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IEEE International Conference on Smart Instrumentation, measurement and Applications (ICSIMA)

作者： Zhihang Xue Qi Huang Changhua Zhang Yongxing Cao Ran Zhang Sichuan Provincial Key Lab of Power System Wide-area Measurement and Control University of Electronic Science and Technology of China (UESTC) Chengdu China Sichuan Electric Power Research Institute Chengdu China

Online monitoring of power devices' state is a very important part of the Smart Grid (SM) building plan. Icing on the overhead transmission lines cause great accidents and vast economic loss. In China, icing monitoring technology and relative research is a hot point. The current operating icing monitoring systems based on electrical measurement do not work efficiently because it cannot solve the problem of electromagnetic interference with power supply. The fiber optic sensors, with light as the measurement media, solve those problems perfectly. In this paper, an icing monitoring system based on Fiber Bragg Grating (FBG) sensors is proposed. The system architecture design, the sensors fixing methods, and the development of the monitoring software, are introduced in detail.

关键词： Monitoring Conductors power transmission lines Optical fiber sensors Fiber gratings Strain

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Noncontact Current Source Reconstruction Based on Independent Component Analysis-A Simulation Study

Noncontact Current Source Reconstruction Based on Independen...

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2019 IEEE PES Innovative Smart Grid Technologies Asia, ISGT 2019

作者： Nyaaba, Ayambire Patrick Huang, Qi Li, Jian Pan, Siming Gao, Bin Tian, Guiyun Zhang, Shijun Xiao, Bin 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 Chengdu611731 China School of Automation Engineering University of Electronic Science and Technology of China Chengdu611731 China No. 9 Research Institute China Electronic Technology Group China

ISBN: (纸本)9781728135205

This paper implemented a current reconstruction system based on independent component analysis and magnetic field sensors. In this paper both the normal approximation and interfered approximation of magnetic flux density generated by current carrying conductors and sensed by four magnetic sensors are presented and discussed. The output voltage of the sensor array with and without interference was calculated based on the comprehensive independent component analysis algorithm. The relative reconstruction error based on the algorithm for array output voltage are within acceptable levels for protective devices proving the feasibility of the algorithm for source reconstruction. © 2019 IEEE.

关键词： Independent component analysis

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Robust Exponential Stability of a Class of Markovian Jump system with Polytopic Uncertainties and Mode-dependent delays

Robust Exponential Stability of a Class of Markovian Jump Sy...

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第三十三届中国控制会议

作者： Zhaohui Chen Qi Huang Sichuan Provincial key Lab of Power System Wide-area Measurement and Control University of Electronic Science and Technology of China Department of Mathematics and Physics Chongqing University of Science and Technology

ISBN: (纸本)9781479947249

The robust stability is investigated for a class of Markovian jump system with polytopic uncertainties and mode-dependent time-varying *** the Markovian jump system,the mode of delay is different from the mode of *** appropriate parameter-dependent and mixed-mode-dependent Lyapunov-Krasovskii functional is constructed to reduce the *** on the Lyapunov-Krasovskii theory,integral inequality and reciprocally convex approach,a sufficient condition in terms of linear matrix inequalities(LMIs) is derived,which ensures the system *** developed criterion is delay-dependent,mode-dependent as well as ***,numerical examples are provided to illustrate the less conservatism of our results.

关键词： Polytopic uncertainty,Reciprocally convex approach,Linear matrix inequality(LMI),Markovian jump system

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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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Subsynchronous Oscillation Analysis Using Multisynchrosqueezing Transform and Dissipating Energy Flow Method

Subsynchronous Oscillation Analysis Using Multisynchrosqueez...

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作者： Ma, Yue Huang, Qi Gooi, Hoay Beng Zhang, Zhenyuan Yang, Xiaomei Wang, Yang University of Electronic Science and Technology of China Provincial Key Lab of Power System Wide-Area Measurement and Control School of Mechanical and Electrical Engineering Chengdu611731 China Chengdu University of Technology College of Energy Chengdu610054 China School of Electrical and Electronic Engineering Singapore639798 Singapore Sichuan University College of Electrical Engineering Chengdu610065 China

With a high proportion of new energy and power electronic equipment connected to the modern power system, a new type of subsynchronous oscillation (SSO) is triggered, which affects the safe and stable operation of the system. Accurate analysis and identification of the SSO source becomes the key to studying this problem. This article presents a novel method to analyze SSOs. First, multisynchrosqueezing transform is applied to the signal to get the concentrated time-frequency analysis results. Then, the ridge tracking method is utilized to identify and reconstruct the subsynchronous component signals. The method of dissipating energy flow is applied to locate the source and sink of the SSO in the subsynchronous component signals. The performances of the proposed method are verified using electromagnetic transient simulations in a three-wind farms system and a modified IEEE 10-generator 39-bus New England power system. © 1972-2012 IEEE.

关键词： Phasor measurement units

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An ${H_\infty }$ Load Frequency control Scheme for Multi-area power system Under Cyber-Attacks and Time-Varying Delays

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IEEE Transactions on power systems 2022年第2期38卷 1336-1349页

作者： Guangdou Zhang Jian Li Olusola Bamisile Yankai Xing Dongsheng Cai Qi Huang Power System Wide-Area Measurement and Control Sichuan Province Key Laboratory School of Mechanical and Electrical Engineering University of Electronic Science and Technology of China Chengdu Sichuan China College of Nuclear Technology and Automation Engineering Chengdu University of Technology Sichuan China

In the power system, the application of the signals transmitted from the sensors to the controller can significantly improve the dynamic performance. However, cyber-attacks and time delays exist widely in the communication network, which has a considerable effect on stability, operation, and control. In this paper, an ${{\boldsymbol{H}}_\infty }$ load frequency control (LFC) scheme for multi-area power systems under cyber-attacks and time-varying delays is investigated. First, false data injection attacks (FDIA), as well as denial of service (DoS) attacks, are viewed as two typical cyber-attacks and introduced into the multi-area power system. Then, the state-space equations of the LFC power system under these two attacks and time-varying delays are analyzed and modeled. Furthermore, by using Lyapunov stability theory and linear matrix inequality (LMI) method, an ${{\boldsymbol{H}}_\infty }$ LFC scheme for attacked and delayed power systems is developed. The purpose of the proposed controller is to guarantee the closed-loop system exponentially mean-square stable with prescribed ${{\boldsymbol{H}}_\infty }$ performance. Finally, a three-area LFC system is employed to demonstrate the effectiveness of the proposed mechanism. The simulation results verified that the control performance of an attacked and delayed system can be improved significantly via the designed controller.

关键词： power system stability Delays Frequency control Delay effects Stability analysis Mathematical models Time-varying systems

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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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The Design and Implementation of Visualized Function Correlation for Secondary system in Smart Substation

The Design and Implementation of Visualized Function Correla...

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International Conference on Smart Grid and Clean Energy Technologies

作者： Manman Ren Qing Huang Qi Huang Shi Jing Sichuan Provincial Key Lab of Power System Wide-area Measurement and Control

ISBN: (纸本)9781467387729

In smart substation, the interrelationship among different devices is complex. The information in a smart substation is not transmitted through point to point communication, but through a novel communication network. Existing auxiliary systems for maintenance and inspection in intelligent substation cannot visualize the flow of packets in the implementation of specific function in secondary system. This paper, by analyzing the contents and requirements for maintenance and inspection in intelligent substation, designs a visualized function correlation. The function correlation library is built based on the principle of relay protection and expert experience. This library can show the interrelationship of the packets, when one specific function is triggered during the normal operation of substation, Sugiyama algorithm is used to illustrate the complete process of this function implementation.

关键词： Smart substation Function correlation library SCD files Network packets Sugiyama algorithm

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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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Design of a Mean Filter Algorithm for Phase Difference measurement Based on Fourier Transform

Design of a Mean Filter Algorithm for Phase Difference Measu...

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International Conference on Smart Grid and Clean Energy Technologies

作者： Gen Su Qi Huang Huan Liu Xinbao Wu Sichuan Provincial Key Lab of Power System Wide-area Measurement and Control

ISBN: (纸本)9781467387729

Because of non-coherent sampling, Fourier transform when used for the measurement of phase difference is insufficient in terms of the accuracy and real-time. This paper starts with the analysis of the relationship among the phase difference error, the frequency skew and the true phase difference. Then a mean filter algorithm, which can eliminate the phase difference error as far as possible by taking advantage of the symmetry of the function, is proposed. Comparing with traditional Fourier transform based phase difference measurement algorithm, the proposed algorithm can filter out the error well, improving the accuracy of phase difference measurement.

关键词： Asynchronous sampling Phase difference measurement Fourier transform Mean filter Phase difference error

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