Effects on thermal power systems in coordination with hydropower systems

Energy systems where power production is dominated by thermal power plants have different characteristics compared to hydropower dominated systems, and a coordination of these systems gives an economic benefit for both systems. The simulation model ESIM can be used to analyse different power exchange strategies for such systems. This work focus on systems dominated by thermal power production and how-power exchange influence on these systems. The ESIM model can handle energy neutral contracts for power exchange as well as quoted energy exchange or power exchange based on given marked prices. Fuel constraint units are implemented, and emissions are modelled to handle environmental taxes properly for different emission components. Obtained results show that energy neutral power exchange contracts between Norway and Germany can increase emissions of CO2, because coal fired units will Increase the power production at low load and hydropower will substitute peak power based on natural gas. To verify the effect of different CO2 taxes a thermal system is analysed.