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Enhancing renewable energy integration:A Gaussian-Bare-Bones Levy Cheetah Optimization Approach to Optimal Power Flow in Electrical Networks

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Computer Modeling in Engineering & Sciences 2024年第8期140卷 1339-1370页

作者： Ali S.Alghamdi Mohamed A.Zohdy Saad Aldoihi Department of Electrical Engineering College of EngineeringMajmaah UniversityAl-Majmaah11952Saudi Arabia Electrical and Computer Engineering Department Oakland UniversityRochesterMI48309USA Institute of Earth and Space Science King Abdulaziz City for Science and Technology(KACST)Riyadh11442Saudi Arabia Computer Science and Systems Engineering Institute Polytechnique de ParisPalaiseau CedexFrance

In the contemporary era,the global expansion of electrical grids is propelled by various renewable energy sources(RESs).Efficient integration of stochastic RESs and optimal power flow(OPF)management are critical for network *** study introduces an innovative solution,the Gaussian Bare-Bones Levy Cheetah Optimizer(GBBLCO),addressing OPF challenges in power generation systems with stochastic *** primary objective is to minimize the total operating costs of RESs,considering four functions:overall operating costs,voltage deviation management,emissions reduction,voltage stability index(VSI)and power loss ***,a carbon tax is included in the objective function to reduce carbon *** scrutiny,using modified IEEE 30-bus and IEEE 118-bus systems,validates GBBLCO’s superior performance in achieving optimal *** results demonstrate GBBLCO’s efficacy in six optimization scenarios:total cost with valve point effects,total cost with emission and carbon tax,total cost with prohibited operating zones,active power loss optimization,voltage deviation optimization and enhancing voltage stability index(VSI).GBBLCO outperforms conventional techniques in each scenario,showcasing rapid convergence and superior solution ***,GBBLCO navigates complexities introduced by valve point effects,adapts to environmental constraints,optimizes costs while considering prohibited operating zones,minimizes active power losses,and optimizes voltage deviation by enhancing the voltage stability index(VSI)*** research significantly contributes to advancing OPF,emphasizing GBBLCO’s improved global search capabilities and ability to address challenges related to local *** emerges as a versatile and robust optimization tool for diverse challenges in power systems,offering a promising solution for the evolving needs of renewable energy-integrated power grids.

关键词： renewable energy integration optimal power flow stochastic renewable energy sources gaussian-bare-bones levy cheetah optimizer electrical network optimization carbon tax optimization

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Impact of industrial virtual power plant on renewable energy integration

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Global energy Interconnection 2020年第6期3卷 545-552页

作者： Runze Liu Yu Liu Zhaoxia Jing School of Electric Power South China University of TechnologyGuangzhou 510641P.R.China

An industrial park is one of the typical en ergy con sumption schemes in power systems owing to the heavy in dustrial loads and their abilities to resp ond to electricity price cha ***,en ergy in tegrati on in the industrial sector is ***,the concept of industrial virtual power plant(IVPP)has been proposed to deal with such *** study demonstrates an IVPP model to man age resources in an eco-i ndustrial park,including en ergy storage systems,dema nd resp onse(DR)resources,and distributed *** addition,fuzzy theory is used to cha nge the deterministic system constraints to fuzzy parameters,considering the uncertainty of renewable energy,and fuzzy chance constraints are then set based on the credibility *** maximizi ng the daily ben efits of the IVPP owners in day-ahead markets,DR and energy storage systems can be scheduled ***,the energy between the grid and IVPP can flow in both directions:the surplus renewable electricity of IVPP can be sold in the market;when the electricity gen erated in side IVPP is not enough for its use,IVPP can also purchase power through the *** studies based on three win d-level scenarios dem on strate the efficie nt syn ergies betwee n IVPP *** validatio n results indicate that IVPP can optimize the supply and demand resources in in dustrial parks,thereby decarbonizing the power systems.

关键词： IVPP Virtual power plants Industrial loads renewable energy integration Fuzzy chanee constraint Credibility theory

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Engineering practices for the integration of large-scale renewable energy VSC-HVDC systems

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Global energy Interconnection 2020年第2期3卷 149-157页

作者： Yan Li Hongzhi Liu Xiaojie Fan Xinshou Tian China Electric Power Research Institute Haidian DistrictBeijing 100192P.R.China College of Electrical and Electronic Engineering North China Electric Power UniversityChangping DistrictBeijing 102206P.R.China.

With the continuous development of power electronic devices,intelligent control systems,and other technologies,the voltage level and transmission capacity of voltage source converter (VSC)-high-voltage direct current (HVDC) technology will continue to increase,while the system losses and costs will gradually ***,it can be foreseen that VSC-HVDC transmission technology will be more widely applied in future large-scale renewable energy development *** VSC-HVDC transmission technology can be used to overcome issues encountered by large-scale renewable energy transmission and integration projects,such as a weak local power grid,lack of support for synchronous power supply,and insufficient accommodation ***,this solution also faces many technical challenges because of the differences between renewable energy and traditional synchronous power generation *** on actual engineering practices that are used worldwide,this article analyzes the technical challenges encountered by integrating large-scale renewable energy systems that adopt the use of VSC-HVDC technology,while aiming to provide support for future research and engineering projects related to VSC-HVDC-based large-scale renewable energy integration projects.

关键词： VSC-HVDC renewable energy integration DC grid Engineering practice

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A distributed VSG control method for a battery energy storage system with a cascaded H-bridge in a grid-connected mode

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Global energy Interconnection 2022年第4期5卷 343-352页

作者： Yichi Cai Donglian Qi Electrical and Electronic Engineering Department Zhejiang UniversityNo.38.Zheda Rd.Hangzhou310027ZhejiangP.R.China

With the high penetration of renewable energy,new challenges,such as power fluctuation suppression and inertial support capability,have arisen in the power *** energy storage systems play an essential role in renewable energy *** this paper,a distributed virtual synchronous generator(VSG)control method for a battery energy storage system(BESS)with a cascaded H-bridge converter in a grid-connected mode is *** VSG is developed without communication dependence,and state-of-charge(SOC)balancing control is achieved using the distributed average *** to the low varying speed of SOC,the bandwidth of the distributed communication networks is extremely slow,which decreases the ***,the proposed method can simultaneously provide inertial support and accurate SOC *** stability is also proved using root locus ***,simulations under different conditions are carried out to verify the effectiveness of the proposed method.

关键词： VSG Cascaded H-bridge converters Battery energy storage system renewable energy integration

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Phasor Measurement Unit Incorporated Adaptive Out-of-step Protection of Synchronous Generator

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Journal of Modern Power Systems and Clean energy 2021年第5期9卷 1032-1042页

作者： Jigneshkumar P.Desai Vijay H.Makwana Department of Electrical Engineering Sarvajanik College of Engineering and TechnologySurat-395001India Gujarat Technological University Ahmedabad-382424India Department of Electrical Engineering G.H.Patel College of Engineering and TechnologyAnand-388120India

The existing out-of-step(OOS)protection schemes have proven to be deficient in the prevention of significant *** protection schemes must not operate in stable power swing,and rapidly isolate an asynchronous generator or group of generators from the rest of the power system in case of unstable power *** paper proposes a novel phasor measurement unit(PMU)incorporating a polygon-shaped graphical algorithm for OOS protection of the synchronous *** unique PMU-based logic works further to classify the type of swing once the graphical scheme detects it,which can identify the complex power swing produced in the modern power *** proposed algorithm can take the correct relaying decision in the event of power swing due to renewable energy integration,load encroachment,and transient *** this paper,the original and modified Kundur two-area system with a power system stabilizer(PSS)is used to test the proposed *** the end,it provides assessment results of the proposed relay on the Indian power system during the blackout in July *** results demonstrate that the proposed algorithm is fast,accurate,and adaptive in the modern power system and shows better performance than the existing OOS protection schemes.

关键词： Out-of-step protection phasor measurement unit(PMU) power swing detection renewable energy integration

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A Mixed-integer SDP Solution to Distributionally Robust Unit Commitment with Second Order Moment Constraints

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CSEE Journal of Power and energy Systems 2020年第2期6卷 374-383页

作者： Xiaodong Zheng Haoyong Chen Yan Xu Zhengmao Li Zhenjia Lin Zipeng Liang School of Electric Power Engineering South China University of TechnologyGuangzhou 510641China School of Electrical and Electronic Engineering Nanyang Technological UniversitySingapore

A power system unit commitment(UC)problem considering uncertainties of renewable energy sources is investigated in this paper,through a distributionally robust optimization *** assume that the first and second order moments of stochastic parameters can be inferred from historical data,and then employed to model the set of probability *** resulting problem is a two-stage distributionally robust unit commitment with second order moment constraints,and it can be recast as a mixed-integer semidefinite programming(MI-SDP)with finite *** solution algorithm of the problem comprises solving a series of relaxed MI-SDPs and a subroutine of feasibility checking and vertex *** on the verification of strong duality of the semidefinite programming(SDP)problems,we propose a cutting plane algorithm for solving the MI-SDPs;we also introduce an SDP relaxation for the feasibility checking problem,which is an intractable biconvex *** results on the IEEE 6-bus system are presented,showing that without any tuning of parameters,the real-time operation cost of distributionally robust UC method outperforms those of deterministic UC and two-stage robust UC methods in general,and our method also enjoys higher reliability of dispatch operation.

关键词： Distributionally robust optimization mixedinteger semidefinite programming probability distribution renewable energy integration unit commitment

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Climate change and future power systems: the importance of energy storage in reduced-hydropower systems in the American Southwest

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Clean energy 2019年第4期3卷 241-250页

作者： Karin Wadsack Thomas L.Acker School of Earth&Sustainability Box 4099Northern Arizona UniversityFlagstaffAZ 86011-4099USA Department of Mechanical Engineering Northern Arizona UniversityFlagstaffAZ 86011USA

Power systems are responding to climate change both through efforts to reduce greenhouse-gas emissions and through adaptive responses to the effects of climate change,such as changes in hydroelectric *** changes,experienced together,may cause new patterns in plant operations or pollutant *** scenarios representing future climate change mitigation and adaptation in the power sector were explored using the PLEXOS production-cost model,with a focus on plant utilization and behaviour,total system-operating costs and total CO_(2) ***,the effect of introducing widespread utility-scale energy storage into these scenarios was quantified in terms of these same *** increases in variable renewable penetration combined with extreme reduction of hydroelectric generation in the American Southwest(based on climate modelling in the Colorado River basin and actual drought experience in California)caused significant increases in thermal plant start-up/shutdown *** introduction of storage significantly reduced this cycling,without a material increase in CO_(2) *** introduced on even a modest scale can provide considerable flexibility under a range of future power-system circumstances that might be experienced due to climate change.

关键词： renewable energy integration power-system decarbonization production-cost modelling energy storage climate change

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Characteristic Analysis of UHVAC/DC Hybrid Power Grids and Construction of Power System Protection

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CSEE Journal of Power and energy Systems 2017年第4期3卷 325-333页

作者： Yinbiao Shu Guoping Chen Zhao Yu Jianyun Zhang Chao Wang Chao Zheng State Grid Corporation of China Beijing 100031China China Electric Power Research Institute Beijing 100192China

Strong DC coupling with weak AC and large-scale renewable energy integration are the two significant characteristics of ultra-high-voltage AC/DC(UHVAC/DC)hybrid power grids in *** coupling between AC and DC grids and the different integration performance of renewable energy sources have profoundly changed the stability characteristics of the power *** traditional stability control system is inadequate for the stability control of UHVAC/DC power *** paper analyzes the requirements for constructing an integrated defense system in a UHVAC/DC hybrid power grid(*** system protection).The definition,connotation,and designing principles of power system protection are put *** relationship between the power system protection and the traditional three-defense lines is *** design principles,general hardware structure and main functions of a power system protection are *** problems and technologies are specified in the construction of the power system protection.

关键词： Design scheme general structure power system protection key technology renewable energy integration security and stability strong DC coupling with weak AC UHVAC/DC hybrid power grid

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A Demand Response System for Wind Power integration: Greenhouse Gas Mitigation and Reduction of Generator Cycling

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CSEE Journal of Power and energy Systems 2018年第2期4卷 121-129页

作者： Torsten Broeer Francis K.Tuffner Anaissia Franca Nedjib Djilali Exro Technologies Inc. 1400-1111 West Georgia StreetVancouver BC Canada V6E 4M3 Pacific Northwest National Laboratory P.O.Box 999RichlandWA 99352United States Institute for Integrated energy Systems Department of Mechanical EngineeringUniversity of VictoriaP.O.Box 3055STN CSCVictoriaBCCanada V8W 3P6

A smart grid power system for a small region consisting of 1,000 residential homes with electric heating appliances from the demand side,and a generic generation mix of nuclear,hydro,coal,gas and oil-based generators representing the supply side,is investigated using agent-based *** simulation includes a transactive load control in a real-time pricing electricity *** study investigates the impacts of adding wind power and demand response(DR)on both greenhouse gas(GHG)emissions and generator cycling *** results demonstrate and quantify the effectiveness of DR in mitigating the variability of renewable *** extent to which greenhouse gas emissions can be mitigated is found to be highly dependent on the mix of generators and their operational capacity *** is expected that the effects of demand response on electricity use can reduce dependency on fossil fuel-based electricity ***,the anticipated mitigation of GHG emissions is found to dependent on the number and efficiency of fossil fuel generators,and especially on the capacity factor at which they ***,if a generator(the marginal seller)is forced to use less efficient fossil fuel power generation schemes,it will result in higher GHG *** simulations show that DR can yield a small reduction in GHG emissions,but also lead to a smaller increase in emissions in circumstances when,for example,a generator(the marginal seller)is forced to use less efficient fossil fuel power generation ***,DR is shown to enhance overall system operation,particularly by facilitating increased penetration of variable renewable electricity generation without jeopardizing grid operation *** reduces the amount of generator cycling by an increased order of magnitude,thereby reducing wear and tear,improving generator efficiency,and avoiding the need for additional operating *** effectiveness of DR for these uses depends on the p

关键词： Demand response generator cycling greenhouse gas emissions renewable energy integration real-time pricing(RTP)electricity market smart grid

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Towards Fully renewable energy Systems:Experience and Trends in Denmark

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CSEE Journal of Power and energy Systems 2017年第1期3卷 26-35页

作者： Pierre Pinson Lesia Mitridati Christos Ordoudis JacobØstergaard Technical University of Denmark Department of Electrical EngineeringCentre for Electric Power and EnergyKgs.LyngbyDenmark

Deployment of renewable energy generation capacities and integration of their power production into existing power systems has become a global trend,with a common set of operational challenges stemming from variability and limited predictability of power generation from,e.g.,wind and *** is a country that invested early in wind energy,rapidly proposing very ambitious goals for the future of its energy system and global energy *** the case of Denmark is specific due to its limited size and good interconnections,there may still be a lot to learn from the way operational practice has evolved,also from shifting towards a liberalized electricity market environment,and more generally from going along with other technological and societal *** aim of this paper is to give an overview of recent and current initiatives in Denmark that contributes towards a goal of reaching a fully renewable energy system.

关键词： Coordination energy markets flexibility integrated energy systems renewable energy integration

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