Abstract
This paper presents a hydrothermal scheduling toolchain suitable for detailed studies of procurement of spinning reserves in the hydro-dominated Nordic power system. The toolchain combines a long-term model to find the expected marginal value of water in the hydropower reservoirs and initial states for thermal generators, and a short-term model to optimize the daily unit commitment and dispatch. The short-term model has a detailed description of both hydro and thermal generation technologies to realistically constrain their capabilities as reserve capacity providers. The toolchain is applied on a data description representing a 2030 scenario of the Northern European power system to quantify the benefits of exchanging spinning reserve capacity both between bidding zones and between countries within the Nordic market. By allowing 10% of the transmission line capacity for exchange of reserves, we find that the daily average economic benefit is 290 k€ and 102 k€ for reserve exchange between bidding zones and countries, respectively. Moreover, we quantify and illustrate the importance of applying unit commitment for hydropower stations and strictly enforcing their minimum power requirements.
Highlights
In the transition towards a low-carbon European power system, increasing shares of wind power in the system, retirement of thermal and nuclear power plants and increasing exchange capacities due to new interconnectors, are all examples of the structural system changes that are going to take place
We present a toolchain combining long- and short-term hydrother mal scheduling models in a consistent manner to quantify the benefit of exchanging spinning reserve capacity across bidding zones and countries in the Nordic power market
We presented a hydrothermal scheduling toolchain combining longand short-term models and applied it to quantify the benefit of exchanging spinning reserve capacity across bidding zones and coun tries in the Nordic power market
Summary
In the transition towards a low-carbon European power system, increasing shares of wind power in the system, retirement of thermal and nuclear power plants and increasing exchange capacities due to new interconnectors, are all examples of the structural system changes that are going to take place. We emphasize the point that this potential cannot be accurately assessed without detailed treatment of the hydro power system with its many complex cascade arrangements For this purpose we apply a hydrothermal scheduling toolchain comprising a long-term model to find the expected marginal value of stored water in the reservoirs and initial states for thermal generators, and a short-term model to optimize the daily operation for selected representative days. We present a toolchain combining long- and short-term hydrother mal scheduling models in a consistent manner to quantify the benefit of exchanging spinning reserve capacity across bidding zones and countries in the Nordic power market. We assess the benefits of exchanging spinning reserve capacity be tween bidding zones and countries within the Nordic market for a set of representative days for a scenario of the 2030 Northern European power system. To the best of our knowledge, this type of assessment has not been reported in the technical literature using models and toolchains with similar level of detail on both the hydro and thermal generation system
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