| 1. Introduction | | | | research in the PhD-project will be to improve this |
| Today power system has import in normal inflow | | | | process in means of models and especially the |
| years, and without the reduction in consumption seen in | | | | connection between them. |
| 2002-2003 the energy deficit in the 2003 would have | | | | Fig. 2. Decomposing the planning process |
| been hard to neglect. The expected future growth of | | | | Describing the overall process is important and a |
| the consumption together with reluctance to usage the | | | | publication focusing on methods on different levels and |
| remaining hydropower resources shifts the balance | | | | how to connect them is under writing. Establishing a |
| even further. The criterion for the thesis is to contribute | | | | better model for connecting the long- and |
| to an efficient usage of the hydropower system in | | | | medium-term strategic planning with short-term |
| compliance with other natural energy resources in | | | | scheduling is the main focus on the practical work |
| Norway. The overall picture is illustrated in fig. 1, this is | | | | carried out at the moment. This could also be called |
| the framework for utilizing hydro power in Norway. | | | | refitting the strategy. The main challenge is that the |
| Fig 1. Optimal usage of hydropower | | | | number of details, it is possible to include in stochastic |
| 2. Outer ring | | | | models on the long-term or medium-term level, is lower, |
| Most elements in the outer ring impact on the | | | | that the number of details that must be included in |
| conditions for optimal utilization of the hydropower | | | | operational models. This may result in errors when |
| resources. In the research the resource inflow will be | | | | implementing the long-term strategy. Such errors are |
| considered exogenous given but impact from a | | | | not only bad for the companies but may also impact |
| changing climate is briefly covered in [1]. So far the | | | | on the overall success of maintaining the energy |
| climate change goes in favor of hydro power. Not only | | | | balance in the system. |
| will the inflow in important hydro power areas increase, | | | | How to implement the short-term decisions in the |
| the inflow will also a change in distribution over the | | | | market is described in [2] and [3]. Various techniques |
| year that reduces spillage. Energy policy is considered | | | | have been developed over the years for modelling |
| an externality except when it comes to environment. | | | | short-term scheduling in thermal as well as |
| Environment for hydropower usage is dependent on | | | | hydropower dominated systems. An overview of |
| both national and international trends. Global emission is | | | | these methods and their implications regarding |
| debated and the value of hydropower can be | | | | application for hydropower is described in [5]. The area |
| expected to increase [6]. Local impact from | | | | of short-term scheduling for hydro power is becoming |
| hydropower may be discussed in terms of how to | | | | more focused in the power companies. This increases |
| minimize these impacts this could somehow be | | | | the need for decision support for special topologies as |
| included in the research. Combined action with | | | | described in [4]. |
| neighboring systems will be important for security of | | | | References |
| the energy supply in the hydropower system and may | | | | [1] M.M. Belsnes, A. Haakestad and L. Tøfte, |
| lead to synergy effects on money flow and | | | | ”Impact from climate change on regulated |
| environment as well. | | | | watercourses”, |
| 3. Market & Rules | | | | Hydropower’05, Stavanger, May 2005. |
| Then the market ring is a task by itself. In this project | | | | [2] O.B. Fosso and M.M. Belsnes, “Short-term Hydro |
| “Market&Rules” is provider of premises for | | | | Scheduling in a Liberalized Power System”, |
| the planning processes that decides whether | | | | PowerCon 2004, Singapore, Nov. 2004 |
| hydropower can be optimally utilized or not. At least at | | | | [3] M. M. Belsnes, I. Honve, SINTEF Energy Research |
| this point the market, the set rules and other | | | | Prof. O. B. Fosso, Norwegian University of Science and |
| constraints are considered externally given. The | | | | Technology “Bidding in the secondary reserve |
| modeling of market and market imperfections is | | | | market from a hydropower perspective”, PSCC |
| important to understand and model in order to | | | | 2005, Liege, Aug.2005. |
| investigate the current market situation. An exam work | | | | [4] M.M. Belsnes, J. Røynstrand and O.B. Fosso, |
| for a course in market power at NHH showed that | | | | “Handling State Dependent Nonlinear Tunnel Flows |
| even a small imperfection may lead to a large shift in | | | | in Short-term Hydropower Scheduling”, |
| benefit between supply and demand. A publication | | | | POWERCON 2004, Singapore. |
| describing market models and market modeling is | | | | [5] M.M. Belsnes, T. Gjengedal and O.B. Fosso, |
| under construction together with Post. Doc. Geir | | | | “Methods for Short-term Generation Scheduling in |
| Warland. How to implement the short-term decisions in | | | | Hydro Power Dominated Power Systems”, |
| the market is described in [2] and [3]. | | | | Hydropower’05, Stavanger, May 2005. |
| 4. Planning process | | | | [6] Michael M. Belsnes, Arne Haugstad, Birger Mo and |
| From an operation research perspective the planning | | | | Peter Markussen ”Quota Modelling in Hydrothermal |
| processes are complex and for practical purposes it | | | | Systems” PowerTech 2003, Bologna, June 2003. |
| also needs to be decomposed. The main focus of the | | | | |