Iet Generation Transmission & Distribution最新文献

Front Cover: Disturbance observer-based finite-time control of a photovoltaic-battery hybrid power system 封面：基于扰动观测器的光伏-电池混合动力系统有限时间控制

IF 2 4区工程技术

Iet Generation Transmission & Distribution Pub Date : 2024-09-12 DOI: 10.1049/gtd2.13271

Fatemeh Esmaeili, Hamid Reza Koofigar

引用次数: 0

Security constrained optimal power shutoff for wildfire risk mitigation 降低野火风险的安全约束最优断电方案

IF 2 4区工程技术

Iet Generation Transmission & Distribution Pub Date : 2024-08-22 DOI: 10.1049/gtd2.13246

Noah Rhodes, Carleton Coffrin, Line Roald

{"title":"Security constrained optimal power shutoff for wildfire risk mitigation","authors":"Noah Rhodes, Carleton Coffrin, Line Roald","doi":"10.1049/gtd2.13246","DOIUrl":"https://doi.org/10.1049/gtd2.13246","url":null,"abstract":"Electric grid faults are increasingly the source of ignition for major wildfires. To reduce the likelihood of such ignitions in high risk situations, utilities use preemptive de-energization of power lines, commonly referred to as Public Safety Power Shutoffs (PSPS). Besides raising challenging trade-offs between power outages and wildfire safety, PSPS removes redundancy from the network at a time when component faults are likely to happen. This may leave the network particularly vulnerable to unexpected line faults that may occur while the PSPS is in place. Previous works have not explicitly considered the impacts of these outages. To address this gap, the Security Constrained Optimal Power Shutoff problem is proposed which uses post-contingency security constraints to model the impact of unexpected line faults when planning a PSPS. This model enables, for the first time, the exploration of a wide range of trade-offs between both wildfire risk and pre- and post-contingency load shedding when designing PSPS plans, providing useful insights for utilities and policy makers considering different approaches to PSPS. The efficacy of the model is demonstrated using the EPRI 39-bus system as a case study. The results highlight the potential risks of not considering security constraints when planning PSPS and show that incorporating security constraints into the PSPS design process improves the resilience of current PSPS plans.","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.13246","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142174326","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}

引用次数: 0

Multi-agent reinforcement learning in a new transactive energy mechanism 新交易能源机制中的多代理强化学习

IF 2 4区工程技术

Iet Generation Transmission & Distribution Pub Date : 2024-08-22 DOI: 10.1049/gtd2.13244

Hossein Mohsenzadeh-Yazdi, Hamed Kebriaei, Farrokh Aminifar

{"title":"Multi-agent reinforcement learning in a new transactive energy mechanism","authors":"Hossein Mohsenzadeh-Yazdi, Hamed Kebriaei, Farrokh Aminifar","doi":"10.1049/gtd2.13244","DOIUrl":"https://doi.org/10.1049/gtd2.13244","url":null,"abstract":"Thanks to reinforcement learning (RL), decision-making is more convenient and more economical in different situations with high uncertainty. In line with the same fact, it is proposed that prosumers can apply RL to earn more profit in the transactive energy market (TEM). In this article, an environment that represents a novel framework of TEM is designed, where all participants send their bids to this framework and receive their profit from it. Also, new state-action spaces are designed for sellers and buyers so that they can apply the Soft Actor-Critic (SAC) algorithm to converge to the best policy. A brief of this algorithm, which is for continuous state-action space, is described. First, this algorithm is implemented for a single agent (a seller and a buyer). Then we consider all players including sellers and buyers who can apply this algorithm as Multi-Agent. In this situation, there is a comprehensive game between participants that is investigated, and it is analyzed whether the players converge to the Nash equilibrium (NE) in this game. Finally, numerical results for the IEEE 33-bus distribution power system illustrate the effectiveness of the new framework for TEM, increasing sellers' and buyers' profits by applying SAC with the new state-action spaces. SAC is implemented as a Multi-Agent, demonstrating that players converge to a singular or one of the multiple NEs in this game. The results demonstrate that buyers converge to their optimal policies within 80 days, while sellers achieve optimality after 150 days in the games created between all participants.","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.13244","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142174328","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}

引用次数: 0

Optimized operation of integrated electricity-HCNG systems with distributed hydrogen injecting 采用分布式氢气喷射技术的电力-氢化天然气集成系统的优化运行

IF 2 4区工程技术

Iet Generation Transmission & Distribution Pub Date : 2024-08-22 DOI: 10.1049/gtd2.13222

Kun Yang, Yulong Deng, Chunyan Li, Derong Yi, Yang Liu, Bo Hu, Changzhen Shao

{"title":"Optimized operation of integrated electricity-HCNG systems with distributed hydrogen injecting","authors":"Kun Yang, Yulong Deng, Chunyan Li, Derong Yi, Yang Liu, Bo Hu, Changzhen Shao","doi":"10.1049/gtd2.13222","DOIUrl":"https://doi.org/10.1049/gtd2.13222","url":null,"abstract":"Green hydrogen, the cleanest energy carrier, is receiving increased attention in recent years. Transporting hydrogen through a natural gas system (NGS) will significantly promote the use of hydrogen, moreover, hydrogen-enriched compressed natural gas (HCNG) has great potential for renewable energy accommodation. To solve the problem of altered gas flow caused by hydrogen injection into natural gas networks, an optimized operation model of integrated electricity-HCNG systems (IEHCNGS) with distributed hydrogen injecting is proposed in this paper. Firstly, a calculating model of hydrogen volume fraction based on minimum square summation and depth-first search is established to describe the gas flow distribution of NGS accurately. Secondly, a quantitative method of gas supply reliability based on maximum entropy is proposed to ensure the safe operation of the system. Finally, an optimization model of IEHCNGS is established considering the coupling constraints of the integrated system and the reliability of NGS. The case study shows that the hydrogen volume fraction calculation model can correct the heat value of gas in each pipeline in real-time, the maximum entropy model helps to improve the gas supply reliability of NGS, and the distributed hydrogen injecting mode is more capable of accommodating renewable energy.","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.13222","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142174329","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}

引用次数: 0

Disturbance observer-based finite-time control of a photovoltaic-battery hybrid power system 基于扰动观测器的光伏-电池混合电力系统有限时间控制

IF 2 4区工程技术

Iet Generation Transmission & Distribution Pub Date : 2024-08-22 DOI: 10.1049/gtd2.13248

Fatemeh Esmaeili, Hamid Reza Koofigar

引用次数: 0

Dynamic partitioning of island smart distribution systems in emergencies 紧急情况下岛屿智能配电系统的动态分区

IF 2 4区工程技术

Iet Generation Transmission & Distribution Pub Date : 2024-08-21 DOI: 10.1049/gtd2.13242

Zahra Hosseini Najafabadi, Asghar Akbari Foroud

{"title":"Dynamic partitioning of island smart distribution systems in emergencies","authors":"Zahra Hosseini Najafabadi, Asghar Akbari Foroud","doi":"10.1049/gtd2.13242","DOIUrl":"https://doi.org/10.1049/gtd2.13242","url":null,"abstract":"When a severe fault occurs in the distribution network, all or parts of it may be disconnected from the upstream network. Partitioning of these islanded areas is a solution to supplying the affected loads. Due to the variable nature of loads and renewable distributed generation (DG), the static model of partitioning with a fixed nature during island operation cannot be suitable. Therefore, in this article, considering the variable nature of loads and renewable distributed generation, a dynamic model is presented for the island partitioning to restore more valuable loads, which is suitable for quick decision-making in emergencies. Also, a method for deciding on the mode of charging and discharging storage systems in emergencies is proposed. This model considers time limitation, uncontrollable DGs, controllable DGs and their control, controllability, and priority of loads, tie-switches, storage systems, simultaneous faults, different situations of unintentional islanding of the distribution network, position of switches, and variable nature of loads and distributed generations. So, it is more comprehensive than the previous methods. Applying the proposed model to the modified IEEE 69-bus system with controllable and uncontrollable generation and storage systems assuming different scenarios shows the effectiveness of the proposed scheme.","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.13242","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142174164","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}

引用次数: 0

Distributionally robust sequential load restoration of distribution system considering random contingencies 考虑随机突发事件的配电系统分布式稳健顺序负载恢复

IF 2 4区工程技术

Iet Generation Transmission & Distribution Pub Date : 2024-08-20 DOI: 10.1049/gtd2.13155

Yangwu Shen, Feifan Shen, Heping Jin, Ziqian Li, Zhongchu Huang, Yunyun Xie

{"title":"Distributionally robust sequential load restoration of distribution system considering random contingencies","authors":"Yangwu Shen, Feifan Shen, Heping Jin, Ziqian Li, Zhongchu Huang, Yunyun Xie","doi":"10.1049/gtd2.13155","DOIUrl":"https://doi.org/10.1049/gtd2.13155","url":null,"abstract":"Natural disasters would destroy power grids and lead to blackouts. To enhance resilience of distribution systems, the sequential load restoration strategy can be adopted to restore outage portions using a sequence of control actions, such as switch on/off, load pickup, distributed energy resource dispatch etc. However, the traditional strategy may be unable to restore the distribution system in extreme weather events due to random sequential contingencies during the restoration process. To address this issue, this paper proposes a distributionally robust sequential load restoration strategy to determine restoration actions. Firstly, a novel multi-time period and multi-zone contingency occurrence uncertainty set is constructed to model spatial and temporal nature of sequential line contingencies caused by natural disasters. Then, a distributionally robust load restoration model considering uncertain line contingency probability distribution is formulated to maximize the expected restored load amount with respect to the worst-case line contingency probability distribution. Case studies were carried out on the modified IEEE 123-node system. Simulation results show that the proposed distributionally robust sequential load restoration strategy can produce a more resilient load restoration strategy against random sequential contingencies. Moreover, as compared with the conventional robust restoration strategy, the proposed strategy yields a less conservative restoration solution.","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.13155","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142174255","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}

引用次数: 0

A multi-objective interval optimization approach to expansion planning of active distribution system with distributed internet data centers and renewable energy resources 分布式互联网数据中心和可再生能源主动配电系统扩展规划的多目标区间优化方法

IF 2 4区工程技术

Iet Generation Transmission & Distribution Pub Date : 2024-08-19 DOI: 10.1049/gtd2.13249

Yuying Zhang, Chen Liang, Han Wang, Jiayi Zhang, Bo Zeng, Wenxia Liu

{"title":"A multi-objective interval optimization approach to expansion planning of active distribution system with distributed internet data centers and renewable energy resources","authors":"Yuying Zhang, Chen Liang, Han Wang, Jiayi Zhang, Bo Zeng, Wenxia Liu","doi":"10.1049/gtd2.13249","DOIUrl":"https://doi.org/10.1049/gtd2.13249","url":null,"abstract":"With the development of the digital economy, the power demand for data centers (DCs) is rising rapidly, which presents a challenge to the economic and low-carbon operation of the future distribution system. To this end, this paper fully considers the multiple flexibility of DC and its impact on the active distribution network, and establishes a collaborative planning model of DC and active distribution network. Differing from most existing studies that apply robust optimization or stochastic optimization for uncertainty characterization, this study employs a novel interval optimization approach to capture the inherent uncertainties within the system (including the renewable energy source (RES) generation, electricity price, electrical loads, emissions factor and workloads). Subsequently, the planning model is reformulated as the interval multi-objective optimization problem (IMOP) to minimize economic cost and carbon emission. On this basis, instead of using a conventional deterministic-conversion approach, an interval multi-objective optimization evolutionary algorithm based on decomposition (IMOEA/D) is proposed to solve the proposed IMOP, which is able to fully preserve the uncertainty inherent in interval-typed information and allow to obtain an interval-formed Pareto front for risk-averse decision-making. Finally, an IEEE 33-node active distribution network is utilized for simulation and analysis to confirm the efficacy of the proposed approach.","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.13249","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142174157","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}

引用次数: 0

Research on live detection technology of distribution network cable insulation deterioration state based on harmonic components 基于谐波成分的配电网电缆绝缘劣化状态带电检测技术研究

IF 2 4区工程技术

Iet Generation Transmission & Distribution Pub Date : 2024-08-16 DOI: 10.1049/gtd2.13238

Ran Hu, Haisong Xu, Xu Lu, Anzhe Wang, Zhifeng Xu, Yuli Wang, Daning Zhang

{"title":"Research on live detection technology of distribution network cable insulation deterioration state based on harmonic components","authors":"Ran Hu, Haisong Xu, Xu Lu, Anzhe Wang, Zhifeng Xu, Yuli Wang, Daning Zhang","doi":"10.1049/gtd2.13238","DOIUrl":"https://doi.org/10.1049/gtd2.13238","url":null,"abstract":"Due to the limitations imposed by urban power grid outages for maintenance, on-line harmonic current detection technology for distribution network cables is expected to become an effective supplement to traditional offline diagnostic methods, enhancing the real-time diagnosis of distribution network cable insulation conditions. This study established a 10 kV distribution network cable test platform and prepared typical defective cables subjected to moisture and long-term thermal aging. Using COMSOL finite element electromagnetic simulation, the magnetic flux evolution laws of the cable insulation under typical defects were obtained. Experimental tests provided the harmonic current characteristics and statistical features of cables with typical defects. Based on these data, a method for analysing the degradation degree of distribution network cables was constructed using least absolute shrinkage and selection operator (LASSO) regression analysis. Furthermore, a defect-type identification method based on cluster analysis was proposed. Results indicate that the odd harmonics and the 4th harmonic of the distribution network cable's harmonic current are closely related to the cable's degradation state. A model integrating principal component analysis (PCA) data dimensionality reduction and expectation-maximization clustering analysis achieved a recognition accuracy of up to 75.64% in distinguishing between moisture-affected and normal cable states. The proposed on-line detection and evaluation methods can effectively identify high-risk cables with latent defects.","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.13238","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142123382","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}

引用次数: 0

Integrated demand response optimization strategy considering risk appetite under multi-dimensional uncertain information 多维不确定信息下考虑风险偏好的综合需求响应优化策略

IF 2 4区工程技术

Iet Generation Transmission & Distribution Pub Date : 2024-08-15 DOI: 10.1049/gtd2.13245

Shunlin Zheng, Yaliang Liu, Yi Sun, Xinpeng Mo, Liming Feng, Xinya Liu, Quan Chao, Wangzhang Cao

{"title":"Integrated demand response optimization strategy considering risk appetite under multi-dimensional uncertain information","authors":"Shunlin Zheng, Yaliang Liu, Yi Sun, Xinpeng Mo, Liming Feng, Xinya Liu, Quan Chao, Wangzhang Cao","doi":"10.1049/gtd2.13245","DOIUrl":"https://doi.org/10.1049/gtd2.13245","url":null,"abstract":"Integrated demand response (IDR) is deemed as an effective tool to balance energy supply and demand. User’s uncertain information containing prior uncertain information and posterior uncertain information is a key factor affecting the implementation effectiveness of IDR, but existing studies fail to consider the two types of uncertain information, response risk caused by the uncertain information, and risk appetite comprehensively. Based on the principal-agent theory of optimal incentive contract under uncertain information and Markowitz's mean-variance portfolio theory, a new IDR model is established in this paper, and an IDR optimization strategy considering risk appetite under uncertain information is proposed. By proposing the user model considering multi-dimensional uncertain information and the risk appetite-based integrated energy service providers (IESP) model based on the principal-agent theory and Markowitz's mean-variance portfolio theory, we have achieved effective modelling of the user’s uncertain information and the risk borne by IESP. The arithmetic examples have verified advantages of the model in enhancing the accuracy of user’s actual response prediction and the superiority of incentive strategies, which is beneficial to reduce the cost of IESPs and enhance the benefit of users participating in IDR.","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.13245","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142174210","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}

引用次数: 0