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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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Application study on distribution network operations management system based on smart phones

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Journal of Convergence Information Technology 2012年第23期7卷 476-483页

作者： Yi, Jianbo Li, Yongbin Huang, Qi He, Sihai Sichuan Provincial Key Laboratory of Power System Wide-Area Measurement and Control University of Electronic Science and Technology of China UESTC Chengdu Sichuan Province 611731 China Jianyang Power Supply Bureau Sichuan Electric Power Company Jianyang Sichuan Province 641400 China

An application system of distribution network field operation and management (DNFQMS) based on smart phones and hybrid network communication technology is presented in this paper. The distribution network operation and maintenance management as an important part of the security of electricity supply is required to have high efficiency and reliability. In order to overcome the low efficiency and less standardized problems in traditional distribution network operation and maintenance, the novel DNFQMS proposed employs smart phones equipped with windows mobile operation system and mobile communication with general packet radio service (GPRS), then utilizes Internet to constructive web servers and mobile clients information system. The first step is to develop smart phones application software, which uses C# language to implement the field operations data real-time collection and process. The second step is web server design which has the ability to handle multimedia information and global position system (GPS) information. Finally, the E-sheet, multimedia and GPS data transmission technology are described in detail. Furthermore, the system performance test and the user application analysis verify the validity and reliability of the proposed system in the present paper.

关键词： Efficiency

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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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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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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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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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An anti mode mixing emd algorithm for detecting the characteristics of low frequency oscillations in power system

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Telkomnika - Indonesian Journal of Electrical Engineering 2013年第8期11卷 4742-4750页

作者： Yi, Jianbo Huang, Qi Jing, Shi Ding, Lijie University of Electric Science and Technology of China Key Lab of Wide-area Control and Measurement on Power System of Sichuan province Chengdu China Sichuan Electric Power Research Institute Chengdu China

The dynamics of modern interconnected power system is characterized by low frequency oscillations (LFOs) which are produced as results of various disturbances such as changes in loads, tripping of lines, faults, and other discrete events. A data driven empirical mode decomposition (EMD) method is applied to the detection of low frequency oscillation modes from disturbed trajectory with its strong non-stationary signal processing capability, but the mode mixing phenomenon serious impact on the analysis credibility and accuracy of EMD method. In this paper, an anti mode mixing EMD composite algorithm is proposed for detecting the characteristics of LFOs in power system. First, the improved frequency heterodyne method is proposed to increase the spectral distance between adjacent mode components in order to meet the octave resolution requirements. Second, the wavelet singularity detection technology is proposed to determine the adaptive sliding analysis window for each mode, in which there implements the intermittency mixed modes separation and their nonstationary parameters identification. Finally, the analysis result of interconnected grid test case verify that the proposed algorithm can effectively overcome the impact of the mode mixing existed in EMD and improve the characteristics detection accuracy of LFOs characteristics. © 2013 Universitas Ahmad Dahlan.

关键词： Mixing

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Optimization of Low-carbon Dispatching for Microgrid Based on Improved Particle Swarm Optimization

Optimization of Low-carbon Dispatching for Microgrid Based o...

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

作者： Huan Yang Dongsheng Cai Olusola Bamisile Jian Li Zhenyuan Zhang 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

In the context of carbon neutrality, the power industry is becoming the main battlefield of carbon emission reduction. However, the low-carbon transformation of energy structure is a complex long-term task, it needs to be analyzed in combination with the actual situation. This paper is based on the microgrid in the grid connection mode, considering microgrid power output and carbon emission constraints. An optimal model is proposed to reduce carbon emission cost, the optimal economic operation, and build a low-carbon scheduling model of a microgrid system. In this paper, the improved multi-objective particle swarm optimization algorithm is used to solve the problem. Finally, the simulation results verify the effectiveness of the model and the superiority of the improved algorithm.

关键词： Job shop scheduling Costs Wind energy Heuristic algorithms Optimal scheduling Microgrids system integration

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A Hierarchical Optimization-Based Model for Microgrids with Energy Storage Considering Operation Cost and Net Load Mean Square Error

A Hierarchical Optimization-Based Model for Microgrids with ...

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

作者： Zexiang Guan Dongsheng Cai Olusola Bamisile Jian Li Zhenyuan Zhang 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

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.

关键词： Renewable energy sources Costs Fluctuations Microgrids Mean square error methods Mathematical models Classification algorithms

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

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

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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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