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Dual Interval Optimization Based Trading Strategy for ESCO in Day-ahead Market with Bilateral Contracts

Journal of Modern power Systems and Clean Energy 2020年第3期8卷 582-590页

作者： Shengmin Tan Xu Wang Chuanwen Jiang Key Laboratory of Control of Power Transmission and Conversion Ministry of EducationShanghai Jiao Tong UniversityShanghai 200240China

Being capable of aggregating multiple energy resources, the energy service company(ESCO) has been regarded as a promising alternative for improving power system flexibility and facilitating the consumption of renewable resources in the electricity market. Considering the uncertain variables in day-ahead(DA) market trading, an ESCO can hardly determine their accurate probability distribution functions. Traditional interval optimization methods are used to process these uncertain variables without specific probability distribution ***, the lower and upper bounds of the intervals may change due to extreme weather conditions and other emergent events. Hence, a dual interval optimization based trading strategy(DIOTS) for ESCO in a DA market with bilateral contracts(BCs) is proposed. First, we transfer the dual interval optimization model into a simple model consisting of several interval optimization models. Then, a pessimistic preference ordering method is applied to solve the derived model. Case studies illustrating an actual test system corroborate the validity and the robustness of the proposed model, and also reveal that ECSO is critical in improving power system flexibility and facilitating the ability of absorbing renewable resources.

关键词： Dual interval optimization energy service company(ESCO) day-ahead market bilateral contract market

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Multi-time Collaborative Restoration for Integrated Electrical-gas Distribution Systems Based on Rolling Optimization

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CSEE Journal of power and Energy Systems 2024年第2期10卷 660-671页

作者： Jingyang Yun Zheng Yan Yun Zhou Peichao Zhang Weidong Hu Key Laboratory of Control of Power Transmission and Conversion of Ministry of Education Department of Electrical EngineeringShanghai Jiao Tong University

This paper proposes a multi-time collaborative restoration model for integrated electricity-gas distribution sys-tems(IEGDSs)considering multiple resources after extreme weather *** on the linearized power flow constraints of the unbalanced electrical distribution system(EDS)and gas distribution system(GDS),this problem can be formulated as a mixed-integer linear programming(MILP)*** improve the efficiency and veracity of the solution,a rolling optimiza-tion based two-stage method is developed with the first stage solved by a linear approximation model,and the second stage solved by real-time updated rolling *** solving the MILP problem using rolling optimization,the proposed model and solution method achieve efficient and reliable collaborative restoration of IEGDS considering multiple resources and unbal-anced operation characteristics of *** effectiveness of the proposed model and method is validated by using an IEGDS made of a 37-bus unbalanced EDS and 11-node *** Terms-Electricity-gas system,mix-integer linear programming,power system restoration.

关键词： Electricity-gas system mix-integer linear programming power system restoration

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Sharing energy in wider area: A two-layer energy sharing scheme for massive prosumers

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Applied Energy 2025年 392卷

作者： Su, Yifan Yang, Peng Kang, Kai Wang, Zhaojian Qi, Ning Liu, Tonghua Liu, Feng State Key Laboratory of Power Transmission Equipment Technology School of Electrical Engineering Chongqing University Chongqing400044 China School of Electronics and Information Xi'an Polytechnic University Xi'an710048 China State Key Laboratory of Power System Operation and Control Department of Electrical Engineering Tsinghua University Beijing100084 China Key Laboratory of System Control and Information Processing Ministry of Education of China Department of Automation Shanghai Jiao Tong University Shanghai200240 China Department of Earth and Environmental Engineering Columbia University New YorkNY10027 United States

The popularization of distributed energy resources transforms end-users from consumers into prosumers. Inspired by the sharing economy principle, energy sharing markets for prosumers are proposed to facilitate the utilization of renewable energy. This paper proposes a novel two-layer energy sharing market for massive prosumers, which can promote social efficiency by wider-area sharing. In this market, there is an upper-layer energy sharing market (U-ESM) in the distribution system and numerous lower-layer energy sharing markets (L-ESMs) in local communities. Prosumers in the same community share energy with each other in the L-ESM, which can be uncleared. The energy surplus and shortage of L-ESMs are cleared in the U-ESM. Thanks to the wider-area two-layer structure, the market outcome is near-social-optimal in large-scale systems. However, the proposed market forms a complex mathematical program with equilibrium constraints (MPEC). To solve the problem, we propose an efficient and hierarchically distributed bidding algorithm. The proposed two-layer market and bidding algorithm are verified on the IEEE 123-bus system with 11,250 prosumers, which demonstrates the practicality and efficiency for large-scale markets. © 2025 Elsevier Ltd

关键词： Game theory

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Microstructure and tribological properties of supersonic plasma sprayed Ni-based high entropy alloy coatings optimized by response surface method

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Intermetallics 2025年 183卷

作者： Zhao, Yonglin Chen, Ziming Shi, Weili Yang, Jun Li, Han Han, Bingyuan Hou, Shuai Hubei Provincial Key Laboratory of Automotive Power Transmission and Electronic Control Shiyan442002 China School of Automotive and Traffic Engineering Jiangsu University of Technology Chang Zhou213001 China Tianjin Long March Launch Vehicle Manufacturing Co. Ltd. Tianjin300301 China State Key Laboratory of NBC Protection for Civilian Beijing102205 China

FeCoNiCrAl high entropy alloy (HEA) coatings were prepared through the employment of the plasma spraying technique. The plasma spraying process parameters were optimized by means of the response surface methodology (RSM). A Box Behnken Design (BBD) was adopted to evaluate the effects of spraying power, spraying distance, and main gas flow rate on the porosity and microhardness of the coatings. Microscopic analysis and mechanical performance testing were conducted on the coating. Research showed that FeCoNiCrAl high entropy alloy coatings with different powers all consisted of body-centered cubic (BCC). The results revealed that the spraying power was the key factor affecting the porosity and microhardness of the coatings. With the change of spraying power, the melting degree of FeCoNiCrAl powder differed, and various spreading droplets appeared on the coating surface. The porosity and microhardness of the optimized FeCoNiCrAl coating were 0.45 % and 476.98 HV0.1, respectively, which were in close agreement with the model predictions. The results obtained from TEM indicated that the grains of the coating were highly crystallized and dislocations were existent within them. The optimized coating manifested a notable augmentation in wear resistance. Fatigue wear and abrasive wear were determined to be the predominant wear mechanisms discerned in the coating. Through the optimization of spraying parameters, the FeCoNiCrAl coating had been refined, thereby having furnished a reference for future investigations into plasma - sprayed FeCoNiCrAl high entropy alloy coatings. © 2025 Elsevier Ltd

关键词： Microhardness

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Geometric Optimization of Patterned Conductive Polymer Composite-based Strain Sensors Toward Enhanced Sensing Performance

arXiv

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arXiv 2025年

作者： Shang, Jia-Chen School of Transportation Science and Engineering Beihang University 37 Xueyuan Road Haidian District Beijing100191 China Beijing Key Laboratory for High-efficient Power Transmission and System Control of New Energy Resource Vehicle Beijing100191 China

The patterned design of flexible sensors enables customized performance to meet diverse application demands. However, when multiple geometric parameters and sensing metrics are involved, experimental approaches to establish structure-performance relationships become costly and inefficient. Here, a novel universal piezoresistive model—overcoming limitations of commonly used models that are only applicable to small strains and linear responses—is developed to capture the relationship between conductivity tensor components and strain. A numerical method incorporating this model simulates the electromechanical properties of conductive composites and predicts patterned strain sensors behavior. To validate this approach, a flexible strain sensor based on laser-induced graphene technology is fabricated and tested. Additionally, a rapid, cost-effective workflow combining Latin hypercube sampling and Pareto-optimal solutions is demonstrated for multi-parameter and multiobjective optimization of the sinusoidal-patterned sensor. This study provides valuable insights for investigating the structure-performance relationship of strain sensors and advances optimization methods for sensor designs. Copyright © 2025, The Authors. All rights reserved.

关键词： Structural optimization

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Unified Two-Time-Scale Modeling and Hybrid ZVS Modulation of LCC-LCC Compensated IPT System With Wide Input Voltage Range

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IEEE Transactions on power Electronics 2025年

作者： He, Kai Gao, Fei Liu, Xin Jiang, Ying Yang, Xijun Rogers, Daniel J. the Key Laboratory of Control of Power Transmission and Conversion Ministry of Education Shanghai Jiao Tong University Shanghai200240 China the Department of Electrical Engineering Shanghai Jiao Tong University Shanghai200240 China the Shenzhen Institute for Advanced Study University of Electronic Science and Technology of China Shenzhen518110 China the Shanghai Dianji University Shanghai201306 China the University of Oxford OxfordOX1 2JD United Kingdom

—The operating frequencies of the dc-dc converter connected to the distributed energy resources and inductive power transfer (IPT) system are often different, which makes it difficult to model the cascaded system accurately by using a single time scale. In this article, a two-time-scale model (TTSM) consisting of fast-time-scale and slow-time-scale state variables, which has high accuracy and efficient calculation, is proposed for the cascaded four-switch buck-boost IPT (FSBB-IPT) system. The full-mode operation and zero-voltage-switching (ZVS) conditions of the cascaded system are studied based on the TTSM. To overcome the failure of the traditional ZVS modulation strategies of the first-stage converter in the FSBB-IPT system, a hybrid ZVS modulation scheme in the new time scale is developed to reduce the root mean square (RMS) value of the inductor current and improve the efficiency. A FSBB-IPT prototype with wide input voltage range is built to verify the effectiveness of the proposed modulation scheme. © 2025 Institute of Electrical and Electronics Engineers Inc.. All rights reserved.

关键词： Buck-Boost converter

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Suspension of Australian National Electricity Market in 2022 Necessitates Mechanism Evolution Ensuring power Supply Security

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Journal of Modern power Systems and Clean Energy 2023年第2期11卷 674-679页

作者： Zhenfei Tan Hua Geng Xiaoyuan Xu Sijie Chen Zheng Yan Key Laboratory of Control of Power Transmission and Conversion Ministry of Educationand Shanghai Non-Carbon Energy Conversion and Utilization InstituteShanghai Jiao Tong UniversityShanghai 200240China

The National Electricity Market(NEM)in Australia was suspended during June 15-23,2022,with a primary attribution to the lack of available generation *** incident is noteworthy because it was the first market suspension in NEM’s history and took place in a major energy exporting *** this letter,we review the outline and impacts of the *** the perspectives of market regulation,electricity supply,and electricity demand,we identify three underlying causes of the market suspension and offer four recommendations for the market mechanism evolution to ensure power supply security.

关键词： Electricity market administered pricing power system security energy crisis demand response

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Leg compliance control of a hexapod robot based on improved adaptive control in different environments

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Journal of Central South University 2015年第3期22卷 904-913页

作者：朱雅光金波李伟 State Key Laboratory of Fluid Power Transmission and Control (Zhejiang University)

Considering the compliance control problem of a hexapod robot under different environments, a control strategy based on the improved adaptive control algorithm is proposed. The model of robot structure and impedance control is established. Then, the indirect adaptive control algorithm is derived. Through the analysis of its parameters, it can be noticed that the algorithm does not meet the requirements of the robot compliance control in a complex environment. Therefore, the fuzzy control algorithm is used to adjust the adaptive control parameters. The satisfied system response can be obtained based on the adjustment in real time according to the error between input and output. Comparative experiments and analysis of traditional adaptive control and the improved adaptive control algorithm are presented. It can be verified that not only desired contact force can be reached quickly in different environments, but also smaller contact impact and sliding avoidance are guaranteed, which means that the control strategy has great significance to enhance the adaptability of the hexapod robot.

关键词： hexapod robot tip-point force adaptive control fuzzy control adaptability

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Metamorphic Manipulating Mechanism Design for MCCB Using Index Reduced Iteration

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Chinese Journal of Mechanical Engineering 2013年第2期26卷 232-241页

作者： XU Jinghua ZHANG Shuyou ZHAO Zhen LIN Xiaoxia State Key Laboratory of Fluid Power Transmission and Control Zhejiang University

The present research on moulded case circuit breaker（MCCB） focuses on the enhancement of current-limiting interrupting performance during short circuit, overload, under voltage and phase failure, involving electrics, magnetic, mechanics, thermal, material, friction, arc extinguishing, impact vibration, skin effect, etc. The rigid-flexible coupling of the parts and components of the metamorphic manipulating mechanism in multi-fields leads to the non-rigid, high frequency, high damping, singularity of the Euler-Lagrange equations which represents the multi-body dynamics. The small step iteration which is used for obtaining the instantaneous and short time critical interrupting performance of metamorphic mechanism appears inaccuracy. It is difficult to realize top-down design by existing CAD systems. Therefore, a metamorphic manipulating mechanism design method for MCCB using index reduced iteration（IRI） is put forward. The metamorphic manipulating mechanism of MCCB is decomposed into three mechanisms： main switch connector mechanism, electromagnet-drawbar-jump buckle mechanism, and bimetallic strip-drawbar mechanism, which is respectively described by electro-dynamic force, electromagnet force, and bimetallic strip force. The dummy part（virtual rigid） without moment of inertia and mass is employed as intermediate to join the flexible body and rigid body. The model of rigid-flexible coupling metamorphic mechanism multi-body dynamics is built. The differential algebraic equations（DAEs） of the multibody dynamics model are converted to pure ordinary differential equations（ODEs） by coordinate partition. Order reduced integration with multi-step and variable step-size is preceded based on IRI. The non-linear algebraic equations are solved in each integration step by Newton-Rapson iteration. There is no ill-condition and singularity of Jacobian matrix when step size reduces to zero. The independent prototype design system using ACIS R13, HOOPS V11.0 and Visual C＋＋.NET 2003 h

关键词： index reduced iteration (IRI) moulded case circuit breaker (MCCB) metamorphic manipulating mechanism Euler-Lagrange equations rigid-flexible coupling multi-body dynamics current interrupting simulation

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Design and analysis of an underwater inductive coupling power transfer system for autonomous underwater vehicle docking applications

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Journal of Zhejiang University-Science C(Computers and Electronics) 2014年第1期15卷 51-62页

作者： Jian-guang SHI De-jun LI Can-jun YANG State Key Laboratory of Fluid Power Transmission and Control

We develop a new kind of underwater inductive coupling power transfer(ICPT)system to evaluate wireless power transfer in autonomous underwater vehicle(AUV)docking *** that determine the performance of the system are systematically analyzed through mathematical methods.A circuit simulation model and a finite element analysis(FEA)simulation model are developed to study the power losses of the system,including copper loss in coils,semiconductor loss in circuits,and eddy current loss in transmission *** characteristics of the power losses can provide guidelines to improve the efficiency of ICPT *** results and simulation results are validated by relevant experiments of the prototype *** output power of the prototype system is up to 45 W and the efficiency is up to *** preliminary results indicate that the efficiency will increase as the transmission power is raised by increasing the input *** the output power reaches 500 W,the efficiency is expected to exceed *** efficiency can be further improved by choosing proper semiconductors and *** analysis methods prove effective in predicting the performance of similar ICPT systems and should be useful in designing new systems.

关键词： Inductive coupling power transfer(ICPT) Autonomous underwater vehicle(AUV) docking Coupling coefficient Resonant capacitance power transfer efficiency power loss Eddy current

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