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6th IEEE Conference on Energy Internet and Energy system Integration, EI2 2022

作者： Guan, Zexiang Cai, Dongsheng Bamisile, Olusola Li, Jian Zhang, Zhenyuan Huang, Qi Chengdu University of Technology School of Nuclear Technology and Automation Engineering Chengdu China University of Electronic Science and Technology of China Sichuan Provincial Key Lab of Power System Wide-Area Measurement and Control Chengdu China

ISBN: (纸本)9798350347159

When a high proportion of renewable energy is connected to the grid, the net load fluctuation can be suppressed by configuring energy storage. However, the current cost of energy storage is high. This paper proposes a bi-level optimization model that takes into account the dynamic allocation of shared energy storage (SES) capacity in response to electric load demand. The upper-layer objective function adopts EO optimization algorithm, which is to maximize the income of the shared energy storage operator (SESO). The lower-layer multi-objective function is to minimize the sum of the operating cost and the net load mean square error of multiple microgrids, which can be classified as the mixed integer linear programming problem. Then, the solution flow of the algorithm is given. Finally, under the constraints of the hierarchical optimization-based model, solving the problem by the CPLEX solver on the MATlab platform. The results demonstrate that the proposed method can allocate optimal capacity and reduce operating costs for microgrids. Simultaneously, this method increases the revenue of SESO and promotes the consumption of renewable energy. © 2022 IEEE.

关键词： Mean square error

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Calculation and Simulation Analysis of Current Carrying Capacity and Thermal Effect of 500kV Tunnel Cable 6

Calculation and Simulation Analysis of Current Carrying Capa...

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6th IEEE Conference on Energy Internet and Energy system Integration, EI2 2022

作者： Liang, Ruipeng Huang, Qi Bamisile, Olusola Li, Jian Zhang, Zhenyuan Cai, Dongsheng Chengdu University of Technology School of Nuclear Technology and Automation Engineering Chengdu China University of Electronic Science and Technology of China Sichuan Provincial Key Lab of Power System Wide-Area Measurement and Control Chengdu China

ISBN: (纸本)9798350347159

The Qinghai-Tibet Plateau contains the most abundant clean energy such as hydropower, wind and solar in the world. However, it is very difficult to add overhead transmission lines on the ground due to the complex geographical environment. The large-capacity tunnel cables which is less affected by the earth surface environment, may play an important role on the energy transmission in such area. Based on the cable thermal circuit model, the electrical-magnetic-thermal multiphysics coupling of the cable is modeled in COMSOL Multiphysics. The parameter changes of the material during the temperature rising process, the influence of different ventilation conditions and different current-carrying capacities on the changes of the cable temperature field are quantitatively analyzed. The results show that the proposed model is valid in certain conditions. The research on the current carrying capacity and thermal effect of tunnel cables is of great significance for the transportation and consumption of large-scale clean energy resources. © 2022 IEEE.

关键词： Cables

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Passive Temperature Threshold Sensors Based on RFID and Shape Memory Polymer for power system Monitoring

Passive Temperature Threshold Sensors Based on RFID and Shap...

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International Conference on power and Energy Technology (ICPET)

作者： Xiaoyu Guo Libo Fan Rongjie Han Jiabin Huang Yuchao Shi Yibo Lai Min Sun Power System Wide Area Measurement and Control of the Key Laboratory of Sichuan Province University of Electronic Science and Technology Chengdu China The State Grid Zhejiang Electric Power Company Hangzhou China

ISBN: (数字)9798350375855

ISBN: (纸本)9798350375862

The sensing technology of the power system promotes the deep integration of energy network and data information and helps to build a new type of power system with deep integration of digital and system. It can ensure the stable operation of the power grid. RFID sensors are widely used as passive wireless sensors. While they still face the disadvantage of missing data information when the reader is not actively interrogated. In this paper, a shape memory polymer material is introduced and its thermo-mechanical property of deformation recovery above and below the glass transition temperature is exploited to design a temperature threshold sensor. By measuring the backscatter power of the RFID tag, whether the target exceeds the threshold temperature could be determined. This method can record historical information in a non-electric form when the reader is not actively interrogated, facilitating quick problem solving or troubleshooting. In this paper, a prototype of the SMP material was fabricated using 3D printing technology. And several reader-tag temperature threshold detection experiments at different distances were conducted. The results show that the SMP material recovers its deformation near 60 °C in the reader antenna field range. And the backscatter power amplitude of the two tags is significantly flipped. This validates the feasibility of temperature threshold sensors. When electrical equipment malfunctions lead to high temperatures, temperature threshold sensors can detect the malfunction and solve the hidden problem.

关键词： Temperature sensors Temperature measurement Temperature Shape Deformation Switched mode power supplies Sensor systems Sensors Polymers Backscatter

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A power Management Circuit with Supercapacitors for Magnetic Field Energy Harvesting system in power Transmission Lines

A Power Management Circuit with Supercapacitors for Magnetic...

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International Conference on power and Energy Technology (ICPET)

作者： Yuan Gao Libo Fan Rongjie Han Jiabin Huang Ming Liu Min Sun Power System Wide Area Measurement and Control of the Key Laboratory of Sichuan Province University of Electronic Science and Technology Chengdu China The State Grid Zhejiang Electric Power Company Hangzhou China

ISBN: (数字)9798350375855

ISBN: (纸本)9798350375862

For magnetic energy harvesting systems, power management circuits play a very important role in the system. This paper introduces an energy management circuit for the energy collection system, which can efficiently deposit the collected energy into the load. The energy management circuit is mainly composed of supercapacitor and MCU. The supercapacitor is used as a start-up excitation and energy storage element. A low power MCU is employed to control the synchronous rectifier circuit Three operating modes based on the primary transmission line current are proposed. The system can switch between the three operating modes autonomously. The system is verified through experiments and effectively achieves steady-state operation and efficient energy management.

关键词： power transmission lines power supplies power system management Circuits Supercapacitors Batteries Energy harvesting Magnetic fields Magnetic circuits Switching circuits

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An optimized dynamic state estimation method for voltage source converter under cyber-attacks

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ENERGY REPORTS 2023年 9卷 22-30页

作者： Yang, Kai Xing, Yankai Wang, Baolu Li, Jian Zhang, Guangdou Bamisile, Olusola Huang, Qi Univ Elect Sci & Technol China Power Syst Wide Area Measurement & Control Key Lab Chengdu 611731 Peoples R China Chengdu Univ Technol Coll Nucl Technol & Automat Engn Chengdu 610059 Peoples R China China tobacco Guangxi Ind Co LTD Nanning 530000 Peoples R China

The measured data of the power system with voltage source converter (VSC) depending on data communication network, are monitored and analyzed by Dynamic state estimation (DSE), which can provide predictive data to control system. However, information communication technology may contain unknown risks and be vulnerable to cyber-attacks, resulting in inaccurate predictions of DSE. For example, the communication network of wide area measurement system (WAMS) will provide wrong data to DSE after being attacked. Thus, in this paper, an optimized dynamic state estimation method for voltage source converter considering cyber-attack is proposed. First, in order to consider more dynamic characteristics of VSC and provide a more complete model for DSE, the dynamic model of VSC which is affected by cyber-attacks is derived. Then, base on the model which is linearized around an equilibrium point, the Kalman filter considering anomalous events caused by false data injection attack (FDIA) is improved to obtain the optimal state estimated value. Finally, to verify the effectiveness of the proposed method and the accuracy of prediction values, a simulation has been carried out on a single-VSC infinite-bus power system. The simulation results show that the proposed method can predict dynamic state values effectively and the Root Mean Squared Error (RMSE) is around 4.6 x 10-5 in the power system with VSC considering cyber-attack.(c) 2022 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://***/licenses/by/4.0/).

关键词： Voltage source converter (VSC) Kalman filter (KF) False data injection attack (FDIA) Dynamic state estimation (DSE)

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Hierarchical control Scheme for VSC-MTDC system with multiple Renewable Energy Sites Based on Optimal power Flow and Droop Scheme 6

Hierarchical Control Scheme for VSC-MTDC System with multipl...

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6th IEEE Conference on Energy Internet and Energy system Integration, EI2 2022

作者： Raza, Asif Huang, Qi Li, Jian Bamisile, Olusola Dongsheng, Cai Raza, Ghalib University of Electronic Science & Technology of China Sichuan Provincial Key Lab of Power System Wide -Area Measurement and Control School of Mechanical and Electrical Engineering China Chengdu University of Technology College of Nuclear and Automation Engineering Sichuan Provincial Key Lab of Power System Wide-Area Measurement and Control School of Mechanical and Electrical Engineering University of Electronic Science & Technology of China China University of Electronic Science & Technology of China China Chengdu University of Technology College of Nuclear and Automation Engineering Sichuan China Benazir Bhutto Shaheed University of Technology & Skill Development Khairpur Pakistan

ISBN: (纸本)9798350347159

This paper designs a hierarchical control system to improve control performance in a multi-terminal high voltage direct current based on the voltage source converter (VSC-MTDC) transmission system. In this control scheme, the primary control layer employs droop control, while the secondary control layer has developed optimal power flow control (OPF) for maintaining the variation of DC voltage and regulating the active power, and simultaneously minimizing power loss. In the event of a power disturbance or a change in power generation or consumption in the DC system, based on OPF results a new stable droop operating mode is established to stabilize DC voltage variation and regulate active power in the network. A ±400 kV four-terminal VSC-MTDC test network has been developed by using PSCAD and MATlab simulation tools to assess the proposed control scheme. The primary controller is designed in PSCAD, and the secondary optimum control technique is applied in MATlab. The results of steady-state and transient operating modes demonstrate that the planned control technique can achieve DC voltage regulation and keep active power, and minimize the power losses in the MTDC system. © 2022 IEEE.

关键词： MATlab

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A Dynamic control Strategy for Enhancing the Energy Extracting Capability of Magnetic Field Energy Harvesters in Sensor Nodes of power Equipment

A Dynamic Control Strategy for Enhancing the Energy Extracti...

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IEEE International Conference on power and Energy systems (ICPES)

作者： Yuan Gao Libo Fan Jiabin Huang Rongjie Han Min Sun Power system wide area measurement and control of the Key Laboratory of Sichuan Province University of Electronic Science and Technology of China Chengdu China The State Grid Zhejiang Electric Power Company Hangzhou China

ISBN: (数字)9798350391329

ISBN: (纸本)9798350391336

With the widespread application of sensors nodes in power equipment, providing a stable energy supply for these sensors has become a significant challenge. Traditional batterypowered solutions are costly and difficult to install. The development of energy harvesting technology offers a new technical approach to address this challenge. This paper mainly investigates how to enhance the energy harvesting power of Magnetic Field Energy Harvesters (MEH) under conditions where the magnetic field around power equipment is limited. A dynamic control method is proposed to improve the energy harvesting power of MEH. The fundamental idea of dynamic control is to precisely control the MOSFETs in the rectifier, dynamically adjusting the switching times of the energy harvesting interval to be symmetric around the peak current of the primary side, thereby significantly enhancing harvesting efficiency. This method is particularly applicable when the magnetic core enters the soft saturation region, causing the energy harvesting interval to be less than T/2. Experimental results show that under constant voltage load, dynamic control effectively adjusts the energy harvesting interval, maximizing the current extracted during this interval, thereby effectively increasing energy harvesting power. Compared to passive rectification, active rectification under dynamic control increases the energy harvesting power by 76%, and the power factor of active rectification is 1.7 times that of passive rectification. The research findings provide important theoretical support and practical significance for the application of magnetic field energy harvesting technology in sensor nodes.

关键词： MOSFET Magnetic sensors Magnetic cores Switches control systems Timing Energy harvesting Magnetic fields Voltage control Intelligent sensors

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Optimal Scheduling Model of Community Integrated Energy system Based on Cooperative Game Theory

Optimal Scheduling Model of Community Integrated Energy Syst...

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power and Energy (PandaFPE), Panda Forum on

作者： Jialin Du Sen Zhang Shihua Luo Yiping Yuan Weihao Hu Sichuan Provincial Key Lab of Power System Wide Area Measurement and Control School of Mechanical and Electrical Engineering University of Electronic Science and Technology of China Chengdu China

Currently, a large number of community integrated energy systems operate independently and lack coordination and cooperation with each other. On the whole, the complementary coupling potential between energy production and consumption has not been fully explored, which is not conducive to the efficient utilization of clean energy. To solve the above problem, this paper proposes an optimal scheduling model of community integrated energy system considering integrated demand response and carbon tax. Moreover, based on cooperative game theory, this paper adopts the Sharpley value to achieve fair and reasonable distribution of cooperation profits. The case study results indicate that the energy sharing model proposed in this article can achieve better economic benefits.

关键词：

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Demand Response Dealing with Adjustable Uncertainty Set of Renewable Energy in Unit Commitment

Demand Response Dealing with Adjustable Uncertainty Set of R...

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IEEE Asia power and Energy Engineering Conference (APEEC)

作者： Zhaohua Hu Meng Xiao Xiangxi Duan Ruiguang Ma Chao Cheng Li Hu Economic Research Institute State Grid Sichuan Chengdu China Sichuan Provincial Key Lab of Power System Wide-Area Measurement and Control University of Electronic Science and Technology of China Chengdu China

Robust optimization approach (ROA) is conservative in tackling the uncertainty of renewable energy (RE) in unit commitment (UC). To deal with this problem of ROA, adjustable uncertainty set (AUS) is proposed and it is a subset of the maximum uncertainty set of RE. However, there exists operational risk of load shedding and RE curtailment in the scenarios where the generation of RE exceeds the AUS. In this paper, demand response (DR) is scheduled to determine the AUS. It reduces the conservativeness of ROA and meanwhile guarantees there is no operational risk. The safe operation of UC is guaranteed in the AUS and DR is used to compensate the RE’s uncertainty when RE is out of the AUS. Through the introduction of the auxiliary constraints and variables, the original UC problem formulation is transformed to a mixed integer linear programming problem and solved by commercial solvers. The proposed method proves effective in IEEE 6-bus and 118-bus systems. Simulation results show that the proposed method reduces the operational cost of UC, and its effectiveness is improved with more participation of DR.

关键词： Electrical engineering Renewable energy sources Uncertainty Costs Simulation Load shedding Demand response

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A DLL-based Router Scheme for the Process-layer Network in Smart Substations 5

A DLL-based Router Scheme for the Process-layer Network in S...

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5th IEEE International Conference on Electronics Technology, ICET 2022

作者： Guo, Rui Zheng, Ai Huang, Qi Sun, Huabo Chen, Lei Beijing Microelectronics Technology Institute Fpga Department Beijing China Smart Network Innovation Center China United Network Communications Limited Beijing China University of Electronic Science and Technology of China Sichuan Provincial Key Lab of Power System Wide-area Measurement and Control Chengdu China

ISBN: (纸本)9781665485081

With the extensive utilization of Intelligence Electronic Devices (IED), the modern smart substation is regard of a typical Internet of Things (IoT) system. The process-layer network in smart substations, which carries the measurements and control signals, needs to operate reliably in the face of unforeseen failures and external malicious attacks. In this paper: i) a mathematical framework for the process-layer network, attacks, and signals is modeled;ii) fundamental network performance limitations from system-theoretic and graph-theoretic perspectives are characterized;and iii) A DLL-based Router Scheme (DRS) is designed to ensure the network performance for the effective operation of IoT. Finally, we validate our design through a series of cases, and the results show that the designed DRS is effective to smooth the network performance. © 2022 IEEE.

关键词： Internet of things

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