Task 3.3: Data Requirements in grid codes for real-time forecasting
The third task deals with measurement data for real-time forecasting applications at system operators and the need of standardization of meteorological measurement data instrumentation and collection for grid codes.
State of the art wind power forecasting methodologies utilise, besides wind speeds from weather forecasts, onsite real-time power measurements from SCADA systems and meteorological measurements from met masts or alternatives thereof to compute wind power. The combined use of the trend of the forecast and measured meteorological variables is the state-of-the-art method to be able to predict wind power in the next few hours, as well as high speed shut-down and critical ramping events. This explains the need for high quality measurements, even though similar considerations are applicable in the management of dispatch, i.e. ranging down to cover also lower wind speeds.
Today, there are no standards or guidelines for grid code development on the quality requirements for instrumentation or on the type of instrumentation itself that would help system operators to develop their grid codes.
The IEC 61400-12 standard, guidelines from MEASNET and some recommended practices from IEA Wind Tasks are applicable only in resource assessments. The US environmental protection agency’s (EPA) “Meteorological Monitoring Guidance for Regulatory modelling Applications” and the WMO No.8 CIMO Guide “Meteorological Instruments and Methods of Observation” are guidelines on meteorological instrumentation and the collection of meteorological data for use in regulatory general meteorological modelling applications such as air quality, safety, etc. All these guidelines and standards provide recommendations for instrument, measurement and reporting for all main meteorological variables. However, only the EPA guidelines deal with real-time usage, but only for meteorological modelling.
These existing guidelines and practices need to be studied and adjusted for the real-time usage in the power industry and specific guidelines or recommended practices developed for the real-time environment.
In order to ease the implementation of standards into the grid codes, this task will produce a recommended practices guideline for system operators.
Links:
For more information or if you are interested in contributing to the above topics, please contact the task lead Dr. Corinna Möhrlen.