International Journal of Electrical Power & Energy Systems最新文献

{"title":"Enhanced dynamic support strategies of grid-forming-PMSG based on DC-voltagesynchronization: Frequency and Q support perspective","authors":"Dejian Yang ,&nbsp;Tongyu Hu ,&nbsp;Taiying Zheng ,&nbsp;Minhui Qian ,&nbsp;Chaoquan Li ,&nbsp;Zhijie Cao ,&nbsp;Gangui Yan","doi":"10.1016/j.ijepes.2025.110745","DOIUrl":"10.1016/j.ijepes.2025.110745","url":null,"abstract":"<div><div>The DC-Voltage Synchronization based Grid-Forming PMSG has voltage source characteristics, e.g. frequency and reactive power support function, however, the support capability is limited, and the regulation potential is not fully utilized. This paper suggests the enhanced dynamic support strategies of DC-voltage synchronization-based grid-forming PMSG from perspective: frequency and reactive power support. To this end, firstly, the inertia synchronization and autonomous voltage support mechanism of grid-forming wind turbine (WT) with DC capacitor voltage synchronization are analyzed. Secondly, the fast frequency support (FFS) and voltage support method for DC-voltage synchronization-based grid-forming PMSG are proposed with additional control loops. With the help of rotor motion equation and power flow equation, the influence characteristics of FFS of DC-voltage synchronization-based grid-forming PMSG on frequency stability and reactive power regulation strategy on transient voltage stability are revealed. Then, the small signal model of MSC and GSC is constructed, and the change trend of root trajectory is observed with the help of state space model, and the boundary of the proposed strategy parameters is determined. Finally, based on PSCAD/EMTDC, the frequency and voltage support abilities of DC-voltage synchronization-based grid-forming PMSG to power grid are verified. Simulations indicate that the suggested additional frequency support loop and voltage support loop could effectively increase dynamic performance of DC-voltage synchronization-based grid-forming PMSG.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"169 ","pages":"Article 110745"},"PeriodicalIF":5.0,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modified hard-constrained PINNs for physically consistent microgrid transient response modeling","authors":"Likun Chen ,&nbsp;Yifan Wang ,&nbsp;Wei Sun ,&nbsp;Lei Shang ,&nbsp;Xuzhu Dong ,&nbsp;Bo Wang","doi":"10.1016/j.ijepes.2025.110726","DOIUrl":"10.1016/j.ijepes.2025.110726","url":null,"abstract":"<div><div>Accurate dynamic equivalence modeling of microgrids is critical for distribution system operators, yet existing methods face trade-offs between physical consistency and scalability in high-dimensional parameter spaces. This work proposes a physically consistent parameter tuning paradigm for microgrid transient equivalence modeling, where the grey-box model structure serves as prior physical knowledge, and the hard-constrained PINN enables automated discovery of high-dimensional parameters under nonlinear dynamics. Compared to conventional ’structure-first’ grey-box model for transient response analysis, our approach unifies physics fidelity with data-driven adaptability, achieves a new balance between interpretability and generalization in microgrid equivalent modeling. The key innovation lies in the implementation of physically consistent parameter tuning for microgrid transient analysis, where the hard-constrained PINN acts as a differentiable simulator to navigate high-dimensional spaces while strictly adhering to dynamic ordinary differential equations (ODEs). The paradigm eliminates conventional manual tuning problems through gradient-aware exploration of non-convex landscapes, resolving the trade-off between fidelity and measurement noise adaptation. Experimental validation on a real-time digital simulation (RTDS) control-hardware-in-loop (CHIL) platform demonstrates that the PINN-based parameters improve dynamic response accuracy and reduce error margins compared to traditional methods.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"169 ","pages":"Article 110726"},"PeriodicalIF":5.0,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Distributed low-carbon economic dispatch of interconnected multi-area system with CCS-ESS","authors":"Junhui Li ,&nbsp;Yan Shao ,&nbsp;Gang Mu ,&nbsp;Xingxu Zhu ,&nbsp;Gangui Yan ,&nbsp;Cuiping Li","doi":"10.1016/j.ijepes.2025.110742","DOIUrl":"10.1016/j.ijepes.2025.110742","url":null,"abstract":"<div><div>In an interconnected multi-area system, there is a problem of losing carbon capture intensity when the traditional carbon-capture-power-plants (CCPP) release flexibility to assist renewable energy consumption. This paper proposes a distributed real-time low-carbon economic dispatch with a cooperative operation model of carbon-capture-and-storage (CCS) and energy-storage-system (ESS). First, to ensure the carbon capture intensity of CCS, the electric carbon in the CCPP is decoupled, and the net output of the power plant is no longer coupled with the energy consumption of the carbon capture device. Second, the cooperative operation model for CCS and ESS (CCS-ESS) is constructed, which can make reasonable action responses according to the actual operation of the system. Third, to achieve distributed economic dispatch optimization completely and accurately, a real-time distributed iterative solution framework is designed. Case studies indicate the revenue of the CCS under the cooperative mode is improved by up to 24.18 % and 7.49 % compared with the individual mode without and with the ESS. Further, the solution quality and Plug-and-Play (PNP) of the proposed methods are verified.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"169 ","pages":"Article 110742"},"PeriodicalIF":5.0,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144069044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modelling of spatially correlated weather-based electricity forecasting using combined frequency-based signal decomposition with optimized boosting approach","authors":"Indra A. Aditya ,&nbsp;Didit Adytia","doi":"10.1016/j.ijepes.2025.110698","DOIUrl":"10.1016/j.ijepes.2025.110698","url":null,"abstract":"<div><div>Effective planning of electric energy systems is becoming increasingly vital due to the growing integration of renewable resources and the electrification of end-user industries. However, short-term electrical load forecasting continues to be challenging due to the effects of weather unpredictability and consumer behaviour. This research presents a machine learning-driven forecasting framework that incorporates spatially correlated meteorological data, temporal characteristics, and frequency-based signal decomposition using the Fourier Transform. The primary contribution is a spatially correlation-driven feature selection technique to choose ideal weather input sites, coupled with the extraction of predominant frequency components from the load signal to enhance model input. Three machine learning models are evaluated: XGBoost, AdaBoost, and Multi-Layer Perceptron (MLP) on datasets from two locations in Indonesia: Bali and Jakarta-Banten. XGBoost attained optimal performance with the five most frequent components. For Bali, the model produced an <span><math><msup><mrow><mi>R</mi></mrow><mrow><mn>2</mn></mrow></msup></math></span> of 0.89, a correlation coefficient (CC) of 0.98, and a root mean square error (RMSE) of 37.83; for Jakarta-Banten, it gave an <span><math><msup><mrow><mi>R</mi></mrow><mrow><mn>2</mn></mrow></msup></math></span> of 0.90, a CC of 0.95, and an RMSE of 497.99. These findings underscore the advantages of integrating spatial weather relevance with signal decomposition to improve prediction accuracy, which is essential for reliable and efficient power system operations.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"169 ","pages":"Article 110698"},"PeriodicalIF":5.0,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Joint optimization of location and topology of multi-terminal soft open point in distribution networks","authors":"Haibo Zhou ,&nbsp;Guojiang Xiong ,&nbsp;Xiaofan Fu ,&nbsp;Man-Chung Wong ,&nbsp;Louis-A. Dessaint ,&nbsp;Kamal Al-Haddad","doi":"10.1016/j.ijepes.2025.110721","DOIUrl":"10.1016/j.ijepes.2025.110721","url":null,"abstract":"<div><div>The popularization of renewable energy has led to problems including excessive current and voltage violations in distribution networks. Soft open point (SOP) enables real-time continuous active and reactive power regulation to alleviate these problems. However, how many terminals of a SOP should be set, and which feeders should be interconnected with these terminals is a crucial issue. To address this issue and fully utilize the performance of SOP, this paper conducts a comparative study of SOP with different topologies. First, a nonlinear programming (NLP) model to reveal the effect of multi-terminal SOP (MTSOP) in minimizing system losses and voltage deviation is developed. Second, to facilitate the solution, the NLP model is transformed into a second-order cone programming (SOCP) model based on cone relaxation. Finally, validation on the IEEE 33-, 69- and 141-node systems is conducted. MTSOP can reduce the total losses of IEEE 33-, 69- and 141-node systems by up to 23.54 %, 37.98 %, and 28.90 %, respectively. Although SOPs with a large number of terminals have excellent performance, they are difficult to gain an advantage in feasibility. Therefore, it is not necessarily better to have more terminals in an MTSOP which should be determined based on the characteristics of distribution networks.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"169 ","pages":"Article 110721"},"PeriodicalIF":5.0,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stability and mutual effect analysis of the virtual synchronous generator based interconnected AC/DC systems","authors":"Fengting Wei,&nbsp;Xiuli Wang,&nbsp;Haitao Zhang,&nbsp;Bangyan Wang,&nbsp;Boyang Zhao,&nbsp;Xifan Wang","doi":"10.1016/j.ijepes.2025.110705","DOIUrl":"10.1016/j.ijepes.2025.110705","url":null,"abstract":"<div><div>Virtual synchronous generators (VSGs) are widely utilized in the integration of renewable resources, and the VSG-related small-signal stability is extensively discussed. However, the mutual effect of the AC and DC subsystems on the overall stability of VSG-based interconnected systems is rarely taken into consideration. To address this issue, the hybrid admittance of the VSG containing the AC and DC dynamics is established to capture its coupling characteristics. On this basis, the impedance-based method and determinant properties are introduced to analyze system stability. By defining a relative gain matrix and utilizing the segment amplification and minification, it is theoretically demonstrated that for the interconnecting VSG, the association strength between the mutual effect and system stability experiences a notable reduction as the frequency increases. Specifically, the mutual effect between the AC and DC subsystems of the VSG-based interconnected AC/DC systems can be totally neglected within medium- and high-frequency range. To elucidate further, the stability of the AC and DC subsystems can be investigated independently under this condition, facilitating the model order reduction and stability analysis of the large-scale converter-integrated power systems. Finally, the presented theoretical derivation and analytical expressions are validated through the time-domain and frequency-domain simulations.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"169 ","pages":"Article 110705"},"PeriodicalIF":5.0,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring cascading failure in directed weighted small-world network: An adaptive SIRS-F mechanism","authors":"Wenjie Tian ,&nbsp;Jihui Xu ,&nbsp;Chuhan Zhou ,&nbsp;Lu Chen ,&nbsp;Xingqi Zou","doi":"10.1016/j.ijepes.2025.110697","DOIUrl":"10.1016/j.ijepes.2025.110697","url":null,"abstract":"<div><div>Cascading failures in complex networks is a significant threat to system reliability and robustness, influencing various aspects of daily life. The small-world characteristics within complex networks contribute to increased complexity, making it challenging to predict the cascading failure due to the relationships and interaction among nodes. We assume that both node attacked and mutation can trigger cascading failure, and propose an adaptive SIRS-F mechanism based on load-capacity model and SIRS model to explore cascading failures in directed weighted small-world networks. In our mechanism, node loads continuously change due to a flow redistribution strategy, while parameters such as the infected rate and recovery rate of nodes adaptively vary. Through simulation, it was found that, compared to the SIRS model and the load capacity model, the cascading failure effects in directed weighted small-world networks under proposed mechanism align more closely with the ”avalanche” phenomenon. The network cascading failures conclude within <span><math><mrow><mn>20</mn><mo>&lt;</mo><mi>t</mi><mo>&lt;</mo><mn>30</mn></mrow></math></span>. This observation is more in line with real-world situations. Furthermore, we explored scenarios of cascading failures caused by node attacked and node mutations, and conducting sensitivity analysis to explore the influence of different parameters on the maximum collapse time of the network. The results indicate that cascading failures resulting from node attacked lead to a faster network collapse. Finally, case analysis results from power grid demonstrate the effectiveness of the proposed adaptive SIRS-F mechanism in ensuring network stability and optimizing network performance.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"169 ","pages":"Article 110697"},"PeriodicalIF":5.0,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143947891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A fault location method for DC distribution networks with DC circuit breaker and current limiter coordination","authors":"Xiaoyong Cao ,&nbsp;Jiaming Weng ,&nbsp;Zaijun Wu ,&nbsp;Dong Liu ,&nbsp;Gaoming Li ,&nbsp;Weinian Ouyang","doi":"10.1016/j.ijepes.2025.110684","DOIUrl":"10.1016/j.ijepes.2025.110684","url":null,"abstract":"<div><div>To enhance the reliability of the protection system and accurately identify fault distances in DC networks, a fault location method is proposed, which leverages the coordination of existing DC circuit breakers (DCCBs) and current limiters. The proposed method effectively achieves single-end signal injection and identification by repurposing existing DCCB components and incorporating a specialized signal injection branch. Concurrently, an efficient cooperative control strategy for the components is introduced to enhance the integration of the fault location method. By analyzing the inductor current decay within the ranging circuit, the relationship between fault distance and fault resistance is established, leading to the development of a fault location algorithm. A DC distribution network model is built by PSCAD/EMTDC, and the location calculation method is simulated in MATLAB. The simulation results validate the efficacy of the proposed fault location method in accurately determining both the distance and resistance of faults. Moreover, this method has demonstrated its robustness across diverse cable types, noise levels, sampling frequencies, and resistance conditions. The proposed fault location method offers distinct advantages over existing techniques in terms of both accuracy and lower complexity of its construction.</div><div>© 2017 Elsevier Inc. All rights reserved.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"169 ","pages":"Article 110684"},"PeriodicalIF":5.0,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of the safe operation region of grid-connected converters under time-varying operating point conditions","authors":"Weijie Xie,&nbsp;Fan Xiao,&nbsp;Yuting Zheng,&nbsp;Guochen Kuang,&nbsp;Chunming Tu,&nbsp;Liu Long,&nbsp;Qi Guo","doi":"10.1016/j.ijepes.2025.110739","DOIUrl":"10.1016/j.ijepes.2025.110739","url":null,"abstract":"<div><div>Plenty of engineering operation experience indicates that the performance of grid-connected converters (GCCs) undergoes a transformation in response to alterations in operating points. The operating points of the GCCs are closely related to several factors such as the volatility of new energy and the random switching of loads, therefore exhibit time-varying characteristics. While traditional impedance/admittance analysis methods are effective in analysing the stability of GCCs at fixed operating points, they become inefficient for systems with time-varying conditions due to the requirement of repeat analyses across multiple operating points. This process becomes particularly time-consuming for systems with numerous potential operating points, ultimately failing to capture the system’s behavior over its entire operating range. Therefore, the current research gap lies in the inability to effectively and comprehensively analyse GCC stability under time-varying conditions, which is a common feature of highly renewable energy integrated systems. This gap is critical because such fluctuations are highly relevant to renewable energy generation systems and can significant impact on GCC stability, and the lack of effective analysis methods may lead to underperform or even failure of these systems. To address this, this paper proposes a unified SISO model that embeded operating point variables directly into the small-signal analysis of GCCs. This approach enables stability analysis across the entire operating range of GCCs without redundant evaluations. Additionally, the proposed method integrates the advantages of the multivariate approach with an intuitive representation of stability based on the safe operating region (SOR), offering an efficient, accurate, and practical method for assessing stability in realistic time-varying environments, which has been challenging in previous research. A 1.7 kW/60 V experimental prototype is constructed to experimentally validate the accuracy and effectiveness of the proposed SOR-based method under both static and time-varying operating conditions.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"169 ","pages":"Article 110739"},"PeriodicalIF":5.0,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143942511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Risk-managed economic dispatch in hybrid hydrothermal-wind-solar systems: a novel multi-objective optimization approach","authors":"Zhe Wang ,&nbsp;Tao Sun ,&nbsp;Na Liu","doi":"10.1016/j.ijepes.2025.110753","DOIUrl":"10.1016/j.ijepes.2025.110753","url":null,"abstract":"<div><div>This study presents a novel multi-objective optimization framework for risk-managed economic dispatch in hybrid hydrothermal-wind-solar systems (HTWPS). To address the uncertainties in renewable energy generation, a quantitative regression approach combined with a multivariate Gaussian distribution is used for scenario generation. The model integrates spinning reserve (SR) constraints and a synchronous peak shaving strategy to enhance system stability and cost efficiency. A Multi-Objective Artificial Rabbits Optimization (MOARO) algorithm, incorporating Pareto criteria and fuzzy theory, is applied to optimize dispatch decisions while balancing cost and risk. Simulation results demonstrate that increasing the comprehensive utilization flow (DCUF) reduces operational risks and costs in the dry season by up to 25.4%, while in the wet season, risk remains stable due to SR constraints. Implementing thermal spinning reserves (HTSR) reduces operational risks by up to 79.1% but increases costs by 22.4%, highlighting a key trade-off. The synchronous peak shaving strategy lowers power abandonment risks by up to 75%. These findings emphasize the importance of integrating risk management in hybrid energy systems to improve operational reliability and economic performance.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"169 ","pages":"Article 110753"},"PeriodicalIF":5.0,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143942508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}