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Multi-Step Clustering of Smart Meters Time Series:Application to Demand Flexibility Characterization of SME Customers

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 869-907页

作者： Santiago Bañales Raquel Dormido Natividad Duro department of Computer Sciences and automatic control Universidad Nacional de Educación a Distancia(UNED)Madrid28040Spain Iberdrola Innovation Middle East Doha210177Qatar

Customer segmentation according to load-shape profiles using smart meter data is an increasingly important application to vital the planning and operation of energy systems and to enable citizens’participation in the energy *** study proposes an innovative multi-step clustering procedure to segment customers based on load-shape patterns at the daily and intra-daily time *** meter data is split between daily and hourly normalized time series to assess monthly,weekly,daily,and hourly seasonality patterns *** dimensionality reduction implicit in the splitting allows a direct approach to clustering raw daily energy time series *** intraday clustering procedure sequentially identifies representative hourly day-unit profiles for each customer and the entire *** the first time,a step function approach is applied to reduce time series *** attributes embedded in surveys are employed to build external clustering validation metrics using Cramer’s V correlation factors and to identify statistically significant determinants of load-shape in energy *** addition,a time series features engineering approach is used to extract 16 relevant demand flexibility indicators that characterize customers and corresponding clusters along four different axes:available Energy(E),Temporal patterns(T),Consistency(C),and Variability(V).The methodology is implemented on a real-world electricity consumption dataset of 325 Small and Medium-sized Enterprise(SME)customers,identifying 4 daily and 6 hourly easy-to-interpret,well-defined *** application of the methodology includes selecting key parameters via grid search and a thorough comparison of clustering distances and methods to ensure the robustness of the *** research can test the scalability of the methodology to larger datasets from various customer segments(households and large commercial)and locations with different weather and socioeconomic conditio

关键词： Electric load clustering load profiling smart meters machine learning data mining demand flexibility demand response

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MECHANISM OF IMPLICIT DIFFERENTIATION AND IMPLICIT INTEGRATION IN automatic control

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Chinese Science Bulletin 1990年第11期35卷 962-964页

作者：涂承媛 department of automatic control Beijing Polytechnic University Beijing 100022 PRC

PID control is widely used in various process control systems with a differentiation function aimed at acquiring a good transient response of the systems and with an integration function aimed at improving the static ... 详细信息

关键词： aimed acquiring saturation extreme exact operations furthermore multistage attached proportional

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THE MECHANISM OF automatic control WITH VARIABLE STRUCTURE-PARAMETERS

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Chinese Science Bulletin 1991年第2期36卷 167-169页

作者：涂承媛 department of automatic control Beijing Polytechnic University Beijing 100022 PRC

The general form of the dynamic response of a controlled process is shown in Fig. 1, where E is the deviation of the controlled variable U from its set-point value U0 （i. e. E= U0-U）. For convenience in discussing, we transform the curve in Fig. 1 into that in Fig. 2 a t-domain curve of |E|. Now, we discuss a certain period of variation of the curve in Fig. 2, e.g. a time interval between to and t4.We partition this period of variation into four subintervals: t0—t1, t1—t2, t2—t3 and t3—t4. It is easily seen that, in the first and the third subintervals, the rate of change

关键词： deviation partition convenience brought unfavorable eliminate fourth weakened tendency hence

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Application of Fractal Theory in Simulation of Ferromagnetic Elements' Hysteresis Loop in Transformer

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Journal of Beijing Institute of Technology 2003年第2期12卷 113-118页

作者：毕军付梦印张宇河 department of automatic control

The simulation of the transformer transient is one of the indispensable qualifications for improving the performance of transformer protection, the key technique of the transformer's transient simulation is the treatment of ferromagnetic elements' loop. Thus the shapes of the primary hysteresis loop and each internal secondary hysteresis loop in the identical magnetism conducting are analyzed, and then it is proposed that there are some fractal characteristics in the relation between them. The fractal phenomenon of the ferromagnetic elements' hysteresis loop in the transformer's transient simulation is first brought forward, the mutuality between the ferromagnetic elements' primary hysteresis loop and its secondary hysteresis loops is revealed in mechanism by using the fractal theory. According to the iterated function system of fractal theory, the secondary hysteresis loops can be generated by the iterative calculation of the primary loop. The simulation results show the validity of this idea.

关键词： fractal theory hysteresis loop transformer simulation

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Fully Pipelined Soft Vector Processor as a CPU Accelerator

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Chinese Journal of Electronics 2017年第6期26卷 1198-1205页

作者： PANG Yeyong WANG Shaojun PENG Yu PENG Xiyuan department of automatic Test and control Harbin Institute of Technology

FPGA based soft vector processing accelerators are used frequently to perform highly parallel data processing tasks. Since they are not able to implement complex control manipulations using software, most FPGA systems now incorporate either a soft processor or hard processor. A FPGA based AXI bus compatible vector accelerator architecture is proposed which utilises fully pipelined and heterogeneous ALU for performance, and microcoding is employed for reusability. The design is tested with several design examples in four different lane *** with Central processing unit(CPU), Digital signal processor(DSP), Altera C2H tool and Open CL SDK implementations, the vector processor improves on execution time and energy consumption by factors of up to 6.6 and 6.4 respectively.

关键词： FPGA Vector processor Microprocessor Accelerator

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Pneumatic Rotary Actuator Angle control System

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Journal of Beijing Institute of Technology 2003年第4期12卷 362-365页

作者：王鹏彭光正伍清河 department of automatic control

Based on the adaptive control method, a kind of parameter adjustor was used to control pneumatic rotary actuator to track the expected output. The system uses electropneumatic proportional valve as control device, which adjusts the gas flow of actuator 's two cavities, then changes the pressure of cavity and pushes the piston of actuator to move, so the rotary actuator 's axis can be made to revolve to the required angle at last. According to the characteristic of pneumatic system, the control system was described with a fourth-order mathematic model. The control rule is deduced by model reference adaptive control method. By the result of experiment, it was proved that by using the adaptive control method, the output of rotary actuator could track the expected value timely and accurately.

关键词： pneumatic rotary actuator angle control system mathematic model model reference adaptive control system

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Multi-Valued Associative Memory Neural Network

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Journal of Beijing Institute of Technology 2003年第4期12卷 352-356页

作者：修春波刘向东张宇河 department of automatic control

A novel learning method for multi-valued associative memory network is introduced, which is based on Hebb rule, but utilizes more information. According to the current probe vector, the connection weights matrix could be chosen dynamically. Double-valued and multi-valued associative memory are all realized in our simulation experiment. The experimental results show that the method could enhance the associative success rate.

关键词： associative memory learning method neural network gray-scale images

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Adaptive Federal Kalman Filtering for SINS/GPS Integrated System

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Journal of Beijing Institute of Technology 2003年第4期12卷 371-375页

作者：杨勇缪玲娟 department of automatic control

A new adaptive federal Kalman filter for a strapdown integrated navigation system/global positioning system (SINS/GPS) is given. The developed federal Kalman filter is based on the trace operation of parameters estimation's error covariance matrix and the spectral radius of update measurement noise variance-covariance matrix for the proper choice of the filter weight and hence the filter gain factors. Theoretical analysis and results from simulation in which the SINS/GPS was compared to conventional Kalman filter are presented. Results show that the algorithm of this adaptive federal Kalman filter is simpler than that of the conventional one. Furthermore, it outperforms the conventional Kalman filter when the system is undertaken measurement malfunctions because of its possession of adaptive ability. This filter can be used in the vehicle integrated navigation system.

关键词： SINS/GPS integrated navigation federal Kalman filtering adaptive filtering

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Research on Digital Dynamic Testing Technique for Electrohydraulic Servovalve

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Journal of Beijing Institute of Technology 2003年第4期12卷 357-361页

作者：汪首坤王军政赵江波张宇河 department of automatic control

The digital testing technique based on computers for dynamic characteristics of electrohydraulic servovalves via frequency scan method is researched. The no-load piston which measures the servo's transient output flow is designed properly. The velocity testing method by which the speed signal can be obtained indirectly by means of a piezoelectral accelerometer is given. High speed sampling has been realized in Windows OS. Wavelet denoising and Fourier transform are adopted in data processing and analyses. The testing technique discussed has been applied to actual testing systems and the experimental results have proved it to be correct.

关键词： electrohydraulic servovalve frequency response no-load piston wavelet transformation frequency scan

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Tank Fire control Systems Accuracy Assignment Based on Fuzzy Comprehensive Judgment Method

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Journal of Beijing Institute of Technology 2003年第4期12卷 347-351页

作者：刘文果陈杰窦丽华 department of automatic control

A method of accuracy assignment based on fuzzy comprehensive judgment method (FCJM) in tank fire control system is proposed. From the flowing route of the error sources and their respective correlative signals, the transfer functions of several sources are analysed by means of mathematic simulation, and FCJM is applied to obtain the cost comprehensive factor for each part of system, combining its error sensitivity factor the mathematical model is built to solve the accuracy assignment problem. Simulation result shows the proposed method can help designer of tank fire control system work out an optimal system more efficiently and more economically.

关键词： fire control system accuracy assignment error sources fuzzy comprehensive judgment

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