The workshop on Metrology for Future Smart Grid Technologies organized by VSL on 19 and 20 April in Haarlem, The Netherlands, was a great success. The workshop was one of the final activities of three European joint research projects in the area of Smart Electrical Grid Metrology.
Measurements are required to support the transition from the conventional electricity grid, designed to transmit and distribute power from a few central generators to a large amount of users, to smart grids, using two-way flows of electricity and information to create an automated and distributed advanced energy delivery network. The increased distributed generation with various renewable energy sources demands new measurement techniques and planning tools to assure proper power quality and grid stability. Three EU metrology research projects which focus on the development of such measurements combined forces to host a joint final dissemination workshop for stakeholders from power industry, utilities, academia and other interested participants to disseminate their results:
• Measurement tools for smart grid stability and quality (SmartGrid-II, www.smartgrids2.eu)
• Sensor network metrology for the determination of electrical grid characteristics (GridSens, www.gridsens.eu)
• Non-conventional voltage and current sensors for future power grids (FutureGrid, futuregrid.emrp.eu)
The workshop was attended by more than 70 participants, among which manufacturers, utilities, universities and other project stakeholders, mainly from Europe but also from China and Korea.
PhD researchers who are working in the Horizon 2020 project MEAN4SG (Metrology Excellence Academic Network for Smart Grids, www.mean4sg-itn.eu) attended the workshop as part of their education program. The workshop consisted of oral and poster presentations. The oral presentations were followed by lively discussions, many of which were continued in the breaks of the workshop. Several presentations showcased the excellent results achieved by the project partners within the three projects.
The first day started with an overview presentation of Gert Rietveld from VSL about the present and future measurement challenges in smart electrical grids and the role of the three projects related to these challenges.
The morning session continued with presentations showing the progress related to grid stability and algorithms and measurements to improve the reliability of state estimation in distribution grids. Among others improved optimal placement algorithms and the application of state estimation algorithms with real measurements in distribution grids was presented. Other examples include the use of smart meter data in state estimation, a real time digital simulator, and methods for secure data communication.
The focus of the afternoon session was on wider application of novel sensor technologies in future power networks. In order to support the emergence of the new technologies, new measurement and calibration techniques were presented at the workshop. Examples are broadband high-accuracy sensors based on the optical Faraday effect, magnetic shielding of Rogowski coils, interrogation of sensors using fibre Bragg grating, and new calibration services for non-conventional sensors with analogue or digital output in line with IEC 61850-9-2.
The second day was dedicated to wide area Smart Grid measurement challenges, where accurate time synchronization of data acquisition is important. Presentations were given on wide-area power quality (PQ) propagation measurements in the Enduris Grid in the Netherlands and the Bornholm Island in Denmark, both containing sites with several renewable energy sources. Calibration systems for static and dynamic testing of phasor measurement units (PMU) for distribution networks were presented as well. Further presentations included network impedance measurements at fundamental and harmonic frequencies, and frequency behavior of transformers in PMU/PQ measurement systems.
The day was concluded by a panel discussion in which the three project coordinators and two other lead scientists in the field discussed the future challenges in smart grid metrology. Many questions and statements from the audience were argued in a lively discussion.
In summary, the workshop shared the lessons learned during the projects with stakeholders and project partners. These were indicative of the success of the projects, namely the results of fruitful interaction between metrologists and technicians from utilities and other stakeholders.
For further information please contact Helko van den Brom, email@example.com