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HIGH QUALITY MODELLING OF HYDRO POWER PLANTS FOR RESTORATION STUDIES
Copyright © 2002 IFAC 15th Triennial World Congress, Barcelona, Spain
www.elsevier.com/locate/ifac
HIGH QUALITY MODELLING OF HYDRO POWER PLANTS FOR RESTORATION STUDIES H. W. Weber a, M. Hladky a, T. Haase a, S. Spreng b, C. N. Moser c a Institute of Power Electrical Engineering, University of Rostock, Albert-EinsteinStr. 2, 18051 Rostock, Germany b Aare-Tessin AG für Elektrizität ,Bahnhofquai 12, 4601 Olten, Switzerland c Bernische Kraftwerke FMB Energie AG, Victoriaplatz 2, 3000 Bern 25, Switzerland
Abstract: The verification of existing plans for network restoration after blackouts in European electrical energy systems becomes more and more important with the ongoing deregulation process. For this verification high quality computer models of the electrical system are necessary which are able to generate exact results for all possible restoration scenarios. The most important elements of these models are the power plants, which have to be developed with high accuracy. Therefore in this contribution the possible quality of power plant modelling will be shown exemplarily for a francis type and a pelton type hydro power plant, both located in the Swiss Alps. Copyright © 2002 IFAC Keywords: power plant modelling, simulation of electrical network restoration
1. INTRODUCTION
presented, one a francis type and one a pelton type plant.
In stability scenarios of electrical networks today often very simple and restricted models of power plants, loads and equipment for control and security purposes are used. The parameters of these models are often estimated only roughly. Models of this kind are sufficient for investigations concerning the so called global behaviour of interconnected networks (oscillations, primary and secondary control), because the related dynamic transients only influence the normally very well modelled main control loops of these models (Weber and Welfonder, 1988). But when it comes to computer simulations dealing with restoration scenarios for electrical networks much more detailed models of power plants and power systems are needed than e.g. with stability scenarios. Because in this investigations, especially for a particular power plant, all control loops and security equipment have to be modelled exactly. In this case, all possible transients are important for the whole working range of the plant, form zero to full operation. Especially security equipment with different triggering values, non-linearities and characteristics play a very important role in these restoration investigations. As examples for the high quality modelling possibilities of power plants two hydro power plants of the Swiss Alps will be
2. THE MODELLED POWER PLANTS The francis type power plant “Innertkirchen II” is located near the “Grimsel Pass” in the canton Bern as part of the cascade system “Oberhasli” and the pelton type plant “Airolo” is located near the “Gotthard Pass” in the canton Tessin as part of the cascade system “Lucendro”, see map Fig. 1 and overall overviews Fig. 2.
Innertkirchen II *
* Airolo
Fig. 1: Swiss map, location of plants ”Innertkirchen II” and “Airolo”
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www.elsevier.com/locate/ifac
HIGH QUALITY MODELLING OF HYDRO POWER PLANTS FOR RESTORATION STUDIES H. W. Weber a, M. Hladky a, T. Haase a, S. Spreng b, C. N. Moser c a Institute of Power Electrical Engineering, University of Rostock, Albert-EinsteinStr. 2, 18051 Rostock, Germany b Aare-Tessin AG für Elektrizität ,Bahnhofquai 12, 4601 Olten, Switzerland c Bernische Kraftwerke FMB Energie AG, Victoriaplatz 2, 3000 Bern 25, Switzerland
Abstract: The verification of existing plans for network restoration after blackouts in European electrical energy systems becomes more and more important with the ongoing deregulation process. For this verification high quality computer models of the electrical system are necessary which are able to generate exact results for all possible restoration scenarios. The most important elements of these models are the power plants, which have to be developed with high accuracy. Therefore in this contribution the possible quality of power plant modelling will be shown exemplarily for a francis type and a pelton type hydro power plant, both located in the Swiss Alps. Copyright © 2002 IFAC Keywords: power plant modelling, simulation of electrical network restoration
1. INTRODUCTION
presented, one a francis type and one a pelton type plant.
In stability scenarios of electrical networks today often very simple and restricted models of power plants, loads and equipment for control and security purposes are used. The parameters of these models are often estimated only roughly. Models of this kind are sufficient for investigations concerning the so called global behaviour of interconnected networks (oscillations, primary and secondary control), because the related dynamic transients only influence the normally very well modelled main control loops of these models (Weber and Welfonder, 1988). But when it comes to computer simulations dealing with restoration scenarios for electrical networks much more detailed models of power plants and power systems are needed than e.g. with stability scenarios. Because in this investigations, especially for a particular power plant, all control loops and security equipment have to be modelled exactly. In this case, all possible transients are important for the whole working range of the plant, form zero to full operation. Especially security equipment with different triggering values, non-linearities and characteristics play a very important role in these restoration investigations. As examples for the high quality modelling possibilities of power plants two hydro power plants of the Swiss Alps will be
2. THE MODELLED POWER PLANTS The francis type power plant “Innertkirchen II” is located near the “Grimsel Pass” in the canton Bern as part of the cascade system “Oberhasli” and the pelton type plant “Airolo” is located near the “Gotthard Pass” in the canton Tessin as part of the cascade system “Lucendro”, see map Fig. 1 and overall overviews Fig. 2.
Innertkirchen II *
* Airolo
Fig. 1: Swiss map, location of plants ”Innertkirchen II” and “Airolo”
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