIE – ABB – DSL – EPE EC Contract n°: 019794 (SES6) EUROPEAN COMMISSION DIRECTORATE J – ENERGY Page : UNIFLEX-PM 6 of 21 Figure 2: UNIFLEX-PM system as an Active Node in Future Distribution Networks. 1.2 Converter structures The overall objective of this unit of work was to develop, and validate through simulation, multicellular, modular and scalable converter concept(s) that can be used in various configurations to meet the requirements defined in WP2. The work included: developing multi-cellular, modular converter structures, using a common set of "building blocks" to meet various application requirements establishing simulation models of proposed converter structures and validating their basic operation. develop local converter control and modulation concepts for energy flow control within the converter Investigation of the incorporation of redundancy into the modular converter concept. The study included investigation of optimised modulation strategies such as Selective Harmonic Elimination (SHE), and focussed on the application of these modulation strategies to multi-cellular UNIFLEX-PM REFERENCE W1 AR DV 0009 A 01/01/10 Internal partner reference: Filing N° Doc.Type Order N° Rev. N° Date _________________________________________________________________________________________________________ AREVA – UNOTT – AAU - EPFL – UGDIE – ABB – DSL – EPE EC Contract n°: 019794 (SES6) EUROPEAN COMMISSION DIRECTORATE J – ENERGY Page : UNIFLEX-PM 7 of 21 converters in an effort to control the power flow between the cells of the structure. Also, the potential increase in waveform quality at low device switching frequency was investigated. Such modulation strategies may perform better than other approaches, e.g.Phase Shifted Carrier PWM (PSC-PWM) methods. 1.3 Isolation Modules Two different variants of the UNIFLEX-PM can be considered, based on either DC-DC isolation or on AC-DC (cycloconverter) isolation. This required the study of two different isolation modules, the first using a transformer operating between two voltage sources, the second with a voltagesource converter at the primary side, and a current-source at the secondary side as illustrated in Figure 3 Figure 3: Voltage Source Inverter Basic Module (VSIBM) which provides DC-DC isolation Figure 4: Cycloconverter Basic Module (CBM) which provides AC-DC isolation These were examined in detail and their performance compared, collating information such as efficiency and performance to define which one is the best for use in the technology validation phase. UNIFLEX-PM REFERENCE W1 AR DV 0009 A 01/01/10 Internal partner reference: Filing N° Doc.Type Order N° Rev. N° Date _________________________________________________________________________________________________________ AREVA – UNOTT – AAU - EPFL – UGDIE – ABB – DSL – EPE EC Contract n°: 019794 (SES6) EUROPEAN COMMISSION DIRECTORATE J – ENERGY Page : UNIFLEX-PM 8 of 21 Two Medium Frequency Transformers (MFT) were constructed for each isolation module examined. A picture of the core and windings of the two constructed MFTs are given in Figure 4. Figures 4(a) shows the active part of VSIBM. Figure 4(b) shows the active part of CBM. Both isolation transformers utilized the same tank dimensions. A picture of the final assemblage of CBM MFT is depicted in Figure 5. The VSIBM MFT has the same physical appearance. (a) (b) Figure 4: Pictures of the medium frequency transformers. (a) VSIBM, (b) CBM. Figure 5: Picture of final assemblage of MFT. UNIFLEX-PM REFERENCE W1 AR DV 0009 A 01/01/10 Internal partner reference: Filing N° Doc.Type Order N° Rev. N° Date _________________________________________________________________________________________________________ AREVA – UNOTT – AAU - EPFL – UGDIE – ABB – DSL – EPE EC Contract n°: 019794 (SES6) EUROPEAN COMMISSION DIRECTORATE J – ENERGY Page : UNIFLEX-PM 9 of 21 The final construction of VSIBM (DC-DC isolation module) is depicted in Figure 6. The medium frequency transformer is naturally cooled and oil insulated. Figure 6: 25 kVA VSIBM prototype. Illustrative experimental results of the MFT converter are shown in Figure 7. This converter was also tested at a higher switching frequency. Figure 7: Experimental results - MFT voltages and currents at rated power (25 kW). UNIFLEX-PM REFERENCE W1 AR DV 0009 A 01/01/10 Internal partner reference: Filing N° Doc.Type Order N° Rev. N° Date _________________________________________________________________________________________________________ AREVA – UNOTT – AAU - EPFL – UGDIE – ABB – DSL – EPE EC Contract n°: 019794 (SES6) EUROPEAN COMMISSION DIRECTORATE J – ENERGY Page : UNIFLEX-PM 10 of 21 Comparisons were made between the different modules in terms of electrical conversion efficiency, operation complexity, commutations, etc. The theoretical efficiency comparison is depicted in Figure 8. This figure presents the results of VSIBM and CBM operating with two different modulations (CBM-2n means CBM at two-level modulation, CBM-3n means CBM operating with 3-level modulation). This led to the selection of the module to use in the technology validation platform. Efficiency (no inductors) 95.00% 94.50% 94.00% 93.50% 93.00% 92.50% 92.00% VSIBM CBM-2n CBM-3n Figure 8: Isolation module efficiency comparison. 1.5 Control and Grid Integration The objective of this unit of work was to research overall control structures for the projects modular converters to achieve: High power quality interface with the grid with minimised converter losses. Controlled interaction with the grid and energy sources/storage Energy management of intermittent generation and energy storage. Enhanced network stability and reliability. Possibility of coordinated control of converters across a network. The control strategies investigated were based on a two port structure of the UNIFLEX-PM system as shown in Figure 9. The rated parameters used in modelling were similar to those included in the technology validation platform. UNIFLEX-PM REFERENCE W1 AR DV 0009 A 01/01/10 Internal partner reference: Filing N° Doc.Type Order N° Rev. N° Date _________________________________________________________________________________________________________ AREVA – UNOTT – AAU - EPFL – UGDIE – ABB – DSL – EPE EC Contract n°: 019794 (SES6) EUROPEAN COMMISSION DIRECTORATE J – ENERGY Page : UNIFLEX-PM 11 of 21 Figure 9: Two port structure of the Uniflex-PM with DC-link interleaving. Comprehensive analysis of control strategies employed in multilevel cascaded H-bridge converters was undertaken. Based on the analysis of this study and partners experience four control structures were considered: Natural reference frame control with resonant controllers – with neutral treated Stationary reference frame control with resonant controllers – with neutral un-treated Natural reference frame control with Predictive controllers– with neutral treated Synchronous reference frame control with PI controllers– with neutral un-treated The general structures of a single-phase and three-phase PLL including the grid voltage monitoring are presented in Figure 10, respectively. UNIFLEX-PM REFERENCE W1 AR DV 0009 A 01/01/10 Internal partner reference: Filing N° Doc.Type Order N° Rev. N° Date _________________________________________________________________________________________________________ AREVA – UNOTT – AAU - EPFL – UGDIE – ABB – DSL – EPE EC Contract n°: 019794 (SES6) EUROPEAN COMMISSION DIRECTORATE J – ENERGY Page : UNIFLEX-PM 12 of 21 Figure 10: Structure of the single phase PLL system. Figure 11: Structure of a three-phase PLL system. Typically, the main variation between the different single-phase PLL methods examined was the generation structure of the orthogonal voltage system. Performance of the four control structures was critically analysed with the result informing the approach used for the technology validation platform. 1.6 Reliability and Economics The key objectives of the reliability and economics study were: definition and parameterisation of reliability models for the analysed configurations, taking into account conditions related to the operating environment preliminary assessment of the impacts deriving from the adoption of the proposed solution through a technical and economic comparison with a reference case The work involved identification of the basic components reliability performances in real operating conditions, based on field test results and models. This was followed by a phase that dealt with developing the models for different UNIFLEX-PM architectures, to identify the reliability and availability (performability) characteristics of each basic configuration by combinatorial methods (based for instance on Reliability Block Diagrams) and a state-space analysis. The final stage of the study focused on Impact Analysis, which developed an estimate of the impact on availability of different architectures and methods of use. UNIFLEX-PM REFERENCE W1 AR DV 0009 A 01/01/10 Internal partner reference: Filing N° Doc.Type Order N° Rev. N° Date _________________________________________________________________________________________________________ AREVA – UNOTT – AAU - EPFL – UGDIE – ABB – DSL – EPE EC Contract n°: 019794 (SES6) EUROPEAN COMMISSION DIRECTORATE J – ENERGY Page : UNIFLEX-PM 13 of 21 The study included comparison of the reliability of UNIFLEX-PMagainst a reference case. The example chosen was a High Voltage Direct Current (HVDC) converter, having a four quadrant operation capability. Figure 12 shows the complete system structure breakdown for the evaluated M2LC based HVDC architecture, where a red box refers to the subsystem hierarchical level, a green box refers to the assembly hierarchical level and a yellow box refers to the item hierarchical level. M2LC based HVDC application Input filter AC/DC Converter IGBT module Resistor Inductor Inductor Gate driver Capacitor DC/AC Converter IGBT module Inductor Isolation I/O transformer Output filter Gate driver Capacitor Control FPGA board Resistor Inductor Transducers system DSP board Voltage transducer Current transducer Figure 12: Breakdown of the M2LC based HVDC application Using the project software availability analysis of UNIFLEX-PM and the reference case were performed. In order to make a fair comparison between the two solutions, simulations were carried out taking into account different working conditions, different architectures, different technologies for DC link capacitors and different maintenance policies. The first set of simulations sought to: estimate the basic availability performances of the two solutions and evaluate if they are comparable or not. This was important because it allows assessment whether UNIFLEXPM has the potential for becoming a competitive product in identified market sectors investigate the impact of different technological and architectural solutions on UNIFLEXPM availability performances. Examples of studies included evaluation of the impact of preventive maintenance actions on electrolytic capacitors and the effect of logistic delays. In Table 1 an illustration of results of simulations is reported; with each simulation covering a time interval of 90,000 hours. UNIFLEX-PM REFERENCE W1 AR DV 0009 A 01/01/10 Internal partner reference: Filing N° Doc.Type Order N° Rev. N° Date _________________________________________________________________________________________________________ AREVA – UNOTT – AAU - EPFL – UGDIE – ABB – DSL – EPE EC Contract n°: 019794 (SES6) EUROPEAN COMMISSION DIRECTORATE J – ENERGY Page : UNIFLEX-PM 14 of 21 Mean Availability MTTFF Value [%] SD [%] Value [h] SD [h] UNIFLEX-PM (electrolytic capacitors) – base working conditions No redundancy 99.1 2e-5 22367 151 4-out-of-5 redundancy 99.8 1e-5 35686 126 12-out-of-13 redundancy 99.7 1e-5 32598 132 UNIFLEX-PM (electrolytic capacitors) – rated working conditions No redundancy 99.1 2e-5 22965 151 4-out-of-5 redundancy 99.8 1e-5 36103 124 12-out-of-13 redundancy 99.7 1e-5 33052 131 UNIFLEX-PM (electrolytic capacitors) – real working conditions No redundancy 99.2 2e-5 25182 154 4-out-of-5 redundancy 99.8 1e-5 37012 120 12-out-of-13 redundancy 99.8 1e-5 34573 127 UNIFLEX-PM (film capacitors) – base working conditions No redundancy 99.8 1e-5 27196 242 4-out-of-5 redundancy 99.9 7e-6 56826 306 12-out-of-13 redundancy 99.9 9e-6 46760 287 UNIFLEX-PM (film capacitors) – rated working conditions No redundancy 99.8 1e-5 28233 249 4-out-of-5 redundancy 99.9 6e-6 58513 303 12-out-of-13 redundancy 99.9 8e-6 49391 289 UNIFLEX-PM (film capacitors) – real working conditions No redundancy 99.9 1e-5 31874 270 4-out-of-5 redundancy 99.9 6e-6 62091 309 12-out-of-13 redundancy 99.9 7e-6 54111 300 M2LC based HVDC system Base 99.9 1e-5 28314 250 Rated conditions 99.9 1e-5 28660 254 Real working conditions 99.9 1e-5 29188 256 Failures 29.4 8.1 8.3 29.2 8.2 8.2 28.8 8.0 8.1 4.0 0.9 1.5 3.9 0.9 1.4 3.4 0.8 1.3 3.5 3.4 3.4 Table 1: Summary of the dependability performances The results show that the performance of the UNIFLEX-PM system (base architecture, no redundancy) and the M2LC solution are comparable in terms of availability and MTTFF and indicate that the UNIFLEX-PM architecture could be successfully industrialized. More detailed analysis allowed identification of design and operational windows plus approaches to be taken to maximise reliability whilst seeking to minimise cost of ownership. 1.7 Technology Validation The purpose of this unit or work was to build and evaluate a UNIFLEX-PM converter to validate the modular converter concept and its control. Specific objectives are: Detailed design of hardware converter. Construction of converter hardware. UNIFLEX-PM REFERENCE W1 AR DV 0009 A 01/01/10 Internal partner reference: Filing N° Doc.Type Order N° Rev. N° Date _________________________________________________________________________________________________________ AREVA – UNOTT – AAU - EPFL – UGDIE – ABB – DSL – EPE EC Contract n°: 019794 (SES6) EUROPEAN COMMISSION DIRECTORATE J – ENERGY Page : UNIFLEX-PM 15 of 21 Performance evaluation and validation of converter hardware and its control. Validation of modelling studies Detailed design of the final converter structure was performed, with completion in the first half of the project. In the same period, twelve medium frequency transformers, based on the DC/DC converter isolation module were fabricated. These were combined with the isolation modules. Construction and assembly of the final complete multi-cellular converter was carried out at the University of Nottingham, see figures 13 - 16. Figure 13: Eleven UNIFLEX-PM cells mounted on the transformer base plate UNIFLEX-PM REFERENCE W1 AR DV 0009 A 01/01/10 Internal partner reference: Filing N° Doc.Type Order N° Rev. N° Date _________________________________________________________________________________________________________ AREVA – UNOTT – AAU - EPFL – UGDIE – ABB – DSL – EPE EC Contract n°: 019794 (SES6) EUROPEAN COMMISSION DIRECTORATE J – ENERGY Page : UNIFLEX-PM 16 of 21 Figure 14: MV switchgear, pre-charge circuit and fuses for the UNIFLEX-PM prototype Figure 15: Medium Voltage gate drive and current transformer, the single turn silicone cable may be observed. Figure 16: DSP/FPGA control stack and fibre optic interface cards UNIFLEX-PM REFERENCE W1 AR DV 0009 A 01/01/10 Internal partner reference: Filing N° Doc.Type Order N° Rev. N° Date _________________________________________________________________________________________________________ AREVA – UNOTT – AAU - EPFL – UGDIE – ABB – DSL – EPE EC Contract n°: 019794 (SES6) EUROPEAN COMMISSION DIRECTORATE J – ENERGY Page : UNIFLEX-PM 17 of 21 The converter was commissioned in sections over a period of six months. The first three months of this involved testing and adjusting of the DC/DC converters using the PI controllers and ensuring that the modulation produced from the control cards was of the required quality when produced at the converter terminals. Figure 17: UNIFLEX-PM prototype converter in Medium Voltage test facility Figure 18: UNIFLEX-PM converter two port configuration for Medium Voltage testing The operation of the converter with port one connected as a rectifier to a 415V power system required finalisation of the memory mapping of three FGPA cards into the DSP memory space. Once this was achieved the operation of the nine H-Bridges configured as a three phase seven level converter with DC side isolation provided by the DC/DC converters was achieved. This was followed by results for a two port converter connected to two 415V grids. This configuration was used for the following tests: Testing of the connection of two asynchronous grids Testing of the independent power control of the two converter ports Validation of the current and voltage control methods for the two port converter Validation of the voltage balancing strategy which ensure energy is distributed amongst the converter cells equally Once completed, configuration of the converter for operation at Medium Voltage was carried out. The final configuration of the converter in the Medium voltage test facility is shown in Figures 17 and 18. This allowed completion of the planned testing of the two port configuration under different working conditions. An example of such a test is shown in Figure 19 with its simulated result in Figure 20. Figure 19 shows the supply voltage, converter voltage and supply current for the two converter ports when about 205kW of power is being drawn from the grid at port one and delivered to the grid at port two. The simulation results for the same conditions are shown in Figure 20 and it is observed that there is a close matching of the results for these two figures. UNIFLEX-PM REFERENCE W1 AR DV 0009 A 01/01/10 Internal partner reference: Filing N° Doc.Type Order N° Rev. N° Date _________________________________________________________________________________________________________ AREVA – UNOTT – AAU - EPFL – UGDIE – ABB – DSL – EPE EC Contract n°: 019794 (SES6) EUROPEAN COMMISSION DIRECTORATE J – ENERGY Page : UNIFLEX-PM 18 of 21 Post project work continues on building the experimental knowledge base, which will support the UNIFLEX-PM technology exploitation stage. Figure 19: Experimental AC waveforms for port 1 (top) and port 2 (bottom) with power flowing from port 1 to port 2 (205kW approx.) Figure 20: Simulated AC waveforms for port 1 (top) and port 2 (bottom) with power flowing from port 1 to port 2 (205kW approx.) UNIFLEX-PM REFERENCE W1 AR DV 0009 A 01/01/10 Internal partner reference: Filing N° Doc.Type Order N° Rev. N° Date _________________________________________________________________________________________________________ AREVA – UNOTT – AAU - EPFL – UGDIE – ABB – DSL – EPE EC Contract n°: 019794 (SES6) EUROPEAN COMMISSION DIRECTORATE J – ENERGY Page : UNIFLEX-PM 19 of 21 Additional information on UNIFLEX-PM, including the public deliverables (Table 2) that arise from the different work packages can be downloaded from the project website: http://www.eee.nott.ac.uk/uniflex/. This site includes contact details for further information. Deliverable D2.1 D3.1 D4.1 D6.1 D5.1 D1.1 D6.2 D7.2 Deliverable Name Report detailing converter applications in Future European Electricity Network Report on converter structures Final report on comparison of modules Report on reliability models Report on control strategies Reality Check report Final report on reliability and impact Report detailing performance of technology validation hardware and validation of modelling studies Table 2: Summary of public deliverables 2. Dissemination and Use The prime exploitable result from UNIFLEX-PM is the overall design of the multi-port UNIFLEXPM converter which has potential application in a range of future distribution grid scenarios, which include SmartGrid and the deep penetration of zero CO2 distributed energy resources. Industrial partners ABB and AREVA have all of the necessary skills and facilities to commercially exploit this developed technology. The second exploitable result arising from the project is the advanced reliability/availability modelling tools. These can be adapted to other network equipment to allow evaluation of network acceptability and routes to minimise cost of ownership and design and exploitation risks. The University of Genova are available to work with organisations on use of these tools. The University partners have developed and retained their global leading knowledge in power electronic systems for medium voltage network applications. This represents the third exploitable result. They will use this to further advance UNIFLEX-PM, e.g. through timely establishment of modules containing high voltage, wide-band semiconductors and investigating other competing, advanced solutions. Extensive dissemination of UNIFLEX-PM has already been undertaken by a series of meetings and colloquium, this includes focused sessions at EPE 2007, CIRED 2007 and EPE 2009 and separate UNIFLEX-PM REFERENCE W1 AR DV 0009 A 01/01/10 Internal partner reference: Filing N° Doc.Type Order N° Rev. N° Date _________________________________________________________________________________________________________ AREVA – UNOTT – AAU - EPFL – UGDIE – ABB – DSL – EPE EC Contract n°: 019794 (SES6) EUROPEAN COMMISSION DIRECTORATE J – ENERGY Page : UNIFLEX-PM 20 of 21 discussions with key exploitation stakeholders. In addition, a total of 29 technical papers have already been published by the partners (table 3). Paper Title Lead Partner Partners Conference Location & Date Advanced Power Converter for Universal and Flexible Power Management in Future Electricity Network Predictive current control of a 7-level AC-DC back-to-back converter for Universal and Flexible Power Management system Power flow control through a multi-level Hbridge based power converter for Universal and Flexible Power Management in future electrical grids A stationary reference frame current control for a multi-level H-bridge power converter for universal and flexible power management in future electricity Sliding mode observer design for universal flexible power management (Uniflex-PM) structure Advanced integration of multilevel converters into power system AAU Consortium currently no info available UNOTT UNOTT, AAU UNOTT UNOTT, AAU Translation of the CIRED paper in the Brasilian Journal “Eletricidade Moderna” Power Electronics and Motion Control Conference, 2008. EPE-PEMC 2008. 13th Power Electronics and Motion Control Conference, 2008. EPE-PEMC 2008. 13th AAU AAU, UNOTT, EPFL Power Electronics Specialists Conference, 2008. PESC 2008. IEEE Rhodes, Greece, June 2008 UNOTT UNOTT Orlando, Florida, November 2008 UNOTT UNOTT, EPFL UNOTT UNOTT Industrial Electronics, 2008. IECON 2008. 34th Annual Conference of IEEE Industrial Electronics, 2008. IECON 2008. 34th Annual Conference of IEEE IEEE Transactions on Industrial Electronics UNOTT UNOTT European Power Electronics Conference, EPE 2007 UNOTT UNOTT, EPFL European Power Electronics Conference, EPE 2009 Aalborg, Denmark, Sept. 2007 Barcelona, Spain , Sept. 2009 UNOTT UNOTT European Power Electronics Conference, EPE 2009 Barcelona, Spain , Sept. 2009 AAU (F. Iov) Consortium Vienna, Austria, May 2007 UNOTT (J. Clare) UNOTT (J. Clare) UNOTT, AREVA UNOTT, AREVA CIRED 2007 19th International Conference on Electricity Distribution CIRED 2007 UNOTT (J. Clare) UNOTT (J. Clare) UNOTT A Complete Harmonic Elimination Approach to DC Link Voltage Balancing for a Cascaded Multilevel Rectifier A selective harmonic elimination system for restoring and equalising DC link voltages in a multilevel active rectifier A Novel Multilevel Converter Structure Integrated into Power Systems and its Performance Evaluation A Phase Shift Selective Harmonic Elimination Method for balancing capacitor voltages in a seven level Cascaded H-Bridge Rectifier Advanced Power Converter for Universal and Flexible Power Management in Future Electricity Network UNIFLEX-PM Workshop at CIRED 2007 UNIFLEX-PM Workshop at EPE 2007 The UNIFLEX project UNIFLEX PM - Advanced Power Converters for Universal and Flexible Power Management in Future Electricity Networks UNOTT European Power Electronics Conference, EPE 2007 CPES Workshop, Invited Seminar PEMC Group Conference 2007 Poznan, Poland Sept. 2008 Poznan, Poland Sept. 2008 Orlando, Florida, November 2008 Dec. 2007 Vienna, Austria, May 2007 Aalborg, Denmark, Sept. 2007 Lake Louise, Canada, Oct. 2008 Nottingham, UK Sept. 2007 UNIFLEX-PM REFERENCE W1 AR DV 0009 A 01/01/10 Internal partner reference: Filing N° Doc.Type Order N° Rev. N° Date _________________________________________________________________________________________________________ AREVA – UNOTT – AAU - EPFL – UGDIE – ABB – DSL – EPE EC Contract n°: 019794 (SES6) EUROPEAN COMMISSION DIRECTORATE J – ENERGY Page : UNIFLEX-PM 21 of 21 EPE Conference, EPE 2009, Invited Contribution CRISTAL FP6 Project Meeting, Cambridge, UK, Invited Seminar Universidad de Magallanes, Invited Seminar Barcelona, Spain , Sept. 2009 Cambridge, UK, Dec. 2008 UNOTT Universidad Tecnica Federico Santa Maria, Invited Seminar Valparaiso, Chile, March 2009 UNOTT (J. Clare) UNOTT Universidad de Conception, Invited Seminar Chile , April 2009 UNOTT (J. Clare) UNOTT University of Malta, Invited Seminar Malta, April 2009 UNOTT Power Converter Topologies - the UNIFLEX project UNOTT (J. Clare) UNOTT (J. Clare) Nottingham, UK, Sept. 2009 Birmingham, UK, April 2009 UNIFLEX PM - Advanced Power Converters for Universal and Flexible Power Management in Future Electricity Networks UNOTT (P. Wheeler) UNOTT Base reliability analysis for an universal and flexible power management system UGDIE - High Power IGBT module technology for SmartGrid applications Today’s and Tomorrow’s Meaning of Power Electronics within the Grid Interconnection Rendements Energétiques de Convertisseurs DCAC 25kVA Isolés à Deux ou Trois Etages Study and Analysis of a Natural Reference Frame Current Controller for a Multi-Level H-Bridge Power Converter DSL DSL PEMC Group Conference 2009 IET Colloquium of Power Electronics in the Grid, Invited Seminar 1st ECPE Megawatt Power Electronics Workshop, Zurich, March 5-6, Invited Seminar 25th IEEE Convention of Electrical and Electronics Engineers Conference in China EPE 2007 : 12th European Conference on Power Electronics and Applications EPF 2008 : XIIème colloque Electronique de Puissance du Futur PESC 2008 : 39th IEEE Annual Power Electronics Specialists Conference Aalborg, Denemark, 2 - 5 September 2007 Tours, France, 2 et 3 juillet 2008 The UNIFLEX project - latest results UNIFLEX PM - Advanced Power Converters for Universal and Flexible Power Management in Future Electricity Networks UNIFLEX PM - Advanced Power Converters for Universal and Flexible Power Management in Future Electricity Networks UNIFLEX PM - Advanced Power Converters for Universal and Flexible Power Management in Future Electricity Networks UNIFLEX PM - Advanced Power Converters for Universal and Flexible Power Management in Future Electricity Networks UNIFLEX PM - Advanced Power Converters for Universal and Flexible Power Management in Future Electricity Networks The UNIFLEX project - latest results UNOTT (J. Clare) UNOTT (J. Clare) UNOTT UNOTT (J. Clare) UNOTT UNOTT (J. Clare) UNOTT UNOTT EPFL EPFL AAU Consortium Chile , March 2009 Zurich, Switzerland, March 2009 Eliat, Israel. 3-5 Dec 2008 2008 Rhodes, Greece, 15-19 June 2008. Table 3: Papers presented on UNIFLEX-PM UNIFLEX-PM REFERENCE W1 AR DV 0009 A 01/01/10 Internal partner reference: Filing N° Doc.Type Order N° Rev. N° Date _________________________________________________________________________________________________________ AREVA – UNOTT – AAU - EPFL – UGDIE – ABB – DSL – EPE