Open Access
ARTICLE
Wei Wang1, Qingzhu Shao1, Shaoliang Wang2,*, Yiwei Zhao2, Yuanbo Ye1, Duanchao Li1, Mengyu Wu2
Energy Engineering, DOI:10.32604/ee.2024.051409
Abstract Aiming at the problem that the traditional short-circuit current calculation method is not applicable to Distributed Generation (DG) accessing the distribution network, the paper proposes a short-circuit current partitioning calculation method considering the degree of voltage drop at the grid-connected point of DG. Firstly, the output characteristics of DG in the process of low voltage ride through are analyzed, and the equivalent output model of DG in the fault state is obtained. Secondly, by studying the network voltage distribution law after fault in distribution networks under different DG penetration rates, the degree of voltage drop… More >
Open Access
ARTICLE
Qiang Liu1, Rujun Wang1, Yintao Zhang1, Chong Sun1, Meichun Yang1, Yuliang Su2,*, Wendong Wang2, Ying Shi2, Zheng Chen2
Energy Engineering, DOI:10.32604/ee.2024.052007
（This article belongs to the Special Issue: Integrated Geology-Engineering Simulation and Optimizationfor Unconventional Oil and Gas Reservoirs)
Abstract Deep condensate gas reservoirs exhibit highly complex and variable phase behaviors, making it crucial to understand the relationship between fluid phase states and flow patterns. This study conducts a comprehensive analysis of the actual production process of the deep condensate gas well A1 in a certain oilfield in China. Combining phase behavior analysis and CMG software simulations, the study systematically investigates phase transitions, viscosity, and density changes in the gas and liquid phases under different pressure conditions, with a reservoir temperature of 165°C. The research covers three crucial depletion stages of the reservoir: single-phase flow,… More >
Open Access
ARTICLE
Jie Ma1, Tong Zhao2, Yuanzhao Hao3, Wenwen Qin2, Haozheng Yu1, Mingxuan Du2, Yuanhong Liu4, Liang Zhang2, Shixia Mu5, Cuiping Li2, Junhui Li2,*
Energy Engineering, DOI:10.32604/ee.2024.051244
Abstract After the integration of large-scale Distributed Generation (DG) into the distribution network, the randomness and volatility of its output result in a reduction of spatiotemporal alignment between power generation and demand in the distribution network, exacerbating the phenomenon of wind and solar power wastage. As a novel power system model, the fundamental concept of Regional Autonomous Power Grids (RAPGs) is to achieve localized management and energy autonomy, thereby facilitating the effective consumption of DGs. Therefore, this paper proposes a distributed resource planning strategy that enhances the autonomy capabilities of regional power grids by considering multiple… More >
Open Access
ARTICLE
Cuiping Li1, Kunqi Gao1, Can Chen2, Junhui Li1,*, Xiaoxiao Wang2, Yinchi Shao2, Xingxu Zhu1
Energy Engineering, DOI:10.32604/ee.2024.052167
Abstract In recent years, distributed photovoltaics (DPV) has ushered in a good development situation due to the advantages of pollution-free power generation, full utilization of the ground or roof of the installation site, and balancing a large number of loads nearby. However, under the background of a large-scale DPV grid-connected to the county distribution network, an effective analysis method is needed to analyze its impact on the voltage of the distribution network in the early development stage of DPV. Therefore, a DPV orderly grid-connected method based on photovoltaics grid-connected order degree (PGOD) is proposed. This method… More >
Open Access
ARTICLE
Jianhua Zhang1,2, Wen Sun3, Zhijun Li1,*
Energy Engineering, DOI:10.32604/ee.2024.051093
Abstract Two types of tightly coupled Selective Catalytic Reduction (SCR) mixers were designed in this study, namely Mixer 1 integrated with an SCR catalyst and Mixer 2 arranged separately. Computational Fluid Dynamics (CFD) software was utilized to model the gas flow, spraying, and pyrolysis reaction of the aqueous urea solution in the tightly coupled SCR system. The parameters of gas flow velocity uniformity and ammonia distribution uniformity were simulated and calculated for both Mixer 1 and Mixer 2 in the tightly coupled SCR system to compare their advantages and disadvantages. The simulation results indicated that Mixer… More >
Open Access
ARTICLE
Wentao Li1, Jiantao Liu2, Yudun Li3, Guoxin Ming1, Kaifeng Zhang1, Kun Yuan1,*
Energy Engineering, DOI:10.32604/ee.2024.050852
Abstract With the large-scale development and utilization of renewable energy, industrial flexible loads, as a kind of load-side resource with strong regulation ability, provide new opportunities for the research on renewable energy consumption problem in power systems. This paper proposes a two-layer active power optimization model based on industrial flexible loads for power grid partitioning, aiming at improving the line over-limit problem caused by renewable energy consumption in power grids with high proportion of renewable energy, and achieving the safe, stable and economical operation of power grids. Firstly, according to the evaluation index of renewable energy… More >
Open Access
ARTICLE
Haichen Li1,2, Jianghai Li1, Li Li3,4,*, Zhandong Li5,*
Energy Engineering, DOI:10.32604/ee.2024.050771
（This article belongs to the Special Issue: Carbon Reduction and Optimized Recovery Strategies for Unconventional Resource)
Abstract The turbidite channel of South China Sea has been highly concerned. Influenced by the complex fault and the rapid phase change of lithofacies, predicting the channel through conventional seismic attributes is not accurate enough. In response to this disadvantage, this study used a method combining grey relational analysis (GRA) and support vector machine (SVM) and established a set of prediction technical procedures suitable for reservoirs with complex geological conditions. In the case study of the Huangliu Formation in Qiongdongnan Basin, South China Sea, this study first dimensionalized the conventional seismic attributes of Gas Layer Group… More >
Open Access
ARTICLE
Jiachang Liu1,*, Zhengwei Huang2, Junfeng Xiang1, Lu Liu1, Manlin Hu1
Energy Engineering, DOI:10.32604/ee.2024.054514
Abstract To enhance the refinement of load decomposition in power systems and fully leverage seasonal change information to further improve prediction performance, this paper proposes a seasonal short-term load combination prediction model based on modal decomposition and a feature-fusion multi-algorithm hybrid neural network model. Specifically, the characteristics of load components are analyzed for different seasons, and the corresponding models are established. First, the improved complete ensemble empirical modal decomposition with adaptive noise (ICEEMDAN) method is employed to decompose the system load for all four seasons, and the new sequence is obtained through reconstruction based on the… More >
Open Access
ARTICLE
Yujin Liu1, Zhenkai Zhang1, Li Ma1, Yan Jia1,2,*, Weihua Yin3, Zhifeng Liu3
Energy Engineering, DOI:10.32604/ee.2024.052594
Abstract Accurate short-term photovoltaic (PV) power prediction helps to improve the economic efficiency of power stations and is of great significance to the arrangement of grid scheduling plans. In order to improve the accuracy of PV power prediction further, this paper proposes a data cleaning method combining density clustering and support vector machine. It constructs a short-term PV power prediction model based on particle swarm optimization (PSO) optimized Long Short-Term Memory (LSTM) network. Firstly, the input features are determined using Pearson’s correlation coefficient. The feature information is clustered using density-based spatial clustering of applications with noise More >
Open Access
ARTICLE
Juan Li1, Tingting Xu1,*, Yi Gu2, Chuang Liu1, Guiping Zhou2, Guoliang Bian1
Energy Engineering, DOI:10.32604/ee.2024.052331
Abstract In fossil energy pollution is serious and the “double carbon” goal is being promoted, as a symbol of fresh energy in the electrical system, solar and wind power have an increasing installed capacity, only conventional units obviously can not solve the new energy as the main body of the scheduling problem. To enhance the system scheduling ability, based on the participation of thermal power units, incorporate the high energy-carrying load of electro-melting magnesium into the regulation object, and consider the effects on the wind unpredictability of the power. Firstly, the operating characteristics of high energy… More >
Open Access
ARTICLE
Xinglong Chen, Ximin Cao*, Qifan Huang, He Huang
Energy Engineering, DOI:10.32604/ee.2024.053464
Abstract To better reduce the carbon emissions of a park-integrated energy system (PIES), optimize the comprehensive operating cost, and smooth the load curve, a source-load flexible response model based on the comprehensive evaluation index is proposed. Firstly, a source-load flexible response model is proposed under the stepped carbon trading mechanism; the organic Rankine cycle is introduced into the source-side to construct a flexible response model with traditional combined heat and power (CHP)
unit and electric boiler to realize the flexible response of CHP to load; and the load-side categorizes loads into transferable, interruptible, and substitutable loads… More >
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
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
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 >
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