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Search: FÖRF:(Pär Holmberg) > (2015-2019)

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1.
  • Sarfati, Mahir, et al. (author)
  • Production efficiency of nodal and zonal pricing in imperfectly competitive electricity markets
  • 2019
  • In: Energy Strategy Reviews. - : ELSEVIER SCIENCE BV. - 2211-467X .- 2211-4688. ; 24, s. 193-206
  • Journal article (peer-reviewed)abstract
    • Electricity markets employ different congestion management methods to handle the limited transmission capacity of the power system. This paper compares production efficiency and other aspects of nodal and zonal pricing. We consider two types of zonal pricing: zonal pricing with Available Transmission Capacity (ATC) and zonal pricing with Flow-Based Market Coupling (FBMC). We develop a mathematical model to study the imperfect competition under zonal pricing with FBMC. Zonal pricing with FBMC is employed in two stages, a dayahead market stage and a re-dispatch stage. We show that the optimality conditions and market clearing conditions can be reformulated as a mixed integer linear program (MILP), which is straightforward to implement. Zonal pricing with ATC and nodal pricing is used as our benchmarks. The imperfect competition under zonal pricing with ATC and nodal pricing are also formulated as MILP models. All MILP models are demonstrated on 6-node and the modified IEEE 24-node systems. Our numerical results show that the zonal pricing with ATC results in large production inefficiencies due to the inc-dec game. Improving the representation of the transmission network as in the zonal pricing with FBMC mitigates the inc-dec game.
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2.
  • Holmberg, Pär, et al. (author)
  • Comparison of congestion management techniques: Nodal, zonal and discriminatory pricing
  • 2015
  • In: Energy Journal. - : International Association for Energy Economics. - 1944-9089 .- 0195-6574. ; 36:2, s. 145-166
  • Journal article (peer-reviewed)abstract
    • Wholesale electricity markets use different market designs to handle congestion in the transmission network. We compare nodal, zonal and discriminatory pricing in general networks with transmission constraints and loop flows. We conclude that in large games with many producers and certain information, the three market designs result in the same efficient dispatch. However, zonal pricing with counter-trading results in additional payments to producers in export-constrained nodes, which leads to inefficient investments in the long-run.
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