IET Energy Systems Integration最新文献_第10页

Adaptive backstepping controller design for DC/DC buck converter optimised by grey wolf algorithm 灰狼算法优化的DC/DC降压变换器自适应反步控制器设计

IF 2.4

IET Energy Systems Integration Pub Date : 2023-04-19 DOI: 10.1049/esi2.12098

Seyyed Morteza Ghamari, Fatemeh Khavari, Hasan Mollaee

{"title":"Adaptive backstepping controller design for DC/DC buck converter optimised by grey wolf algorithm","authors":"Seyyed Morteza Ghamari, Fatemeh Khavari, Hasan Mollaee","doi":"10.1049/esi2.12098","DOIUrl":"10.1049/esi2.12098","url":null,"abstract":"A Lypunov-based Adaptive Backstepping Control (ABSC) approach is designed for a power Buck converter. This strategy is an advanced version of the Backstepping method utilising Lyapunov stability function to reach a higher stability and a better disturbance rejection behaviour in the practical applications. In addition, to reduce the computational burden and increase ease of implantation, Black-box technique is considered assuming no accurate mathematical model for the system. Nonetheless, in real-time environments, disturbances with wider ranges including: supply voltage variation, parametric variation, and noise can negatively impact the operation of this method. To compensate for this problem, the gains of the controller should be tuned again for better adaptability with the working condition. Therefore, to satisfy this need and enhance the controller's performance, a metaheuristic algorithm is applied in the control scheme called Grey Wolf Optimisation (GWO) algorithm. GWO is a well-behaved nature-inspired algorithm with faster decision-making dynamics along with more accuracy over different optimisation algorithms. To better elaborate the merits of this approach, conventional BSM and PSO-based PID schemes are also designed and tested in different situations.","PeriodicalId":33288,"journal":{"name":"IET Energy Systems Integration","volume":"6 1","pages":"18-30"},"PeriodicalIF":2.4,"publicationDate":"2023-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/esi2.12098","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42727823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Small-signal modelling and analysis of microgrids with synchronous and virtual synchronous generators 同步和虚拟同步发电机微电网的小信号建模和分析

IF 2.4

IET Energy Systems Integration Pub Date : 2023-04-16 DOI: 10.1049/esi2.12099

Rui Liu, Li Ding, Cheng Xue, Yunwei (Ryan) Li

{"title":"Small-signal modelling and analysis of microgrids with synchronous and virtual synchronous generators","authors":"Rui Liu, Li Ding, Cheng Xue, Yunwei (Ryan) Li","doi":"10.1049/esi2.12099","DOIUrl":"10.1049/esi2.12099","url":null,"abstract":"In autonomous alternating current microgrids, the grid-forming virtual synchronous generators can cooperate with the conventional synchronous generators to improve system inertia and frequency regulation capability. However, undesired active power oscillations between the synchronous generators and grid-forming virtual synchronous generators may trigger their overcurrent protection and even result in a blackout. To explicitly reveal the oscillatory modes over all frequency bands, a high-fidelity full-order state-space model is first developed. A potentially destabilising sub-synchronous oscillation mode resulting from the interaction between grid-forming virtual synchronous generators voltage controller and synchronous generators q-axis damper winding is identified. Other modes reflecting the low-frequency oscillation and frequency restoration dynamics are also assessed. Subsequently, to make a reasonable trade-off between the accuracy and simplicity of system modelling, an enhanced quasi-stationary model dedicated to low-frequency oscillation evaluation is simplified from the full-order type. The enhanced quasi-stationary model features simplicity and low-order benefits, which makes it more practical for multi-generator system analysis. Moreover, by considering the dynamics of synchronous generators field winding and excitation system, the enhanced quasi-stationary model significantly improves the low-frequency oscillation characterisation accuracy compared with the existing quasi-stationary model. The two developed models are comprehensively compared with the existing small-signal models. Real-time simulations based on RT-LAB are conducted to verify the correctness of the theoretical analysis and the accuracy of the proposed small-signal models.","PeriodicalId":33288,"journal":{"name":"IET Energy Systems Integration","volume":"6 1","pages":"45-61"},"PeriodicalIF":2.4,"publicationDate":"2023-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/esi2.12099","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48666368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improving fault ride-through capability for doubly-fed induction generator based on improved system structure and corresponding control scheme 基于改进的系统结构和相应的控制方案，提高双馈感应发电机的故障穿越能力

IF 2.4

IET Energy Systems Integration Pub Date : 2023-04-03 DOI: 10.1049/esi2.12097

Long Xian, Lizhen Wu, Xiaoying Zhang, TingTing Pei

{"title":"Improving fault ride-through capability for doubly-fed induction generator based on improved system structure and corresponding control scheme","authors":"Long Xian, Lizhen Wu, Xiaoying Zhang, TingTing Pei","doi":"10.1049/esi2.12097","DOIUrl":"10.1049/esi2.12097","url":null,"abstract":"Although there are many methods to improve the fault ride-through (FRT) capability of doubly-fed induction generator (DFIG) systems at present, each method has its shortcomings, especially the applicability under different voltage dips (VDs), so an improved system structure with a dynamic switching topology and a corresponding control scheme is proposed. Based on the mechanism analysis that the series impedance of the stator can effectively reduce the overcurrent on the rotor side, and considering the feasibility of the FRT scheme in engineering, the dynamic switching topology is designed. The selection of theoretical parameters in different cases is also analysed and designed. Simultaneously, to cooperate with the hardware measures, the control scheme of the rotor side converter (RSC) under different conditions is also improved. The RSC can use the control scheme of active flux attenuation to effectively and quickly reduce the overcurrent on the rotor side, and use reactive power support to accelerate the voltage recovery. The novelty of the FRT scheme is that the scheme can dynamically adjust the topology structure and control scheme under different voltage dips. Thus, its ride-through performance during fault is better under different conditions. A simulation model of the improved system structure and control scheme is built on the MATLAB/Simulink platform. Through the comparison of simulation data, the validity and correctness of the proposed FRT scheme are verified.","PeriodicalId":33288,"journal":{"name":"IET Energy Systems Integration","volume":"6 1","pages":"73-85"},"PeriodicalIF":2.4,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/esi2.12097","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48265085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Coordinated voltage control of active distribution networks with photovoltaic and power to hydrogen 光伏和氢电有功配电网的协调电压控制

IF 2.4

IET Energy Systems Integration Pub Date : 2023-03-13 DOI: 10.1049/esi2.12096

Yongxiang Zhang, Jian Chen, Haoran Zhao, Wen Zhang, Wenshu Jiao, Wuzhen Dai

{"title":"Coordinated voltage control of active distribution networks with photovoltaic and power to hydrogen","authors":"Yongxiang Zhang, Jian Chen, Haoran Zhao, Wen Zhang, Wenshu Jiao, Wuzhen Dai","doi":"10.1049/esi2.12096","DOIUrl":"10.1049/esi2.12096","url":null,"abstract":"The rapid increase of photovoltaic (PV) penetration in active distribution networks (ADN) is posing great challenges to traditional voltage control schemes. A two-stage voltage control strategy of ADN is proposed by the authors based on the alternating direction method of multipliers (ADMM) with refined power to hydrogen (P2H) model, considering multiple types of PV forms such as residential photovoltaic cluster (RPVC) and small-scale PV power stations. In the day-ahead stage, the optimal power flow is performed to determine the optimal scheduling results of on-load tap changers and capacitor banks etc. In the intra-day stage, the real-time voltage control strategy is implemented at the distribution network layer to regulate the power of each type of PV, energy storage systems and P2H to further reduce the voltage deviation. At the customer layer, the residential photovoltaic (RPV) within the RPVC is precisely controlled based on the ADMM algorithm to achieve the minimum voltage deviation at each RPV access point. The proposed strategy is tested on the modified IEEE 33-bus and IEEE 69-bus distribution systems, and the simulation results verify its effectiveness in mitigating voltage violations.","PeriodicalId":33288,"journal":{"name":"IET Energy Systems Integration","volume":"5 3","pages":"245-260"},"PeriodicalIF":2.4,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/esi2.12096","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41326288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Energy and power management system for microgrids of large-scale building prosumers 大型建筑生产用户微电网的能源和电力管理系统

IF 2.4

IET Energy Systems Integration Pub Date : 2023-02-23 DOI: 10.1049/esi2.12095

Dimitra G. Kyriakou, Fotios D. Kanellos

{"title":"Energy and power management system for microgrids of large-scale building prosumers","authors":"Dimitra G. Kyriakou, Fotios D. Kanellos","doi":"10.1049/esi2.12095","DOIUrl":"10.1049/esi2.12095","url":null,"abstract":"A method for optimal energy and power management of microgrids consisting of mega buildings, plug-in electric vehicles (PEVs) and renewable energy sources (RES) with low computation requirements is proposed by the authors. Thermal and electrical loads are considered for the operation scheduling of the microgrid. In case of non-interconnected operation of the microgrid with the main power grid, the proposed method allows the microgrid to meet the power demand by the buildings and distribution loads exploiting only the hosted PEVs, the integrated RES and, if it is necessary or financially optimal, building auxiliary diesel generators. The primary goal of the suggested algorithm is to significantly reduce the overall daily cost of the microgrid's operation while simultaneously meeting a wide range of constraints. The implementation of the method is based on the exploitation of a two-level hierarchical multi-agent system (MAS) at the level of the microgrid. Suitably defined flexibilities of the microgrid's components to change their power are used to implement optimal power dispatch to them. Detailed simulation results indicated that a remarkable cost reduction of 27% can be achieved.","PeriodicalId":33288,"journal":{"name":"IET Energy Systems Integration","volume":"5 2","pages":"228-244"},"PeriodicalIF":2.4,"publicationDate":"2023-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/esi2.12095","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47669018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

A combined unsupervised learning approach for electricity theft detection and loss estimation 一种结合无监督学习的电力盗窃检测和损失估计方法

IF 2.4

IET Energy Systems Integration Pub Date : 2023-02-22 DOI: 10.1049/esi2.12094

Liangcai Xu, Zhenguo Shao, Feixiong Chen

{"title":"A combined unsupervised learning approach for electricity theft detection and loss estimation","authors":"Liangcai Xu, Zhenguo Shao, Feixiong Chen","doi":"10.1049/esi2.12094","DOIUrl":"10.1049/esi2.12094","url":null,"abstract":"Electricity theft is a great trouble for power companies. As the means of tampering with smart meters continue to increase, the electricity theft behaviours become more diversified and covert, which are difficult to be identified using the existing electricity theft detection method. In addition, the existing methods usually cannot estimate the economic losses caused by electricity theft. To address these issues, a combined unsupervised learning approach for electricity theft detection and loss estimation is proposed in this study. First, three anomaly measurement indexes including the mean index, fluctuation index, and trend index are proposed to capture different anomalies respectively. Then, based on historical electricity consumption data, we develop two unsupervised learning techniques including the sample-to-subsamples decomposition algorithm and clustering algorithm to obtain the typical ranges of index values, and the load samples whose index values are not in the typical ranges will be considered fraudulent. Furthermore, three anomaly measurement indexes are combined to judge whether the load sample is fraudulent, and the user whose most load samples are judged fraudulent will be considered as an electricity thief. Finally, an economic loss estimation method is proposed, which quantifies the losses of electricity theft. Numerical experiments are carried out based on the Irish smart meter dataset, and the results demonstrate the effectiveness and the superior performance of the proposed method compared with a series of electricity theft detection methods.","PeriodicalId":33288,"journal":{"name":"IET Energy Systems Integration","volume":"5 2","pages":"213-227"},"PeriodicalIF":2.4,"publicationDate":"2023-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/esi2.12094","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42218509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Distributed energy management for underground engineering microgrid with reliable power supply 可靠供电的地下工程微电网分布式能源管理

IF 2.4

IET Energy Systems Integration Pub Date : 2023-02-13 DOI: 10.1049/esi2.12093

Hongda Wang, Zhipeng Jiao, Jianchun Xing, Qiliang Yang, Man Yang, Yutao Zhou, Jiubing Zhao

{"title":"Distributed energy management for underground engineering microgrid with reliable power supply","authors":"Hongda Wang, Zhipeng Jiao, Jianchun Xing, Qiliang Yang, Man Yang, Yutao Zhou, Jiubing Zhao","doi":"10.1049/esi2.12093","DOIUrl":"10.1049/esi2.12093","url":null,"abstract":"Battery energy storage system (BESS) is of great significance to ensure underground engineering (UE) microgrid to have reliable power supply. Distributed energy management is one of the solutions that can enhance the microgrid reliability by efficiently scheduling the distributed appliances (such as diesel generator, BESS) to accommodate various scenarios. A distributed energy management model is proposed, which can help in reliable power supply by prolonging the lifetime of BESS and reducing the load loss. Considering the different energy consumption needs and dispatching capabilities of three regions of the UE microgrid, the proposed energy management model distributed dispatches the three regions in UE microgrid. In addition, considering the relationship between the depth of discharge and lifetime, the proposed energy management model also contains the BESS lifetime extension model constructed with dynamic charge-discharge rate and dynamic bidirectional AC/DC converter efficiency. Based on the deterministic optimisation method, the optimal solution of the proposed energy management model is obtained. The effectiveness of the proposed energy management model is validated under six scenarios (that is grid connected mode, off grid mode, partial interconnection mode, interconnection mode, and independent modes with and without power exchange). The simulation results demonstrate that compared with the conventional model, the proposed model can reduce the operation cost by 6.46% and the load loss rate by 0.747%, which helps to improve the reliability of UE microgrid.","PeriodicalId":33288,"journal":{"name":"IET Energy Systems Integration","volume":"5 2","pages":"202-212"},"PeriodicalIF":2.4,"publicationDate":"2023-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/esi2.12093","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48597488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reducing carbon emissions and energy costs in multi-building facilities: A Co-optimisation approach 在多建筑设施中减少碳排放和能源成本:一种协同优化方法

IF 2.4

IET Energy Systems Integration Pub Date : 2023-01-09 DOI: 10.1049/esi2.12092

Akintonde Abbas, Badrul Chowdhury

{"title":"Reducing carbon emissions and energy costs in multi-building facilities: A Co-optimisation approach","authors":"Akintonde Abbas, Badrul Chowdhury","doi":"10.1049/esi2.12092","DOIUrl":"10.1049/esi2.12092","url":null,"abstract":"Commercial buildings remain one of the most significant consumers of energy. As such, any sustainable pathway to a zero-emissions future will need to pay close attention to emissions reduction in commercial buildings. An interesting category of commercial buildings is the multi-building commercial facility with different buildings collocated within a defined geographical area, serving different purposes and containing varying equipment types. While most existing facility management approaches focus on minimising energy costs and emissions at the level of each building, this work considers a different perspective where energy and emissions are co-optimised across all buildings within the facility. Illustrative case studies based on a multi-building facility consisting of individual buildings adapted from the United States Department of Energy's (DOE) Commercial Reference Buildings database are considered. Different diurnal and seasonal variations in building usage are also considered. Simulations are run using a Python-based commercial building simulation toolbox. Results indicate that the co-optimisation approach can indeed provide superlinear emissions reductions and energy cost savings while satisfying predefined comfort limits compared to when each building is separately optimised.","PeriodicalId":33288,"journal":{"name":"IET Energy Systems Integration","volume":"5 2","pages":"192-201"},"PeriodicalIF":2.4,"publicationDate":"2023-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/esi2.12092","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47101673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 PLL-equivalent model for low-frequency stability analysis of voltage source converter connected to weak grid 用于弱电网电压源变换器低频稳定性分析的PLL等效模型

IF 2.4

IET Energy Systems Integration Pub Date : 2022-12-29 DOI: 10.1049/esi2.12090

Xialin Li, Chen Zhang, Lin Zhu, Zhi Wang, Li Guo

引用次数: 1

Weak grid integrated solar photovoltaic-based distributed generation system proficient in supplying VAR requirement with current restriction 弱电网集成太阳能光伏分布式发电系统能够满足电流限制下的无功需求

IF 2.4

IET Energy Systems Integration Pub Date : 2022-12-27 DOI: 10.1049/esi2.12091

Subarni Pradhan, Bhim Singh, Bijaya Ketan Panigrahi

{"title":"Weak grid integrated solar photovoltaic-based distributed generation system proficient in supplying VAR requirement with current restriction","authors":"Subarni Pradhan, Bhim Singh, Bijaya Ketan Panigrahi","doi":"10.1049/esi2.12091","DOIUrl":"10.1049/esi2.12091","url":null,"abstract":"This study presents a grid interactive solar photovoltaic (PV) system proficient with low voltage ride through capability. When the supply voltage drops more than 10%, the solar PV system remains connected and continues to supply the active power to the loads as well as to the grid. Along with the active power supply, the solar PV array system supplies the reactive power for stabilising the system. Due to the supply of both the active and reactive powers, there is a chance for a grid fed inverter (GFI) current to exceed the maximum current limit. It may result in the tripping of inverter protection. Therefore, a current limiting logic is incorporated to keep the inverter current within the safe limit. The unbalanced voltages are responsible for circulation of negative sequence currents in the system. As the prime aim of the present work deals with the supply of positive sequence currents to the grid, it is required to estimate the positive and negative sequence voltages separately. Intending the estimation of sequence voltages from unbalanced supply voltages, a frequency adaptive higher order complex filter (FAHOCF) is used. A MATLAB model of grid interactive solar PV array is developed and simulated results are verified with test results.","PeriodicalId":33288,"journal":{"name":"IET Energy Systems Integration","volume":"5 1","pages":"15-28"},"PeriodicalIF":2.4,"publicationDate":"2022-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/esi2.12091","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41802181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1