Modelling wind power
The integration of substantial amounts of intermitting renewable power production such as wind power in a liberalized electricity system causes chain reactions in technical and economical power system performance. Technical instability can result from transmission bottlenecks between various regions due to increased wind power generation. Economically, these changes in system operations have cost and consequently price implications. The analysis of the impact of introducing significant shares of wind power in an electricity system requires the modelling of the stochastic behaviour of wind generation. The WILMAR project investigated these strains and problems and developed a modelling tool to analyse the integration of renewable power technologies into existing power systems. More specifically, the modelling tool investigates the wind integration ability of large electricity systems with substantial amounts of power trade in power pools and system stability issues. In this way, it provides a strategic planning tool, which provides a firm basis for decision-making in the power pools. A User Shell implemented in an Excel workbook controls the Wilmar Planning Tool. All data is contained in an Access database that communicates with various sub-models through text files that are exported from or imported to the databases. The Joint Market Model (JMM) constitutes one of these sub-models. The JMM output database stores the results of modelling runs and contains forms and queries to present the data. The comparison of different cases is carried out through queries, designed so as to minimize the time needed to retrieve information from the tables. The most important data can be shown graphically using a set of forms from the database such as forms for electricity prices, wind power forecast versus realized wind power, power production distributed on fuels and production with consumption and transmission. The Wilmar Planning tool, which comprises part of the output database, offers the means for analysis of wind power integration subjects. Collaboration with research institutions and consultancy companies is now sought for further development and use of this tool.
