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Optimal Day-ahead Dynamic Pricing of Grid-connected Residential Renewable Energy Resources Under Different Metering Mechanisms

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Journal of Modern Power systems and Clean Energy 2023年第1期11卷 168-178页

作者： Kimia Parandeh Abed Bagheri Shahram Jadid Center of Excellence for Power System Automation and Operation School of Electrical EngineeringIran University of Science and Technology(IUST)TehranIran

Nowadays,grid-connected renewable energy resources have widespread applications in the electricity ***,providing household consumers with photovoltaic(PV)systems requires bilateral interfaces to exchange energy and *** addition,residential consumers’contribution requires guaranteed privacy and secured data *** dynamic pricing is one of the incentive-based demand response methods that has substantial effects on the integration of renewable energy resources with smart grids and social *** metering mechanisms of renewable energy resources such as feed-in tariffs,net metering,and net purchase and sale are important issues in power grid operation *** this paper,optimal condition decomposition method is used for dayahead dynamic pricing of grid-connected residential renewable energy resources under different metering mechanisms:feed-intariffs,net metering,and net purchase and sale in conjunction with carbon emission *** to the stochastic nature of consumers’load and PV system products,uncertainties are considered in a two-stage decision-making *** results demonstrate that the net metering with the satisfaction average of 68%for consumers and 32%for the investigated electric company leads to 28%total load *** the case of net purchase and sale mechanism,a satisfaction average of 15%for consumers and 85%for the electric company results in 11%total load *** feed-in-tariff mechanism,in spite of increased social welfare,load reduction does not take place.

关键词： Dynamic pricing renewable energy resources feed-in-tariffs net metering net purchase and sale stochastic decision-making

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Controllability of heterogeneous networked sampled-data systems

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Science China(Information Sciences) 2025年第3期68卷 302-318页

作者： Zixuan YANG Lin WANG Xiaofan WANG Guanrong CHEN Department of Automation Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing Ministry of Education of China School of Mechatronic Engineering and Automation Shanghai University School of Electrical and Electronic Engineering Shanghai Institute of Technology Department of Electrical Engineering City University of Hong Kong

This study investigates the controllability of a general heterogeneous networked sampled-data system(HNSS) consisting of nonidentical node systems, where the inner coupling between any pair of nodes can be described by a unique *** signals on control and transmission channels are sampled and held by zero-order holders, and the control sampling period of each node can be different. Necessary and sufficient controllability conditions are developed for the general HNSS, using the Smith normal form and matrix equations, respectively. The HNSS in specific topology or dynamic settings is discussed subsequently with easier-to-verify conditions derived. These heterogeneous factors have been determined to independently or jointly affect the controllability of networked sampled-data systems. Notably, heterogeneous sampling periods have the potential to enhance the overall controllability, but not for systems with some special dynamics. When the node dynamics are heterogeneous,the overall system can be controllable even if it is topologically uncontrollable. In addition, in several typical heterogeneous sampled-data multi-agent systems, pathological sampling of single-node systems will necessarily cause overall uncontrollability.

关键词： network controllability sampled-data system heterogeneous system inner coupling multi-agent system

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A Constant Switching Frequency Real-Time Digital Control for ZVS Four-Switch-Buck-Boost Converter

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IEEE Transactions on Power Electronics 2025年第7期40卷 9649-9659页

作者： Yang, Fei Guo, Wenyu Zheng, Donglian Ruan, Xinbo Yao, Kai Gu, Ling Nanjing University of Science and Technology School of Automation Nanjing210094 China Nanjing University of Aeronautics and Astronautics Center for More-Electrical-Aircraft Power System College of Automation Engineering Nanjing211106 China

In this article, a constant switching frequency real-time digital control scheme is proposed for the four-switch buck-boost converter. With this control scheme, all the power switches can realize zero-voltage-switching, and the ripple and root-mean-square value of the inductor current can be minimized in the whole voltage and load ranges. Since all the control variables in any operation mode are obtained in real-time with one closed-loop PI controller and simple calculations, the inductor current in each switching cycle is optimized, and smooth operation mode transition and high dynamic response in the step change of load or input voltage is achieved. The effectiveness of the proposed control scheme is verified with a 300 W prototype. © 1986-2012 IEEE.

关键词： Buck converter

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Differential Protection Method of Stator and Rotor Current with Different Frequencies for Variable Speed Pumped Storage Units

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IEEE Transactions on Power Delivery 2025年第3期40卷 1531-1539页

作者： Qiao, Jian Yu, Haoyuan Wang, Yikai Wang, Kai Yin, Xin Chen, Linxu State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources Baoding China Wuhan University of Technology School of Automation Wuhan China

Rotor winding short-circuit fault (RWSF) is a common fault type of variable speed pumped storage unit (VSPSU). However, the RWSF protection in engineering typically depends on the integrated over-current protection of the AC excitation system, which has poor sensitivity to reflect the RWSF and makes it difficult to fulfill the requirements of safe operation of VSPSU. Inspired by transformer differential protection, a different frequency differential protection method using both stator and rotor phase currents is proposed. In terms of working principle and structure, the stator and rotor windings of the VSPSU are similar to the primary and secondary windings of the transformer, and there are conditions for differential protection. Furthermore, the Clark transformation is used to analyze the characteristic changes of stator and rotor currents after the RWSF. On this basis, the criterion form of different frequency differential protection is constructed based on the trapezoidal area method. Finally, the effectiveness of the proposed method is verified by dynamic simulation experiments. © 1986-2012 IEEE.

关键词： Stators

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Fractional Order Iteration for Gradient Descent Method Based on Event-Triggered Mechanism

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Journal of systems Science & Complexity 2023年第5期36卷 1927-1948页

作者： LU Jiajie WANG Yong FAN Yuan Department of Automation University of Science and Technology of ChinaHefei 230026China Anhui Engineering Laboratory of Human-Robot Integration System and Intelligent Equipment School of Electrical Engineering and AutomationAnhui UniversityHefei 230601China

In this work,a novel gradient descent method based on event-triggered strategy has been proposed,which involves integer and fractional order ***,the convergence of integer order iterative optimization method and the stability of its associated system with integrator dynamics are *** on this result,a fractional order iteration approach has been developed by modelling the system with fractional order ***,to reduce the comsumption of computation,a feedback based event-triggered mechanism has been introduced to the gradient descent *** convergence of this new event-triggered optimization algorithm is guaranteed by using a Lyapunov method,and Zeno behavior is proved to be avoided ***,the effectiveness and advantages of the proposed algorithms are verified by numerical simulations.

关键词： Event-triggered mechanism fractional order iteration gradient descent Zeno behavior

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Interference Suppression and Jitter Elimination Ability-Based Adaption Tracking Guidance for Robotic Fishes

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IEEE/CAA Journal of Automatica Sinica 2025年第1期12卷 126-137页

作者： Dongfang Li Jie Huang Rob Law Xin Xu Limin Zhu Edmond Q.Wu IEEE the School of Electrical Engineering and Automation Fuzhou University the Key Laboratory of System Control and Information Processing Ministry of Education the School of Electrical Engineering and Automation Fuzhou University 5G+Industrial Internet Institute Fuzhou University the University of Macau the College of Mechatronics and Automation National University of Defense Technology the School of Mechanical Engineering Shanghai Jiao Tong University the Department of Computer Science and Engineering Shanghai Jiao Tong University

This work presents an adaptive tracking guidance method for robotic fishes. The scheme enables robots to suppress external interference and eliminate motion jitter. An adaptive integral surge line-of-sight guidance rule is designed to eliminate dynamics interference and sideslip issues. Limited-time yaw and surge speed observers are reported to fit disturbance variables in the model. The approximation values can compensate for the system's control input and improve the robots' tracking ***, this work develops a terminal sliding mode controller and third-order differential processor to determine the rotational torque and reduce the robots' run jitter. Then, Lyapunov's theory proves the uniform ultimate boundedness of the proposed method. Simulation and physical experiments confirm that the technology improves the tracking error convergence speed and stability of robotic fishes.

关键词： Adaptive integral surge line-of-sight approximation robotic fish speed observer

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Physical Mechanism Enabled Neural Network for Power system Dynamic Security Assessment

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CSEE Journal of Power and Energy systems 2024年第6期10卷 2296-2307页

作者： Guozheng Wang Jianbo Guo Shicong Ma Kui Luo Xi Zhang Qinglai Guo Shixiong Fan Tiezhu Wang Weilin Hou Department of Power System China Electric Power Research InstituteBeijing 100192China School of Automation Beijing Institute of TechnologyBeijing 100081China Department of Electrical Engineering Tsinghua UniversityBeijing 100084China

Data-driven artificial intelligence technologies have emerged as increasingly fascinating tools for assessing power system ***,their inherent mechanism of inexplicability and unreliability now limits their scalability in power *** address this problem,this paper proposes a neural network design method empowered by physical mechanisms for power system security *** incorporates geometric characteristics of dynamic security regions into the network training process and constructs connections between network structure and system's unstable mode,which can perform security assessment with a neural network efficiently while ensuring physical ***,a credibility evaluation mechanism is established to ensure credibility of neural network predictions and reduce ***,effectiveness of the proposed method is verified on test *** and considerations in building a neural network with interpretable structures and credible predictions can provide a reference for machine intelligence applied in other industrial systems.

关键词： Credibility index machine intelligence neural network structure physical properties power system security assessment

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Research on Digital Twin system Platform Framework and Key Technologies of Unmanned Ground Equipment

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Complex system Modeling and Simulation 2024年第2期4卷 109-123页

作者： Kunyu Wang Lin Zhang Cheng Xu Han Lu Zhen Chen Hongbo Cheng Rui Guo the School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China the State Key Laboratory of Intelligent Manufacturing System Technology Beijing 100854China the Beijing Institute of Electronic System Engineering Beijing 100854China

As an emerging technology,digital twin is expected to bring novel application modes to the whole life cycle process of unmanned ground equipment,including research and development,design,control optimization,operation and maintenance,*** highly dynamic,complex,and uncertain characteristics of unmanned ground equipment and the battlefield environment also pose new challenges for digital twin *** from the new challenges faced by the digital twin of unmanned ground equipment,this paper designs a service-oriented cloud-edge-end collaborative platform architecture of the digital twin system of unmanned ground equipment,and further analyzes several key technologies supporting the implementation of the platform architecture.

关键词： unmanned ground equipment digital twin native cloud platform Modeling and Simulation(M&S) artificial intelligence

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Evaluation of Hybrid Switch Applications in Motor Control Unit for Electric Vehicles

Evaluation of Hybrid Switch Applications in Motor Control Un...

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2024 CPSS and IEEE International Symposium on Energy Storage and Conversion, CPSS and ISESC 2024

作者： Chen, Xingye Liu, Yan Li, Yisu Yang, Zhiqing Li, Helong Ding, Lijian School of Electrical Engineering and Automation Hefei University of Technology Hefei China Leadrive System Department Shanghai China

ISBN: (纸本)9798350380514

The concept of hybrid switch (HyS) by paralleling low-switching-Ioss silicon carbide (SiC) MOSFETs and low-cost silicon (Si) IGBTs offers an improved performance and cost tradeoff in motor control unit (MCU) for electric vehicles (EVs). In this paper, the loss and thermal models are developed for the proposed HyS. Based on that, a multi-objective method is proposed to select the optimal ratio for the HyS. Reliability of Hybrid Switch for EV s under active short circuit (ASC) operating condition is verified by Simulation. Furthermore, both EV model is developed to evaluate the performance/cost of HyS with endurance mileage under China light-duty vehicle test cycle (CLTC) profile. Several challenges of developing HyS are also discussed. It is found that the combination of 1 SiC MOSFET and 3 IGBTs and DIODEs is the low-cost scheme with optimized junction temperatures, while the scheme with 2 SiC MOSFETs and 2 IGBT and DIODEs is the one with the highest efficiency. The HyS with the high-efficiency ratio has a 4.7% increase in endurance mileage compared with IGBT. © 2024 IEEE.

关键词： Insulated gate bipolar transistors (IGBT)

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SF_(6) decomposition behaviour under partial discharge of typical insulation defects in gas-solid insulated valve-side bushing of converter transformer

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High Voltage 2023年第4期8卷 690-697页

作者： Hongtu Cheng Fuping Zeng Bowen Tang Haotian Li Ju Tang Zujian Huang Xianzong Chao School of Electrical Engineering and Automation Wuhan UniversityWuhanChina Hubei Key Laboratory of Power Equipment&System Security for Integrated Energy Resources WuhanChina School of Electrical and Electronic Engineering Hubei University of TechnologyWuhanChina

In this paper we investigated SF_(6) decomposition behaviour of typical insulation defects in gas-solid insulated converter transformer valve-side bushing under partial discharge(PD).Additionally,we compared the results with that of gas insulated switchgear(GIS).The results indicated that SF_(6) decomposition behaviour varies with the insulation defects *** metal protrusion defects,the proportion ranking of CO_(2) and SO_(2) can be related to whether the needle tip is wrapped with epoxy resin-impregnated paper(ERIP).The proportion of carbon-containing products is much higher under contamination defect than under other ***,the proportion of carbon-containing components is higher under flashover condition than under PD condition and is accompanied by the appearance of H2S and CS_(2).However,the yield of SO_(2)F_(2) is always *** to negative DC voltages,positive DC voltages have a higher proportion of carboncontaining components,mainly in the form of more CO_(2) and less SOF_(2).Compared to the PD decomposition behaviour of typical insulation defects in GIS,when PD involves ERIP,the proportion of carbon-containing products,especially CO_(2),is significant higher,while the proportion of sulphur containing products,especially SO_(2)F_(2),is lower.

关键词： behaviour insulation solid

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