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Work package descriptions

ELECTRICAL ENERGY DISTRIBUTION NETWORKS: ACTUAL SITUATION AND PERSPECTIVES FOR DISTRIBUTED GENERATION. DISPOWER : Distributed Generation with high penetration of renewable energy sources project n° NNE5-2001-00075. Work package descriptions. WP 1: Grid stability and control

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Work package descriptions

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  1. ELECTRICAL ENERGY DISTRIBUTION NETWORKS: ACTUAL SITUATION AND PERSPECTIVES FOR DISTRIBUTED GENERATION

  2. DISPOWER:Distributed Generation with high penetration of renewable energy sources project n° NNE5-2001-00075

  3. Work package descriptions • WP 1: Grid stability and control • WP 2: Power quality and safety • WP 3: Socio-economic issues • WP 4: Planning, training and operation tools for regional supply systems • WP 5: Information, communication and electricity trading • WP 6: Test facilities for grid stability and control • WP 7: Implementation of RE technology for regional supply systems • WP 8: Test facilities for power quality in DG grids • WP 9: Operation and quality management tools in low voltage grids • WP 10: Pilot installations and monitoring of distributed power generators in low voltage grids • WP 11:Overall assessment of DG in local power supply systems

  4. Work Package 1 & 2 • Work Package 1 (Grid stability and control) is intended to develop equipment and system models capable of ensuring effective and economical operation of electrical networks with high penetration of distributed renewable energy sources. • Work Package 2 (Power quality and safety) will identify new standard requirements for grid connection of decentralized power generators with particular attention to islanding operation problems and the development of innovative protection methodologies and systems.

  5. Work Package 3 & 4 & 5 • Work Package 3 (Socio-economic issues) is oriented to evaluate the influence of new communication technologies and distributed networks on the development of supply, consumption and distribution of electricity. • Work Package 4 (Planning, training and operational tools for regional supply systems) aims at adapting existing tools for planning, design, operation of distributed generation systems. • Work Package 5 (Information, communication and electricity trading) will develop an internet-based information network for fast and secure data exchange and management.

  6. Work Package 6 & 7 • Work Package 6 (Test facilities for stability and control) The new concepts developed in the previous work packages need to be tested in the partners’ laboratories. Test sites will include distributed generators and communication facilities. • Work Package 7 (Implementation of renewable energy technology for regional supply systems) will elaborate scenarios of long term perspectives for distributed generation in Europe. Both interconnected grids and weak and/or isolated networks will be considered.

  7. Work Package 8 & 9 • Work Package 8 (Test facilities for power quality in DG grids) will realize a flexible low voltage grid structure. The scope is to evaluate different scenarios for the implementation of distributed energy sources and energy storage devices. A test facility with over 200 kW of installed power is already under development at CESI (Milano, Italy). • Work Package 9 (Operation and quality management tools in low voltage grids) will develop a “Power Operation and Power Quality management system” which will be used to control energy flows and power quality in low voltage grids with concepts allowing for use of low cost equipment.

  8. Work Package 10 & 11 • Work Package 10 (Pilot installations and monitoring of distributed power generators in low voltage grids) Experimental sites will be realized for the testing of distributed generators at low voltage level. Actually installed pilot sites are expected to be used at MVV (Dannenberg, Germany), at Iberdrola (San Agustin del Guadalix, Spain), at Stadtwerke (Karlsruhe, Germany). • Work Package 11 (Overall assessment of DG in local supply systems) will coordinate the presentation and dissemination of results through publications and workshops.

  9. Power Quality Operation and Management system:POMS • PoMS is a communication infrastructure and optimisation tool for low voltage grids which is expected to perform power quality monitoring and control and to optimize grid operation through distributed generation control and demand side load management • A PoMS system implementation consists of a central PoMS unit and a communication infrastructure, which connects DG and measurement units to PoMS.

  10. Power Quality Operation and Management system:POMS • collect information about topology situation and power quality • provide local strategies for power quality and security improvement; • generates schedules for economically (cost) and technically (power quality) optimised operation of controllable generators and loads;

  11. National Grid Structures • Within the first activities of WP 2 and WP 9 in DISPOWER, an overview of different network structures (Italy, Spain, UK, Germany, Poland) and a preliminary classification has been performed. • The aim is to find solutions and concepts that can be applied easily to a certain class of systems. • Thus, a detailed description of the Low Voltage grids has been started by collecting the following information/ parameters.

  12. National Grid Structure

  13. Operating criteria

  14. Equipment and automation

  15. Load types and characteristics

  16. Radial operation Ring operation Link operation Meshed operation 1 transformers X X 2 transformers X X X =>3 transformers X X X X LV network classification

  17. Possible networks for the DISPOWER goals: 7

  18. Test sites • Within DISPOWER, four test sites will be set up in order to evaluate the performances of active networks and the POMS strategies. • A test Facility will be installed at CESI, Milan • MVV Energie AG will build up a solar settlement at the location “Querdeich”, Dannenberg, Germany • The IBERDROLA Technology Demonstration Centre (TDC) near Madrid • As a fourth test site, Stadtwerke Karlsruhe Germany, SWK

  19. CESI test site

  20.     Test facility: structure The topology grid and distributed resources configuration can be changed using control command to the transfer switches interconnection board. DISH STIRLING Hybrid PV system MCFC+ T T 1 T 2 PEM REDOX FLY WHEEL VARIABLE LOAD LOADS FIELD Der. 1 Der. 2 Der. 3 BIOMASS VARIABLE LOAD PoMS Meters LOAD BUS-BAR Synchronism unit BUS-BAR 2 BUS-BAR 1 LV Transfer switches board TELE-CONTROLLED SWITCHES + INTERFACE PROTECTIONS 800 kVA 800 kVA

  21. Test facility: Solar Dish Stirling (1) CESI Eurodish: European Dish Stirling solar generator system (3rd prototype in the world) based on the SOLO 161 Stirling motor parabolic concentrator, 8.5 m diameter, 56 m² 2000 suns, temperature 800°C Two axis tracking: azimuth & elevation 10 kWe 400 Vac 3 phase Asynchronous alternator grid connected

  22. Test facility: Vanadium Redox Battery (1) Electrolyte tanks 42 kW 84 kWh Stack Nominal Voltage 125 V Maximum Current 500 A Operative Voltage 100 ÷ 155 V Number of cells 100 Manufacturer SUMITOMO

  23. CESI Test facility: Wireless communication Wireless bridge AIRONET from Cisco: up to 20 km with special antenna, data connection speed from 1 to 11 Mb/s. Protocol is IEEE 802.11 (named Wi-Fi) Units must be provided with PCMCIA or PCI cards Already used to interface PV hybrid system and Solar Dish Stirling with their remote control sites. antenna

  24. Foto: Pohlmann & Partner Pilot Installation MVV: Solar Settlement Querdeich 6.64 kWp thin film PV system First office building inaugurated in July 2002 Integrated energy concept: Biomass district heating & distributed generation Goals of pilot installation: • Demonstrate high (premium) power quality in LV grids with high penetration of decentralised generation • Develop measuring concepts for pilot installations, having future massive distributed generation in mind • Demonstrate remote monitoring and control of representative pilot installation sites

  25. Pilot Installation MVV: Current Concept • LV grid: - 400 kVA-Transformer station: 20/0,4kV- open-ring/ closed ring operation • Loads:- private houses - office building - assisted living- nursing home • DG-Generators: - PV-Generator: 121kWp- CHP (BHKW): approx. 50kW- Battery storage: 50kW/20min. • PQ Monitoring: - SimeasQ (Siemens) or Mavolog (GM)- Topas 1000 (LEM) Source: Architektenbüro Pohlmann

  26. PQ - Recorder Electricity meter DC/AC Inverter PQ kWh PQ PQ PQ PQ MVV Pilot Installation: Configuration Design 18 x 5 kWp PV Combined Heat and Power Unit 50 kW CHP PV 120 kWp kWh kWh kWh Transformer: 400kVA; 20 / 0,4 kV (optional) Distributionbox kWh kWh Central energy and power quality management: PoMS Battery Storage 50 kW/20min. 30 kWp PV Communication

  27. End Thank you for your attention

  28. Radial 1 and radial 2 • LV Network in radial configuration: • radial 1 (rural ) • radial 2 (urban)

  29. Link 1 and 2 • LV Network in link configuration: • Link 1 (rural ) • Link 2 (urban)

  30. Ring 1 and 2 • LV Network in ring configuration: • ring 1 (rural ) • ring 2 (urban)

  31. Mesheable configuration

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