Inverter interconnection tests performed in the LABEIN-Tecnalia microgrid involved in the DERlab round-robin testing activity

One of the key objectives of DERlab Network of Excellence is the development of internationally acceptable test and certification procedures for Distributed Energy Resources (DER)-components and systems connection and operation, which could be proposed to European standardisation bodies. Interconnection of inverters to the electrical grid has been identified as a key issue for the wide integration of DER, especially when international standards scenario is highly unclear. As a prenormative research, a round-robin test of two small scale photovoltaic inverters has been performed by nine DERlab laboratories during the period of January - July 2009. The test activity was focused on the verification of individual test procedures, common interpretation of standards and requirements, and determination of problems related to the equipment and facilities involved in conducting round-robin tests. Compilation of test results and first conclusions of this activity will be available during this year. As part of the intercomparison campaign, this paper is focused on the round-robin tests carried out in the microgrid of LABEIN-Tecnalia in Derio (Spain) in February 2009. It shows the results obtained and explain the lessons learned from this series of experiments to assess the application of a unified testing procedure across different testing environments.