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

作者： Bo Hu Ding Liu Chuanzhi Zang Yue Wang Wanting Li Yuqi Liu Peng Zeng State Grid Liaoning Electric Power Co. Ltd. Liaoning Shenyang China Key Laboratory of Networked Control System Shenyang Institute of Automation Chinese Academy of Sciences Liaoning Shenyang China Chinese Academy of Sciences University Beijing China Liaoning Lightning Protection Technical Service Center Shenyang Liaoning China

ISBN: (数字)9781728196060

ISBN: (纸本)9781728196077

Combined heat and power (CHP) can simultaneously produce electrical and thermal energy. CHP is an important and main component of the power system in areas with heat demand. However, its operating mode limits the flexibility of the system and aggravates the waste of renewable energy. This paper presents a coordinate dispatch algorithm for electric heating integrated energy system (EHIES), a combined heat and power system with wind power. An efficient optimization algorithm based on dynamic programming (DP) is developed, which overcomes the challenges of solving high dimensional optimization problems for the EHIES. The results of simulation experiments show that the proposed coordinate dispatch algorithm can meet the scheduling time requirements, reduce the operating cost of the system and realize the full consumption of wind power.

关键词： Cogeneration Heuristic algorithms Wind power generation Dynamic programming Optimization Space heating Resistance heating

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One New Distributed Low-Power and High-Precision Fault Recording system Based on STM32L4+

One New Distributed Low-Power and High-Precision Fault Recor...

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第三十八届中国控制会议

作者： Fuchun Liu Dehua Yang Yun He Lin Zou Yao Yuan Huanrui Liu College of Automation Science and Engineering The Key Laboratory of Autonomous Systems and Networked Control(ASNC) Ministry of Education South China University of Technology Electric Power Research Institute CSG

The fault recording monitoring system is a kind of automatic information recording equipment for distribution network that is put into operation all the year round. It is used to monitor the operation status of the power system to analyze the cause of the fault, quickly and accurately locate the fault occurrence point, monitor and verify the action characteristics of the relay protection automatic device, etc. Different from the centralized fixed structure of the traditional microcomputer-based fault recorder, we designed a modular distributed grid fault recording system with ultra-low-power characteristic. According to the precision complementary characteristics of the global positioning system(GPS) and the crystal clock signal, the GPS clock is used to calibrate the system clock to realize the microsecond high-precision clock, which meets the high requirements of synchronization acquisition of the three-phase current. The effectiveness of the proposed synchronization algorithm is validated by experiments on actual system.

关键词： fault recorder STM32L4 ultra-low-power GPS time calibration

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Design and Implementation of a new Fault Indicator for Power system based on Ultra-Low-Power MCU

Design and Implementation of a new Fault Indicator for Power...

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第三十八届中国控制会议

作者： Yun He Dehua Yang Fuchun Liu Xiangyang Li Lin Zou Yao Yuan Huanrui Liu College of Automation Science and Engineering The Key Laboratory of Autonomous Systems and Networked Control（ASNC） Ministry of Education South China University of Technology Electric Power Research Institute CSG

With the increasing scale of the power grid, real-time monitoring requirements for on-site data of power systems in various countries around the world are getting higher and higher. The high-voltage distribution network is widely distributed,spanning rivers, rivers, mountains, deep valleys, jungles, and other complex and variable environments so that it is susceptible to short-circuit faults caused by various natural disasters and other environmental factors. Single-phase ground faults are also common in the grid, and working information and necessary alarm indications during network operation are also *** real-time monitor of the line current is indispensable for short-circuiting faults, while ground faults need to monitor the zero-sequence voltage in the substation and call the original sampled data for analysis. When there is a transient short-circuit fault in the distribution network, the transmission line resumes operation after reclosing, but the hidden danger still exists. In the fault recording system, the data can be analyzed in time to avoid the fault happening again. For the permanent short-circuit fault, the fault still exists after the gate reclosing. The analyze of recorded data can avoid strong power transmission measures of the system which can reduce the secondary impact and minimize the loss caused by the fault. In response to these functional requirements, this paper designs a new fault recording system and introduces its hardware structure and function implementation.

关键词： fault detection current sampling 4G LORA zero sequence voltage

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Two-layer structure predictive control of target tracking mode for dual time-scale system

Two-layer structure predictive control of target tracking mo...

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Chinese Automation Congress (CAC)

作者： Hongrui Wang Tao Zou Zhijia Yang Hongyu Zheng State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences Shenyang China Key Laboratory of Networked Control System Chinese Academy of Sciences Shenyang China Chinese Academy of Sciences Institutes for Robotics and Intelligent Manufacturing Shenyang China University of Chinese Academy of Sciences Beijing China Shenyang China College of Mechanical and Electrical Engineering Guangzhou University Guangzhou China Institute of Intelligent Manufacturing Huanghuai University Zhumadian China

ISBN: (数字)9781728176871

ISBN: (纸本)9781728176888

In the dual time-scale system, the time for the fast and slow model to reach steady-state values is inconsistent. Based on the "point" model strategy of integral variables, this paper compares and analyzes the slow model variables with the integral variables and designs a two-layer structure predictive controller for the dual time-scale system under the model truncation. The steady-state optimization layer uses the step response characteristics of slow model variables to derive the multi-step controlled variable prediction values after the truncation point. Based on the improved displacement matrix, the error correction coefficient is modified by introducing an error compensation factor in the dynamic control layer to reduce the accumulated error of model truncation. Under the truncated dual time-scale system model, the improved strategy proposed in the paper can not only maintain the amount of calculation of the predictive control but also solve the problem that the steady-state target calculation is not accurate enough due to model mismatch. Finally, the elfectiveness of the improvement strategy is verified by simulation comparison.

关键词： Robots Optimized production technology Manufacturing control systems Automation Target tracking Steady-state

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Modern coprophilous fungal spores and their ecological indication from lakes in the Inner Mongolia steppe and surrounding areas

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CATENA 2025年 258卷

作者： Jun Zhang Xiaozhong Huang Xiuxiu Ren Derui Luo Min Zheng School of Geographical Sciences China West Normal University Nanchong 637009 China Sichuan Provincial Engineering Research Center of Monitoring and Control for Soil Erosion in Dry Valleys China West Normal University Nanchong 637009 China Liangshan Soil Erosion and Ecological Restoration in Dry Valleys Observation and Research Station Xide 616753 China MOE Key Laboratory of Western China’s Environmental Systems College of Earth and Environmental Sciences Lanzhou University Lanzhou 730000 China Key Laboratory of Mongolian Plateau’s Climate System at Universities of Inner Mongolia Autonomous Region College of Geographical Sciences Inner Mongolia Normal University Hohhot 010022 China

Modern process studies of coprophilous fungal spores are crucial for better interpreting the fossil records. However, studies investigating the distribution and assemblages of these spores in lake surface sediments remains relatively sparse in northern China, a region where pastoralism constitutes the primary subsistence strategy. Here, 44 lake surface sediment samples were collected in the Inner Mongolia steppe and its surrounding areas, and the characteristics and ecological significance of coprophilous fungal spores were discussed for the first time. The results showed that a total of 40 fungal spore types were identified from the modern samples, including 11 common coprophilous fungal spore types dominated by Sporormiella -type, Sordaria spp., Coniochaeta cf. ligniaria , and Coniochaeta sp.. The samples of shrub vegetation areas contained the highest abundance of coprophilous fungal spores, followed by the samples of cultivated vegetation, meadow vegetation, and steppe vegetation areas, while the samples of desert and broad-leaved forest vegetation areas showed the lowest abundance. The results of grouping analysis and non-parametric tests found that the combined abundance of Sporormiella -type, Sordaria spp., Delitschia spp., Podospora sp., Coniochaeta sp., Cercophora sp., and Arnium sp. provides a more reliable indicator of regional grazing intensity in the region. This study clarifies the indication of coprophilous fungal spores on grazing intensity in the Inner Mongolia steppe and its surrounding areas, and provides a theoretical basis for further research on past grazing intensity and pastoralism history from lake sediments in the region.

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Quasi-fixed Frequency and Phase Modulation Synchronous control Based LCC Resonant Converter

Quasi-fixed Frequency and Phase Modulation Synchronous Contr...

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Chinese Automation Congress (CAC)

作者： Dejun Kong Ying Feng School of Automation Science and Engineering South China University of Technology Guangzhou China Key Laboratory of Autonomous Systems and Networked Control Ministry of Education South China University of Technology Guangzhou China

This paper presents a novel quasi-fixed frequency based synchronous control scheme for the LCC resonant converter to suit the high frequency, low voltage and high current operating condition. Utilizing ZVS technique, the proposed method can guarantee the reliable load control ability and ensure the stable zero voltage by adjusting the frequency and the phase in the limited range. To show the effectiveness of the control algorithm, a LCC resonant converter with quasi fixed frequency (QFC) and phase modulation synchronous control is addressed in this paper. The LCC converter works in a continuous conduction mode near 700 kHz and implementing zero-voltage switching (ZVS) with 200-425 V input and 48 V/42 A output simultaneously, and it can suit the wide input/output range with high efficiency using the designed control scheme through the PSIM simulation results.

关键词： Resonant converters Resonant frequency Zero voltage switching Switching frequency Frequency control Frequency modulation Frequency conversion

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Position Tracking for Continuum Robots with Joint Limit Constraints

Position Tracking for Continuum Robots with Joint Limit Cons...

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International Conference on Unmanned systems and Artificial Intelligence

作者： Dengliang Lin Xin Dong Chenguang Yang Key Laboratory of Autonomous Systems and Networked Control College of Automation Science and Engineering South China University of Technology Guangzhou China Nottingham University Nottingham UK Bristol Robotics Laboratory University of the West of England Bristol UK

ISBN: (数字)9781728158594

ISBN: (纸本)9781728158600

This paper presents a novel tip-following approach for real-time position tracking and avoiding obstacle of continuum robots with joint limit constraints. This type of hyper-redundant robot, which is more flexible and compliant to explore in complex and constrained environments, such as in pipeline or narrow entrance. However, tradictional method based on inverse kinematic model is difficult to control the end-effector of continuum robot to avoid abstcales in the constrained circumstance. Therefore a new tip-following method based on forward kinematic model is proposed to control the robot and make it inspect the environment. For the method, we use nonliner progamming approach to solve the optimization problem, which is used to find minimum of constrained nonlinear objective function to ensure that the end-effector of the robot follow the desired position with minimal error. In this paper, we employ a 24 DoF continuum robot with continuous backbone and compliant joint to the simulation, and it is testified that the proposed approch can ensure joint limit avoidance, track the end postion in real time and minimize the tracking errors.

关键词： hyper-redundant robots obstacle avoidance tip-following control kinematic model kinematics Robot Redundant robot Obstacle avoidance Continuum Location tracking Collision avoidance Joints end effectors

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Long-term Exposure to Major Constituents of PM 2.5 and Executive Function Among Children and Adolescents in China

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Environmental Pollution 2025年

作者： Hua-Lian Chen Qing-Guo Zeng Jing Wei Qiong Zhang Hui-Xian Zeng Katja Kanninen Bin Jalaludin Jian Dai Yuan Lv Bin Zhao Pasi Jalava Guang-Hui Dong Xiao-Wen Zeng Joint International Research Laboratory of Environment and Health Ministry of Education Guangdong Provincial Engineering Technology Research Center of Environmental Pollution and Health Risk Assessment Department of Occupational and Environmental Health School of Public Health Sun Yat-sen University Guangzhou 510080 China Department of Atmospheric and Oceanic Science Earth System Science Interdisciplinary Center University of Maryland College Park MD USA A.I.Virtanen Institute for Molecular Sciences University of Eastern Finland Kuopio Finland School of Public Health and Community Medicine The University of New South Wales Kensington 2052 Australia Department of Clinical Psychology Jiangbin Hospital Guangxi Zhuang Autonomous RegionNanning 530021 China Department of Neurology Jiangbin Hospital Guangxi Zhuang Autonomous Region Nanning 530021 China State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084 China Department of Environmental and Biological Science University of Eastern Finland Kuopio Finland

Epidemiological evidence regarding the effects of long-term exposure to fine particulate matter (PM 2.5 ) constituents on executive function (EF) in children and adolescents is limited. This cross-sectional study analyzed 67,622 children and adolescents aged 5-18 from China (2020-2021) and calculated the five-year average concentrations of PM 2.5 and its six constituents using the ChinaHighAirPollutants (CHAP) dataset. EF was assessed using the parent-completed Behavioral Rating Inventory of Executive Function (BRIEF). Generalized linear mixed models and weighted quantile sum regression were applied to evaluate the potential effects of individual PM 2.5 components and their mixtures. Long-term exposure to PM 2.5 and its components was linked to poorer EF (e.g., global executive composite (GEC) and metacognition index). For example, compared with the lowest quartile, the highest quartiles of PM 2.5 components were linked to higher risks for GEC dysfunction (e.g., odd ratio (OR) was 1.23 (1.05, 1.44) for ammonium (NH 4 + ), 1.14 (1.01, 1.29) for organic matter (OM) and 1.18 (1.05, 1.32) for black carbon (BC)). Similarly, joint exposure to PM 2.5 constituents was related to GEC dysfunction (OR = 1.08 (1.03, 1.13)), with BC and NH 4 + contributing more significantly to the association. Additionally, children under 12 years and those with parental education levels below high school appear to be more susceptible to the effects of PM 2.5 constituents. In conclusion, the reduction of combustion-related BC and NH 4 + may reduce the burden of PM 2.5 -related executive dysfunction in children and adolescents.

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A novel fault classification method based on neural network in smart grid

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International Journal of Electrical Engineering 2018年第1期25卷 1-7页

作者： Zhang, Tong Sun, Lanxiang Liu, Jianchang Yu, Haibin College of Information Science and Engineering Northeastern University Shenyang China State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Shenyang China Shenyang Institute of Automation Chinese Academy of Sciences Shenyang China Key Laboratory of Networked Control System CAS Shenyang China University of Chinese Academy of Sciences Beijing China

This paper presents a back propagation (BP) neural network method to identify fault types and phases in the smart grid with renewable sources. A fault classification method based on the BP neural network is used to identify patterns of voltage and current measured with phasor measurement unit (PMU). The voltage and current values are decomposed, and then they are used as the input matrix of the BP neural network, which identifies the fault type and fault phasor. All the common short-circuit faults occurred are analyzed, BP neural network method is proposed for fault classification in a power active distribution network. Simulation results show feasibility and usefulness of the BP neural network method, which provides good classification performances.

关键词： Smart power grids

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A Map Accessibility Analysis Algorithm for Mobile Robot Navigation in Outdoor Environment

A Map Accessibility Analysis Algorithm for Mobile Robot Navi...

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IEEE International Conference on Real-time Computing and Robotics (RCAR)

作者： Xiangyu Yu Jingchuan Wang Weidong Chen Hesheng Wang Ministry of Education of China Key Laboratory of System Control and Information Processing and Institute of Medical Robotics Shanghai Jiao Tong University and Autonomous Robot Lab Shanghai China

ISBN: (数字)9781728137261

ISBN: (纸本)9781728137278

autonomous mobile robots have been widely used to perform specific tasks in recent decades. Map accessibility analysis is necessary for those robots to achieve safe and efficient path planning and navigation, especially in outdoor environment where the terrain can be uneven. Researchers have done sufficient works on the influences of different factors. However, integrating these factors is still a great challenge since the information of some constraints are only needed for specific robot tasks. In this paper, we firstly build a Three Dimensional (3D) Occupancy Grid Map (OctoMap) using a 3D Lidar and encoder-based odometer, and then extract different factors from the OctoMap and real-time lidar data. In order to analyze the relationship between map accessibility and variety of constraints, we design an open system and propose a map accessibility analysis algorithm to integrate different factors which have influence on mobile robot navigation. The system and algorithm are demonstrated to be efficient via experiments.

关键词： Three-dimensional displays Mobile robots Laser radar Navigation Task analysis Real-time systems

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