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CIRED 2003 - Distribution facing new challenges The applied research issues in relation with CIRED-Topics Dr.-Ing. Adolf Schweer, DE Chairman of CIRED Technical Committee CIRED 2003 620 Papers suggested; 450 Papers accepted Session 1: Network components A. Doulet F / S. Theoleyre F Session 2: Power quality and EMC A. Robert BE / E. de Jaeger and J. Hoeffelmann BE Session 3: Operation, network control and protection K. Bielenberg DE / Th. Connor DE Session 4: Distributed generation, management and utilization of electricity T. Headley UK / A. Cross UK Session 5: System development A. Arcos ES / J. Correra ES Session 6: Management-organization- skills G. Kliffen NL, K.B. Mortensen NOR RWE Net© RWE Session 1: Network components: 96 papers Liberalisation and regulators influences: cost and quality pressure New features of components offer possibilities of network development or cost-savings improvements of power quality: • • • • • Maintenance-free - RMU, (Circuit breaker and protection instead of fuses) Condition based maintenance (CBM), reliability centered maintenance (RCM), Riskmanagement (Circuit Breakers, Transformers,) cost reduction comp. S. 5 Electronical Equipent for switching, LC-Resonant circuits, Thyristor switched Capacitor equipment, super conducting fault limiter, electronical fault current limiter Overhead lines: covered conductors, live line working and tools to reduce the costs of maintenance and outages cables: Improvement of backfillers, increased current capacity, improved insulation materials, cost reduction, improved joints to reduce outages 2 RWE Net© RWE Session 2: Power quality and EMC: 82 papers • EMI: emmissions from broad band Power Line Carrier (PLC): influence on the emissions, definitions of emmission limits • Lightning, ground potential rise and neutral grounding • resonant grounding low impedance grounding Harmonics are basically produced by distorting loads (non linear loads) in all voltage levels: TV-Sets, computers, compact fluorescent lamps etc. 20% of french networks do not comply with EN 50160, as in most other European countries 3 RWE Net© RWE Possible fields of further research: • measurement programmes, limiting the emission from electronical devices • Use of inverter based generators (e.g. from dispersed generation) • Influence on the grid side by central harmonic compensation Power quality measurement methods • • • Measurement and characterization of voltage dips and short interuptions, Flicker Immunity levels, remedial measures Practices of counting voltage dips and short interuptions Power quality in the competitive market • Power quality belongs to one of the main purposes • • • Benchmarking of costs and power quality (utilities and regulators ) Obtaining and analysing reliability data, limitation of the effort the data customer relationsships in different regulation systems RWE Net© RWE 4 Session 3: Operation, Control and protection: 73 Papers Neutral earthing methods (earth fault protection, regarding outage time) Fault detection (improvement of organization in case of grid faults, information exchange with mobile personel) Automation (improvement of procedures to reduce customer interuption minutes) Loss reduction and voltage control Network control Improved technology offers reduced number of control centers (cost reduction); SCADA on web; integrated GIS/SCADA/DMS; furter development of SCADA systems, standardization within IEC Integration between control center and power quality information, call center..... Communication between all IT-Systems (comp. Session 5 and 6) Protection: 26 papers: New features to improve fault location, reduce outages, interoperability betwen new and legacy products, reduction of the number of parameters; standardization 5 RWE Net© RWE Session 4: Distributed generation, management and utilisation of electricity: 88 Papers Energy efficiency, storage, demand and metering Dispersed Generation (DG) National legislation, additional fees for DG leads to a big increase of DG, mainly Wind energy and Photovoltaic; goals of 10-20% are reported a lot of additional problems are reported, which have to be studied: power quality, voltage increase and voltage regulation, operation and planning problems, forcast of customer load and renewable generation, harmonics, flicker Standards and generator issues CEN-workshop agreement IEEE P-1547 Standard different national approaches Are the regulations and connection standards consisting across countries, are they leading to reduced costs? 6 RWE Net© RWE Research objectives due to increase of DG: fault levels, voltage control, new design of voltage controllers, fault current protection power quality effects (positive or negative) from Windenergy or Photovoltaik generators Operation, control and stability issues New generators, new protection relays carrier signal base protection, e.g. with PLC Planning of Grids with increasing portion of DG: Development of adequate Tools, capacity of the networks and voltage levels under normal and faulty conditions Planning of MV, HV and EHV - network due to the increasing number of each: single generators, small windparks up to offshore windparks with thousands of Megawatts Energy management systems, Forcast of customer load and renewable generation 7 RWE Net© RWE Session 5: System Development: 62 papers Asset management and maintenance strategies Reliability centered maintenance (RCM), ranking of the importance of components on their influence on the reliability, instead of routine maintenance Asset management: The source of the revenues are to be managed in the most efficient way: decisions about maintenance, replacement; systematisation and centralisation to allow asset owners to take accurate decisions, concerning the supply task inclusive the quality and regulative impacts Reductions of investment levels of up to 40% are reported Healthy indices of components, ranking of importance, evaluation of conditions of equipment, use of portable data terminals or portable computers Network development: rural networks, losses management, reliability improvement, probabilistic risk analysis 8 RWE Net© RWE Deregulation impact and Benchmarking The Impact of different regulators in different countries: Benchmarking between similar structures: reference networks, improvement of efficiency and quality of service, losses in distribution network Development of models regarding the revenues in distribution networks Continuity of service as a continous target, or limits for target values? Efficieny benchmarking method in Finish distribution utilities, Norway, UK? Methods and tools GIS - Systems, connection to SCADA and DMS, Effort for effective GIS-Systems GIS-Connection to load flow, network analysis package Losses calculation, network optimization , reliability calculation for planning Joint planning of Gas and Electricity networks with common Tool: reduced costs 9 RWE Net© RWE Session 6: Management - organisation - skills: 69 papers Changes due to Liberalisation/regulation Remumeration process: calculation of revenues? Research and development of standards? Benchmarking: possibilities and limits: different regulatory influences in the countries Incentive regulation, price cap methodologies, yardstick regulation? Reporting of incidents on quality of service: search for the right indices Restructuration of companies: The Distribution community in a rapid change Standardization to reduce costs: components, of processes, operation of the callcenter in combination with control centres, connection rules to the grid.... Outsourcing of activities Impact of deregulation on the safety of personel New tools development of management systems, control center, call centers...; direct communication with mobile personel, mobile learning in the field, mobile solutions It- Strategy; Metering and accounting systems following rules of liberalization 10 RWE Net© RWE