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Power system and New Energy Technology Innovation Forum (NPSIF), Boao New Power system International Forum -

作者： Kangyangyong Cao Hongquan Xing Yilin Zhang Chuan Xue Feiyi Li Ziyang Gao State Grid Changchun Power Supply Company Changdian Group Cable Engineering Branch Changchun Jilin China Maintenance Department State Grid Changchun Power Supply Company Operation Changchun Jilin China Northeast Electric Power University engineering training and teaching center Jilin Jilin China Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education (Northeast Electric Power University) Jilin Jilin China

ISBN: (数字)9798331504557

ISBN: (纸本)9798331504564

With the continuous improvement and development of urban power grid structures, it is inevitable that cable lines will need to be renovated and replaced. In the process of cable construction, the traditional cable cutting process involves independent operations, requiring a large amount of equipment and occupying a large area. Workers need to wear protective clothing when cutting, which is inflexible and inefficient. This approach is no longer adequate for the diverse and complex construction sites of today. To this end, a new type of integrated power cable cutting device is specially designed and developed, which combines testing and cutting, reducing the use of cable cutting tools. The newly developed circuit cutter is designed with features such as compact size, high structural strength, good cutting effect, strong adaptability, and remote control function. It can significantly improve the safety and convenience of cable cutting operations, which is of positive significance for improving construction quality and efficiency and ensuring the personal safety of operators.

关键词： Technological innovation Power cables Protective clothing Power system stability Reliability engineering Power grids Safety Power system reliability Remote control Testing

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Stackelberg game-based optimal scheduling of integrated energy systems considering differences in heat demand across multi-functional areas

arXiv

引用

arXiv 2022年

作者： Wang, Limeng Yang, Ranran Qu, Yang Xu, Chengzhe Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education Northeast Electric Power University Jilin132012 China State Grid Nanyang Power Supply Company Nanyang473000 China State Grid Jilin Power Supply Company Changchun130000 China

Demand-side management is very critical in China's energy systems because of its high fossil energy consumption and low system energy efficiency. A building shape factor is introduced in describing the architectural characteristics of different functional areas, which are combined with the characteristics of the energy consumed by users to investigate the features of heating load in different functional areas. A Stackelberg game-based optimal scheduling model is proposed for electro-thermal integrated energy systems, which seeks to maximize the revenue of integrated energy operator (IEO) and minimize the cost of users. Here, IEO and users are the Stackelberg game leader and followers, respectively. The leader uses real-time energy prices to guide loads to participate in demand response, while the followers make energy plans based on price feedback. Using the Karush-Kuhn-Tucker (KKT) condition and the big-M method, the model is transformed into a mixed-integer quadratic programming (MIQP) problem, which is solved by using MATLAB and CPLEX software. The results demonstrate that the proposal manages to balance the interests of IEO and users. Furthermore, the heating loads of public and residential areas can be managed separately based on the differences in energy consumption and building shape characteristics, thereby improving the system operational flexibility and promoting renewable energy consumption. © 2022, CC BY-NC-ND.

关键词： MATLAB

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Tracking Air Pollution in China: Near Real-Time PM2.5 Retrievals from Multiple Data Sources

arXiv

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arXiv 2021年

作者： Geng, Guannan Xiao, Qingyang Liu, Shigan Liu, Xiaodong Cheng, Jing Zheng, Yixuan Tong, Dan Zheng, Bo Peng, Yiran Huang, Xiaomeng He, Kebin Zhang, Qiang State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing100084 China Ministry of Education Key Laboratory for Earth System Modelling Department of Earth System Science Tsinghua University Beijing100084 China Center of Air Quality Simulation and System Analysis Chinese Academy of Environmental Planning Beijing100012 China Institute of Environment and Ecology Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen518055 China

Air pollution has altered the Earth’s radiation balance, disturbed the ecosystem and increased human morbidity and mortality. Accordingly, a full-coverage high-resolution air pollutant dataset with timely updates and historical long-term records is essential to support both research and environmental management. Here, for the first time, we develop a near real-time air pollutant database known as Tracking Air Pollution in China (TAP, http://***/) that combines information from multiple data sources, including ground measurements, satellite retrievals, dynamically updated emission inventories, operational chemical transport model simulations and other ancillary data. Daily full-coverage PM2.5 data at a spatial resolution of 10 km is our first near real-time product. The TAP PM2.5 is estimated based on a two-stage machine learning model coupled with the synthetic minority oversampling technique and a tree-based gap-filling method. Our model has an averaged out-of-bag cross-validation R2 of 0.83 for different years, which is comparable to those of other studies, but improves its performance at high pollution levels and fills the gaps in missing AOD on daily scale. The full coverage and near real-time updates of the daily PM2.5 data allow us to track the day-to-day variations in PM2.5 concentrations over China in a timely manner. The long-term records of PM2.5 data since 2000 will also support policy assessments and health impact studies. The TAP PM2.5 data are publicly available through our website for sharing with the research and policy communities. © 2021, CC BY.

关键词： Air pollution

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Advanced Out-of-Step Splitting Protection simulation Platform with Considering High Frequency Generation Tripping and Low Frequency Load Shedding

Advanced Out-of-Step Splitting Protection Simulation Platfor...

引用

Power systems and Electrical Technology (PSET), IEEE International Conference on

作者： Ren Liu Yukun Zhu Yihua Zhu Dongxu Chang Mingkang Wu Libin Huang State Key Laboratory of HVDC Electric Power Research Institute China Southern Power Grid Guangzhou China National Energy Power Grid Technology R&D Centre Electric Power Research Institute China Southern Power Grid Guangzhou China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Electric Power Research Institute China Southern Power Grid Guangzhou China CSG Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou China

This paper presents an advanced out-of-step (OOS) splitting protection simulation platform considering high frequency generation tripping and low frequency load shedding. In the proposed simulation platform, Real-Time Digital Simulator (RTDS) is utilized as the real-time power system simulator. Through the high-speed I/O card, real industry OOS splitting protection device is integrated into the proposed simulation platform. Based on the real China South Power Grid (CSG) control strategy, high frequency generation tripping and low frequency load shedding components are modelled in the simulation. CSG real grid is modelled in the RTDS to perform the Real-time hardware-in-the-loop simulation. simulation results present that there is a clear difference between with high frequency generation tripping results and without high frequency generation tripping results.

关键词： Performance evaluation Industries Hardware-in-the-loop simulation Load shedding Real-time systems Power grids High frequency

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A comprehensive intention prediction method considering vehicle interaction 4

A comprehensive intention prediction method considering vehi...

引用

4th CAA International Conference on Vehicular control and Intelligence, CVCI 2020

作者： Cai, Wenqi He, Ganglei Hu, Jianlong Zhao, Haiyan Wang, Yuhai Gao, Bingzhao Qingdao Legee Transmission System Technology Co. Ltd Qingdao China State Key Laboratory of Automotive Simulation and Control Jilin University Changchun China Qingdao Automotive Research Institute Jilin University Qingdao China

ISBN: (纸本)9781728184968

In this paper, an interactive intention prediction method is proposed. Firstly, the Hidden Markov Model integrated with Gaussian Mixture Model is modeled for current behavior recognition and its parameters are trained through NGSIM dataset. Then, a trajectory prediction method based on Frenet frame is used to predict the future traffic situation, considering which future behavior reasoning is realized by maximum expected utility theory. The final intention prediction result is a combination of historical trajectory recognition and future behavior reasoning. The simulation results show that the proposed method has the ability of reasonably reflecting the interaction process between vehicles and the prediction performance is good. © 2020 IEEE.

关键词： Hidden Markov models

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A high-precision Analytical Method for Fast Calculation of Motor Vibration Based on Tooth Modeling

A high-precision Analytical Method for Fast Calculation of M...

引用

International Conference on Electrical Machines, ICEM

作者： J. F. Hong S. M. Wang Y. G. Sun H. X. Cao State Key Laboratory of Control and Simulation of Power System and Generation Equipment Tsinghua University Beijing China

ISBN: (数字)9781728199450

ISBN: (纸本)9781728199467

The analytical methods are widely used to predict the vibration and noise of the permanent magnet motors in industry applications. In the traditional analytical method, the influence of the teeth is ignored and a large error of vibration calculation will occur in the slotted motor. In this paper, a high-precision analytical calculation method for electromagnetic vibration of motors based on tooth modeling is proposed. First, the electromagnetic excitation force on each tooth of stator is calculated in the electromagnetic field. Then, the transfer function from the force acting on the teeth to the vibration on the surface of the shell is derived. Next, when the force is applied to a single tooth, the vibration on the surface of the motor can be obtained, and the superposition method is used to superimpose the vibration excited by the force of all teeth to calculate the total vibration acceleration of the motor surface. Finally, the finite element method and experimental method are conducted to verify the effectiveness of the proposed method.

关键词： Vibrations Force Stators Permanent magnet motors Electromagnetics Electromagnetic forces Analytical models

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Optimization control Strategy of Pumped Storage Power Station Considering Cost Allocation

Optimization Control Strategy of Pumped Storage Power Statio...

引用

International Conference on Power system Technology (POWERCON)

作者： Jun Yan Qinglong Song Qi Guo Lijian Xin Fancheng Meng Shuo Yu Jiaxu Zhou Cuiping Li Junhui Li Inner Mongolia Power (Group) Co. Ltd. Hohhot China Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education Northeast Electric Power University Jilin China Power Dispatching and Control Branch Inner Mongolia Power (Group) Co. Ltd. Hohhot China Inner Mongolia Electric Power (Group) Co. Ltd. Inner Mongolia Electric Power Research Institute Branch Hohhot China

Against the backdrop of the increasing proportion of new energy generation, pumped storage, as the main energy storage method, face problems of low utilization and poor economic benefits. To improve the enthusiasm and overall efficiency of pumped storage power stations, this article proposes an optimized control strategy for pumped storage power stations that takes into account cost sharing. This strategy combines the PSS allocation system operation rules and control strategies to improve the utilization of PSS capacity by expanding its application scenario range, and to increase its enthusiasm for extraction by increasing rental income; This article takes a regional power grid in northwest China as an example for analysis, and the results show that the proposed strategy can effectively improve the utilization level and economic benefits of PSS.

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An Adaptive Restart Method for DC Transmission Line in LCC-HVDC system 8

An Adaptive Restart Method for DC Transmission Line in LCC-H...

引用

8th IEEE International Conference on Advanced Power system Automation and Protection, APAP 2019

作者： Cai, Jing Dong, Xinzhou Tsinghua University State Key Laboratory of Control and Simulation of Power System and Generation Equipment Beijing China

ISBN: (纸本)9781728117225

DC-line fault recovery sequence (DFRS) is widely implemented in LCC-HVDC system to realize fast recovery in case of temporary fault. When permanent fault occurs, restart still happens several times as preset, resulting in repeated impacts and reducing the stability and reliability of the system. An adaptive restart for DC line fault is studied in this paper to deal with this problem. Firstly, the converter valves states and DC voltage characteristics under temporary fault and permanent fault are analyzed respectively. Then, a method based on DC voltage control is proposed to distinguish different fault states. Current DFRS strategy is improved by adding this process, through which the fault pole will only restart after the temporary fault disappearing, while directly blocked when a permanent fault is recognized. Fault handling time can be shortened and negative effects of DC line fault are minimized. The simulation results verify feasibility and effectiveness of proposed method. © 2019 IEEE.

关键词： HVDC power transmission

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Research on Lithium-ion Battery Safety Risk Assessment Based on Measured Information

Research on Lithium-ion Battery Safety Risk Assessment Based...

引用

2020 IEEE Sustainable Power and Energy Conference, iSPEC 2020

作者： Zhou, Xuyan Cheng, Lin Wan, Yuxiang Qi, Ning Tian, Liting You, Feng State Key Laboratory of Control and Simulation of Power Systems and Generation Equipments Tsinghua University Beijing China Energy Storage System Business Unite Tianjin Lishen Battery Joint-Stock Co. Ltd. Tianjin China

ISBN: (纸本)9781728191645

Lithium-ion batteries have the advantages of high energy density, fast power response, recyclability, and convenient to movement, which are unsurpassed by other energy storage systems. However, safety issues such as thermal runaway of lithium-ion batteries have become the main bottlenecks restricting the development of their extensive applications. In practical applications, the demand for battery energy storage scale and specific energy continues to increase, and the contradiction between battery high safety and battery safety has become increasingly prominent. This paper proposes a lithium-ion battery safety risk assessment method based on online information. Effective predictions are essiential to avoid irreversible damage to the battery and ensure the safe operation of the battery energy storage system before a failure occurs. This paper is expected to provide novel risk assessment method and research idea for the development and design of high-safety battery systems. © 2020 IEEE.

关键词： Lithium-ion batteries

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Traveling waves based fault line selection using sparse representation 8

Traveling waves based fault line selection using sparse repr...

引用

8th IEEE International Conference on Advanced Power system Automation and Protection, APAP 2019

作者： Xu, Wen Shi, Shenxing Dong, Xinzhou Zhang, Guangmei Tsinghua University State Key Laboratory of Control and Simulation of Power System and Generation Equipment Beijing China

ISBN: (纸本)9781728117225

Traveling wave method has been proved to be effective in fault line selection of power distribution system with the neutral non-effectively grounded. However, it can be easily disturbed by non-faulty traveling wave when selecting the line. For this reason, this paper proposes a new traveling wave line selection method based on sparse representation, in which current traveling wave signals are measured for the selection task. The algorithm of selection is based on the idea that all non-zero terms in the sparse coefficients of the measured signal are found to be associated with training samples from a single class, and the test samples can be easily assigned to the class. This makes it possible to distinguish between the non-faulty traveling wave and the real fault traveling wave. © 2019 IEEE.

关键词： compressed sensing distribution system line selection sparse representation traveling wave

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