Flexibility-enhanced strategies of generations to improve the integration of renewable energy considering uncertainties

Dai, Wei; Luo, Ceheng; Mo, Jingshan; Liu, Zining; Jiang, Zhongyao; Wen, Fangjun; Goh, Hui Hwang

doi:10.1016/j.egyr.2023.04.204

Cited by 12 publications

(2 citation statements)

References 16 publications

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“…Section 3.1.7 describes a safety constraint called maximum dispatch power to avoid load shedding due to low frequency, as shown in Equation (15). Finally, points 3.1.8 and 3.1.9 of this section correspond to the mathematical modeling of gas volume stock control for thermal power plants and hydro generation storage through a level of control level for large reservoir hydro plants, as shown in Equations ( 16)- (18).…”

Section: Mathematical Methodology To Implement the Modeling Of A Redi...mentioning

confidence: 99%

“…While in the USA, decarbonization in the entire energy economy will require power systems to rely heavily on variable renewable energy, mainly solar-wind generation, very similar to the situation in South America since in the USA marginal costs are projected to be close to zero [17]. However, there are forecasting errors in the scheduled operation, deficit of tools or models to anticipate the uncertainty of renewable generation in real time [18]. These will lead to instability of marginal costs and inefficient control of demand curve tracking, generating a risk in real-time operation, because they require greater power reserve capacities to mitigate the resources associated with frequency control and dispatches of plants out of economic order [19].…”

Section: Redispatch Stabilizes Marginal Costs Due To Uncertainty Of R...mentioning

confidence: 99%

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Redispatch Model for Real Time Operation with High Solar-Wind Penetration and its Adaptation to the Ancillary Services Market

Balzer,

Watts

2023

Preprint

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Modern electrical power systems integrate renewable generation, with solar generation being one of the pioneers worldwide. In Latin America, the greatest potential and development of solar generation is found in Chile through the National Electric System. However, its energy matrix faces a crisis of drought and reduction of emissions that limits hydroelectric generation and involves the definitive withdrawal of coal generation. The dispatch of these plants is carried out by the system operator, who uses a simplified mechanism, called “economic merit list” and which does not reflect the real costs of the plants to the damage of the operating and marginal cost of the system. This inefficient dispatch scheme fails to optimize the availability of stored gas and its use over time. Therefore, a real-time redispatch model is proposed that minimizes the operation cost function of the power plants, integrating the variable generation cost as a polynomial function of the net specific fuel consumption, adding gas volume stock restrictions and water reservoirs. In addition, the redispatch model uses an innovative "maximum dispatch power" restriction, which depends on the demand associated with the automatic load disconnection scheme due to low frequency. Finally, by testing real simulation cases, the redispatch model manages to optimize the operation and dispatch costs of power plants, allowing the technical barriers of the market to be broken down with the aim of integrating ancillary services in the short term, using the power reserves in primary (PFC), secondary (SCF), and tertiary (TCF) frequency control.

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Section: Mathematical Methodology To Implement the Modeling Of A Redi...mentioning

confidence: 99%

Section: Redispatch Stabilizes Marginal Costs Due To Uncertainty Of R...mentioning

confidence: 99%

Redispatch Model for Real Time Operation with High Solar-Wind Penetration and its Adaptation to the Ancillary Services Market

Balzer,

Watts

2023

Preprint

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Transparent Photovoltaics with Array ZnO/NiO Structure for Energy Harvesting and Human Interface Applications

Lee,

Choi,

Ghosh

et al. 2024

Solar RRL

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In this study, a proof of concept for seamless energy flow is demonstrated by converting light energy into electrical energy and then storing it. A simple heterojunction structure of an FTO/ZnO/NiO/AgNWs/ZnO array transparent photovoltaic (TPV) device is employed to ensure an excellent average visible transmittance value of 67.7% while storing light energy as electrical energy in a capacitor bank. By simple and stable array connection of unit cell devices, the power leakage is minimized while maximizing output voltage. In the array TPV device, an open‐circuit voltage of 1.4 V is achieved under 365 nm illumination, with a voltage of 1.26 V stored in the capacitor bank, accumulating to over 6 V. The stored electrical energy is successfully converted for use by an light‐emitting diode (LED) light source, demonstrating sustained light‐up for over 30 s. This work explores facile energy generation, storage and utilization through TPVs, with a good potential for transparent energy harvesting and human interface applications.

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Nexus of innovation, foreign direct investment, economic growth and renewable energy: New insights from 60 countries

Hoa,

Xuan,

Thu

et al. 2024

Energy Reports

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Flexibility-enhanced strategies of generations to improve the integration of renewable energy considering uncertainties

Cited by 12 publications

References 16 publications

Redispatch Model for Real Time Operation with High Solar-Wind Penetration and its Adaptation to the Ancillary Services Market

Redispatch Model for Real Time Operation with High Solar-Wind Penetration and its Adaptation to the Ancillary Services Market

Transparent Photovoltaics with Array ZnO/NiO Structure for Energy Harvesting and Human Interface Applications

Nexus of innovation, foreign direct investment, economic growth and renewable energy: New insights from 60 countries

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