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- Andersson, Maria, 1965-
(författare)
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Cooperation in local electricity markets : modelling of technical measures
- 1997
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This thesis presents a system analysis for co-operation in local electricity markets including distributors and customers. The purpose of co-operation is to minimise the system cost of local markets by introducing system measures, such as end-use measures and municipal co-generation plants. Co-operation will strengthen the position of local markets in the national as well as future international electricity markets. With end-use measures local markets will achieve flexibility, additional reserve capacity and ability to avoid sudden large costs for peak loads. Biomass-fired cogeneration plants can become of great importance in an international market. In Sweden there is a simultaneous demand for electricity and district heating, many local markets already include district heating systems and there are major forest areas which can contribute with renewable fuel. The system analysis is partly based on the simulation model (INDSIM) and the linear programming model (MODEST). The simulation model has been further developed (STRATO) to include calculation of system costs. Shadow price analysis has been developed in order to study incentives for system measures. Calculation procedures have been developed that describe cooperation between distributor and customer. Six case studies of a selection of real, existing local markets in Sweden are presented. The studies show the potential economical effects of co-operation measured by system costs and shadow prices. Co-operation has been considered between demand- and supply-side, electricity- and district heating systems and also between different time periods. In a typical local market with 90 000 inhabitants, if end use measures are introduced without cooperation the system cost of the distributor will increase by 14 million SEK for a time period of 25 years. If instead end-use measures are introduced in co-operation, together with a biomass-fired cogeneration plant, the system cost of the local market will be reduced by 444 million SEK. Furthermore, the use of biomass in the local market is increased from 36 to 72 % while the use of oil is decreased from 34 to 1%. Another case study of another local market (50 000 inhabitants) shows that end-use measures will reduce the system cost (excluding investment costs) of an industry by 50 % corresponding to 1.3 million SEK for one year. The end-use measures imply reduced power demand during peak load periods in the local market and increased power demand during non- peak load periods.
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- Andersson, Maria, 1965-, et al.
(författare)
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Cost-effective energy system measures studied by dynamic modelling
- 1993
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Ingår i: 2nd International Conference on Advances in Power System Control, Operation and Management, APSCOM-93.. - London : Institution of Electrical Engineers (IEE). - 0852965699 ; , s. 448-455
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Konferensbidrag (refereegranskat)abstract
- In a national electricity system there often exists a great potential for increasing the cost-efficiency of the electricity use. However, if the economic incentives for improving the use of the system are too weak, it is most likely that this potential will not be utilised. If electricity tariffs reflect real electricity costs, over the year and the day, cost-effective incentives will arise for introducing energy system measures that will reduce the energy system cost considerably. This paper presents two energy system analyses of an existing Swedish municipal energy system. The analyses are carried out with a simulation model for electricity use in industrial energy systems, and an optimisation model that is based on linear programming.<>
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- Andersson, Maria, 1965-, et al.
(författare)
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Cost-effective incentives for cooperation between participants in the electricity market
- 1996
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Ingår i: Applied Energy. - : Elsevier BV. - 0306-2619 .- 1872-9118. ; 54:4, s. 301-313
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Tidskriftsartikel (refereegranskat)abstract
- In the Swedish electricity system there is a great potential for increasing the cost efficiency of electricity use. Today economic incentives, offered for instance by existing electricity tariffs, are too weak to improve the use of the system. On the Swedish electricity market, there are at least three different participants, the power producer, the distributor and the customer. Today these participants act separately owing to low awareness of the costs for electricity over the year and the day. If the participants are aware of the real electricity costs, cost-effective incentives for cooperation will arise. When participants cooperate, the introduction of end-use measures will reduce system costs for those participants that are involved in cooperation. We present a system analysis for cooperation between distributor and customers. We also present results from a project, where behaviours of an existing distributor and existing customers have been analysed. The results show that there exist cost-effective incentives for cooperation when end-use measures are introduced.
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- Andersson, Maria, 1965-, et al.
(författare)
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Cost-effective incentives for end-use measures in a Swedish municipality
- 1996
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Ingår i: Proceedings of the International Symposium [on] Efficiency, Costs, Optimization, Simulation and Environmental Aspects of Energy Systems. - Stockholm : KTH Royal Institute of Technology. - 917170664X ; , s. 557-564
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Konferensbidrag (refereegranskat)abstract
- If actors on the electricity market cooperate when end-use measures are introduced the energy-system, cost will be reduced considerably. The marginal cost for electricity for the energy system of the actors will show cost effective incentives for introducing end-use measures. We present a system analysis for cooperation between distributors and customers. We also present results from a project where an existing distributor and eleven existing customers within a municipal energy system have been analysed. The customers are various industries, a hospital, an ice hockey arena, a harbour, a water-works, a warehouse, and a radio tower. The results show that the customers have in different end-use measures a power reduction capacity of maximum 8642 kW. With electricity costs of 1994 this corresponds to a reduction in the energy system cost of 2,852,000 SEK for one year. The results also show that for the distributor`s load curve of 1994, the full power reduction capacity can not be used since the peak loads of the five winter months are not so large and distinct. In that case the energy system cost can be reduced by 1,909,000 SEK, which is 67% of the maximum cost reduction. The end-use measures that are cost effective in this municipal energy system are load management and electricity generation in reserve power plants. We have also studied the profitability for introducing bivalent heating systems based on oil and electricity for heat loads that originally are based on oil. However, with existing electricity and oil costs there are no incentives for increasing the electricity use during non-peak load periods with bivalent heating systems.
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| 9. |
- Andersson, Maria, 1965-
(författare)
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Cost-effective incentives for local electric utilities and industries in co-operation : modelling of technical measures
- 1993
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Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
- In the Swedish electricity system there is a great potential for increasing the cost efficiency of the electricity use. However, today the economic incentives, offered for instance by existing electricity rates, are too weak to improve the use of the system. On the Swedish electricity market there are, at least, three different actors, the power producer, the distributor and the customer. Today these actors act separately due to low awareness of the costs for electricity generation, over the year and the day. If the actors are aware of the real electricity costs, cost-effective incentives will arise to introduce energy system measures that will reduce the energy system cost considerably. The thesis presents two energy system analyses of an existing Swedish municipality. The first analysis deals with the introduction of industrial end-use measures, with the local utility’s existing electricity rates as boundary conditions. The analysis is carried out with a simulation model for electricity use in industries. The second analysis deals with the introduction of energy system measures, on the municipal supply-side and demand-side, when the local electric utility and the customers are regarded as one system. The analysis is carried out with an optimization model, that is based on linear programming. The results show that if 17 industries introduce end-use measures, with the existing electricity rates as boundary conditions, their energy system costs will be reduced by 12 MSEK for a time period of 10 years, whereas the local utility will increase its energy system cost by 6 MSEK. However, if there is a co-operation between the local electric utility and the customers, their joint energy system cost will be reduced by 330 MSEK for a time period of 10 years.
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| 10. |
- Andersson, Maria, 1965-, et al.
(författare)
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Energy system cost reduction as a result of end-use measures and the introduction of a biomass-fired co-generation plant
- 1993
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Ingår i: International Conference on Renewable Energy - Clean Power 2001. - London : Institution of Electrical Engineers (IEE). - 0852966059 ; , s. 37-42
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Konferensbidrag (refereegranskat)abstract
- This paper will describe an energy system analysis of an existing Swedish municipality of 90 000 inhabitants. The analysis, which is performed by using an optimization model will show what energy system measures that should be introduced to minimize the total energy system cost. In the existing municipality a local utility distributes heat, for the district heating system, and electricity. The heat is generated by the utility and the electricity is purchased from a large power producer.
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