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IEEE Conference on Energy Internet and Energy system Integration (EI2)

作者： Asif Raza Qi Huang Jian Li Olusola Bamisile Cai Dongsheng Ghalib Raza 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 College of Nuclear and Automation Engineering Chengdu University of Technology 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 University of Electronic Science & Technology of China College of Nuclear and Automation Engineering Chengdu University of Technology Sichuan P.R. China Benazir Bhutto Shaheed University of Technology & Skill Development Khairpur Pakistan

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.

关键词： Renewable energy sources system integration control systems Steady-state power conversion Voltage control PSCAD

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An Economic Scheduling Strategy of Photovoltaic Storage Micro-grid Considering Demand Response

An Economic Scheduling Strategy of Photovoltaic Storage Micr...

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IEEE Asia power and Energy Engineering Conference (APEEC)

作者： Rundong Liu Sen Zhang Yincheng Zhao Haojie Ma Luan Chen Weihao Hu Ming Tang Wei Zhan Qingjia Zhou 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 SPIC Sichuan Electric Power Co. LTD Chengdu China SPIC Southwest Energy Research Institute Chengdu China

ISBN: (数字)9798350373479

ISBN: (纸本)9798350373486

To realize the economic optimization dispatch of PSMG (Photovoltaic Storage Micro-grid), considering the stochastic influence of multiple uncertainties, this study formulates a day-ahead optimal dispatching strategy of PSMG with the minimum comprehensive operating cost as the objective function. Firstly, the source-load uncertainty is dealt with by scenario generation using the Monte Carlo method and k-means clustering algorithm. Then the peak shaving ability of the system is enhanced by the introduction of flexible loads, and the scheduling flexibility of the photovoltaic storage system is increased by the integrated demand response increases the scheduling flexibility of the photovoltaic storage system. Finally, simulation results show that the scheduling scheme can prompt the source-load to participate in peak shaving and valley filling at the same time, increase the new energy consumption capacity of the photovoltaic storage micro-grid, and effectively improve the economic and social benefits of the micro-grid.

关键词： Photovoltaic systems Uncertainty Fluctuations Costs Monte Carlo methods Simulation Demand response

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Study on an improved Normal Form solution and reduced-order mode reconstruction in power system

Study on an improved Normal Form solution and reduced-order ...

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IEEE Region 10 International Conference TENCON

作者： Zhouqiang Wang Qi Huang Sichuan Provincial Key Lab of Power System Wide-area Measurement and Control University of Electronic Science and Technology of China (UESTC) Chengdu Sichuan China Dept. of Electrical Engineering Sichuan Engineering Technical College (SCETC) Deyang Sichuan China University of Electronic Science and Technology of China Chengdu CN

ISBN: (纸本)9781479986422

With the polynomial vector space decomposition by using Normal Form theory, the normalized analytical solutions of modal resonance are derived, which solves that the traditional Normal Form solution cannot be easily obtained under resonant condition. Based on the solution, from the viewpoint of whether the modal interaction couples and resonates or not, the nonlinear terms are decomposed into four types, i.e., uncoupled nonresonant terms, coupled nonresonant terms, uncoupled resonant terms and coupled resonant terms. The corresponding modes are categorized into 5 types, i.e., single modes, uncoupled nonresonant modes, coupled nonresonant modes, uncoupled resonant modes and coupled resonant modes. A reduced-order mode reconstruction based on least square method to estimate the coefficients of higher-order interactional modes is proposed. This might be potentially a new approach to cope with the challenge from huge amount of higher-order modes in higher-order nonlinear analysis. Two case studies are presented to analyze the types and reconstructions of the nonlinear modes, 2nd- and 3rd- order terms, which verifies the effectiveness of the proposed approach.

关键词： Mathematical model power system dynamics Yttrium Couplings Least squares methods Eigenvalues and eigenfunctions

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Energy scheduling for microgrids with renewable energy sources considering an adjustable convex hull based uncertainty set

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RENEWABLE ENERGY 2024年 220卷

作者： Qing, Ke Du, Yuefang Huang, Qi Duan, Chao Hu, Weihao Sichuan Normal Univ Sch Engn Chengdu Peoples R China Univ Elect Sci & Technol China Sichuan Prov Key Lab Power Syst Wide area Measurem Wide Area Measurement & Control Chengdu Peoples R China Southwest Univ Sci & Technol Sch Informat Engn Mianyang Peoples R China Xi An Jiao Tong Univ Sch Elect Engn Xian Peoples R China

In this paper, a risk-based robust energy scheduling model for microgrids is proposed to address the uncertainty of renewable energy sources (RESs). The proposed model introduces a novel adjustable convex hull based uncertainty set (ACHUS), which is a subset of the maximum uncertainty set, to quantify the uncertainty of RESs. The operational risk of an ACHUS is evaluated by a historical data-based method. This method defines the operational risk as the expected penalty cost of all historical data when the operational safety of the microgrid is guaranteed in the ACHUS. Based on the evaluation of the operational risk, a day-ahead energy scheduling model with the ACHUS for microgrids is formulated as a mixed integer nonlinear programming. By introducing auxiliary variables and constraints, the mixed integer nonlinear programming is converted into a solvable mixed integer linear programming. The effectiveness of the proposed method is validated on the IEEE 6-bus and 118-bus systems. The simulation results show that the proposed method can effectively reduce the conservativeness of uncertainty quantification and the improve the economic efficiency of the microgrid.

关键词： Microgrid Renewable energy source (RES) Adjustable convex hull based uncertainty set (ACHUS) Operational risk Energy scheduling

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A Double-ended Contactless Current Traveling Waves Scheme for Fault Location in Overhead Transmission Lines

A Double-ended Contactless Current Traveling Waves Scheme fo...

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IEEE Conference on Energy Internet and Energy system Integration (EI2)

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

ISBN: (数字)9781728196060

ISBN: (纸本)9781728196077

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%.

关键词： Wavelet transforms power transmission lines Current measurement Fault location Transmission line measurements Magnetoresistance Sensor arrays

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Research on Storage system Capacity of Distributed Wind power Based on Prediction Error Compensation

Research on Storage System Capacity of Distributed Wind Powe...

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International Conference on Smart Grid and Clean Energy Technologies

作者： Wen Yin Min Zhao Chao Wang Luan Chen Sichuan Provincial Key Lab of Power System Wide-area Measurement and Control University of Electronic Science Technology of China

ISBN: (纸本)9781467387729

According to the theory that wind power prediction error approximatively follows a normal probability distribution, this article introduces a concept of error tolerance rate of wind power prediction, and comes to the relationship between the capacity of energy storage system (ESS) and error tolerance rate. Furtherly, the relationship between the size of the storage capacity and the economic costs, as well as the relationship between the size of storage system capacity and some other factors that may affect the security and stability of grid, are explored. The results can guide to configure an appropriate capacity of the energy storage system under a reasonable error tolerance rate, so to ensure the safety and stability of grid and the economy can be simultaneously optimized to some extent.

关键词： Wind power forecasting Storage capacity Error tolerance rate Safety Economy

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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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IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia)

作者： Yafeng Chen Qi Huang Arsalan Habib Khawaja 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)9781538642924

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.

关键词： Interference Magnetic shielding Magnetic sensors Magnetic fields Magnetic noise Current measurement Conductors

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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...

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

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

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power Energy systems and Applications (ICoPESA), International Conference on

作者： Sen Zhang Weihao Hu Xilin Cao Yincheng Zhao Rundong Liu Haojie Ma Wei Zhan Mingxuan Li 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 School of Management and Economics Beijing Institute of Technology Beijing China SPIC Southwest Energy Research Institute Chengdu China

ISBN: (数字)9798350351668

ISBN: (纸本)9798350351675

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.

关键词： Uncertainty Costs Energy resolution Production Microgrids Predictive models Prediction algorithms Real-time systems Robustness Planning

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Multi-objective Optimization of A CCHP system Model Integrated with P2G for Decarbonization

Multi-objective Optimization of A CCHP System Model Integrat...

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IEEE Conference on Energy Internet and Energy system Integration (EI2)

作者： Pengyu Wei Olusola Bamisile Dongsheng Cai Jian Li Humphrey Adun Qi Huang School of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu China Sichuan Provincial Key Lab of Power System Wide-area Measurement and Control University of Electronic Science and Technology of China Chengdu China Energy Systems Engineering Department Cyprus International University KKTC Mersin Turkey

To realize the dual carbon policy, the goal of energy saving, and emission reduction, it is important to develop ways to better promote the low carbon economic operation of energy systems. Therefore, this research proposes an optimal operation strategy considering the electric-gas-cooling-heat demand response. Considering the demand response of each participant, an integrated energy system model with photovoltaic, wind energy, and traditional grid as energy supply. Also, electric energy, natural gas, cooling, and heating subsystems with co-production are established. With minimizing the overall system operation cost and optimizing environmental protection, the improved particle swarm optimization algorithm is used to solve the multi-constrained objective optimization problem. Finally, the optimized model is tested. The results from this study show that the energy system under cogeneration can find a balance between economy and environmental friendliness, and provide a reference for the subsequent energy supply configuration.

关键词： Photovoltaic systems Renewable energy sources Wind energy systems operation system integration Demand response Particle swarm optimization

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