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检索条件"机构=Sichuan Key Lab of Power System Wide-area Measurement and Control"

共 89 条记录，以下是81-90 订阅

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Fault detection and isolation based on optimal fault-tolerant observers for linear system

Fault detection and isolation based on optimal fault-toleran...

引用

International Conference on Electrical and control Engineering, ICECE 2010

作者： Yi, Jianbo Huang, Qi Sichuan Provincial Key Laboratory of Power System Wide-Area Measurement and Control Department of Automation University of Electronic Science and Technology of China UESTC Chengdu Sichuan Province 611731 China

ISBN: (纸本)9780769540313

The problem of diagnosing the actuator faults and sensor faults of linear system with the methods of fault detection and isolation (FDI) technology and optimal fault-tolerant observers is addressed. The measurable outputs used to reconstruct states for the system carry the fault information, which may affect the performance of the system state estimation. In this paper, by comparing the measurable outputs, reliable outputs without fault is selected as the input of the reconstructed system. Then reduced order optimal fault-tolerant observers are used to track the system states. Based on the FDI technology, residual observers are designed to achieve the fault detection for the linear system. Case studies demonstrate the effectiveness of FDI technology and optimal fault-tolerant observers method used in fault detection and isolation. © 2010 IEEE.

关键词： Linear systems

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A New Assessment Method to Voltage Vulnerability within the Static Energy Frame

A New Assessment Method to Voltage Vulnerability within the ...

引用

IEEE-power-and-Energy-Society General Meeting

作者： Liu, Qunying Liu, Qifang Huang, Qi UESTC Sichuan Prov Key Lab Power Syst Wide Area Measurement & Control Chengdu 611731 Peoples R China Guodian Sichuan Ashine Power Co Ltd Chengdu 610041 Peoples R China

ISBN: (纸本)9781424483570

Voltage vulnerability has been important in power system security research. Considering the characteristic that the voltage are mainly influenced by the reactive power, the potential energy margin which can embody the impacts from the reactive load, the reactive output of generator, the reactive compensation, and so on, was proposed as the benchmark, and then, the degree index and the trend index of voltage vulnerability were derived, the impacts of grid topology and the reactive power inject ingredients on the voltage vulnerability were discussed. On this base, the assessment index of branch vulnerability was proposed to compute the distance of the current value of branch transmission to the initial value and ascertain the vulnerable area. In IEEE-30bus system, the feasibility and exactness of this method are identified by the simulation.

关键词： vulnerability of grid energy function voltage vulnerability the reactive power injection ingredients branch transmission ability

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New type of fiber optic sensor network for smart grid interface of transmission system

New type of fiber optic sensor network for smart grid interf...

引用

IEEE General Meeting power& Energy Society

作者： Qi Huang Changhua Zhang Qunying Liu Yan Ning Yongxing Cao Sichuan Provincial Key Lab of Power System Wide-area Measurement and Control University of Electronic Science and Technology Chengdu Sichuan China Sichuan Provincial Key Lab of Power System Wide-area Measurement and Control SICHUAN Electric Power Test and Research Institute Chengdu Sichuan China

Smart Grid is aimed to incorporate monitoring, analysis, control and communication capabilities to improve reliability and energy efficiency. However, currently there is no enough sensor to provide information interface for the implementation of smart grid. Therefore, new types of sensors should be deployed to assist the implementation of smart grid. This paper proposes a novel scheme, in which new type of fiber optic sensors (as compared with traditional Farady effect based fiber optic sensor used in power system instrumentation) are used to provide multiple types of information for smart grid. The new Fiber Bragg Gratting (FBG) is advantageous in that it can collect variant types of information and can form a sensor network. A transmission line monitoring system with distributed fiber optic senor network is designed, and the procedures to evaluate the status of the overhead transmission line (such as sag, vibration, and galloping) are proposed. A testing setup is built at laboratory, and it is shown that the FBG sensor is capable of obtaining the comprehensive information for evaluating the status of the overhead transmission line.

关键词： power transmission lines Optical fiber sensors Transmission line measurements Optical fibers Fiber gratings Temperature measurement

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A new assessment method to voltage vulnerability within the static energy frame

A new assessment method to voltage vulnerability within the ...

引用

IEEE General Meeting power& Energy Society

作者： Qunying Liu Qifang Liu Qi Huang Sichuan Provincial Key Lab of Power System Wide-area Measurement and Control UESTC Chengdu China GUODIAN Sichuan Ashine Power Company Limited Chengdu China

ISBN: (纸本)9781424465491

关键词： Indexes Reactive power Potential energy Equations Generators Mathematical model Production

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Fault Detection and Isolation Based on Optimal Fault-Tolerant Observers for Linear system

Fault Detection and Isolation Based on Optimal Fault-Toleran...

引用

International Conference on Electrical and control Engineering (ICECE)

作者： Jianbo Yi Qi Huang Sichuan Provincial Key Laboratory of Power System Wide-Area Measurement and Control Department of automation University of Electronic Science and Technology Chengdu Sichuan China

关键词： Observers Fault tolerance Fault tolerant systems Actuators Fault detection Linear systems Mathematical model

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The Feasibility Study of Monitoring system of Icing on Transmission Line Based on Fiber Optic Sensor

The Feasibility Study of Monitoring System of Icing on Trans...

引用

International Conference on Electrical and control Engineering (ICECE)

作者： Yan Ning Qi Huang Changhua Zhang Yongxing Cao Hui Li Zhihang Xue School of Automation Engineering University of Electronic Science and Technology China Key Lab. of Power Syst. Wide-Area Meas. & Control for SiChuan Province China

Icing on overhead power transmission line is a serious problem that affects the secure operation of power system. This paper firstly analyses transmission line icing damage and the advantage & disadvantage of various current online monitoring techniques. Then, the implementation scheme of a novel method, which based on the sensor network of fiber optic sensor, is introduced. Through measuring the stress of the transmission line, the ice cover can be obtained. In order to prove the correct of this method, a emulation experiment, which compares the calculation result of the ANSYS software with the method brought out in this paper, is presented in detail. The ice cover calculation is proposed and achieved by monitoring the stress of transmission line, and verified by ANSYS FEM software.

关键词： power transmission lines Finite element methods Monitoring Ice Transmission line measurements Optical fiber sensors

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Evaluation of the effect of modal interaction higher than 2nd order in small-signal analysis

Evaluation of the effect of modal interaction higher than 2n...

引用

IEEE General Meeting power& Energy Society

作者： Qi Huang Zhouqiang Wang Changhua Zhang Key Laboratory of Power System Wide-area Measurement and Control University of Electronic Science and Technology Chengdu Sichuan China

This paper attempts to obtain insight about the effect of modal interaction of higher than 2 nd order in small-signal analysis, through evaluating the effect of 3 rd order modal interaction. The indices that quantify the 3 rd order modal interaction are defined, following the modal analysis procedures used in linear modal analysis and second order modal analysis. Numerical simulation results demonstrates that, there are definitely modal interaction higher than 2 nd order, and with further higher order modal analysis, it is possible to detect more information about modal interaction, which might be useful in power system control.

关键词： power system dynamics power system modeling power system analysis computing power system control Modal analysis power system stability power systems power system interconnection Nonlinear dynamical systems Numerical simulation

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Development of a tool for the analysis of power system higher order oscillation

Development of a tool for the analysis of power system highe...

引用

IEEE General Meeting power& Energy Society

作者： Zhouqiang Wang Qi Huang Changhua Zhang Sichuan Provincial Key Laboratory of Power System Wide-area Measurement and Control University of Electronic Science and Technology Chengdu Sichuan China

The analysis of higher order modal interaction attracts much attention from scholars all over the world. The normal form theory and the modal series method offer new ideas for solving these problems. However, literature review and simulation show that modal analysis for a certain case with these approaches may obtain different results. In this paper, the currently available methods are integrated into a tool PSMAT (power system modal analysis tool), so that one can compare the results with different approaches, and then select the most appropriate method for his analysis purpose. The developed tool has all the functionalities in modal analysis as well as the quantitative indices. The design of the tool is described and case studies are presented. The results obtained with this tool are discussed. It is verified that this tool is effective, in both modal analysis and comparison of the approaches.

关键词： power system analysis computing Modal analysis power system modeling power system simulation power system stability power system interconnection Taylor series Signal analysis Performance analysis Equations

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Design of an adaptive on-load de-icing scheme for overhead power transmission line

Design of an adaptive on-load de-icing scheme for overhead p...

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IEEE General Meeting power& Energy Society

作者： Qi Huang Yong Chen Changhua Zhang Sichuan Provincial Key Laboratory of Power System Wide-area Measurement and Control University of Electronic Science and Technology Chengdu Sichuan China

This paper reports part of the results in the project to develop an on-load de-icing system. In the system, a high frequency high voltage excitation with adjustable frequency, is used to de-ice the ice covered on long power transmission line. The system is highly efficient in de-icing due to the joint heating effect brought by transmission line loss and dielectric loss. The mathematical model of the system is developed. And on the basis of analysis and numerical simulation results, an adaptive scheme is designed. In the system, networked sensors are deployed to monitor the ice condition on transmission line, and on-line regulate the frequency of the high-voltage excitation according to the monitored ice information, to ensure that there is no severe ice-covering spot on long transmission line.

关键词： power transmission lines Frequency Ice Dielectric losses Propagation losses Condition monitoring Voltage Heating Mathematical model Numerical simulation

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