The real cost of deep peak shaving for renewable energy accommodation in coal-fired power plants: Calculation framework and case study in China

Meng, Yiqun; Li, Jinqiu; Liu, Chuang; Li, Jianlan; Cai, Guowei; Zhao, Qingsong; Liu, Yiping; Cao, Yuwei; Meng, Xin; Ge, Weichun; Yang, Qing

doi:10.1016/j.jclepro.2022.132913

Cited by 58 publications

(9 citation statements)

References 9 publications

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“…The reference literature and simulation result data of this paper are shown in Fig. (3). It can be seen from the figure that the maximum error between the two models reaches 5.2% when the heat source temperature is 75°C, proving the reliability of this model.…”

Section: Model Validationmentioning

confidence: 60%

“…Peak shaving ensures stable operation of the power grid, mitigates the risk of power supply shortages or surpluses, and enables the power system to cope with fluctuations in load demand [2]. To achieve a balance between power supply and demand, peak shaving in the power grid can be implemented through various methods [3]: (1) Increasing generation capacity: This involves augmenting the output of power generation equipment, such as operating backup generator units or initiating auxiliary power generation sites, to meet the electricity demand during peak periods; (2) Load adjustment: This entails reducing or delaying the operation of non-critical loads, such as adjustable loads in industrial production, to decrease overall electricity demand; (3) Energy storage systems: This entails utilizing energy storage devices like battery banks or pumped-storage systems to store excess electricity and release it during peak periods, effectively balancing power supply and demand.…”

Section: Introductionmentioning

confidence: 99%

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Non-Saturated 3E (Energy, Exergy, and Economic) Analysis of Carnot Battery Systems Based on Organic Rankine Cycle

Ma,

Yang

2023

J. Adv. Therm. Sci. Res.

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Artificial activities, environmental factors, and industrial production lead to periodic fluctuations in electricity consumption, necessitating peak-shaving measures to ensure efficient and stable operation of the power grid. The Carnot battery system represents an effective solution due to its high efficiency and convenience. In this paper, we propose a novel Carnot battery system based on a dual-function unit and establish thermodynamic and economic models. This paper proposed a simple reversible heat pump-organic Rankine cycle Carnot battery system, where a compression and expansion dual-function unit was developed to simplify the system and reduce investment costs. Subsequently, considering the unsaturated operating conditions that occur during practical operation, a comprehensive performance analysis of the system is conducted by varying pressure and temperature parameters. Afterward, an exergy analysis is performed on the proposed system to determine the exergy losses of its components for subsequent optimization. The results indicate that pressure drop has a detrimental effect on the system. When the pressure drop is 15 kPa, the system achieves a power-to-power ratio (P2P), levelized cost of storage (LCOS), and exergy efficiency of 27.57%, 0.66 $/kW∙h, and 62.8%. However, this also leads to increased exergy losses in the evaporator, resulting in decreased exergy efficiency. The evaporator exhibits the highest exergy loss, with a maximum loss of 21.16 kW among all components. Undercharging mode, the condenser shows the lowest exergy efficiency of 64.43%.

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Section: Model Validationmentioning

confidence: 60%

Section: Introductionmentioning

confidence: 99%

Non-Saturated 3E (Energy, Exergy, and Economic) Analysis of Carnot Battery Systems Based on Organic Rankine Cycle

Ma,

Yang

2023

J. Adv. Therm. Sci. Res.

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“…The flexible adaptation of traditional thermal power units for deep peak regulation can greatly enhance the adjustment capacity on the power side [3]. Existing studies have shown that deep peak shaving is one of the most effective ways to boost renewable energy consumption in the flexible transformation of thermal power units [4][5][6]. At present, there have been many studies on deep peak shaving of thermal power units.…”

Section: Introductionmentioning

confidence: 99%

A Distributionally Robust Optimization Strategy for a Wind–Photovoltaic Thermal Storage Power System Considering Deep Peak Load Balancing of Thermal Power Units

Zhang,

Zhu

2024

Processes

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With the continuous expansion of grid-connected wind, photovoltaic, and other renewable energy sources, their volatility and uncertainty pose significant challenges to system peak regulation. To enhance the system’s peak-load management and the integration of wind (WD) and photovoltaic (PV) power, this paper introduces a distributionally robust optimization scheduling strategy for a WD–PV thermal storage power system incorporating deep peak shaving. Firstly, a detailed peak shaving process model is developed for thermal power units, alongside a multi-energy coupling model for WD–PV thermal storage that accounts for carbon emissions. Secondly, to address the variability and uncertainty of WD–PV outputs, a data-driven, distributionally robust optimization scheduling model is formulated utilizing 1-norm and ∞-norm constrained scenario probability distribution fuzzy sets. Lastly, the model is solved iteratively through the column and constraint generation algorithm (C&CG). The outcomes demonstrate that the proposed strategy not only enhances the system’s peak-load handling and WD–PV integration but also boosts its economic efficiency and reduces the carbon emissions of the system, achieving a balance between model economy and system robustness.

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“…As one of the significant sources of carbon dioxide (CO 2 ) emissions, coal-fired power plants are confronted with great pressure to advance technological innovation and environmental protection . With the soaring growth in renewable energy capacity, coal-fired power plants are also deeply engaged in regulating their peaks on the grid and need to gradually reduce their share of power . For coal-fired power plants, long-term operation under low loads may lead to power reduction and equipment wear as well as a decrease in economic benefits.…”

Section: Introductionmentioning

confidence: 99%

Techno-Economic Analysis of a Hybrid System with Carbon Capture for Simultaneous Power Generation and Coal-to-Hydrogen Conversion

Zhang

Kang

Liu

2023

Ind. Eng. Chem. Res.

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Under the growing pressure of decarbonization across industrial sectors, power plants face great challenges in reducing carbon emissions. To improve energy efficiency and reduce the carbon emissions of thermal power plants, a hybrid system with carbon capture for simultaneous power generation and coal-to-hydrogen is proposed, which features comprehensive consideration of the energy demands of power plants and coal-to-hydrogen units. In the proposed system, the reduction of energy demand is realized by heat exchanger network synthesis (HENs) of the internal streams, and a carbon capture unit is then integrated for further reduction of carbon emissions. The techno-economic feasibility of the integrated system is analyzed and discussed by using energy consumption, economics, and emission reduction as major performance indexes. The results show that energy integration saves 108.2 MW of heat, while nearly 90% of carbon emissions are reduced for the system. When comparing the total energy consumption of the subsystems and a stand-alone carbon capture unit, the consumption for cooling and heating utilities in the integrated system is reduced by 8.81 and 9.11%, respectively. In addition, the total overnight cost and the annual operation cost using the proposed integrated system are reduced by 8.51 and 22.69%, respectively, and the cost of hydrogen production decreases by 5.99%. The economics of the integrated system is significantly affected by the market prices of coal and hydrogen. The integrated system has significant advantages in reducing energy consumption and carbon emissions with higher economic performance, which can provide guidance for the low-carbon transition of coal-fired power plants.

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The real cost of deep peak shaving for renewable energy accommodation in coal-fired power plants: Calculation framework and case study in China

Cited by 58 publications

References 9 publications

Non-Saturated 3E (Energy, Exergy, and Economic) Analysis of Carnot Battery Systems Based on Organic Rankine Cycle

Non-Saturated 3E (Energy, Exergy, and Economic) Analysis of Carnot Battery Systems Based on Organic Rankine Cycle

A Distributionally Robust Optimization Strategy for a Wind–Photovoltaic Thermal Storage Power System Considering Deep Peak Load Balancing of Thermal Power Units

Techno-Economic Analysis of a Hybrid System with Carbon Capture for Simultaneous Power Generation and Coal-to-Hydrogen Conversion

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