We estimate the long-run economic value of variable renewable generation with increasing penetration using a unique investment and dispatch model that captures long-run investment decisions while also incorporating detailed operational constraints and hourly time resolution over a full year. High time resolution and the incorporation of operational constraints are important for estimating the e...

This article describes a techno-economic model for pumped thermal energy storage systems based on recuperated Joule-Brayton cycles and two-tank liquid storage. Models have been developed each component, with particular emphasis the heat exchangers. Economic metrics such as power capital costs (i.e., per-kW per-kWh capacity) levelized cost of are evaluated by gathering numerous correlations from...

In current conventional utility systems, fossil fuel or nuclear power plants must back up intermittent renewable electricity generators if the utility grid is to have acceptable reliability. For low levels of intermittent power, this can be achieved without difficulty or added expense. For high levels this reliance on other generators becomes explicit and increasingly expensive, and transmissio...

Abstract The development and utilization of basin hydropower-photovoltaic-storage integrated energy system aim to smooth out the fluctuation new generation capacity with regulating ability hydropower pumped-storage power station, thus promoting large-scale consumption energy. For regions rich in water, wind, solar, resources, main problem is how allocate a reasonable scale photovoltaic wind pro...

The urgent energy transition needs a better penetration of renewable in the world’s mix. intermittency renewables requires use longer-term storage. present system uses water displacement, lined rock cavern or an aerial pressurised vessel, as virtual piston compressor and expander functions carbon dioxide heat pump cycle (HPC) organic transcritical (OTC). Within impermeable membrane, is compress...

In engineering construction, the accurate estimation of investment cost can provide a reasonable basis for formulation and decision-making construction scheme. this paper, wind-storage combined operation power station is taken as research object, model established, mode analysed to obtain annual generation. Finally, according generation, per unit electricity established. past, wind farm pumped ...

Climate change mitigation will require extensive decarbonization of the electricity sector. This thesis addresses both large-scale wind integration (Papers 1–3) and development of new energy technologies (Paper 4) in service of this goal. Compressed air energy storage (CAES) could be paired with a wind farm to provide firm, dispatchable baseload power, or serve as a peaking plant and capture up...

Liquid air energy storage (LAES) is a novel technology for grid scale electrical energy storage in the form of liquid air. At commercial scale LAES rated output power is expected in the range 10 to 100 MWe, while the storage capacity of the order of 100s of MWhe. LAES comprises three processes: charging, consisting in air liquefaction; storage, involving preservation of air in liquid form; and ...

For the multi-energy power system composed of thermal power, wind and a pumped-storage station aiming at minimizing coal consumption grid, an optimal dispatch model is established in this paper. Its advantage to allow grid accept high proportion new energy while ensuring demand. The dynamic programming method used solve problem. In solution process, traditional improved by introducing penalty f...