ELMO: An Interoperability Ontology for the Electricity Market


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Title: ELMO: An Interoperability Ontology for the Electricity Market
@ International Conference on e-Business

Milan, Italy


Creator: Panos Alexopoulos (Knowledge Engineer – Researcher)

Published in: Technology, Economy & Finance
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ELMO: An Interoperability Ontology for the Electricity Market

  1. 1. ELMO: An Interoperability Ontology for the Electricity Market Panos Alexopoulos Knowledge Engineer - Researcher International Conference on e-Business July 9 th 2009 Milan, Italy
  2. 2. Presentation Contents <ul><li>Liberalization of Electricity Market & Interoperability </li></ul><ul><li>Semantic Interoperability & Ontologies </li></ul><ul><li>The ELMO Ontology </li></ul><ul><ul><li>Structure </li></ul></ul><ul><ul><li>Content </li></ul></ul><ul><li>ELMO Application </li></ul><ul><li>Conclusions & Future Work </li></ul>
  3. 3. Liberalization of Electricity Market <ul><li>The liberalization of the Electricity Market in the EU aims at creating an electricity market in which: </li></ul><ul><ul><li>Resources will be efficiently used. </li></ul></ul><ul><ul><li>Free competition will guarantee reasonable electricity prices. </li></ul></ul><ul><li>The successful operation of the market requires the effective interaction between the market participants. </li></ul><ul><li>Such an interaction is primarily a matter of interoperability. </li></ul>
  4. 4. Liberalization of Electricity Market & Interoperability <ul><li>Interoperability among two parties is achieved when the meaning of exchanged information is understood by both parties at the same way. </li></ul><ul><li>At human and organizational level, this is achieved through the adoption of common terminology and interaction processes. </li></ul><ul><li>In our case, organizational interoperability is ensured through a European Market Operational Framework that all member countries are supposed to implement. </li></ul><ul><li>At information systems level, however, semantic interoperability is required. </li></ul>
  5. 5. Semantic Interoperability & Ontologies <ul><li>Semantic interoperability is achieved when the meaning of exchanged information is understood by software applications and services. </li></ul><ul><li>For that to happen, the information must be represented in a format that conveys its meaning in an unambiguous and machine interpretable way. </li></ul><ul><li>To that end, ontologies can play a vital role. </li></ul>
  6. 6. Semantic Interoperability & Ontologies <ul><li>An ontology is a formal shared conceptual model that represents the meaning of a domain’s terms through </li></ul><ul><ul><li>high-level abstract concepts. </li></ul></ul><ul><ul><li>semantic relations between these concepts. </li></ul></ul><ul><li>As such, it is a way of dealing with ambiguity and heterogeneity. </li></ul><ul><li>Formality, allows for machine interpretability of the domain’s semantics. </li></ul>
  7. 7. The ELMO Ontology <ul><li>The Electricity Market Ontology (ELMO) is a model that provides a shared, common understanding of concepts and procedures regarding the operation of the electricity market. </li></ul><ul><li>It was developed initially for the electricity market of Greece with the help of both national and international electricity market experts. </li></ul><ul><li>Nevertheless, it may act as the basis for the development of similar ontologies for the markets of the other EU countries as: </li></ul><ul><ul><li>It fully conforms to the corresponding EU framework. </li></ul></ul><ul><ul><li>Its structure and content are easily adaptable and extendible. </li></ul></ul>
  8. 8. ELMO Structure <ul><li>Layered Architecture: </li></ul><ul><ul><li>Maintainability </li></ul></ul><ul><ul><li>Extendibility </li></ul></ul><ul><ul><li>Reusability </li></ul></ul>
  9. 9. Layering Criteria <ul><li>The basic layering criterion was the geographical applicability range of the domain’s knowledge. </li></ul><ul><li>Some knowledge was valid only for the Greek Market while other for the whole EU. </li></ul><ul><li>Separating these two ensured: </li></ul><ul><ul><li>Easier ontology maintenance. </li></ul></ul><ul><ul><li>Ability to use the EU-specific layer as an upper ontology for the development of market ontologies for other EU countries. </li></ul></ul><ul><ul><li>Easier mapping between the ELMO ontology and other existing country-specific market ontologies. </li></ul></ul>
  10. 10. Generic Market Independent Layer <ul><li>Has the role of an Upper Ontology, namely an ontology that covers generic and domain-independent concepts. </li></ul><ul><li>Normally based on the adaptation or reuse of existing foundational ontologies such as DOLCE or SUMO. </li></ul><ul><li>Not implemented yet due to time and resource limitations. </li></ul>
  11. 11. Generic Market Specific Layer <ul><li>Defines the more abstract market-related concepts and relations of the ontology. </li></ul><ul><li>These are made more concrete in the lower level layers through specialization and instantiation. </li></ul><ul><li>Comprises eleven concepts which are interrelated through ten relations. </li></ul>
  12. 12. Generic Market Specific Layer
  13. 13. International Market Specific Layer <ul><li>Supposed to contain market-related knowledge that is valid and applicable for all the electricity markets of the world. </li></ul><ul><li>Currently there is no formal activity towards a common international electricity market. </li></ul><ul><li>That makes the task of extracting internationally applicable knowledge quite difficult. </li></ul><ul><li>Therefore, the ELMO ontology does not currently implement this layer but includes it in its architecture so that it can implement it in the future. </li></ul>
  14. 14. EU and Greek Market Specific Layers <ul><li>Richest layers in terms of content </li></ul><ul><ul><li>~2000 concepts. </li></ul></ul><ul><ul><li>~700 asserted instantiated relations. </li></ul></ul><ul><ul><li>~7000 inferred relations. </li></ul></ul><ul><li>Layer content defined as instances or specializations of the generic layer’s components. </li></ul><ul><li>Distinction between EU-specific and Greece-specific knowledge was performed on the basis of the knowledge contained in the Greek and EU legislation. </li></ul><ul><li>Separation task is still ongoing. </li></ul>
  15. 15. Example Content – Participants & Processes <ul><li>Producer </li></ul><ul><ul><li>Dispatchable Unit Producer </li></ul></ul><ul><ul><li>Contracted Unit Producer </li></ul></ul><ul><ul><li>Cold Reserve Unit Producer </li></ul></ul><ul><ul><li>New Generation Unit Producer </li></ul></ul><ul><ul><li>Auto Producer </li></ul></ul><ul><li>Load Representative </li></ul><ul><li>Meter Representative </li></ul><ul><li>Transmission System Operator </li></ul><ul><li>Production License Holder </li></ul><ul><ul><li>Production License Holder of Contracted Hydro Unit </li></ul></ul><ul><ul><li>Production License Holder of Black Start Unit </li></ul></ul><ul><li>Registration with the ENERGY TRANSACTIONS SYSTEM </li></ul><ul><ul><li>Registration with the Participant Register </li></ul></ul><ul><ul><li>Conclusion of Energy Transactions Contract </li></ul></ul><ul><li>Daily Ahead Scheduling </li></ul><ul><ul><li>Submission of Load Declarations </li></ul></ul><ul><ul><li>Energy Offer Submission </li></ul></ul><ul><li>Dispatch Procedure </li></ul><ul><ul><li>Dispatch Schedule preparation </li></ul></ul><ul><ul><li>Issue of Dispatch Instructions </li></ul></ul>
  16. 16. Applying ELMO <ul><li>ELMO is currently utilized within the Hellenic Transmission System Operator (HTSO) as a vital component of the organization’s electronic library. </li></ul><ul><li>The library contains documents regarding the Electricity Market. </li></ul><ul><li>ELMO is used within the library for: </li></ul><ul><ul><li>Semantic annotation of library’s content. </li></ul></ul><ul><ul><li>Facilitation of semantic search and navigation services. </li></ul></ul><ul><li>System deployed and running at http://emarketinfo.desmie.gr/htso/user </li></ul>
  17. 17. HTSO Electronic Library
  18. 18. Summary & Conclusions <ul><li>ELMO is a highly reusable and adaptable ontology that provides a shared, common understanding of concepts and procedures regarding the operation of the electricity market. </li></ul><ul><li>As such it may act as: </li></ul><ul><ul><li>The backbone of any knowledge repository that needs to store market relevant knowledge. </li></ul></ul><ul><ul><li>A comprehensive starting point for developing specialized market ontologies and corresponding ontology-based applications that serve market specific tasks. </li></ul></ul><ul><ul><li>An ontological framework based on which market related information systems could semantically interoperate with each other. </li></ul></ul>
  19. 19. Future Work <ul><li>Future work involves: </li></ul><ul><ul><li>Continuing the separation between EU specific and Greek specific market knowledge. </li></ul></ul><ul><ul><li>Examining the suitability and applicability of several foundational ontologies for our Generic Market Independent Layer. </li></ul></ul><ul><ul><li>Investigating a number of application-specific enhancements to the ontology in order to make it directly usable to several market related applications. </li></ul></ul>
  20. 20. Questions?? <ul><li>Thank you… </li></ul>Panos Alexopoulos Knowledge Engineer – Researcher IMC Technologies SA Marathonos 2 & Kifisias 360Α, 15233, Chalandri T :  +30 210 6927 378 F : +30 210 6926 813 E :   palexopoulos@imc.com.gr W : www.imc.com.gr