RT.2a : Voltage quality monitoring, dip classification and responsibility sharing
Convener :
Jorge Esteves, ERSE - Portuguese Energy Services Regulatory Authority; Portugal
Scope :
The European energy regulators (CEER) and the association of the electricity industry in Europe (EURELECTRIC) have for some years a cooperative work in the field of quality of electricity supply, involving joint meetings and the participation of regulators at the dedicated CENELEC Technical Committee. A major Workshop on "Voltage Quality Monitoring" was organised jointly by the two organisations during November 2009, in Brussels, involving more than 80 participants and achieving very important conclusions about the importance of this topic.
In parallel, one of the changes agreed at CENELEC level for the EN 50160 standard revision is a comprehensive and effective treatment of voltage dips classification, including reference to standards (e.g. EN 61000-4-11) for testing of equipment against voltage disturbances and to the electromagnetic environment classes defined by the EN 61000-2-4. This reference can be seen as an important pre-condition to responsibility sharing between the stakeholders, as follows:
• good voltage quality at the customer's bus is the network operator responsibility;
• good quality for load current drawn from the bus is the customer's responsibility;
• developing and supplying equipment with adequate tolerance to power quality and cost-effective power conditioning devices with appropriate technology are the manufacturers' responsibility;
• ensuring an efficient balance of these responsibilities is the role of the National Regulatory Authorities.
The implementation of a standardised voltage dips classification, the monitoring, the collecting and publicising of reliable data about the real situation in each European country, will allow an understanding and benchmarking of the real situation together with the impacts for networks and customers.
This CIRED 2011 round table, jointly organised by CEER and EURELECTRIC, envisages emphasising the importance of these advances and to widespread the good practices already in place.
Panelists :
- Karstein Brekke, CEER Electricity Quality of Supply and Smart Grids TF;
NVE - Norwegian Water Resources and Energy Directorate , Norway
- Kevin Niall, EURELECTRIC Standardisation Group; Manager, Network Strategy, ESB Networks, Ireland
- Maurizio Delfanti, CENELEC TC 8X/WG1 Secretary;Energy Dept., Politecnico di Milano, Italy
- Math Bollen, EI - Swedish Energy Markets Inspectorate, Sweden
RT.2b : Economic framework of power quality
Convener :
Jose Luis Gutierrez Iglesias, UNESA, Spanish Electricity Industry Association, Spain
Scope :
Improving power quality in electrical systems can result in significant savings and can be a competitive advantage. It is important for customers and suppliers to work together in identifying the best alternative for achieving required level of performance.
Various independent studies have been undertaken by power companies, consultants, regulators, and research organizations to estimate the cost of power quality problems to the power companies and their customers
Deregulation and industry restructuring are placing utilities under increasing pressure to both improve customer reliability and decrease cost.
Investment and economic losses depend on numerous parameters, and this is itself an ambiguity and complexity factor in comparison issues regarding power quality improvement projects. Calculation of financial damages related to system quality problems widely various from customers and facility managers prospective.
Topics:
Economic impact of voltage dips and short interruptions (Jovica Milanovic)
Methodology to quantifying impact of harmonics (Paola Verde)
Cost associated with PQ networks (Jose M. Romero Gordon)
Collecting PQ economic data (Roman Targosz)
Economic assessment of PQ solution (Helge Seljeseth)
Panelists :
Jovica Milanovic, University of Manchester, UK
Jose M. Romero Gordon, ENDESA, Spain
Paola Verde, Universita di Cassino, Italy
Roman Targosz, PCPM, Poland
Helge Seljeseth, SINTEF, Norway
RT.2c : EMF - Revision of magnetic fields limits
Convener : Herwig Renner, Technische Universität Graz, Austria
Scope :
After several months ICNIRP finalized in summer 2010 new guidelines for limiting EMF exposure which were finally published in late autumn. Compared to existing guidelines, published in 1998 especially in respect to harmonics the new guidelines are less conservative. Based on new results from exposure simulation using FEM the reference value for the magnetic flux density (general public, 50 Hz) now increased to 200 µT instead of 100 µT given by guidelines 1998.
• ICNIRP 10 - changes & consequences for grid operators and industry
• Protection of employees: Directive 2004/40/EC
• ELF EMF Standardization (CENELEC, IEC) - ongoing work; lack of knowledge
• Practice of assessment in case of non-sinusoidal exposure - are instruments ready for given requirements?
Panelists :
Andreas Abart, Energie AG Netz GmbH, Austria
Francois Deschamps, RTE, France
Martti Hyvönen, Helsingin Energia, Finland
Dr. Ernst Schmautzer, Graz University of Technology, Austria |
