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

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

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

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

    3. 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. 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. 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. 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. 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. 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. 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. 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. 11

    12. 12 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.

    13. 13 National Grid Structure

    14. 14 Operating criteria

    15. 15 Equipment and automation

    16. 16 Load types and characteristics

    17. 17 LV network classification

    18. 18 Possible networks for the DISPOWER goals: 7

    19. 19 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

    20. 20 CESI test site

    21. 21

    22. 22

    23. 23 Electrolyte tanks

    24. 24

    25. 25

    26. 26 Landkarte/ bei Dannenberg, ElbeLandkarte/ bei Dannenberg, Elbe

    27. 27

    28. 28 End

    29. 29 Radial 1 and radial 2 LV Network in radial configuration: radial 1 (rural ) radial 2 (urban)

    30. 30 Link 1 and 2 LV Network in link configuration: Link 1 (rural ) Link 2 (urban)

    31. 31 Ring 1 and 2 LV Network in ring configuration: ring 1 (rural ) ring 2 (urban)

    32. 32 Mesheable configuration

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