Browsing SINTEF Open by Author "Skjelbred, Hans Ivar"
Now showing items 1-15 of 15
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A comparison of linear interpolation and spline interpolation for turbine efficiency curves in short-term hydropower scheduling problems
Skjelbred, Hans Ivar; Kong, Jiehong (Journal article; Peer reviewed, 2019)The purpose of short-term hydropower scheduling (STHS) in a competitive electricity market is to maximize the profit in the near future while adapting to the mid-term strategies for system operation. To ensure a realistic ... -
An overview on formulations and optimization methods for the unit-based short-term hydro scheduling problem
Kong, Jiehong; Skjelbred, Hans Ivar; Fosso, Olav B (Journal article; Peer reviewed, 2019)The short-term hydro scheduling (STHS) problem aims at determining the optimal power generation schedules for either a single hydropower plant or an integrated system of cascaded watercourses during a time horizon from a ... -
Comparing Bidding Methods for Hydropower
Aasgård, Ellen Krohn; Skjelbred, Hans Ivar; Solbakk, Fredrik (Journal article; Peer reviewed, 2016)In this paper we compare several methods used by hydropower producers for the determination of bids to the day-ahead market. The methods currently used by the hydropower industry are based on heuristics and expert assessments, ... -
Impact of energy pricing regimes on production schedules under solar-hydro hybridization
Kong, Jiehong; Sheppard, Alexandra Jane; Nøvik, Hanne; Engelstad, Øyvind; Fjelldal, Bjørnar; Klæboe, Gro; Skjelbred, Hans Ivar (Chapter; Peer reviewed, 2023)Hybridization of complementary energy production increases system flexibility and allows optimization of energy and resource availability. Hydropower and floating solar photovoltaics (FPV) have a high potential for ... -
Increased Information Flow between Hydropower Scheduling Models through Extended Cut Sharing
Gjerden, Knut Skogstrand; Skjelbred, Hans Ivar; Mo, Birger (Journal article; Peer reviewed, 2016)We present initial results and description of a method for coupling long term hydro scheduling models to short term hydro schedul- ing models. The method is based on an established approach but extends on the principle to ... -
Linear mixed-integer models for biomass supply chains with transport, storage and processing
van Dyken, Silke; Bakken, Bjørn Harald; Skjelbred, Hans Ivar (Journal article; Peer reviewed, 2010) -
Machine Learning for Hydropower Scheduling: State of the Art and Future Research Directions
Bordin, Chiara; Skjelbred, Hans Ivar; Kong, Jiehong; Yang, Zhirong (Peer reviewed; Journal article, 2020)This paper investigates and discusses the current and future role of machine learning (ML) within the hydropower sector. An overview of the main applications of ML in the field of hydropower operations is presented to show ... -
Modelling Minimum Pressure Height in Short-term Hydropower Production Planning
Dorn, Frederic; Farahmand, Hossein; Skjelbred, Hans Ivar; Belsnes, Michael Martin (Journal article; Peer reviewed, 2016)When planning the production for certain hydropower plants, minimum pressure is one of the major critical points. Violation of the minimum pressure causes the power plant to automatically shut down, hence violating the ... -
Operational hydropower scheduling with post-spot distribution of reserve obligations
Kong, Jiehong; Skjelbred, Hans Ivar (International Conference on the European Energy Market;2017, Chapter; Peer reviewed, 2017)As a reliable and flexible electric power source, hydropower can quickly adjust its generation level and provide reserve power to balance the power fluctuations in the system. In this paper, we assume that the day-ahead ... -
Operational Hydropower Simulation in Cascaded River Systems for Intraday Re-Planning
Skjelbred, Hans Ivar; Kong, Jiehong (Chapter; Peer reviewed, 2018)In this paper, we introduce an operational implementation of a hydropower simulator for cascaded river systems. It is presently used for decision support in the intraday re-planning by the largest hydropower producer in ... -
Operational use of marginal cost curves for hydropower plants as decision support in real-time balancing markets
Skjelbred, Hans Ivar; Kong, Jiehong; Larsen, Tellef Juell; Kristiansen, Fredd (International Conference on the European Energy Market;2017, Chapter; Peer reviewed, 2017)When participating in the real-time balancing markets, hydropower producers keep making decisions about how much power they are willing to sell or purchase at what prices from the markets. Due to the specific market ... -
Optimizing day-ahead bid curves in hydropower production
Aasgård, Ellen Krohn; Naversen, Christian Øyn; Fodstad, Marte; Skjelbred, Hans Ivar (Journal article; Peer reviewed, 2017)In deregulated electricity markets, hydropower producers must bid their production into the day-ahead market. For price-taking producers, it is optimal to offer energy according to marginal costs, which for hydropower are ... -
Progressive hedging for stochastic programs with cross scenario inequality constraints
Aasgård, Ellen Krohn; Skjelbred, Hans Ivar (Journal article; Peer reviewed, 2020)In this paper, we show how progressive hedging may be used to solve stochastic programming problems that involve cross-scenario inequality constraints. In contrast, standard stochastic programs involve cross-scenario ... -
Short-term hydro scheduling of a variable speed pumped storage hydropower plant considering head loss in a shared penstock
Kong, Jiehong; Skjelbred, Hans Ivar; Abgottspon, Hubert (Journal article; Peer reviewed, 2019)In this paper we present in detail how to handle the nonlinear and state-dependent elements in the power consumption function (PCF) of a variable speed pump (VP). The function is formulated by piecewise linear approximations ... -
Validating the SHARM model
Aasgård, Ellen Krohn; Bolkesjø, Tor Halvor; Johnsen, Rita Iren; Kristiansen, Fredd; Larsen, Tellef Juell; Riddervold, Hans Ole; Røynstrand, Jarand; Soknes, Dan; Skjelbred, Hans Ivar (SINTEF Energi. Rapport;TR A7521, Research report, 2015)