{"title":"Optimisation Scheduling of Integrated Electricity-Heat-Oxygen Energy Systems Considering Demand Response and Carbon Trading Based on IGDT","authors":"Zhe Yin, Ruijin Zhu, Shiting Cui, Tengshuo Li, Yifan Zhang, Zhifan Zhang","doi":"10.1049/gtd2.70126","DOIUrl":"10.1049/gtd2.70126","url":null,"abstract":"<p>With economic development, the residents of Tibet's high-altitude regions have an increasing demand for quality of life. This study addresses the oxygen supply needs, renewable energy instability and load uncertainty in high-altitude areas, while aligning with the goal of reducing carbon emissions. A combined electricity, heat and oxygen integrated energy system (IES) suitable for high-altitude areas is proposed. Firstly, a combined oxygen supply mode integrating power-to-gas and vacuum pressure swing adsorption is established. Secondly, due to renewable energy instability and load fluctuations, an information gap decision theory model is developed, considering both risk-averse and risk-seeking perspectives. Demand response is also incorporated to ensure a reliable energy system. Finally, a tiered carbon trading mechanism is introduced, and an optimised scheduling model for the integrated energy system is established. Using the Gurobi optimiser for typical load cases in high-altitude areas, results show that under the risk-averse strategy, IES costs increase based on the deviation factor, while under the risk-seeking strategy, IES costs decrease accordingly.</p>","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":"19 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.70126","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144635158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Advancing Network-Constrained P2P Transactions for Mutual Benefits: Lifecycle Costs Allocation DLMP Integrated With Soft Open Point Planning","authors":"Qianyi Ma, Zifa Liu, Xiao Liu","doi":"10.1049/gtd2.70127","DOIUrl":"10.1049/gtd2.70127","url":null,"abstract":"<p>Peer-to-peer (P2P) transactions among multiple microgrids (MMGs) may cause network violations, requiring greater flexibility in the distribution network (DN). Soft open point (SOP) is a promising power electronic device to provide flexible active and reactive power regulation to the networks. In this context, this paper proposes a bi-level network-constrained P2P transaction framework integrating SOP capacity planning, offering a paradigm for lifecycle cost allocation in P2P markets. In the upper level, the DN ensures safe operation, optimises SOP capacity, and broadcasts market signals. To allocate network service costs and direct grid-friendly transactions, a decomposable SOP planning integrated distribution locational marginal price (DLMP) is proposed as the pricing mechanism. In the lower level, MMGs optimise internal scheduling. To establish the global negotiation mechanism, a fully parallel distributed method based on diagonal quadratic approximation (DQA) is proposed. Case studies on the modified IEEE 33-bus system show that the proposed transaction-aware SOP planning method uncovers the potential of SOP planning in supporting P2P flexibility and improving social benefits. Total costs of the DN and MMGs are decreased by 2.11% and 8.44%, respectively.</p>","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":"19 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.70127","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144635157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Optimization of Transient Control Parameters of Renewable Energy Considering Power Angle Stability and Over-Voltage in the Power Generation Base","authors":"Yuxin Yang, Yongli Zhu, Jinsong Wang, Haichao Yang, Jian Wu","doi":"10.1049/gtd2.70124","DOIUrl":"10.1049/gtd2.70124","url":null,"abstract":"<p>Coupling renewable energy with conventional energy sources for power transmission is an effective approach to improving the absorption capacity of renewable energy. However, the issues of transient angle instability and over-voltage are key factors limiting the external transmission capacity of the power corridor. First, an equivalent power angle characteristic equation for a renewable energy-thermal power coupling generation system is established to analyse the impact of transient control parameters on transient power angle stability. Second, a mathematical analysis of terminal voltage of the renewable energy machine is conducted to explore the influence of transient control parameters on the terminal voltage. Third, optimization principles for transient control parameters of renewable energy are proposed. Finally, a case study of athermal power-renewable energycoupled generation base is presentedand the effectiveness of the proposedmethod is validated through time-domain simulations.</p>","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":"19 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.70124","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144615329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Real Time Simulation Study of DEH for Digital Twin Steam Turbine Generators","authors":"Yiwei Zhou, Xiao Guo, Xiaoran Dai, Zhongcheng Lei, Wenshan Hu, Hong Zhou","doi":"10.1049/gtd2.70119","DOIUrl":"10.1049/gtd2.70119","url":null,"abstract":"<p>Despite the surge in popularity of new energy sources in recent years, the indispensability of thermal power plants remains unwavering. The steam turbine generator digital electro-hydraulic (DEH) control system is a pivotal component in thermal power plants, directly influencing the safety, stability and efficiency of both the plant and the interconnected power grid. Therefore, for better monitoring and control of the DEH, it is necessary to conduct digital twin research on the DEH. This article presents a holistic approach to advancing the digital twin of DEH control systems, mainly including the construction of a dynamic mathematical model, comprehensive digital simulations under varying conditions, and the innovative development of a real-time online simulation platform. Additionally, the integration of a three-dimensional model enhances the depth and visualisation, providing a more immersive understanding of the DEH system's intricate dynamics. The successful implementation of this platform serves as a cornerstone, laying a robust foundation for the eventual establishment of the DEH digital twin system.</p>","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":"19 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.70119","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144615328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ahmed A. Alguhi, Essam A. Al-Ammar, Wonsuk Ko, Hyeong-Jin Choi, Sisam Park, Mansoor Khan
{"title":"Optimizing EVs Penetration Levels in Smart Grids Using Dynamic Pricing and Renewable Energy Backed by BESS While Maintaining Grid Constraints","authors":"Ahmed A. Alguhi, Essam A. Al-Ammar, Wonsuk Ko, Hyeong-Jin Choi, Sisam Park, Mansoor Khan","doi":"10.1049/gtd2.70120","DOIUrl":"10.1049/gtd2.70120","url":null,"abstract":"<p>This study explores the impact of various EV penetration scenarios on grid performance utilizing a time-of-use (ToU) dynamic pricing scheme. In this study, energy costs are fixed at 0.18 SR/kWh during off-peak hours and 0.30 SR/kWh during on-peak hours, based on actual tariffs provided by the local electric utility dynamic pricing strategies and leveraging renewable energy sources supported by battery energy storage systems (BESS). The proposed framework aims to identify the optimal EV penetration level that maximizes EV utilization without compromising grid stability or violating system constraints. The IEEE 69-bus test system is used to assess the proposed approach under two different consumers and various EV penetration scenarios to examine the effects on power losses, voltage profiles, thermal limit, and system expenses. Results demonstrate that integrating EVs with dynamic pricing and renewable resources backed by BESS can effectively balance energy demand and supply, reduce power losses, and enhance voltage and current profiles. The findings underscore the feasibility of achieving resilient and sustainable grid operations while accommodating a higher number of EVs. This study offers valuable insights into the potential of smart grid technologies to support large-scale EV adoption.</p>","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":"19 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.70120","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144598542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Sizing and Location Selection of Medium-Voltage Back-to-Back Converters for DER-Dominated Distribution Systems","authors":"Xiangqi Zhu, Akanksha Singh, Barry Mather","doi":"10.1049/gtd2.70094","DOIUrl":"10.1049/gtd2.70094","url":null,"abstract":"<p>Medium-voltage back-to-back (MVB2B) converters can connect two distribution systems and quantifiably transfer power between them. This function can enable the MVB2B converter to exchange distributed energy resource (DER)-generated power between two systems and bring significant value to enhancing distribution system DER adoption. Our previous work analysed and demonstrated the value MVB2B converter can bring to DER integration. As continuous work, this paper presents a methodology that helps address the MVB2B converter sizing and location selection problem in distribution systems with high DER penetrations. The proposed methodology aims to address three critical problems for MVB2B converter implementation in the real world: (1) which distribution systems are better to be connected, (2) what converter size is appropriate for connecting the distribution systems, and (3) where the optimal connection points are in the systems for connecting the MVB2B converter. The proposed methodology has been demonstrated by case studies that include various scenarios involving distribution systems with different dominated load types and high photovoltaic penetrations. The results demonstrate that selecting the optimal converter size based on net revenue and time of return considerations leads to a balance between maximizing energy savings and minimizing financial payback periods. Furthermore, feeder pair selection based on load profile standard deviation effectively identifies systems that derive the greatest value from MVB2B integration. Finally, an optimized connection point selection approach using a voltage load sensitivity matrix ensures minimal system impact while facilitating efficient power exchange. These findings provide practical insights for the real-world deployment of MVB2B converters to enhance DER hosting capacity and improve grid resilience.</p>","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":"19 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.70094","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144606524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Liang Zhao, Longfu Luo, Yuzhuo Wang, Hao Zhang, Yan Feng, Yanyun Jin
{"title":"Research on Vibration and Noise of Converter Transformer Based on LCL Converter","authors":"Liang Zhao, Longfu Luo, Yuzhuo Wang, Hao Zhang, Yan Feng, Yanyun Jin","doi":"10.1049/gtd2.70118","DOIUrl":"10.1049/gtd2.70118","url":null,"abstract":"<p>The paper introduces a novel converter design that utilizes an LCL filtering structure to mitigate the issues of harmonic generation, which can exacerbate the vibration and noise in converter transformers within high-voltage direct current transmission systems. The paper presents a comprehensive analysis of the vibration and noise reduction capabilities of the converter from both theoretical and experimental viewpoints. Firstly, the paper outlines the topology of the new LCL converter. Following this, a new harmonic model for the LCL converter is established to analyse its harmonic characteristics. Additionally, the paper examines how varying filter capacitor values impact the filtering efficacy and the subsequent reduction in vibration and noise. To validate these findings, a 12-pulse rectification principle prototype experimental platform was constructed. This platform was used to compare the power quality of traditional LCC converters with the new LCL converters, as well as to analyse the vibration and noise characteristics of the converter transformers. The experimental results indicate that the proposed LCL converter not only effectively suppresses harmonics but also significantly reduces the vibration and noise of the converter transformers.</p>","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":"19 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.70118","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144573308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Arkadeep Deb, Jose Ortiz Gonzalez, Ruizhu Wu, Walid Issa, Saeed Jahdi, Olayiwola Alatise
{"title":"Rapid Electric Vehicle Charging Based on Silicon Carbide Enabled Medium Voltage DC Transmission Systems","authors":"Arkadeep Deb, Jose Ortiz Gonzalez, Ruizhu Wu, Walid Issa, Saeed Jahdi, Olayiwola Alatise","doi":"10.1049/gtd2.70092","DOIUrl":"10.1049/gtd2.70092","url":null,"abstract":"<p>Rapid electric vehicle (EV) chargers with power ratings above 100 kW will become more common in the future. Reinforcing UK distribution networks with additional power handling capacity can be costly and disruptive. This is due to the limited headroom in 11 kV distribution networks and the high population densities where 11 kV/400 V transformers are located. This paper proposes a medium voltage DC (MVDC) system that bypasses the 33 kV/11 and 11 kV/400 V AC transformers by transmitting 54 kV DC power directly to the EV charging stations. The 33 kV AC to 54 kV rectification in this system is proposed to be done by using a 29-level modular multilevel converter (MMC) implemented in 3.3 kV SiC MOSFETs. On the EV side, there will be a 54 kV to 800 V/400 V fully isolated DC/DC converter implemented with 3.3 kV SiC MOSFETs on the primary side and 1.2 kV SiC MOSFETs or Schottky diodes on the secondary side. This paper presents experimentally calibrated converter simulation results demonstrating improved performance in the MVDC system and shows this is only possible with SiC MOSFET technology, as the losses using silicon IGBTs make the system less efficient than the existing AC transmission system.</p>","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":"19 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.70092","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144524596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Determining the Ideal Proportion of Intermittent Renewable Energy in Electricity Market Considering Transmission Line Capacities Using Multi-Criteria Decision-Making","authors":"Arash Lotfipour, Seyed Saeid Mohtavipour","doi":"10.1049/gtd2.70109","DOIUrl":"10.1049/gtd2.70109","url":null,"abstract":"<p>Renewable energy sources (RES) have gained growing interest due to their ability to provide cleaner energy and high-energy efficiency. However, the integration of RES into electricity markets remains challenging due to their intermittent nature and the merit-order effect. To tackle the complex task of determining the appropriate share of variable RES for market involvement, this paper introduces a multi-criteria decision-making (MCDM) framework that merges the simple additive weighting (SAW) with the analytic hierarchy process (AHP), referred to as AHP-SAW. This paper proposes one criterion representing transmission lines and five criteria representing the electricity market. By defining these criteria and solving the mathematical model associated with the proposed AHP-SAW method, the optimal allocation of renewable resources for involvement in the wholesale market is determined, while transmission line constraints are considered. The analysis suggests that increasing the marginal costs for firms leads to different effects on transmission line congestion, depending on the firm in question. While some firms’ higher costs reduce congestion, others may exacerbate it. Also, the results prove that a significant increase in the share of renewable energy sources leads to considerable fluctuations in market prices, with prices even reaching negative values. This issue becomes an obstacle to the profitable participation of traditional units in the market, which in turn creates additional challenges for the system. By the proposed model and according to the priorities of the policymaker, 50%, 60%, and 60% of the maximum permissible share of RES are considered desirable penetration levels for the systems according to three different locations.</p>","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":"19 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.70109","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144473163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Juha Haakana, Jouni Haapaniemi, Akseli Lamminpää, Jukka Lassila, Sami Viiliäinen, Mikko Vähäsaari
{"title":"Effects of Extreme Spot Market Prices on the Electrical Power System: Lessons From the Finnish Distribution System","authors":"Juha Haakana, Jouni Haapaniemi, Akseli Lamminpää, Jukka Lassila, Sami Viiliäinen, Mikko Vähäsaari","doi":"10.1049/gtd2.70114","DOIUrl":"10.1049/gtd2.70114","url":null,"abstract":"<p>In the past few years, both high and low spot prices have become common in the Finnish power system. This paper seeks to demonstrate the effects of exceptional negative and positive prices on electricity consumption. On 24 November 2023, an extreme case was observed in the Finnish electricity market area, when spot prices reached values of −500 €/MWh for half a day. This meant that even with distribution fees and taxes added to the spot price, the end users were paid over 0.4 €/kWh for their electrical energy use, which produced an incentive to consume electricity. Another special case occurred on 5 January 2024, when the spot price of electricity rose to a record of 1896 €/MWh. For a customer with a spot-price-based contract, the retail price was over 2.3 €/kWh with the value added tax, making electricity consumption very expensive. Thus, the electricity consumption was affected by spot prices. The consumption increased considerably as the spot prices declined to −500 €/MWh and correspondingly, decreased with high spot prices. The main influence on consumption was observed in households that had retail electricity contracts based on spot prices, which provided them with a direct incentive to adjust their electricity consumption. A previous version of this paper was presented at the CIRED 2024 Vienna Workshop.</p>","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":"19 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.70114","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144473164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}