International Journal of Electrical Power & Energy Systems最新文献_第4页

Optimal siting and sizing of battery energy storage systems in unbalanced distribution systems: A multi objective problem under uncertainty 不平衡配电系统中电池储能系统的优化选址和选型：不确定性下的多目标问题

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2024-10-24 DOI: 10.1016/j.ijepes.2024.110316

{"title":"Optimal siting and sizing of battery energy storage systems in unbalanced distribution systems: A multi objective problem under uncertainty","authors":"","doi":"10.1016/j.ijepes.2024.110316","DOIUrl":"10.1016/j.ijepes.2024.110316","url":null,"abstract":"<div><div>In this paper the siting and sizing problem of battery energy storage systems in unbalanced active distribution systems is formulated as a mixed-integer, non-linear, constrained multi objective (MO) optimization problem under uncertainties. The problem is cumbersome from the computational point of view due to the presence of intertemporal constraints, a great number of state variables and the presence of uncertainties in the problem input data. A new approach based on the trade-off/risk analysis is proposed to obtain with acceptable computational efforts a solution that may not be the optimal solution but represents a reasonable and robust compromise. We use the trade-off/risk analysis, because it was specifically developed for power system planning problems in which we deal with a wide range of options, with possible conflicting objectives, and with uncertainty and risk. The proposed approach includes new procedures to select an adequate set of planning alternatives to be considered in the trade-off/risk analysis framework and to assist the planning engineer when difficulties arise in setting probabilities of the input data. Numerical applications to an IEEE unbalanced test system demonstrate the effectiveness of the proposed procedure and indicate the best alternatives of storage systems in the range from 450 kW to 600 kW globally installed in a reduced set of nodes.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142538609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 low-cost strategy for systematically removing DC short-circuit currents in AC/DC-HDN 系统消除交直流高清网络直流短路电流的低成本策略

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2024-10-24 DOI: 10.1016/j.ijepes.2024.110321

{"title":"A low-cost strategy for systematically removing DC short-circuit currents in AC/DC-HDN","authors":"","doi":"10.1016/j.ijepes.2024.110321","DOIUrl":"10.1016/j.ijepes.2024.110321","url":null,"abstract":"<div><div>For any practically applied AC/DC hybrid distribution network (AC/DC-HDN), the hard issue of removing DC short-circuit currents must be solved by a cost-effective scheme. However, up to now, in the most published achievements of AC/DC-HDN, the systematic scheme to address the above issue is rarely found. This paper proposes a novel strategy with a low cost for solving this problem. The proposed strategy can: (i) greatly decrease the DC short-circuit current components flowing from the AC/DC converters to the fault point, (ii) fast switch off the paths of DC short-circuit current components from DG branches to the fault point, (iii) completely block the DC short-circuit current components that feed into the fault point from the capacitors paralleled on the DC ports of load branches. Also, in this paper, a new topology of DC/DC converter with a controlled zero-current output function is proposed for fast switching off the paths of DC short-circuit current components from DG branches to the fault point. The scheme of relay protection and automatic control matching with the proposed strategy is designed. The principles of the scheme and design are explained in detail. The simulation results verified the effectiveness of the proposed strategy are given.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142538607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Data-driven transient stability analysis using the Koopman operator 利用库普曼算子进行数据驱动的瞬态稳定性分析

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2024-10-23 DOI: 10.1016/j.ijepes.2024.110307

引用次数: 0

Temperature-dependent state estimation based on constrained alternating optimization for three-phase power networks considering transformer parameters 基于受限交替优化的三相电网温度相关状态估计（考虑变压器参数

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2024-10-23 DOI: 10.1016/j.ijepes.2024.110292

{"title":"Temperature-dependent state estimation based on constrained alternating optimization for three-phase power networks considering transformer parameters","authors":"","doi":"10.1016/j.ijepes.2024.110292","DOIUrl":"10.1016/j.ijepes.2024.110292","url":null,"abstract":"<div><div>This paper presents a three-phase power system state estimation method based on weighted least square criteria in which not only bus voltage phasors but also transformer parameters, i.e. its tap ratio and leakage admittance, as well as overhead transmission line conductor temperatures are considered as state variables. The method integrates the admittance matrix model of three-phase transformers and a weather dependent thermal model of the overhead transmission lines into the power system state estimation process, which is then formulated as a constrained nonlinear optimization problem. A solution technique based on constrained alternating optimization, suitable for the temperature-dependent state estimation considering the transformer’s parameters, is also proposed. The state estimation optimization is divided into two constrained sub-optimization problems, which are solved alternately until convergence conditions are satisfied. A predictor–corrector interior point based algorithm is applied for solving the sub-optimization problems. Several tests on modified IEEE 30-bus and 118-bus systems configured as three-phase test systems indicate that the proposed temperature-dependent state estimation significantly outperforms traditional methods.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142538604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Coordinative optimization for wind farms considering improved fatigue load index 考虑改进疲劳载荷指数的风电场协调优化

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2024-10-23 DOI: 10.1016/j.ijepes.2024.110282

{"title":"Coordinative optimization for wind farms considering improved fatigue load index","authors":"","doi":"10.1016/j.ijepes.2024.110282","DOIUrl":"10.1016/j.ijepes.2024.110282","url":null,"abstract":"<div><div>In the wind farm(WF), there exists a serious uneven distribution of damage equivalent load(DEL) on the wind turbine(WT), which increases the maintenance cost of wind power generation. Previous researches focus on a single objective such as the total or the standard deviation of fatigue loads for optimal control. To address these, this paper proposes a coordinative optimization by considering an improved fatigue load index. The coordinative optimization is achieved on both WF level and WT level. For WF level, a state-space model is built for the active power dispatch by utilizing small signal linearization. Then, an improved sensitivity analysis is performed to evaluate the fatigue load on the component of the tower and shaft. Further, a coordinative multi-objective function is designed, which minimizes the total DEL of the WF, and balances the individual fatigue load distribution of the WT. For WT level, an adaptive internal model control is proposed to suppress both tower vibrations and torque fluctuation of the main shaft. Several experiments are performed to verify the significance of the proposed method with the weight analysis of power and load coefficient. The comparison results reveals the superiority of the coordinative optimization in restraining the total DEL of the WF, balancing WF fatigue distribution, decreasing the DEL of the single WT, and satisfying the power reference tracking simultaneously.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142538605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Solving the security constrained unit commitment problem: Three novel approaches 解决安全受限的单位承诺问题：三种新方法

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2024-10-22 DOI: 10.1016/j.ijepes.2024.110213

引用次数: 0

A review on application of machine learning-based methods for power system inertia monitoring 基于机器学习的电力系统惯性监测方法应用综述

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2024-10-22 DOI: 10.1016/j.ijepes.2024.110279

{"title":"A review on application of machine learning-based methods for power system inertia monitoring","authors":"","doi":"10.1016/j.ijepes.2024.110279","DOIUrl":"10.1016/j.ijepes.2024.110279","url":null,"abstract":"<div><div>The modernization of electrical power systems is reflected through the integration of renewable energy resources, with the ultimate aim of creating a carbon–neutral world. However, this goal has brought new and complex challenges for the power system, with one of the most crucial issues which is the reduction of system inertia. The decrease in system inertia has led to severe difficulties in maintaining frequency stability. As a result, power system operators must continuously monitor the system inertia and when necessary to activate appropriate preventive measures, ensuring a reliable and secure operation of the power system. Fortunately, wide-area monitoring systems can provide the necessary measurements to monitor and analyze system behavior, assisting system operators in undertaking optimal actions. This paper provides a review of recent publications that apply machine learning (ML)-based methods for monitoring power system inertia. It also provides an overview of academic and industrial projects related to ML-based methods for inertia monitoring. Furthermore, the paper explores applications based on ML-based methods and inertia. Lastly, the paper briefly discusses future directions for the development of this research field.</div><div>© 2017 Elsevier Inc. All rights reserved.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142537868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Direct modulation in MMC-Based multiterminal hybrid Microgrid: A solution for arm capacitor voltage balancing under unbalanced power distribution 基于 MMC 的多终端混合微电网中的直接调制：不平衡配电下的臂式电容器电压平衡解决方案

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2024-10-22 DOI: 10.1016/j.ijepes.2024.110274

{"title":"Direct modulation in MMC-Based multiterminal hybrid Microgrid: A solution for arm capacitor voltage balancing under unbalanced power distribution","authors":"","doi":"10.1016/j.ijepes.2024.110274","DOIUrl":"10.1016/j.ijepes.2024.110274","url":null,"abstract":"<div><div>The rising interest in hybrid alternating current (AC)/ direct current (DC) microgrids among the global research community can be attributed to the widespread adoption of distributed generation systems (DGs). Therefore, this study applies the modular multilevel converter (MMC) in interconnected microgrids to serve as an interlinking converter involving the AC and DC systems. In this topology, the MMC consists of several submodules (SMs) where a low-voltage direct current (LVDC) microgrid is connected to the output of each SM through a dual active bridge (DAB) converter. As a result of using this topology, more LVDC microgrids can be linked, thus enhancing power transition feasibility. However, during unequal power distribution across LVDC microgrids, the arm capacitor voltage balancing becomes a challenging task and if left unsolved, it will result in unbalanced output voltage at the MMC terminal, thereby affecting the overall system. Therefore, this paper proposes the use of the direct modulation method that is capable of naturally producing fundamental and DC components of the circulating current within the MMC. These circulating current components are responsible for uniformly distributing the energy between the arms of the MMC and balancing the arm capacitor voltage. The effectiveness of the proposed method is further assessed through real-time simulation in the OPAL-RT (OP5700) environment. The findings of this study validate that direct modulation can maintain the optimal performance of a multiterminal hybrid microgrid based on MMC under unbalanced power conditions without applying additional controllers, thus simplifying the system design, and improving the overall efficiency.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142538719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Two-layer distributed control of hybrid AC/DC microgrids supplying nonlinear, unbalanced and constant-power loads 为非线性、不平衡和恒功率负载供电的交直流混合微电网的双层分布式控制

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2024-10-22 DOI: 10.1016/j.ijepes.2024.110298

{"title":"Two-layer distributed control of hybrid AC/DC microgrids supplying nonlinear, unbalanced and constant-power loads","authors":"","doi":"10.1016/j.ijepes.2024.110298","DOIUrl":"10.1016/j.ijepes.2024.110298","url":null,"abstract":"<div><div>Nonlinear, imbalanced, and constant power loads pose significant technical and power quality challenges in both AC and DC microgrids. Hybrid AC/DC microgrids further compound these complexities. In response, this paper presents a novel hierarchical control scheme comprising primary and secondary layers for such microgrids. The proposed scheme introduces innovative cooperative voltage and frequency secondary control methods, complementing conventional droop-based primary controllers. This hierarchical structure aims to provide acceptable voltage and frequency regulations, as well as power sharing in both AC and DC sub-grids, mitigating issues arising from various loads. Specifically, the DC sub-grid maintains its stability in the presence of constant power loads, while the AC bus output voltages maintain sinusoidal waveforms. Finally, we conduct digital time-domain simulation studies on a test microgrid system using the MATLAB/Simulink environment to assess the performance of the proposed control strategy. We compare the results with previously reported methods. The results demonstrate that the proposed methods effectively share power with reduced overshoot and faster convergence toward desired values compared to conventional controllers. Simulation analyses validate the superiority and efficacy of the proposed control scheme.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142538603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Triple-branch structure design and parameter optimization for supplementary damping controller of DFIG to suppress angular oscillation and reduce phase-locking error of PLL 用于 DFIG 辅助阻尼控制器的三分支结构设计和参数优化，以抑制角振荡并降低 PLL 锁相误差

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2024-10-22 DOI: 10.1016/j.ijepes.2024.110287

{"title":"Triple-branch structure design and parameter optimization for supplementary damping controller of DFIG to suppress angular oscillation and reduce phase-locking error of PLL","authors":"","doi":"10.1016/j.ijepes.2024.110287","DOIUrl":"10.1016/j.ijepes.2024.110287","url":null,"abstract":"<div><div>The supplementary damping controller (SDC) in the doubly fed induction generator (DFIG) is to suppress the angular oscillations among synchronous generators (SGs). Due to the phase-locking error, the coupling between the SDC and the phase-locked loop (PLL) weakens the suppression effect. This paper proposes a novel triple-branch SDC (TB-SDC) and two-stage optimization to reduce the phase locking error and suppress the angular oscillation. The originalities are, (1) An analytical model to describe the coupling between the SDC and the PLL considering the phase locking error is newly proposed. (2) A triple-branch SDC with an additional input from the PLL is newly proposed to suppress the angular oscillation while reducing the phase-locking error. (3) Based on 2-norm of the trajectory sensitivities, two evaluation indices are newly defined to quantify the impact of the TB-SDC parameters on the oscillation and the phase locking error, and select the critical parameters. (4) A two-stage optimization model is proposed to adjust the parameters of the TB-SDC, where the 1st step is to reduce the phase locking error and decide the input signals of the SDC-P and the SDC-Q, and the 2nd step is to improve the suppression effect and reduce the phase locking error. The simulation results verify the impact of the coupling, and validate the effectiveness and adaptability of the TB-SDC and optimization. © 2017 Elsevier Inc. All rights reserved.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142538602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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