Management of fluctuations in wind power and CHP comparing two possible Danish strategies

This paper discusses the perspective of renewable energy (wind, solar, wave and biomass) in the making of strategies for a sustainable development. Such strategies typically involve three major technological changes: energy savings on the demand side, efficiency improvements in the energy production, and replacement of fossil fuels by various sources of renewable energy. Consequently, large-scale renewable energy implementation plans must include strategies of how to integrate the renewable sources in coherent energy systems influenced by energy savings and efficiency measures. Based on the case of Denmark, this paper discusses the problems and perspectives of converting present energy systems into a 100 percent renewable energy system. The conclusion is that such development will be possible. The necessary renewable energy sources are present, if further technological improvements of the energy system are achieved. Especially technologies of converting the transportation and the introduction of flexible energy system technologies are crucial.

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“…The EnergyPLAN model has been used for a number of similar analyses of large-scale integration of renewable energy [30,[32][33][34][35][36].…”

Section: Methodsmentioning

confidence: 99%

Renewable energy strategies for sustainable development

Lund

2007

Energy

Self Cite

1,240

472

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“…In future power systems, a large fraction of intermittent power, such as wind and solar energy, will be needed, which poses a challenge in balancing demand and supply. [1][2][3][4] According to the Swedish Transmission System Operator (TSO), the Swedish secondary power balancing requirement will increase from 1800 MW in 2013 to 2300-3200 MW in 2025 due to increased wind power capacity. 5,6 Today, most secondary power balancing in Sweden is achieved by starting or stopping hydropower aggregates, but there is great unused capacity in other types of power plants.…”

Section: Introductionmentioning

confidence: 99%

Demand-Orientated Power Production from Biogas: Modeling and Simulations under Swedish Conditions

et al. 2015

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The total share of intermittent renewable electricity is increasing, intensifying the need for power balancing in future electricity systems. Demand-orientated combined heat and power (CHP) production from biogas has potential for this purpose. An agricultural biogas plant, using cattle manure and sugar beet for biogas and CHP production was analysed here. The model Dynamic Biogas plant Model (DyBiM) was developed and connected to the Anaerobic Digestion Model No. 1 (ADM1). Flexible scenarios were simulated and compared against a reference scenario with continuous production, in order to evaluate the technical requirements and economic implications of demand-orientated production. The study was set in Swedish conditions regarding electricity and heat price and the flexibility approaches assessed were increased CHP and gas storage capacity and feeding management. The results showed that larger gas storage capacity was needed for demand-orientated CHP production, but that feeding management reduced the storage requirement because of fast biogas production response to feeding. Income from 2 electricity increased by 10%, applying simple electricity production strategies to a doubled CHP capacity. However, as a result of the currently low Swedish diurnal electricity price variation and lack of subsidies for demand-orientated electricity production, the increase in income was too low to cover the investment costs. Nevertheless, DyBiM proved to be a useful modelling tool for assessing the economic outcome of different flexibility scenarios for demand-orientated CHP production.

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“…However, in Europe combined heat and power systems operate as grid-supporting resources that are typically integrated into district heating loops [9]. Thereby, large units are well thermally integrated and provide flexible electrical energy to the grid providing benefits to both the end-user and the utility [10].…”

Section: Introductionmentioning

confidence: 99%

Dynamic modeling and evaluation of solid oxide fuel cell – combined heat and power system operating strategies

Nanaeda

Mueller

Brouwer

et al. 2010

Journal of Power Sources

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a b s t r a c tOperating strategies of solid oxide fuel cell (SOFC) combined heat and power (CHP) systems are developed and evaluated from a utility, and end-user perspective using a fully integrated SOFC-CHP system dynamic model that resolves the physical states, thermal integration and overall efficiency of the system. The model can be modified for any SOFC-CHP system, but the present analysis is applied to a hotel in southern California based on measured electric and heating loads. Analysis indicates that combined heat and power systems can be operated to benefit both the end-users and the utility, providing more efficient electric generation as well as grid ancillary services, namely dispatchable urban power.Design and operating strategies considered in the paper include optimal sizing of the fuel cell, thermal energy storage to dispatch heat, and operating the fuel cell to provide flexible grid power. Analysis results indicate that with a 13.1% average increase in price-of-electricity (POE), the system can provide the grid with a 50% operating range of dispatchable urban power at an overall thermal efficiency of 80%. This gridsupport operating mode increases the operational flexibility of the SOFC-CHP system, which may make the technology an important utility asset for accommodating the increased penetration of intermittent renewable power.

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Management of fluctuations in wind power and CHP comparing two possible Danish strategies

Cited by 93 publications

References 12 publications

Renewable energy strategies for sustainable development

Renewable energy strategies for sustainable development

Demand-Orientated Power Production from Biogas: Modeling and Simulations under Swedish Conditions

Dynamic modeling and evaluation of solid oxide fuel cell – combined heat and power system operating strategies

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