Open Access
ARTICLE
Gang Wang*, Yuedong Wu, Xiaoyi Qian, Yi Zhao
Energy Engineering, DOI:10.32604/ee.2024.052268
Abstract A robust scheduling optimization method for wind–fire storage system distribution based on the mixed carbon trading mechanism is proposed to improve the rationality of carbon emission quota allocation while reducing the instability of large-scale wind power access systems. A hybrid carbon trading mechanism that combines short-term and long-term carbon trading is constructed, and a fuzzy set based on Wasserstein measurement is proposed to address the uncertainty of wind power access. Moreover, a robust scheduling optimization method for wind–fire storage systems is formed. Results of the multi scenario comparative analysis of practical cases show that the More >
Open Access
ARTICLE
Ying Wang1, Jie Dang1, Cangbi Ding2,*, Chenyi Zheng2, Yi Tang2
Energy Engineering, DOI:10.32604/ee.2024.052066
Abstract As the large-scale development of wind farms (WFs) progresses, the connection of WFs to the regional power grid is evolving from the conventional receiving power grid to the sending power grid with a high proportion of wind power (WP). Due to the randomness of WP output, higher requirements are put forward for the voltage stability of each node of the regional power grid, and various reactive power compensation devices (RPCDs) need to be rationally configured to meet the stable operation requirements of the system. This paper proposes an optimal configuration method for multi-type RPCDs in More >
Open Access
ARTICLE
Yue He1, Yaxiong You1, Zhian He1, Haiying Lu1, Lei Chen2,*, Yuqi Jiang2, Hongkun Chen2
Energy Engineering, DOI:10.32604/ee.2024.052371
Abstract In recent times, the impact of typhoon disasters on integrated energy active distribution networks (IEADNs) has
received increasing attention, particularly, in terms of effective cascading fault path prediction and enhanced fault
recovery performance. In this study, we propose a modified ORNL-PSerc-Alaska (OPA) model based on optimal
power flow (OPF) calculation to forecast IEADN cascading fault paths. We first established the topology and
operational model of the IEADNs, and the typical fault scenario was chosen according to the component fault
probability and information entropy. The modified OPA model consisted of two layers: An upper-layer model to More >
Open Access
ARTICLE
Junhui Li1, Yuqing Zhang1, Can Chen2, Xiaoxiao Wang2, Yinchi Shao2, Xingxu Zhu1, Cuiping Li1,*
Energy Engineering, DOI:10.32604/ee.2024.050239
Abstract Aiming at the consumption problems caused by the high proportion of renewable energy being connected to the
distribution network, it also aims to improve the power supply reliability of the power system and reduce the
operating costs of the power system. This paper proposes a two-stage planning method for distributed
generation and energy storage systems that considers the hierarchical partitioning of source-storage-load.
Firstly, an electrical distance structural index that comprehensively considers active power output and reactive
power output is proposed to divide the distributed generation voltage regulation domain and determine the
access location and number… More >
Open Access
ARTICLE
Kaicheng Liu1,3, Chen Liang2, Naiyue Wu1,3, Xiaoyang Dong2, Hui Yu1,*
Energy Engineering, DOI:10.32604/ee.2024.050001
Abstract This paper presents a novel approach to economic dispatch in smart grids equipped with diverse energy devices. This method integrates features including photovoltaic (PV) systems, energy storage coupling, varied energy roles, and energy supply and demand dynamics. The system model is developed by considering energy devices as versatile units capable of fulfilling various functionalities and playing multiple roles simultaneously. To strike a balance between optimality and feasibility, renewable energy resources are modeled with considerations for forecasting errors, Gaussian distribution, and penalty factors. Furthermore, this study introduces a distributed event-triggered surplus algorithm designed to address the More >
Open Access
ARTICLE
Mingxuan Chen1, Jun Jia2, Baoping Zhang1, Leiyan Han3, Mengbo Ji3,4, Zhangtao Yu1, Dongfang Li1, Wenyong Wang1, Hongjing Jia1, Huachi Xu2,*
Energy Engineering, DOI:10.32604/ee.2024.051524
Abstract The rise in hydrogen production powered by renewable energy is driving the field toward the adoption of systems comprising multiple alkaline water electrolyzers. These setups present various operational modes: independent operation and multi-electrolyzer parallelization, each with distinct advantages and challenges. This study introduces an innovative configuration that incorporates a mutual lye mixer among electrolyzers, establishing a weakly coupled system that combines the advantages of two modes. This approach enables efficient heat utilization for faster hot-startup and maintains heat conservation post-lye interconnection, while preserving the option for independent operation after decoupling. A specialized thermal exchange model… More >
Open Access
ARTICLE
Suogui Shang1, Kechao Gao1, Qingbin Wang1, Xinghua Zhang1, Pengli Zhou2,3,*, Jianhua Li2,3, Peng Chu2,3
Energy Engineering, DOI:10.32604/ee.2024.050094
（This article belongs to the Special Issue: Hydraulic Fracturing Theory and Application for Geo-energy Development)
Abstract Hydraulic fracturing is a mature and effective method for deep oil and gas production, which provides a foundation for deep oil and gas production. One of the key aspects of implementing hydraulic fracturing technology lies in understanding mechanics response characteristics of rocks in deep reservoirs under complex stress conditions. In this work, based on outcrop core samples, high-stress triaxial compression tests were designed to simulate the rock mechanics behavior of deep reservoirs in Bozhong Sag. Additionally, this study analyzes the deformation and damage law for rock under different stress conditions. Wherein, with a particular focus… More >
Open Access
ARTICLE
Benxin Li*, Xuanming Chang
Energy Engineering, DOI:10.32604/ee.2024.051332
Abstract The increasingly large number of electric vehicles (EVs) has resulted in a growing concern for EV charging station load prediction for the purpose of comprehensively evaluating the influence of the charging load on distribution networks. To address this issue, an EV charging station load prediction method is proposed in coupled urban transportation and distribution networks. Firstly, a finer dynamic urban transportation network model is formulated considering both nodal and path resistance. Then, a finer EV power consumption model is proposed by considering the influence of traffic congestion and ambient temperature. Thirdly, the Monte Carlo method… More >
Open Access
ARTICLE
Miao Li, Fanyong Cheng*, Jiong Yang, Maxwell Mensah Duodu, Hao Tu
Energy Engineering, DOI:10.32604/ee.2024.051231
（This article belongs to the Special Issue: Advanced Modelling, Operation, Management and Diagnosis of Lithium Batteries)
Abstract Accurate and reliable fault detection is essential for the safe operation of electric vehicles. Support vector data description (SVDD) has been widely used in the field of fault detection. However, constructing the hypersphere boundary only describes the distribution of unlabeled samples, while the distribution of faulty samples cannot be effectively described and easily misses detecting faulty data due to the imbalance of sample distribution. Meanwhile, selecting parameters is critical to the detection performance, and empirical parameterization is generally time-consuming and laborious and may not result in finding the optimal parameters. Therefore, this paper proposes a… More >
Open Access
ARTICLE
Feng Zhao, Xiaotong Zhu*, Xiaoqiang Chen, Ying Wang
Energy Engineering, DOI:10.32604/ee.2024.049762
Abstract In order to fully utilize the regenerative braking energy of metro trains and stabilize the metro DC traction busbar voltage, a hybrid regenerative braking energy recovery system with a dual-mode power management strategy is proposed. Firstly, the construction of the hybrid regenerative braking energy recovery system is explained. Then, based on the power demand of low-voltage load in metro stations, a dual-mode power management strategy is proposed to allocate the reference power of each system according to the different working conditions, and the control methods of each system are set. Finally, the correctness and effectiveness More >
Open Access
ARTICLE
Mingguan Zhao1,4, Lida Liao2,*, Penglong Liang1, Meng Li1, Xinsheng Dong1, Yang Yang1, Hongxia Wang1, Zhenhao Zhang3
Energy Engineering, DOI:10.32604/ee.2024.048261
Abstract The rapid growth of distributed renewable energy penetration is promoting the evolution of the energy system toward decentralization and decentralized and digitized smart grids. This study was based on energy blockchain, and developed a dual-biding mechanism based on the real-time energy surplus and demand in the local smart grid, which is expected to enable reliable, affordable, and clean energy supply in smart communities. In the proposed system, economic benefits could be achieved by replacing fossil-fuel-based electricity with the high penetration of affordable solar PV electricity. The reduction of energy surplus realized by distributed energy production More >
Open Access
ARTICLE
Zhifeng Zhao, Xuelong Miao*, Xu Chen, Jinbao Zheng, Yage Di, Zhenjie Bao, Zhuo Yang
Energy Engineering, DOI:10.32604/ee.2024.051237
Abstract Ammonia-diesel dual fuel (ADDF) engines for transportation applications are an important way to reduce carbon
emissions. In order to achieve better combustion of ammonia in diesel engines. A small-bore single-cylinder engine
was converted into an ADDF engine with the help of mature computational fluid dynamics (CFD) simulation
software to investigate the performance of an engine with a high ammonia energy ratio (AER), and to study the
effect of spray tilt angle on ADDF engine. The results showed that the increase in AER reduced nitric oxide (NO)
and nitrogen dioxide (NO2) emissions but increased nitrous oxide (N2O)… More >
Open Access
ARTICLE
Qin Qian1, Mingjing Lu1,2,*, Anhai Zhong1, Feng Yang1, Wenjun He1, Min Li1
Energy Engineering, DOI:10.32604/ee.2024.049430
（This article belongs to the Special Issue: Integrated Geology-Engineering Simulation and Optimizationfor Unconventional Oil and Gas Reservoirs)
Abstract The production capacity of shale oil reservoirs after hydraulic fracturing is influenced by a complex interplay involving geological characteristics, engineering quality, and well conditions. These relationships, nonlinear in nature, pose challenges for accurate description through physical models. While field data provides insights into real-world effects, its limited volume and quality restrict its utility. Complementing this, numerical simulation models offer effective support. To harness the strengths of both data-driven and model-driven approaches, this study established a shale oil production capacity prediction model based on a machine learning combination model. Leveraging fracturing development data from 236 wells… More >
Open Access
ARTICLE
He Li1, Xianchao Liu2,*, Jidong Li1, Yuchen Qiu2
Energy Engineering, DOI:10.32604/ee.2024.048752
（This article belongs to the Special Issue: Wind Energy Development and Utilization)
Abstract When employing stepwise inertial control (SIC), wind power generation can offer significant frequency support to the power system, concurrently mitigating energy shortages and suppressing secondary frequency drop. Nonetheless, further investigation is imperative for implementing stepped inertia control due to variations in frequency regulation capabilities and operational safety among diverse wind farm groups. Consequently, this paper advocates a multi-wind farm ladder timing SIC method designed to alleviate secondary drops in system frequency. Initially, the paper introduces the fundamental principles of stepped inertia control for a doubly-fed induction generator (DFIG) and deduces the relationship between support energy,… More >
Open Access
ARTICLE
Liqiong Chen1, Kui Zhao1, Kai Zhang1,*, Duo Xv1, Hongxvan Hu2, Guoguang Ma1, Wenwen Zhan3
Energy Engineering, DOI:10.32604/ee.2024.049362
（This article belongs to the Special Issue: Integrated Geology-Engineering Simulation and Optimizationfor Unconventional Oil and Gas Reservoirs)
Abstract The leakage gas from a buried natural gas pipelines has the great potential to cause economic losses and environmental pollution owing to the complexity of the mountainous environment. In this study, computational fluid dynamics (CFD) method was applied to investigate the diffusion law and hazard range of buried natural gas pipeline leakage in mountainous environment. Based on cloud chart, concentration at the monitoring site and hazard range of lower explosion limit (LEL) and upper explosion limit (UEL), the influences of leakage hole direction and shape, soil property, burial depth, obstacle type on the diffusion law… More >
Open Access
ARTICLE
He Wang, Xingyu Tong, Huanan Yu*, Xiao Hu, Jing Bian
Energy Engineering, DOI:10.32604/ee.2024.050594
Abstract Cyber-physical power system (CPPS) has significantly improved the operational efficiency of power systems.
However, cross-space cascading failures may occur due to the coupling characteristics, which poses a great threat
to the safety and reliability of CPPS, and there is an acute need to reduce the probability of these failures. Towards
this end, this paper first proposes a cascading failure index to identify and quantify the importance of different
information in the same class of communication services. On this basis, a joint improved risk-balanced service
function chain routing strategy (SFC-RS) is proposed, which is modeled as More >
Open Access
EDITORIAL
Bo Yang1,*, Yucun Qian1, Jianzhong Xu2, Yaxing Ren3, Yixuan Chen4
Energy Engineering, DOI:10.32604/ee.2024.050083
（This article belongs to the Special Issue: Advanced Modelling, Operation, Management and Diagnosis of Lithium Batteries)
Abstract This article has no abstract. More >
Open Access
ARTICLE
Shan Liu1, Chengbin Chi1, Fengze Han2, Yanan Wu1, Lin Zhu1, Tuo Wang2,*
Energy Engineering, DOI:10.32604/ee.2024.049861
Abstract Voltage source converter based high voltage direct current (VSC-HVDC) can participate in voltage regulation by flexible control to help maintain the voltage stability of the power grid. In order to quantitatively evaluate its influence on the voltage interaction between VSC-HVDC and line commutated converter based high voltage direct current (LCC-HVDC), this paper proposes a hybrid multi-infeed interaction factor (HMIIF) calculation method considering the voltage regulation control characteristics of VSC-HVDC. Firstly, for a hybrid multi-infeed high voltage direct current system, an additional equivalent operating admittance matrix is constructed to characterize HVDC equipment characteristics under small disturbance.… More >
Open Access
ARTICLE
Chia-Nan Wang, Thuy-Duong Thi Pham*, Nhat-Luong Nhieu
Energy Engineering, DOI:10.32604/ee.2024.050224
（This article belongs to the Special Issue: Advances in Geothermal Energy)
Abstract Geothermal energy is considered a renewable, environmentally friendly, especially carbon-free, sustainable energy source that can solve the problem of climate change. In general, countries with geothermal energy resources are the ones going through the ring of fire. Therefore, not every country is lucky enough to own this resource. As a country with 117 active volcanoes and within the world’s ring of fire, it is a country whose geothermal resources are estimated to be about 40% of the world’s geothermal energy potential. However, the percentage used compared to the geothermal potential is too small. Therefore, this… More >
Open Access
ARTICLE
Tiezhou Wu, Yukan Zhang*
Energy Engineering, DOI:10.32604/ee.2024.049883
（This article belongs to the Special Issue: Advanced Modelling, Operation, Management and Diagnosis of Lithium Batteries)
Abstract In order to solve the problem of inconsistent energy in the charging and discharging cycles of lithium-ion battery
packs, a new multilayer equilibrium topology is designed in this paper. The structure adopts a hierarchical
structure design, which includes intra-group equilibrium, primary inter-group equilibrium and secondary intergroup equilibrium. This structure greatly increases the number of equilibrium paths for lithium-ion batteries, thus
shortening the time required for equilibrium, and improving the overall efficiency. In terms of control strategy,
fuzzy logic control (FLC) is chosen to control the size of the equilibrium current during the equilibrium process.
We… More >
Open Access
ARTICLE
Shaokun Liu1, Zhiying Gao1,2,*, Rina Su1,2, Mengmeng Yan1, Jianwen Wang1,2
Energy Engineering, DOI:10.32604/ee.2024.049616
Abstract Although the aerodynamic loading of wind turbine blades under various conditions has been widely studied, the radial distribution of load along the blade under various yaw conditions and with blade flapping phenomena is poorly understood. This study aims to investigate the effects of second-order flapwise vibration on the mean and fluctuation characteristics of the torque and axial thrust of wind turbines under yaw conditions using computational fluid dynamics (CFD). In the CFD model, the blades are segmented radially to comprehensively analyze the distribution patterns of torque, axial load, and tangential load. The following results are… More >
Open Access
ARTICLE
Yirui Li1, Dongliang Xiao1,3,*, Haoyong Chen1, Weijun Cai1, Josue Campos do Prado2
Energy Engineering, DOI:10.32604/ee.2024.049232
（This article belongs to the Special Issue: Wind Energy Development and Utilization)
Abstract Currently, both regulated and deregulated power trading exist in China’s power system, which has caused imbalanced funds in the electricity market. In this paper, a simulation analysis of the electricity market with wind energy resources is conducted, and the calculation methods of unbalanced funds are investigated systematically. In detail, the calculation formulas of unbalanced funds are illustrated based on their definition, and a two-track electricity market clearing model is established. Firstly, the concept of the dual-track system is explained, and the specific calculation formulas of various types of unbalanced funds are provided. Next, considering the More >
Open Access
ARTICLE
Hao Bai1, Beiyuan Liu2,*, Hongwen Liu3, Jupeng Zeng2, Jian Ouyang4, Yipeng Liu1
Energy Engineering, DOI:10.32604/ee.2024.049848
Abstract Most ground faults in distribution network are caused by insulation deterioration of power equipment. It is difficult to find the insulation deterioration of the distribution network in time, and the development trend of the initial insulation fault is unknown, which brings difficulties to the distribution inspection. In order to solve the above problems, a situational awareness method of the initial insulation fault of the distribution network based on a multi-feature index comprehensive evaluation is proposed. Firstly, the insulation situation evaluation index is selected by analyzing the insulation fault mechanism of the distribution network, and the… More >
Open Access
REVIEW
Bo Yang1,2, Rui Xie1, Zhengxun Guo3,4,*
Energy Engineering, DOI:10.32604/ee.2024.049423
Abstract Maximum power point tracking (MPPT) technology plays a key role in improving the energy conversion efficiency of photovoltaic (PV) systems, especially when multiple local maximum power points (LMPPs) occur under partial shading conditions (PSC). It is necessary to modify the operating point efficiently and accurately with the help of MPPT technology to maximize the collected power. Even though a lot of research has been carried out and impressive progress achieved for MPPT technology, it still faces some challenges and dilemmas. Firstly, the mathematical model established for PV cells is not precise enough. Second, the existing… More >
Open Access
ARTICLE
Zeyi Wang1, Mingxi Jiao1, Daliang Wang1, Minxu Liu1, Minglei Jiang2, He Wang3, Shiqiang Li3,*
Energy Engineering, DOI:10.32604/ee.2024.028223
Abstract This paper addresses the problem of complex and challenging disturbance localization in the current power system operation environment by proposing a disturbance localization method for power systems based on group sparse representation and entropy weight method. Three different electrical quantities are selected as observations in the compressed sensing algorithm. The entropy weighting method is employed to calculate the weights of different observations based on their relative disturbance levels. Subsequently, by leveraging the topological information of the power system and pre-designing an overcomplete dictionary of disturbances based on the corresponding system parameter variations caused by disturbances,… More >
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