IET Energy Systems Integration最新文献_第9页

Real-time voltage control of electric spring in islanded condition 孤岛状态下电弹簧的实时电压控制

IF 2.4

IET Energy Systems Integration Pub Date : 2023-06-06 DOI: 10.1049/esi2.12104

Deepsikha Panda, Pratim Kundu, Bharat Singh Rajpurohit

{"title":"Real-time voltage control of electric spring in islanded condition","authors":"Deepsikha Panda, Pratim Kundu, Bharat Singh Rajpurohit","doi":"10.1049/esi2.12104","DOIUrl":"10.1049/esi2.12104","url":null,"abstract":"Islanded microgrid network is sensitive to voltage and frequency fluctuations which becomes more vulnerable in the presence of external disturbance and the intermittent nature of Renewable Energy Sources (RESs). The “Electric Spring” (ES) is one of the most effective and efficient solutions for enhancing operational flexibility and RESs integration. A Self-Excited Induction Generator (SEIG) based Micro hydro system with ES, non-critical and critical loads is considered. Both non-critical and critical loads are connected in 2:1 ratio in parallel with SEIG. The concept of voltage-sensitive and non-sensitive loads and the “power demand following the supply” idea have been incorporated for pointing up the contribution of ES. The non-critical load coupled with a three-phase inverter acts like an ES and can be operated as a Smart Load (SL). SL can compensate the voltage deviation between demand-supply side, therefore mitigating the voltage fluctuations. The effectiveness of ES in terms of voltage regulation at the point of standard coupling has been achieved which improved the overall voltage profile of the hybrid microgrid system which can be observed from various test cases. A hardware in loop microgrid experimental platform is established and its results highlight the excellent performance of the proposed method.","PeriodicalId":33288,"journal":{"name":"IET Energy Systems Integration","volume":"5 3","pages":"307-319"},"PeriodicalIF":2.4,"publicationDate":"2023-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/esi2.12104","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49073817","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

Trilateral control for LCL filter-based system with single grid current sensor in weak grid 弱电网中基于LCL滤波器的单栅电流传感器系统的三边控制

IF 2.4

IET Energy Systems Integration Pub Date : 2023-06-05 DOI: 10.1049/esi2.12106

Khushboo Kumari, Amit Kumar Jain

{"title":"Trilateral control for LCL filter-based system with single grid current sensor in weak grid","authors":"Khushboo Kumari, Amit Kumar Jain","doi":"10.1049/esi2.12106","DOIUrl":"10.1049/esi2.12106","url":null,"abstract":"A trilateral control for LCL filter-based system is introduced by the authors with a single grid current sensor in weak grid conditions. The LCL filter increases the complexity when the uncertain nature of the grid comes into the picture. Moreover, the traditional three-loop control technique requires three current sensors on the inverter side, three voltage sensors to sense voltage across the capacitor, and three current sensors on the grid side combined for sensing. A novel trilateral control technique utilising a single sensor is implemented to sense the grid current. This technique has reduced a considerable number of current sensors and voltage sensors. The α axis of grid current is proportional to sensed ‘a’ phase grid current. The β current in the utility grid is acquired by employing the controller reference quantities of the grid current. The computation of another variable, that is, the current in the inverter side inductor and the voltage across the capacitor, is executed by an estimation algorithm. The proposed technique provides the feature of reducing implementation financial value and weight that reduces the complexity and size of hardware. The synchronisation technique is executed by a modified dual second-order generalised integrator digital phase-locked loop for the grid-connected converter. The implemented system offers the advantage of ease of implementation, good performance, and high stability. The validity of the proposed scheme in the implemented system is demonstrated by the simulated waveform obtained on the MATLAB/Simulink platform. Finally, the effectiveness of the proposed system is further justified by the experimental waveform procured from a prototype developed in the laboratory.","PeriodicalId":33288,"journal":{"name":"IET Energy Systems Integration","volume":"5 4","pages":"365-375"},"PeriodicalIF":2.4,"publicationDate":"2023-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/esi2.12106","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44051995","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 Mixed integer linear programming-based distributed energy management for networked microgrids considering network operational objectives and constraints 考虑网络运营目标和约束的基于混合整数线性规划的网络微电网分布式能源管理

IF 2.4

IET Energy Systems Integration Pub Date : 2023-05-30 DOI: 10.1049/esi2.12103

Guodong Liu, Maximiliano F. Ferrari, Yang Chen

{"title":"A Mixed integer linear programming-based distributed energy management for networked microgrids considering network operational objectives and constraints","authors":"Guodong Liu, Maximiliano F. Ferrari, Yang Chen","doi":"10.1049/esi2.12103","DOIUrl":"10.1049/esi2.12103","url":null,"abstract":"Mixed integer linear programming (MILP)–based distributed energy management for networked microgrids embedded modern distribution systems is proposed. Considering the diverse ownership of microgrids, distributed energy resources (DERs) that interface directly with utilities and responsive loads, an alternating direction method of multipliers–based distributed framework was formulated for the scheduling of networked microgrids embedded modern distribution systems by adjusting nodal price signals iteratively. In addition, to make the formulated optimization problems resolvable through more accessible and popular MILP solvers, different linearisation techniques were employed to transform the nonlinear terms into linear or mixed integer linear formats. The proposed MILP-based distributed method preserves all participants' autonomy (e.g., microgrids, DERs that interface directly with utilities and responsive loads), while incentivising them to actively participate in the distribution system operation with price signals. The proposed method is validated with results of numerical simulation using a modern distribution system consisting of multiple networked microgrids, DERs that interface directly with utilities, as well as responsive loads.","PeriodicalId":33288,"journal":{"name":"IET Energy Systems Integration","volume":"5 3","pages":"320-337"},"PeriodicalIF":2.4,"publicationDate":"2023-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/esi2.12103","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43001627","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

Risk-return optimised energy asset allocation in transmission-distribution system using tangency portfolio and Black–Litterman model 使用相切投资组合和Black–Litterman模型优化输电配电系统中的风险收益能源资产配置

IF 2.4

IET Energy Systems Integration Pub Date : 2023-05-18 DOI: 10.1049/esi2.12102

Jisma M, Vivek Mohan, Mini Shaji Thomas

{"title":"Risk-return optimised energy asset allocation in transmission-distribution system using tangency portfolio and Black–Litterman model","authors":"Jisma M, Vivek Mohan, Mini Shaji Thomas","doi":"10.1049/esi2.12102","DOIUrl":"10.1049/esi2.12102","url":null,"abstract":"The application of Markowitz and tangency portfolio and Black–Litterman models is extended by the authors to energy portfolio selection in transmission-distribution environments with high penetration of renewable energy. As Transmission System Operator (TSO) and Distribution System Operator (DSO) contextually take mutualistic or conflicting positions in their portfolio selection process, their risk-return interactions and behaviours depend on their subjective views on generation and operation. Here, the financial portfolio allocation tool Black–Litterman Model is adapted to incorporate subjective views of the operators to arrive at more intuitive portfolios. The best portfolios are searched within the acceptable risk-return search space of each operator defined by their Markowitz efficient frontiers (EF), for Pareto-optimising their profits. The tangency portfolio approach, which is generally used to determine the portfolio of risky and risk-free assets in finance, is used here to determine the portfolio of renewable (energy-risky) and fuel-based sources (energy-risk-free). The proposed methodology is adopted in an HV–MV interconnected test system operated by one TSO and two DSOs, having wind, solar, coal, gas and nuclear generation technologies. It is observed that completely customisable portfolios can be constructed for TSO and DSO based on their inherent financial and energy risk-return behaviours and posterior views.","PeriodicalId":33288,"journal":{"name":"IET Energy Systems Integration","volume":"5 3","pages":"290-306"},"PeriodicalIF":2.4,"publicationDate":"2023-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/esi2.12102","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44130554","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

Multi-scale coordinated optimal dispatch method of electricity-thermal-hydrogen integrated energy systems 电-热-氢一体化能源系统的多尺度协调优化调度方法

IF 2.4

IET Energy Systems Integration Pub Date : 2023-05-11 DOI: 10.1049/esi2.12100

Wanting Zheng, Hao Xiao, Ziqi Liu, Wei Pei, Mohammed Beshir

{"title":"Multi-scale coordinated optimal dispatch method of electricity-thermal-hydrogen integrated energy systems","authors":"Wanting Zheng, Hao Xiao, Ziqi Liu, Wei Pei, Mohammed Beshir","doi":"10.1049/esi2.12100","DOIUrl":"10.1049/esi2.12100","url":null,"abstract":"To achieve carbon neutrality, renewable energy-based power systems and hydrogen are increasingly being promoted. A novel electricity-thermal-hydrogen integrated energy system that combines new energy generation, multi-source load, and multiple energy storage is proposed by the authors. To address uncertainties in new energy output, and issues of untimely unit regulation response and large planning tracking errors, a multi-scale scheduling method based on model predictive control (MPC) was proposed. In the day-ahead dispatching stage, an optimal economic dispatching model was established with the lowest system operation cost as the optimisation objective. The model considers equipment investment, operation, maintenance, and peak-to-valley differences in electricity prices. In the intraday dispatching stage, an MPC-based intraday rolling optimisation correction strategy was proposed to cope with contact line power fluctuations caused by prediction errors of new energy and multi-source load. This strategy combines time-domain rolling and feedback correction of the real-time system state to eliminate the influence of uncertainty factors in the microgrid. The MPC-based intraday rolling optimal scheduling model was established in the form of a discrete state space and transformed into a quadratic planning problem to improve the efficiency and accuracy of the model solution. Finally, a typical microgrid was used as an example to verify the effectiveness of the proposed method. Results show that the contact line tracking error can be within 0.025 kW, and the single scheduling time was within 0.14 s.","PeriodicalId":33288,"journal":{"name":"IET Energy Systems Integration","volume":"5 3","pages":"275-289"},"PeriodicalIF":2.4,"publicationDate":"2023-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/esi2.12100","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49249505","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 day-ahead optimal scheduling model of an integrated energy system for a facility agricultural–industrial park 设施农工园区综合能源系统日前优化调度模型

IF 2.4

IET Energy Systems Integration Pub Date : 2023-05-02 DOI: 10.1049/esi2.12101

Wei Chen, Xuewu Chang, Jianing Li

引用次数: 0

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