IEEE et&d IEEE Workshop on Electronic Power Transmission and Distribution November 7-9, 2017 House of Music, Aalborg, Denmark

Transcription

1 IEEE et&d IEEE Workshop on Electronic Power Transmission and Distribution November 7-9, 2017 House of Music, Aalborg, Denmark

2 IEEE PELS and IEEE PES Launch a New Industry- Focused Workshop on Electronic Power Transmission and Distribution It is our pleasure to invite you to the IEEE Workshop on Electronic Power Transmission and Distribution (et&d) on 7-9 November, 2017, in Aalborg, Denmark. Power electronics is changing from a technology that enables renewable generation and energy-efficiency improvement to the foundational technology for grid modernization. Electronic power transmission and distribution power grids are being envisioned in the near future. The workshop, jointly sponsored by the IEEE Power Electronics Society (PELS) and the IEEE Power & Energy Society (PES), is organized by Aalborg University, Denmark. This year s event will be focused on industry, consisting of 3 Executive sessions, 5 Industry Panel sessions, and 2 Technical E- poster sessions, with over 80 presentations from government, industry, and academia. A tutorial on IEEE Std for interconnecting distributed energy resources with electric power systems, and a technical tour on 1.7 GW (LCC- and MMC-) HVDC station will be provided. All presentations will be archived in the IEEE PELS and PES Resource Centers. If you have any needs during the conference we will do our best to help you. We look forward to seeing you in Aalborg. General Chair Frede Blaabjerg Technical Programme Chair Xiongfei Wang 1

3 Schedule-at-a-glance 2

4 Invited Speakers 3

5 Invited Speakers 4

6 Tuesday, November 7, :00AM 8:30AM Opening session Chair(s): Frede Blaabjerg, Aalborg University, Denmark 8:30AM 10:10AM Executive Session I Chair(s): Frede Blaabjerg, Aalborg University, Denmark Mark McGranaghan, Electric Power Research Institute, USA 8:30AM The Case for (Structured) Microgrids Don Tan, Northrop Grumman Corporation, USA 8:55AM Grid Modernization, Opportunities and Challenges Damir Novosel, Quanta Technology, USA 9:20AM Innovation and Technology to Shape the Power System of the Future Cathy Yao Chen, ABB Corporate Research, Sweden 9:45AM Power Electronics for Resilient Distributed Generation Grids Allen Hefner, National Institute of Standards and Technology & Department of Energy, USA 10:10AM 10:30AM Coffee Break 10:30AM 12:10PM Executive Session II Chair(s): Don Tan, Northrop Grumman Corporation, USA Damir Novosel, Quanta Technology, USA 10:30AM MIGRATE: Massive Integration of Power Electronic Devices James Yu, Scottish Power Energy Networks, UK 10:55AM Opportunity and Challenge in China Power Grid with New Energy Resources Xianzhang Lei, Lijun Cai, Global Energy Interconnection Research Institute-Europe, Germany 11:20AM The Growing Need for Resilience in an Evolving Electric Grid Charles Hanley, Sandia National Lab, USA 11:45AM Panel Discussion: Resilient Electronic Power Grid 5

7 Tuesday, November 7, :10PM 2:10PM Lunch & E-Poster Chair(s): Madhav Manjrekar, University of North Carolina - Charlotte, USA 2:10PM 3:50PM DC Transmission Chair(s): Johan Enslin, Clemson University, USA 2:10PM System Impacts and Mitigation Options for Offshore Wind Farms Johan Enslin, Clemson University, USA 2:35PM PROMOTioN: Progress on Meshed Offshore HVDC Transmission Networks Cornelis Plet, DNV GL Energy, Netherlands 3:00PM Harmonic Resonance and Control Interoperability Analysis for HVDC Connected Wind Farms Mats Larsson, ABB Corporate Research, Switzerland 3:25PM Modular Multilevel Converter for Frequency Stabilization Martin Pieschel, SIEMENS AG Energy Management, Germany 3:50PM 4:10PM Coffee Break 4:10PM 5:50PM Wind Integration Chair(s): Xiongfei Wang, Aalborg University, Denmark 4:10PM Active Filtering Application to Optimize Windfarm Electrical Infrastructure and Meet Grid Code Requirements Lukasz Kocewiak, Ørsted (DONG Energy), Denmark 4:35PM Fast Frequency Control and Frequency Estimation A Wind Power Perspective Sönke Engelken, WRD Wobben Research and Development GmbH, Germany 5:00PM Grid Code for Wind Power Plant and its Compliance Assessment in China Weisheng Wang, China Electric Power Research Institute, China 5:25PMPanel Discussion: HVDC and Wind 6:30PM 10:00PM Dinner and Social 6

8 Wednesday, November 8, :00AM 9:40AM Executive Session III Chair(s): Frede Blaabjerg, Aalborg University, Denmark Don Tan, Northrop Grumman Corporation, USA 8:00AM Power Electronics as an Enabler for Grid Modernization Mark McGranaghan, Electric Power Research Institute, USA 8:25AM High Power Electronics Innovation Peter Steimer, ABB Corporate Research, Switzerland 8:50AM Power Electronics: Key Enabler to Solar Integration and Grid Reliability Guohui Yuan, Department of Energy, USA 9:15AM Panel Discussion: Power Electronics for Grid 9:40AM 10:00AM Coffee Break 10:00AM 11:40AM Emerging Technologies for Modern Grid Chair(s): Deepak Divan, Georgia Institute of Technology, USA Rik De Doncker, RWTH Aachen University, Germany 10:00AM Distributed Autonomous Control in the Future Grid Deepak Divan, Georgia Institute of Technology, USA 10:25AM The Smart Transformer: Impact on the Electric Grid and Technology Challenges Marco Liserre, Kiel University, Germany 10:50AM Wireless Power Transfer for Online Monitoring Systems in High-Voltage Transmission Networks Ron Hui, Chi Kwan Lee, University of Hong Kong, China 11:15AM Opportunities for Grid Energy Storage Babu Chalamala, Sandia National Lab, USA 11:40AM 1:40PM Lunch & E-Poster Chair(s): Xiongfei Wang, Aalborg University, Denmark 7

9 Wednesday, November 8, :40PM 3:20PM DC Networks Chair(s): Liuchen Chang, University of New Brunswick, Canada Marco Liserre, University of Kiel, Germany 1:40PM Control and Protection of Multi-terminal MVDC Distribution Grids Rik De Doncker, RWTH-Aachen University, Germany 2:05PM Development and Application of HVDC and MVDC Technology in China Qirong Jiang, Tsinghua University, China 2:30PM Role of HVDC and Power Electronics in the Future Smart Electric Grid Ram Adapa, Electric Power Research Institute, USA 2:55PM Intergrid: Future Electronic Power Systems Dushan Boroyevich, Virginia Tech, USA 3:20PM 3:30PM 3:30PM 3:50PM IEEE PELS Sustainable Energy Systems Technical Achievement Award Coffee Break 3:50PM 5:20PM Challenges for Grid Integration Chair(s): Qirong Jiang, Tsinghua University, China 3:50PM Integration of Offshore Grids via Long HVAC Cables: An Impact study for the Dutch Transmission System Konstantinos Velitsikakis, DNV GL, Netherlands 4:15PM Power Electronic Interfaced Power Sources Grid Code Compliance Challenges Slavomir Seman, Vestas, Denmark 4:40PM Current and Future Power Quality Challenges in Power Systems Christoph Buchhagen, TenneT TSO GmbH, Germany 5:05PM Panel Discussion: Future Grid Integration 5:20PM 6:30PM Inauguration of the VILLUM Investigator Grant - REPEPS 8

10 Wednesday, November 8, :20PM 6:30PM Inauguration of the VILLUM Investigator Grant - REPEPS 17:20 Welcome Frede Blaabjerg, Professor and VILLUM Investigator 17:25 VILLUM investigators and their importance for Aalborg University Per Michael Johansen, Rector, Aalborg University 17:35 What does it take to become a VILLUM Investigator and what to expect? Thomas Sinkjær, Director of Science, VILLUM FONDEN 17:45 REliable Power Electronic based Power System (REPEPS) Frede Blaabjerg, Professor and VILLUM Investigator 18:00 Informal reception 18:30 End of Day Thursday, November 9, :30AM 12:00PM Tutorial: The IEEE 1547 Standard for Interconnecting Distributed Energy Resources with Electric Power System Chase Sun, Principal Engineer, PG&E Grid Integration and Innovation. Venue: Fibigerstraede 16, room 1.101, Aalborg East, :00PM 12:30PM 12:30PM 5:00PM Lunch Technical tour GW Skagerrak Hybrid LCCand MMC-HVDC Station The bus for Technical Tour departures at the Parking Lot (Pon. 111, see map). Transportation between Musikken Hus /Hotels and Aalborg University Bus No. 12 and No. 2. 9

11 General Information Map of Hotels and Musikkens Hus Hotel Cabinn First Hotel CREATE AAU N Musikkens Hus Map of Tutorial and Technical Tour Parking Lot N Fib. 14 Pon. 111 Pon. 101 Pon. 103 Tutorial Canteen Pon. 109 Pon. 107 Pon. 105 No. 2 Bus Stop Parking Lot: Departure rally point for the technical tour Tutorial: Fibigerstraede(Fib.) 16, room

12 E-Poster Session Nov. 7, 2017, 12:10PM 2:10PM Chair(s): Madhav Manjrekar, University of North Carolina - Charlotte, USA 01 Alternative Power System Resources based on Distributed Energy Liuchen Chang, University of New Brunswick, Canada 02 Grid Friendly Power Conversion based on Virtual Synchronous Power Control Pedro Rodriguez, University Loyola Andalucía, Spain 03 Defending Against Low-Rate Flooding Attacks in Time-Critical Substation Communications Jia Di, Michael Mahler, Fengli Zhang, Qinghua Li, Alan Mantooth, University of Arkansas, USA 04 System-Level Impedance Analysis in DQ-Domain Atle Rygg, Marta Molinas, Eneko Unamuno Ruiz, Norwegian University of Science and Technology, Norway, Chen Zhang, Xu Cai, Shanghai Jiao Tong University, China 05 New Approaches for Relative Stability Assessment of Complex Power Systems described by Impedances/Admittances in the Frequency Domain F. D. Freijedo, U. Javaid, D. Dujic, Ecole Polytechnique Fédérale de Lausanne, Switzerland 06 Harmonic Current Analysis of the Active Front End System in the Presence of Grid Voltage Disturbance Bo Wen, The University of Manchester, UK, Paolo Mattavelli, University of Padova, Italy 07 Transient Stability Analysis of Power Converters with Different Active Power Control Schemes Heng Wu, Xiongfei Wang, Aalborg University, Denmark 08 Residential Photovoltaic Power Management Using Electric-Spring- Based Smart Loads Tianbo Yang, Kwan-Tat Mok, Chi-Kwan Lee, Siew-Chong Tan, S.Y. Ron Hui, University of Hong Kong, China 11

13 E-Poster Session 09 Stability and Protection of Vehicle-Grid Systems in High-speed Railway Zhigang Liu, Yicheng Liao, Southwest Jiaotong University, China 10 Decoupled Modeling and Control of the MMC Binbin Li, Zigao Xu, Dianguo Xu, Harbin Institute of Technology, Harbin, China 11 Study of Electromagnetic Disturbance Caused by Buck Converter on Controller Area Network Ryo Shirai, Toshihisa Shimizu, Tokyo Metropolitan University, Japan 12 Black-Box Modeling of PV Inverters for Roof Top Application for Harmonic Studies Sascha Müller, Jan Meyer, Peter Schegner, Technische Universitaet Dresden, Germany 13 Optimal Power Flow for an HVDC Overlay Grid Samuel Schilling, Maren Kuschke, Kai Strunz, Technical University of Berlin, Germany 14 Dynamic Modeling of the European Transmission Grid Integrating a High Share of Wind Power Simon Hellmuth, Maren Kuschke, Kai Strunz, Technical University of Berlin, Germany 15 Oscillation Frequency Analysis of DC Link Control in Voltage Source Converters Dapeng Lu, Xiongfei Wang, Frede Blaabjerg, Aalborg University, Denmark 16 The Integrated Role of Power Electronics and Control in the Electrification of the Ocean Space Abel A. Taffese, Atousa Elahidoost, Gilbert Bergna-Diaz, Elisabetta Tedeschi, Norwegian University of Science and Technology, Norway 17 Harmonic Stability and Resonance in Wind Power Plants: Modeling, Control, and Design Esmaeil Ebrahimzadeh, Frede Blaabjerg, Xiongfei Wang, Claus Leth Bak, Aalborg University, Denmark 12

14 E-Poster Session 18 Speeding up the Harmonic Stability Studies in Large Wind Power Plants Mohammad Kazem Bakhshizadeh, Jesper Hjerrild, Lukasz Kocewiak, Ørsted (DONG Energy Wind Power), Denmark, Frede Blaabjerg, Xiongfei Wang, Claus Leth Bak, Aalborg University, Denmark 19 A Control Method of Overvoltage Suppression across the DC Capacitor in a Grid-Connection Converter Using Leg ShortCircuit of Power MOSFETs during the Initial Charge Tomoyuki Mannen, Keiji Wada, Tokyo Metropolitan University, Japan 20 Operation and Control of Europe s First Bipolar MVDC link based on Neutral Point Clamped Converters: An ANGLE DC Perspective Tibin Joseph, Jun Liang, Cardiff University, UK, Andrew Moon, Kevin Smith, James Yu, Scottish Power Energy Networks, UK 21 The Influence of Parasitic Components and Non-ideal Characteristics in Practical Converters Shih-feng Chou, Xiongfei Wang, Frede Blaabjerg, Aalborg University, Denmark 22 Stable STATCOM Voltage Control Joachim Steinkohl, Xiongfei Wang, Aalborg University, Denmark 23 LTP model based High Frequency Interactions Analysis for DC Nano-grid Xiaolong Yue, Xiongfei Wang, Frede Blaabjerg, Aalborg University, Denmark, Dushan Boroyevich, Virginia Tech, USA 24 Implementation of Multiple-Input-Multiple-Output Identification Setup to Perform Real-Time Impedance-Based Stability Analysis of Grid- Connected Inverters Roni Luhtala, Tampere University of Technology, Finland 25 Converter Interoperability in Multi-vendor HVDC-VSC Systems O. Despouys, P. Rault, RTE, France, J. Freytes, Ecole Centrale Lille, France, D. Vozikis, University of Strathclyde, UK, T. Larsson, ABB, A. Burgos, REE Spain 13

15 E-Poster Session 26 Modeling of VSCs in Slave-Master-Controlled MTDC systems for Interaction Analysis in DC Voltage Control Timescale Wanning Zheng, Jiabing Hu, Huazhong University of Science and Technology, China 27 Enhanced External Equivalents of Active Distribution Systems for System Security Analysis Davood Raoofsheibani, Wolfram H. Wellssow, University of Kaiserslautern, Germany 28 Boundary Protection of HVDC Transmission Lines Based on Generalized S-transform Yanxia Zhang, Duoduo Li, Shuai Zhang, Huilan Jiang, Fang Zhang, Jinli Zhao, Tianjin University, China 29 Responsive Inertia on Remote Power Systems Jarren Lange,Willie Cronje, University of the Witwatersrand, South Africa 30 Control of Multi-Drive for Motor Applications under unbalanced Grid Yipeng Song, Pooya Davari, Frede Blaabjerg, Aalborg University, Denmark Nov. 8, 2017, 11:40AM 1:40PM Chair(s): Xiongfei Wang, Aalborg University, Denmark 31 Modular Multilevel Converter based STATCOM for Mitigation of Harmonics Martin Pieschel, SIEMENS AG, Germany 32 PV Module Integrated Converter for DC Microgrids: Design for High Efficiency and Power Quality Moustafa Adly, Kai Strunz, Technical University of Berlin, Germany 33 Effects Analysis of Digital Time Delay on Grid-Connected Large-Scale Centralized PV Plant Jinhong Liu, Marta Molinas, Norwegian University of Science and Technology, Norway 14

16 E-Poster Session 34 Subsynchronous Oscillation and Its Suppression of MMC-Based HVDC Connected Wind Farms Jing Lyu, Marta Molinas, Norwegian University of Science and Technology, Norway, Xu Cai, Shanghai Jiao Tong University, China 35 Custom Power Active Transformer for Improving Power Systems Regulation and Control Pedro Rodriguez, University Loyola Andalucía, Spain 36 Transformer Saturation in Grid Converter Systems Wei Liu, Xiongfei Wang, Frede Blaabjerg, Aalborg University, Denmark 37 Real-time Grid Simulation in a Power Hardware-in-the-loop Setup Tommi Reinikka, Henrik Alenius, Tampere University of Technology, Finland 38 Small-Signal Model of Output Impedance of Grid-Forming Inverter in DQ-Domain Matias Berg, Tuomas Messo, Teuvo Suntio, Tampere University of Technology, Finland 39 Achieving Inherent Damping for GCF Grid-connceted Inverter with LCL Filter in a Wide Range of Grid Impedance Chen Tong, Chi-Kwan Lee, The University of Hong Kong, China, S.Y. (Ron) Hui, Imperial College London, UK 40 Harmonic and Stability Assessment in Multiple Electric Trains and Network Interaction System Haitao Hu, Haidong Tao, Zhengyou He, Southwest Jiaotong University, China 41 Comparison of SST- and B2B-based Smart Transformer in distribution hybrid grids Rongwu Zhu, Xiang Gao, Marco Liserre, Christian-Albrecht-University of Kiel, Germany 42 CHB-QAB-Based Smart Transformer Levy Costa, Youngjong Ko, Andrii Chub, Marco Liserre, Christian-Albrecht- University of Kiel, Germany 15

17 E-Poster Session 43 Low Voltage Ride Through Peformance of a STATCOM based on Modular Multilevel Cascade Converters for Offshore Wind Application Takaaki Tanaka, Fuji Electric Co., Ltd, Japan, Huai Wang, Frede Blaabjerg, Aalborg University, Denmark, Ke Ma, Shanghai Jiao Tong University, China 44 Virtual Synchronous Generator Control of Power Electronic Converter for Supporting Flexible Operation of DGs Tianwen Zheng, Tsinghua University, China 45 Coordinated Optimization of DFIG Rotor Crowbar and DC-chopper Resistances Based on NSGA-2 Huilan Jiang, Tao Zhou, Chi Zhang, Jingwei Xue, Yanxia Zhang, Fang Zhang, Jinli Zhao, Tianjin University, China 46 Theoretical Analysis on the VSC Instability Caused by PLL in Weak System Baohong Li, Tianqi Liu, Sichuan University, China 47 Multi-Sampling Method for Single-Phase Grid-Connected Cascaded H-bridge Multilevel Inverters Junpeng Ma, Xiongfei Wang Frede Blaabjerg, Aalborg University, Denmark, Wensheng Song, Southwest Jiaotong University, China 48 Compensation of Time Delay in Electrical Drives Applications Mads Kjeldal Graungaard, Aalborg University, Denmark 49 Intelligent Self-driving and Underground-Monitoring System for Advancement Sooshin Park, Korea Electric Power Corporation, Korea 50 Battery Storages and Flexible Units to Minimise Grid Integration Issues of Distributed Generation Daniel Vázquez Pombo, Dominique Alonso Sørensen, Aalborg University, Denmark 51 Battery Storage Systems for Primary Frequency Regulation in Renewable Energy Dominated Power Systems Monika Sandelic, Ana Turk, Giancarlo Noto, Jayakrishnan Pillai & Sanjay Chaudhary, Aalborg University, Denmark 16

18 E-Poster Session 52 An Overview of HVDC Market and Future Outlook Saqib Saeed, Principal Analyst at Power Technology Research LLC, Germany 53 An Enhanced Feedforward Based LVRT Scheme for Grid Connected PV System Subham Sahoo, Sukumar Mishra, Indian Institute of Technology, Delhi, India, Adam Collin, Chris Dent, University of Edinburgh, UK, Jianzhong Wu, Cardiff University, UK 54 Enhancing Lifetime of OLTC in PV Enriched Network Anubrata Das, Saurav Roy Choudhuri, Sandeep Anand, Indian Institute of Technology Kanpur, India 55 Maximum Efficiency Tracking with Simultaneous Frequency Optimizing and Impedance Matching for Dynamic Wireless Charging in Electric Vehicles Amir Babaki, Sadegh Vaez-Zadeh, University of Tehran, Iran 56 Performance Study of Microgrid with Multiple Distributed Generation Systems Shreeram V Kulkarni, Dattatraya N Gaonkar, National Institute of Technology Karnataka Surathkal, India 57 Decentralized Frequency Droop based Power Sharing Control in DC Grids Saeed Peyghami, Hossein Mokhtari, Frede Blaabjerg, Aalborg University, Denmark 58 Model Predictive Control in AC Microgrids Jacob Bitsch Nørgaard, Tomislav Dragicevic, Frede Blaabjerg, Aalborg University, Denmark 59 Remote Power System Dynamics with Decentralized Droop Control Jarren Lange, Willie Cronje, University of the Witwatersrand, South Africa 60 Redesign Method of Distributed Inverters Using Global Synchronous Pulse Width Modulation Tao Xu, and Feng Gao, Shandong University, China 17

19 Organizing Committee General Chair Frede Blaabjerg, Aalborg University, Denmark Steering Committee Don Tan (Chair), IEEE Division II Director Damir Novosel (Co-Chair), IEEE PES President Alan Mantooth, IEEE PELS President Liuchen Chang, IEEE PELS Vice President Mark McGranaghan, EPRI Vice President Johan Enslin, Clemson University, USA Mario Pacas, University of Siegen, Germany Dushan Boroyevich, Virginia Tech, USA Deepak Divan, Georgia Institute of Technology, USA Jian Sun, Rensselaer Polytechnic Institute, USA Zhengming Zhao, Tsinghua University, China Jinjun Liu, Xi an Jiaotong University, China Technical Program Chair Xiongfei Wang, Aalborg University, Denmark Technical Program Committee Madhav Manjrekar, University of North Carolina, Charlotte, USA Yue Zhao, University of Arkansas, USA Xiaonan Lu, Argonne National Lab, USA Jiabing Hu, Huazhong University of Science and Technology, China Meiqin Mao, Hefei University of Technology, China Shimizu Toshihisa, Tokyo Metropolitan University, Japan Tsai-Fu Wu, National Tsinghua University, Taiwan Dongsheng Yang, Aalborg University, Denmark Yipeng Song, Aalborg University, Denmark Xiaolong Yue, Aalborg University, Denmark Heng Wu, Aalborg University, Denmark Wei Liu, Aalborg University, Denmark Local Organizing Committee Maria Hald Friis, Aalborg University, Denmark Hanne Munk Madsen, Aalborg University, Denmark Finance Ann Louise Henriksen, Aalborg University, Denmark 18

20 City Information General Information Aalborg is a multi-faceted city full of contrasts. It is also grand on a manageable scale. All the major city attractions are concentrated within easy distance. From fast-paced fun to peaceful oases. From a foaming draft beer to sublime gastronomy. From the Viking Era to the Middle Ages, to modern art. The city s recently restored waterfront has much to offer for the outdoor and curious visitor. With its many open-air sports and recreational areas, the waterfront invites both active guests and those with lust for life. Near the waterfront you will find both the new Nordkraft and the architectural astonishing Utzon Center. Local Transportation 1) Aalborg Airport to Hotel and House of Music (Bus and Taxi) BUS: Take the bus no. 12 from the Aalborg Airport and get off in the Nytorv, and walk about 8 minutes. TAXI: costs DKK. 2) Train Station to Hotel and House of Music (Bus and Walk) BUS: Take the bus no. 14 from the Aalborg Busterminal and get off in the Medborgerhuset, and walk in 2 minutes. Walk: 14 minutes. 3) House of Music and Hotel to Aalborg University (Bus and Taxi) BUS: Take bus no. 2 from the Politigården and get off in the AAU Kantinen, and then walk in 2 minutes. TAXI: costs DKK. 19

21 General Information Venue for Workshop - House of Music (Musikkens Hus) The Musikkens Hus is located on the waterfront of Aalborg and with a panoramic view of the Limfjorden, you will find Musikkens Hus the future musical gathering point of Northern Denmark and an architectural gem, designed by the internationally acknowledged architectural firm Coop Himmelb(l)au. Social Event and Dinner Dinner will be served in the Musikkens Hus at 6:30 pm on November 7, and it will be a wonderful opportunity for networking. Weather in Aalborg The temperature next week in Aalborg will be 4/9 C, and a strong wind could be common during this time of the year. However, you can still expect to see some sunny and blue sky and enjoy the beautiful scenes along the Limfjorden our waterfront where the conference will be held. Methods of Payment Danish currency is kroner (DKK), EUR 1 is equivalent to DKK 7.5 and USD 1 is equivalent to DKK 6. Banks are open from 10.00AM-04.00PM Monday to Friday. Though, in most hotels, restaurants, cafés and shops international credit cards are widely accepted. Emergency & Medical Care In case of emergency please dial to contact ambulance, police, or fire department. In case of serious illness or injury dial Hotel staff can also direct you to hospitals or dental clinics. For non-emergency sickness the medical authorities recommend consulting a doctor instead of going to the hospital. Your hotel will be able to recommend you one. 20