检索结果-内蒙古大学图书馆

A Backstepping Integral Sliding Mode Controller Design for Partial Feedback Linearized Models of Synchronous Generators in Simple power systems to Improve the Transient Stability 2

A Backstepping Integral Sliding Mode Controller Design for P...

引用

2nd IEEE International Conference on Smart Technologies for power, Energy and Control, STPEC 2021

作者： Pramanik, M.A.H. Roy, T.K. Anower, M.S. Ghosh, S.K. Mahmud, M.A. Rajshahi University of Engineering Technology Department of Electrical Computer Engineering Rajshahi6204 Bangladesh Rajshahi University of Engineering Technology Department of Electronics Telecommunication Engineering Rajshahi Bangladesh Rajshahi University of Engineering Technology Department of Electrical Electronic Engineering Rajshahi6204 Bangladesh Northumbria University Electrical Power Control Systems Research Group Faculty of Engineering and Environment Newcastle United Kingdom

ISBN: (纸本)9781665443197

This paper proposes a backstepping integral sliding mode controller (BISMC) based on the partial feedback linearization (PFBL) of the detailed model of synchronous generators (SGs) in simple power networks. The proposed scheme is designed to obtain the excitation control input using the detailed model of SGs in a simple power system where the PFBL is used to simplify the model. The BISMC is employed on this simplified model to ensure the transient stability during large disturbances. The inherent property of the BISMC tackles the chattering and overcomes the parameter sensitivity problem of the PFBL scheme. Simulation studies are conducted under different operating situations to justify the effectiveness of the proposed PFBL-BISMC over a partial feedback linearizing controller (PFBLC). © 2021 IEEE.

关键词： Synchronous generators

来源：评论

学校读者我要写书评

暂无评论

A Composite Nonlinear Controller Design to Enhance the Large-Signal Stability of a DC Distribution System with Constant power Loads 2

A Composite Nonlinear Controller Design to Enhance the Large...

引用

2nd IEEE International Conference on Smart Technologies for power, Energy and Control, STPEC 2021

作者： Ghosh, S.K. Roy, T.K. Pramanik, M.A.H. Mahmud, M.A. Rajshahi University of Engineering Technology Department of Electrical Electronic Engineering Rajshahi6204 Bangladesh Rajshahi University of Engineering Technology Department of Electronics Telecommunication Engineering Rajshahi6204 Bangladesh Rajshahi University of Engineering Technology Department of Electrical Computer Engineering Rajshahi6204 Bangladesh Northumbria University Newcastle Electrical Power Control Systems Research Group Faculty of Engineering and Environment United Kingdom

ISBN: (纸本)9781665443197

A composite backstepping integral sliding mode controller (BISMC) is proposed in this work for a DC-DC boost converter feeding a constant power load (CPL) in a simple DC distribution system. Here, the main objective is to ensure the large-signal stability with wide variations in operating regions. The proposed BISMC is designed based on the feedback linearized model of the DC-DC boost converter with a CPL where the average state-space model is exactly linearized. The use of exact feedback linearization overcomes the non-minimum phase problem of a DC-DC boost converter due to the presence of the CPL that exhibits negative impedance characteristics. The control law is obtained using the combination of backstepping and integral sliding mode control schemes where both approaches ensure the faster convergence of errors for all states and the integral action on the sliding surface is designed in such a fashion that will ensure the constant frequency operation of the power converter feeding the CPL while eliminating the variable frequency associated problem of the existing controllers. In addition, the stability of the whole system is analyzed through the Lyapunov stability theory. Numerical simulations are conducted to verify the performance of the designed composite nonlinear controller whose performance is also compared with a double-loop proportional integral (PI) controller to verify the superiority of the designed controller. © 2021 IEEE.

关键词： Backstepping

来源：评论

学校读者我要写书评

暂无评论

Reactive power compensator placement using flower pollination algorithm

Reactive power compensator placement using flower pollinatio...

引用

Energy Technologies for Future Grids (ETFG), IEEE International Conference on

作者： Ardiaty Arief Hasniaty A. Muhammad Bachtiar Nappu Tajuddin Waris Andi Nur Aulia Azhar Mangkona Arjun Arjun Ayu Indryani Erwin Erwin Department of Electrical Engineering Power and Energy Systems Research Group Faculty of Engineering Hasanuddin University Gowa Indonesia PT. PLN. (Persero) Education and Training Center (Indonesian State Electricity Company) South Jakarta Indonesia

Reactive power compensator placement is challenging in distribution systems due to several complex factors and considerations, specifically the complex topology of the distribution network and it involves non-convex optimization problems. Therefore, in this study, the allocation of reactive power compensation devices is proposed by using a flower pollination algorithm (FPA) for decreasing active power losses in a distribution network. The objective of this work is to minimalize the total network power losses by optimally defining the position and capacity of the reactive power compensators, in addition to improving the voltage profile. The proposed approach was applied at the IEEE 33 bus radial distribution network (RDN) for single and multi-units compensation. The results attained are compared with several recent optimization approaches. The results show that FPA is an effectual optimization method for finding solutions for reactive compensator placement issues.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Modelling and Evaluating Capability of Battery Storage systems to Provide Extreme Event Services to the DSO: Case Study of Croatia

Modelling and Evaluating Capability of Battery Storage Syste...

引用

Mediterranean Electrotechnical Conference (MELECON)

作者： Bojana Barać Matija Kostelac Ivan Pavić Tomislav Capuder Još ko Graš o Anton Maruš ić Tomislav Koledić Josipa Bariš in Department of Energy and Power Systems University of Zagreb Faculty of Electrical Engineering and Computing Zagreb Croatia HEP DSO Ltd Elektra Zagreb Croatia

ISBN: (数字)9781665442800

ISBN: (纸本)9781665442817

The City of Zagreb in Croatia and its surroundings have experienced two strong earthquakes within nine months of 2020. Putting this in the context of the increased workload of healthcare facilities due to Covid-19, the distribution system operator (DSO) is encouraged to look for unconventional solutions such as integrating the battery energy storage system (BESS) to supply healthcare facilities during network fault conditions or other extreme network events. The BESS size and location are determined by optimization model, while the control system of the BESS converter, based on the virtual synchronous machine (VSM) concept, is define to test BESS ability to supply critical consumers in the off-grid mode. The models are tested and verified on several real world situations in Zagreb MV distribution network. Future developments and scenarios are also simulated to verify the robustness of the proposed investment.

关键词： COVID-19 Urban areas Earthquakes Medical services Robustness Batteries Synchronous machines

来源：评论

学校读者我要写书评

暂无评论

Application of artificial intelligence and red-tailed hawk optimization for boosting biohydrogen production from microalgae

引用

International Journal of Thermofluids 2024年 24卷

作者： Rezk, Hegazy Alahmer, Ali Olabi, Abdul Ghani Sayed, Enas Taha Department of Electrical Engineering College of Engineering in Wadi Alddawasir Prince Sattam bin Abdulaziz University Saudi Arabia Department of Mechanical Engineering Tuskegee University TuskegeeAL36088 United States Sustainable Energy & Power Systems Research Centre RISE University of Sharjah SharjahP.O. Box 27272 United Arab Emirates Chemical Engineering Department Faculty of Engineering Minia University Elminia Egypt

Enhancing biohydrogen production from microalgae is crucial in addressing environmental and energy challenges. It provides a sustainable, clean energy source while reducing greenhouse gas emissions. Moreover, it advances microalgae-based biotechnology, enabling innovative biofuel production and ecological revitalization. The main target of this study is to develop a robust ANFIS model to simulate the biohydrogen production process from microalgae within photobioreactors. The study focuses on enhancing hydrogen yield by optimizing three critical process parameters: sulfur concentration (%), run time (hours), and wet biomass concentration (g/L). Initially, an adaptive neuro-fuzzy inference system (ANFIS) model for biohydrogen production process is constructed based on empirical data. Subsequently, the red-tailed hawk algorithm (RTH) is used to determine the optimal values for the process parameters, corresponding to maximum hydrogen yield. The performance of ANFIS model in predicting hydrogen yield is assessed using root mean square error (RMSE) and coefficient-of-determination (R2) values. The obtained RMSE values for training and testing data are 2.8477 × 10−05 and 1.2807, respectively, while the corresponding R2 values are 1.0 and 0.9911 for training and testing. The introduction of fuzzy logic into the model significantly improves its predictive accuracy, as evidenced by the drop in RMSE from 10.79 with ANOVA to 0.7159 with ANFIS, representing a substantial 93.4 % decrease. The remarkable precision of the ANFIS model, indicated by its low RMSE and high R2 values, underscores the success of the modeling stage. The combination between ANFIS with the RTH technique yields impressive results, leading to a hydrogen yield enhancement of 6.87 % and 26.65 % when compared to both measured data and ANOVA. © 2024

关键词： Microalgae

来源：评论

学校读者我要写书评

暂无评论

Options for Application of Distributed Ledger Technologies in Development and Operation of Energy Communities

Options for Application of Distributed Ledger Technologies i...

引用

International Multidisciplinary Conference on Computer and Energy Science (SpliTech)

作者： Erica Svetec Lin Herenč ić Alen Hrga Green Energy Cooperative (ZEZ) Zagreb Croatia Department of Energy and Power Systems Faculty of Electrical Engineering and Computing University of Zagreb Zagreb Croatia

ISBN: (纸本)9781665488280

Deep integration of variable renewable energy sources in electrical power systems requires widespread use of digital technologies and novel citizen-oriented business models. The emergence of distributed ledger technologies (DLTs) has spurred the development of pilot projects and the assessment of the opportunities for the application of DLTs in the energy sector. In this paper, we examine DLTs considering their key features and applications in the energy sector, with a focus on their potential use in energy communities. As a case study, we present the pilot site in the city of Križevci in Croatia, where an energy community is being established. Based on this case, we assess the potential use cases, advantages, and possible drawbacks in the application of DLTs in comparison with the business-as-usual non-DLT solutions.

关键词： Renewable energy sources Distributed ledger Urban areas Laboratories power systems Security Forecasting

来源：评论

学校读者我要写书评

暂无评论

Possibilities and limits of diagnostic methods for power transformers in service

Possibilities and limits of diagnostic methods for power tra...

引用

23rd International Symposium on High Voltage engineering (ISH 2023)

作者： Sebastian Schreiter Holger Lohmeyer Peter Werle HTWK Leipzig Leipzig University of Applied Science Faculty of Electrical Engineering and Information Technology Department of Electric Power Systems Germany Hitachi Energy Transformer Service Centre Halle Oil Lab Halle Germany Leibniz University Hannover Institute of Electric Power Systems Division of High Voltage Engineering and Asset Management Schering-Institute Hannover Germany

ISBN: (数字)9781839539923

The detection of possible faults in an early state is of elementary interest to operators of transformers in order to avoid unplanned outages. Such unplanned failures lead to the interruption of energy supply or even loss of production. Therefore, a large number of diagnostic methods are available such as oil analysis and electrical measurements up to high-voltage tests on site. For this reason, it is necessary for operators to select the meaningful diagnostic procedures in each case. In this contribution investigation are discussed concerning the question which diagnostic procedures or which combination of procedures can be used to detect faults reliable. This was done based on a large population of transformers in service.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Startup Implementation in Universal power Electronics Interface with Dual-Standard Output for DC Microgrid Applications

Startup Implementation in Universal Power Electronics Interf...

引用

Compatibility in power Electronics (CPE)

作者： Sachin Chauhan Salman Khan Andrii Chub Dmitri Vinnikov Bernd Wunder Freddy Flores-Bahamonde Department of Electrical Power Engineering and Mechatronics Tallinn University of Technology Tallinn Estonia DC Grids Fraunhofer Institute for Integrated Systems and Device Technology (IISB) Erlangen Germany Energy Transformation Center Faculty of Enigineering Universidad Andrés Bello Providencia Santiago Chile

ISBN: (数字)9798331515171

ISBN: (纸本)9798331515188

This work studies soft start implementation in the universal power electronics interface (UPEI) with dual-standard output for dc microgrid applications (350/700V). It is based on a series-resonant converter designed to operate with quality factors below unity at a constant switching frequency. It must pre-charge output capacitors to prevent inrush current and false triggering of protection devices when connecting to a dc microgrid. This work proposes a soft start implementation method to limit the inrush currents by implementing a simple PI-based topology morphing control. Also, it requires an extra safety switch added between the output capacitors of the converter and the output dc port. This paper compares converter startup operation with/without the soft start by initial charging of its output capacitor. The verification of the proposed strategy has been performed using PSIM.

关键词： Switching frequency Capacitors Surge protection Microgrids Switches power electronics Topology Protection Inrush current Switching circuits

来源：评论

学校读者我要写书评

暂无评论

A step-by-step full-order sliding mode controller design for standalone inverter-interfaced cleaner renewable energy sources

引用

Cleaner Energy systems 2023年 6卷

作者： Barzegar-Kalashani, Mostafa Mahmud, Md Apel Tousi, Behrouz Farhadi-Kangarlu, Mohammad Faculty of Electrical and Computer Engineering Urmia University Urmia Iran Electrical Power & Energy Systems Research Lab (EPESRL) School of Engineering Deakin University Geelong 3216 VIC Australia Faculty of Engineering and Environment Northumbria University Newcastle NE1 8ST United Kingdom

power electronic inverters are one of the most significant components for the integration of clean energy systems and the proper control of these power electronic interfaces helps to enhance power quality. This paper presents a robust step-by-step full-order sliding mode voltage control strategy for standalone single-phase inverters that can be interfaced with cleaner renewable energy sources. The proposed controller employs a cascaded method through outer- and inner-loops to facilitate tracking of the desired load voltage. In contrast to the most commonly used sliding mode techniques for interfacing these cleaner energy sources, which usually utilize the canonical-form of the system's state-space model, the designed controller uses a block-controllable model that mitigates unwanted noises. To design the controller, the capacitor voltage and the inductor current of the LC filter are measured to be employed in the outer second-order sliding mode voltage control loop and the inner first-order sliding mode current control loop, respectively. The utilization of such full-order sliding surfaces in each step effectively reduces the chattering in the control signals as well as facilitates the transient and steady-state responses with less harmonic distortion and thereby, promoting the effective integration of renewable energy sources. To verify the performance of the proposed controller under various loading conditions as external disturbances, a 2.2 kW standalone single-phase inverter is simulated using MATLAB/Simulink platform along with a microcontroller-based processor-in-loop through the digital signal processing. In terms of internal disturbances, the proposed controller is also tested under different filter parameters’ variations over a wider range. The results indicate a better alignment for coupling with clean energy sources and the comparisons with other control techniques show better performance of the proposed controller. © 2023 The Author(s)

关键词： Full-order sliding mode controller Inverter control Islanded operation Robustness Step-by-step controller

来源：评论

学校读者我要写书评

暂无评论

Energy and Reserve Scheduling Based on Security Constrained Convex Optimal power Flow Considering Wind power Generation in Europe

Energy and Reserve Scheduling Based on Security Constrained ...

引用

Sustainable power and Energy Conference (iSPEC)

作者： Zhao Yuan Electrical Power Systems Laboratory Faculty of Electrical and Computer Engineering University of Iceland Reykjavik Iceland

ISBN: (纸本)9781665414401

Based on security constrained convex optimal power flow (SC-COPF), this paper proposes an energy and operational reserve scheduling approach for the power system. The proposed approach is capable of scheduling energy and operational reserve dynamically according to the power load forecast and the power generation from renewable energy. Reserve requirements to keep the power system in the acceptable security level is equivalently formulated as the linear constraints in the SC-COPF model. The reserve requirements are considered in a statistical way which is a common practice in the power system operations in Europe. For example, the practice in Switzerland of reserve scheduling is to ensure that the maximum probability of power insufficiency should be less than 0.2%. The objective is to minimize the economic cost of the energy production and the reserve provision. The convex optimal power flow (COPF) is used to model the AC power flows of the power network. The capacity constraints of transmission lines are considered in our SC-COPF model by equivalently constraining the power loss variables. The proposed approach is validated by using the modified European transmission network 1354pegase test case. The power load forecast and power generation from renewable energy data from Réseau de Transport d’EÉlectricite (RTE) in France are used for the validation. Numerical results show efficiency of our approach to dynamically schedule the energy and reserve.

关键词： Renewable energy sources Europe Production Wind power generation Dynamic scheduling Mathematical models Numerical models

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：