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CSEE Journal of Power and Energy Systems 2024年第1期10卷 427-431页

作者： Chao Ren Han Yu Yan Xu zhao yang dong School of Computer Science and Engineering Nanyang Technological UniversitySingapore School of Electrical and Electronic Engineering Nanyang Technological UniversitySingapore

This letter proposes a reliable transfer learning(RTL)method for pre-fault dynamic security assessment(DSA)in power systems to improve DSA performance in the presence of potentially related unknown *** takes individual discrepancies into consideration and can handle unknown faults with incomplete *** experiment results demonstrate high DSA accuracy and computational efficiency of the proposed RTL *** analysis shows RTL can guarantee system performance.

关键词： Adversarial training dynamic security assessment maximum classifier discrepancy missing data transfer learning

Achieving 500X Acceleration for Adversarial Robustness Verification of Tree-Based Smart Grid Dynamic Security Assessment

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IEEE/CAA Journal of Automatica Sinica 2024年第3期11卷 800-802页

作者： Chao Ren Chunran Zou Zehui Xiong Han Yu zhao-yang dong Niyato Dusit Nanyang Technological University Singapore 639798Singapore Nanjing University of Aeronautics and Astronautics Nanjing 211106China Singapore University of Technology and Design Singapore 487372Singapore

Dear Editor,This letter presents a novel and efficient adversarial robustness verification method for tree-based smart grid dynamic security assessment(DSA).Based on tree algorithms technique,the data-driven smart gri... 详细信息

关键词： Smart smart Dynamic

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基础教育写作教学方法论研究审思

河北民族师范学院学报 2024年第2期44卷 111-115页

作者：赵东阳河北民族师范学院教师教育学院河北承德067000

基础教育写作教学方法论研究,从世界范围来看,历经结果写作、过程写作、交际语境写作三个阶段。每个阶段,都贡献了有价值的方法论,前后相继,发展创新。在西方,各阶段研究成果能够及时得到推广,并对教学产生深远影响。在我国,各阶段研究... 详细信息

基础教育写作教学方法论研究,从世界范围来看,历经结果写作、过程写作、交际语境写作三个阶段。每个阶段,都贡献了有价值的方法论,前后相继,发展创新。在西方,各阶段研究成果能够及时得到推广,并对教学产生深远影响。在我国,各阶段研究虽然富有成果,但因为传统写作理念影响,至今“文章写作”理念,仍然深深影响着基础教育写作教学实践,“过程写作”“交际语境写作”在课程和教学中往往仅是作为概念形式存在,对写作教学影响有限。

关键词：基础教育写作教学方法论写作教学模式

Marginal Bottleneck Identification in Power System Considering Correlated Wind Power Prediction Errors

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Journal of Modern Power Systems and Clean Energy 2020年第1期8卷 187-192页

作者： Bin Liu Ke Meng zhao yang dong Wang Zhang School of Electrical Engineering and Telecommunications The University of New South WalesSydney 2052Australia

This letter investigates how to identify the marginal bottleneck,which is defined as the constraint most likely to be violated with the increasing wind generation uncertainty of power system in real-time *** presented method takes the correlation of wind power prediction error(WPPE)into account,leading to an ellipsoidal formulation of wind power generation region(WGR).Based on constructed WGR,the identification procedure is formulated as a max-max-min problem,which is solved by the algorithm based on iteration linear program with the proposed method to select appropriate initial points of ***,two cases are tested,demonstrating the efficacy and efficiency of the procedure to identify marginal bottleneck.

关键词： Bottleneck elliptical distribution hyperbolic distribution wind power accommodation

Optimal operation of integrated energy system including power thermal and gas subsystems

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Frontiers in Energy 2022年第1期16卷 105-120页

作者： Tongming LIU Wang ZHANG Yubin JIA zhao yang dong Digital Grid Futures Institute The University of New South WalesSydney NSW-2052Australia School of Automation Southeast UniversityNanjing 210000China School of Electrical&Electronics Engineering Nanyang Technological UniversitySingapore 639798Singapore

As a form of hybrid multi-energy systems,the integrated energy system contains different forms of energy such as power,thermal,and gas which meet the load of various energy *** mainly on model building and optimal operation of the integrated energy system,in this paper,the dist-flow method is applied to quickly calculate the power flow and the gas system model is built by the analogy of the power system *** addition,the piecewise linearization method is applied to solve the quadratic Weymouth gas flow equation,and the alternating direction method of multipliers(ADMM)method is applied to narrow the optimal results of each subsystem at the coupling *** entire system reaches its optimal operation through multiple *** power-thermal-gas integrated energy system used in the case study includes an IEEE-33 bus power system,a Belgian 20 node natural gas system,and a six node thermal ***-based calculations and comparison of the results under different scenarios prove that the power-thermal-gas integrated energy system enhances the flexibility and stability of the system as well as reducing system operating costs to some extent.

关键词： integrated energy system power-to-gas dist-flow piecewise linearization alternating direction method of multipliers(ADMM)

Pareto Front Analysis Method for Optimization of PV Inverter Based Volt/Var Control Considering Inverter Lifetime

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CSEE Journal of Power and Energy Systems 2023年第1期9卷 111-121页

作者： Qingmian Chai Cuo Zhang Yan Xu zhao yang dong Rui Zhang School of Electrical Engineering and Telecommunications The University of New South WalesSydneyNSW 2052Australia School of Electrical and Information Engineering The University of SydneySydneyNSW 2006Australia School of Electrical and Electronic Engineering Nanyang Technological University639798Singapore

Photovoltaic(PV)inverter-based volt/var control(VVC)is highly promising to tackle the emerging voltage regulation challenges brought by increasing PV ***,PV inverter operational reliability has arisen as a critical concern for practical VVC *** paper proposes a new PV inverter based VVC optimization model and a Pareto front analysis method for maintaining a satisfactory inverter ***,reliability of the vulnerable DC-link capacitor inside a PV inverter is analyzed,and long-term VVC impact on inverter operational reliability is ***,a multi-objective PV inverter based VVC optimization model is proposed for minimizing both inverter apparent power output and network power loss with a weighting ***,a Pareto front analysis method is developed to visualize the impact of the weighting factor on VVC performance and inverter reliability,thus determining the effective weighting factor to reduce network power loss with expected inverter *** of the proposed VVC optimization model and Pareto front analysis method are verified in a case study.

关键词： Distribution network inverter reliability analysis pareto front analysis photovoltaic stochastic optimization volt/var control

Emergency Control Strategy for Power Systems with Renewables Considering a Utility-scale Energy Storage Transient

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CSEE Journal of Power and Energy Systems 2021年第5期7卷 986-995页

作者： Xuekuan Xie Yuchen Zhang Ke Meng zhao yang dong Junwei Liu School of Electrical Engineering and Telecommunications University of New South WalesSydneyNSW 2052

Integration of renewable energy generators has greatly altered both static and dynamic characteristics of the *** with the uncertainties it introduced,the risk of a system being transient instable is significantly *** paper proposes a multi-objective coordinated post-contingency control *** aims to increase post-contingency system security with emergence control(EC)while minimizing the total control *** ECs are adopted in this paper:energy storage systems(ESSs)and emergency load shedding(ELS).ESSs are immediately connected to the network after contingency occurrence to provide both active and reactive power *** will be triggered when the support from ESSs is insufficient to stabilize the system to prevent further deterioration of system *** of the proposed method was evaluated on a modified New England 39-bus benchmark *** results indicate that the proposed method can find solutions to stabilize the system against credible contingencies and optimally balance between system stability and economy.

关键词： Emergency control energy storage renewable energy uncertainty system modelling transient stability

Risk-based Two-stage Optimal Scheduling of Energy Storage System with Second-life Battery Units

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CSEE Journal of Power and Energy Systems 2023年第2期9卷 529-538页

作者： Yongxi Zhang Jiahua Zhu Yan Xu Renjun Zhou zhao yang dong School of Electrical and Information Engineering Changsha University of Science and TechnologyChangsha 410114China School of Electrical&Electronic Engineering Nanyang Technological UniversitySingapore The University of Sydney Sydney 2052Australia

With the growing adoption of Electrical Vehicles(EVs),it is expected that a large number of on-board Li-ion batteries will be retired from EVs in the near *** batteries will typically retain 80%of their initial capacities and can be recycled as second life batteries(SLBs).Although the capital costs of SLBs are much cheaper,their operational reliability is an important concern since used batteries may suffer from a higher failure *** paper aggregates brand new batteries and SLBs together to improve power system’s operating performance with renewable energy *** the context of a day-ahead and intra-day dispatch framework,a two-stage coordinated optimal scheduling method is ***,the energy cost of brand-new batteries and SLBs is calculated based on detailed battery degradation model,and the reliability of batteries is modeled based on the Weibull ***,Conditional value at risk(CVaR)criterion is applied to evaluate the risk induced by intermittent renewable power output,load demand variation and SLBs failure *** tests demonstrate the effectiveness of the proposed method.

关键词： Conditional value at risk reliability second life batteries

Effects of carrier density and interactions on pairing symmetry in a t_(2g) model

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Chinese Physics B 2024年第1期33卷 223-230页

作者：李云霄西文翰董召阳姚子健于顺利李建新 National Laboratory of Solid State Microstructures and Department of Physics Nanjing UniversityNanjing 210093China Nanjing University of Science and Technology Nanjing 210094China Department of Physics Nanjing Normal UniversityNanjing 210023China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China

By utilizing the fluctuation exchange approximation method,we perform a study on the superconducting pairing symmetry in a t_(2g) three-orbital model on the square *** the tight-binding parameters of the model are based on Sr_(2)RuO_(4),we have systematically studied the evolution of superconducting pairing symmetry with the carrier density and interactions,making our findings relevant to a broader range of material *** a moderate Hund’s coupling,we find that spin fluctuations dominate the superconducting pairing,leading to a prevalent spin-singlet pairing with a d_(x^(2)-y^(2))-wave symmetry for the carrier density within the range of n=1.5-4 per *** reducing the Hund’s coupling,the charge fluctuations are enhanced and play a crucial role in determining the pairing symmetry,leading to a transition of the pairing symmetry from the spin-singlet d_(x^(2)-y^(2))-wave to the spin-triplet ***,we find that the superconducting pairings are orbital *** the carrier density changes from n=4 to n=1.5,the active orbitals for superconducting pairing shift from the quasi-two-dimensional orbital dxy to the quasi-one-dimensional orbitals d_(xz) and d_(yz).

关键词： unconventional superconductivity pairing mechanism Fermi surface three-orbital model

Direct load control by distributed imperialist competitive algorithm

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Journal of Modern Power Systems and Clean Energy 2014年第4期2卷 385-395页

作者： Fengji LUO Junhua zhao Haiming WANG Xiaojiao TONG Yingying CHEN zhao yang dong Centre for Intelligent Electricity Networks(CIEN) The University of NewcastleCallaghanNSW 2308Australia The Hunan First Normal University ChangshaChina The University of Sydney SydneyNSW 2006Australia

Demand side management techniques have drawn significant attentions along with the development of smart *** paper proposes a new direct load control(DLC)model for scheduling interruptible air conditioner *** model is coordinated with the unit commitment and economic dispatch to minimize the total operation cost over the whole dispatch *** network constraints are also considered in the *** ensure the thermal comfort of the occupants,we are among the first to incorporate the advanced two-parameter thermal inertia dynamical model of customer houses into the DLC model to calculate the indoor temperature *** paper also proposes a distributed imperialist competitive algorithm to effectively solve the *** simulation studies prove the efficiency of the proposed methodology.

关键词： Direct load control Imperialist competitive algorithm Demand side management