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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

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.

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

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Smart Grid Facing the New Challenge: The Management of Electric Vehicle Charging Loads

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Energy Procedia 2011年 12卷 98-103页

作者： Changhua Zhang Qi Huang Jiashen Tian Lei Chen Yongxing Cao Ran Zhang Sichuan Provincial Key Lab of Power System Wide-area Measurement and Control University of Electronic Science and Technology of China. Chengdu China Sichuan Electric Power Test & Research Institute Chengdu China

Because of the energy shortage, air pollution and greenhouse gas over mission, the plug-in electric vehicles can be looked as the alternative of the current fossil fuels vehicles. But PHEVs charging brings out the serious problem to the power systems security operation. Smart grid, with its flexible operation ways, is likely to solve this problem. This paper discusses the relationship between the smart grid and the PHEVs charging load. Then introduce the PHEVs influence on the power system based its different operation model. The third part presents the coordinated charging schedule model and in the last part, some core technologies to construct the communication net are also discussed.

关键词： Charging loads plug-in hybrid electric vehicles (PHEV) smart grid zigbee

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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...

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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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Separated Double-Layer Magnetic Shielding with Magnetic Sensor for Large Current measurement

Separated Double-Layer Magnetic Shielding with Magnetic Sens...

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2018 International Conference on Innovative Smart Grid Technologies, ISGT Asia 2018

作者： Chen, Yafeng Huang, Qi Khawaja, Arsalan Habib Sichuan Provincial Key Lab of Power System Wide-Area Measurement and Control School of Energy Science and Engineering University of Electronic Science and Technology of China Chengdu China U.S.- Pakistan Center for Advanced Studies in Energy National University of Sciences and Technology Islamabad Pakistan

ISBN: (纸本)9781538642917

One drawback of contactless current measurement by magnetic sensor is that its detected results can be easily affected by the superposition of the external magnetic interference. Damping the effect of the noise is complex and delicate without the knowledge of the interference. The usage of magnetic shielding is one potent way to compensate the shortcoming. However, complete magnetic shielding fails to provide the shielding for the shielding only happens within the material. Therefore, in this paper, a separated double-layer structure with the gap is proposed for large current measurement with strong magnetic noise from random places. The ambition is to keep the targeted magnetic field within the shielding stable even when exposed to strong magnetic interference environment. Parameters of the designed structure are investigated and the validation of the structure is confirmed by finite element analysis method when the magnitude of the current under measurement ranging up to 1000 A. From FEA method, when the interference is at arbitrary places around the conductor, the standard deviation without and with noise is less than 0.13, authenticating the efficacy of this shielding structure. © 2018 IEEE.

关键词： Magnetic sensors

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A panoramic test system for intelligent substation based on wireless time synchronization technology

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Dianli Xitong Zidonghua/Automation of Electric power systems 2013年第2期37卷 72-78页

作者： Jing, Shi Huang, Qi Zhen, Wei Wang, Biao Key Lab of Wide-area Measurement and Control on Power System of Sichuan Province University of Electric Science and Technology of China Chengdu 611731 China Sichuan Electric Power Research Institute Chengdu 610072 China

The organization and distribution of information in secondary system of intelligent substation is so complex that it is almost impossible to use traditional test approach to identify the drawbacks. A novel panoramic test method based on wireless time synchronization technology is presented and the corresponding system is developed. The proposed system performs debugging test of intelligent substation secondary system under steady-state and transient state based on numerical simulation of power network, distributed injection of synchronized signals, wireless time synchronization and data transmission, etc. Total design of the test system and implement scheme of wireless synchronization technology is described. And accuracy of synchronization has been verified. The developed system has been applied to the test of many intelligent substations under construction. It shows that the proposed approach improves the integrity and the efficiency of the test, achieving better test results. © State Grid Electric power Research Institute Press.

关键词： Synchronization

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

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

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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

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： Indexes Reactive power Potential energy Equations Generators Mathematical model Production

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A Two-Stage Robust Scheduling Strategy for Multi-Energy Microgrid Considering Multiple Uncertainties 8

A Two-Stage Robust Scheduling Strategy for Multi-Energy Micr...

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8th International Conference on power Energy systems and Applications, ICoPESA 2024

作者： Zhang, Sen Hu, Weihao Cao, Xilin Zhao, Yincheng Liu, Rundong Ma, Haojie Zhan, Wei Li, Mingxuan School of Mechanical and Electrical Engineering University of Electronic Science and Technology of China Sichuan Provincial Key Lab of Power System Wide Area Measurement and Control Chengdu China School of Management and Economics Beijing Institute of Technology Beijing China SPIC Southwest Energy Research Institute Chengdu China

ISBN: (纸本)9798350351668

To achieve the economic operation of a multi-energy micro grid under multiple uncertain environments, this study introduces a novel two-stage robust scheduling approach, encompassing both day-ahead planning and real-time adjustments. First, the multi-energy micro grid day-ahead economic dispatch model is constructed based on the prediction scenarios, and integrated demand response is considered to increase the flexibility of the system. Afterwards, the strategy is adjusted in the real-time phase, considering the uncertainty of energy production and consumption. The Column-and-Constraint Generation algorithm is employed to resolve the above two-stage issues effectively, and the optimal economic operation strategy of the MEMG is obtained. Finally, a case study demonstrates the economy and robustness of the proposed methodology. © 2024 IEEE.

关键词： Demand response

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A double-ended contactless current traveling waves scheme for fault location in overhead transmission lines 4

A double-ended contactless current traveling waves scheme fo...

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4th IEEE Conference on Energy Internet and Energy system Integration, EI2 2020

作者： Ayambire, Patrick Nyaaba Huang, Qi Bamisile, Olusola Anane, Paul Oswald Kwasi Awopone, Albert K. Sichuan Provincial Key Lab of Power System Wid-Area Measurement and Control School of Mechanical and Electrical Engineering Chengdu China University of Education College of Technology P.O. Box 1277 Winneba Kumasi Ghana

ISBN: (纸本)9781728196060

This study presents a contactless current traveling wave fault location scheme for a two-terminal overhead transmission line based on a tunnel Magnetoresistive sensor. The proposed method is implemented by installing a tunnel Magnetoresistive sensor array at both ends of the line for current traveling wave measurement. The measured data is transmitted to a remote monitoring unit (RMU) for analysis. The performance of the proposed method is evaluated for different fault situations using an experimental set-up. The proposed exhibited high efficiency for current traveling wave fault location. The results were analyzed for fault location using the differentiator smoother to reduce the time of arrival errors. The proposed scheme is compared with a general traveling wave-based scheme for transmission line fault distance location. In all test cases, the proposed scheme offered very efficient results for all categories of faults with an average relative error of 0.024%. © 2020 IEEE.

关键词： Location

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DC Bus Voltage Regulation for Distributed Energy Sources through Buck-Boost Converter in a Direct Current Micro Grid

DC Bus Voltage Regulation for Distributed Energy Sources thr...

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2019 IEEE PES Innovative Smart Grid Technologies Asia, ISGT 2019

作者： Solangi, Asif Raza Huang, Qi Raza, Ghalib Abbas, Muneer Solangi, Siraj Hyder 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 China Benazir Bhutto Shaheed University of Technology and Skill Development Khairpur Pakistan Indus University Karachi Pakistan University of Sindh Jamshoro Pakistan

ISBN: (纸本)9781728135205

Direct current micro-grid (DCMG) based on renewable energy sources (RES) is facing an issue of maintaining standard voltage at DC bus under variable power generation and utilization. This paper proposes the DCMG based on distributed energy sources (DES) and buck-boost converter to maintain standard voltage at DC bus. Photovoltaic panel (PV), wind turbine (WT) and battery are utilized as DES. PV, battery and WT are linked to DC bus through buck-boost converter. The simulation model of PV and WT has been developed using MULTISIM simulation tool. To measure the performance of the designed system, the DC load of 500 watt has been organized for DCMG system. The protection from reverse current flow and over voltage is also provided. The simulation outcomes verified that, at DC bus standard voltage has been maintained for both utilization and generation. © 2019 IEEE.

关键词： Wind turbines

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