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2019 IEEE PES Innovative smart grid Technologies Asia, ISGT 2019

作者： Gu, Xuenan Xu, Xi Yu, Zhipeng Huang, Sujuan Lu, Bin NARI Group Corporation State Grid Electric Power Research Institute Nanjing China State Key Laboratory of Smart Protection and Control China Southeast University Nanjing China

ISBN: (纸本)9781728135205

With the increasing penetration of distributed energy resources in distribution network, it is necessary to strengthen the research on optimal power flow control of intelligent distribution network. Aiming at the characteristics of distributed energy resources decentralized access in intelligent distribution network, a zonal collaborative control structure of intelligent distribution network based on multi-agent system (MAS) theory is designed. An optimal power flow model of the intelligent distribution network is established, which aims at minimizing the cost of power consumers, voltage deviation and power losses. The intelligent single particle algorithm is used to optimize power flow in the intelligent distribution network. The distribution system of the intelligent distribution network laboratory is analyzed to verify the effectiveness of the model and the algorithm. © 2019 IEEE.

关键词： Multi agent systems

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Influence of Generator-tripping Time on Transient Stability

Influence of Generator-tripping Time on Transient Stability

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2019 IEEE PES Innovative smart grid Technologies Asia, ISGT 2019

作者： Xue, Yusheng Zhu, Xueqiong Li, Ze NARI Group Corporation State Grid Electric Power Research Institute China State Key Laboratory of Smart Grid Protection and Control Nanjing China School of Electrical Engineering Southeast University Nanjing China

ISBN: (纸本)9781728135205

Study the influence of generator-tripping time on transient stability is of great significance for guiding the setting of the optimal generator-tripping time. Based on the extended equal area criterion (EEAC), the paper points out that the generator-tripping operation affects transient power angle stability margin of the system by changing the equivalent electromagnetic power, the equivalent mapping rotor angle and its corresponding energy accumulation interval, and clarifies accordingly the paths of generator-tripping time affects transient power angle stability margin. For the first swing of angle instability of the Hamiltonian system, the complex influences of generator-tripping time on the control effect are revealed. As generator-tripping time increases, the transient power angle stability margin may present an evolution situation that first increases and then decreases, and reaches a maximum value when generator-tripping time equals to the fault clearing time, and may also present decreases monotonically. The analysis conclusions are verified by simulation experiments. © 2019 IEEE.

关键词： Transients

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Research on the Structure Optimization of grid Frame Based on Generalized Slow Coherency Clustering

Research on the Structure Optimization of Grid Frame Based o...

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2019 IEEE PES Innovative smart grid Technologies Asia, ISGT 2019

作者： Weiqiang, Liang Fei, Tang Mengqi, Qing Chufei, Xiao Wen, Jian Mengjiao, Qing Jiale, Liu Feifei, Wang Fusuo, Liu School of Electrical Engineering and Automation Wuhan University Wuhan China State Key Laboratory of Smart Grid Protection and Control NARI Group Corporation Nanjing211006 China

ISBN: (纸本)9781728135205

Considering that the existence of fuzzy nodes will increase the difficulty of clustering when the system splitting occurs, a method is proposed to change the network topology, reduce the number of fuzzy nodes, and optimize the system operation. Firstly, we can obtain the modal matrix of all system nodes based on the generalized eigenvalue analysis. Secondly, Gauss elimination with pivoting is used to construct the slow coherence correlation matrix. Thirdly, the optimal scheme is obtained by continuously modifying the grid structure. It can reduce the number of fuzzy nodes, which is more convenient to maintain the stable operation of the system. Finally, the simulation results of IEEE-118 system show that the proposed method is reasonable and effective. © 2019 IEEE.

关键词： Network topology

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Rule Extraction-based Data Augmentation Method for Transient Instability Identification of Power Systems Using Machine Learning

Rule Extraction-based Data Augmentation Method for Transient...

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2019 IEEE Sustainable Power and Energy Conference, iSPEC 2019

作者： Zhou, Yanzhen Guo, Jian Guo, Qinglai Sun, Hongbin Lu, Yaohua Xu, Xiongfeng Tsinghua University Department of Electrical Engineering Beijing China Power Research Institute Nari Group Corporation State Grid Electric Jiangsu China State Key Laboratory of Smart Grid Protection and Control Jiangsu China

ISBN: (纸本)9781728149301

Machine learning methods have become a promising method for rapid identification of transient stability and unstable generators of power systems. However, the transient unstable instances are always fewer than stable instances, which brings difficulties of transient instability identification. This paper presents a data augmentation approach to increase the number of unstable instances. Firstly, original data will be generated by time domain simulation considering the randomness and limitations of power systems. Then, the patient rule induction space (Prism) method is used to obtain the unstable rule set from the training data. After that, new instances can be generated by the unstable rules and time domain simulation. Then, the machine learning method is used to generate the transient stability prediction model and unstable generator identification model based these two kinds of instances. All the generated instances can be verified by time domain simulation. Comprehensive studies are conducted on the New England 10-machine 39-bus system to verify the effectiveness of the proposed approach. © 2019 IEEE.

关键词： Transients

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Frequency Model of Generator Considering Thermal Constraint and AGC Regulation

Frequency Model of Generator Considering Thermal Constraint ...

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IEEE General Meeting Power& Energy Society

作者： Qian Chen Na Qiu Xin Shan Yuqing Jin Lixia Sun Yiping Yu Chuan Qin College of Energy and Electrical Energy Hohai University Nanjing China NARI Group Corporation (State Grid Electric Power Research Institute) Nanjing China State Key Laboratory of Smart Grid Protection and Control Nanjing China

ISBN: (数字)9781728155081

ISBN: (纸本)9781728155098

In this paper, a novel equivalent model considering the thermal constraint and AGC regulation is proposed for analyzing the frequency of thermal units. The UHVDC converter station blocking is very sensitive to frequency fluctuations in a bulk power system, so an accurate and easy-to-use model is much desired for the operation decision and control design. Firstly, actual output characteristics of the thermal unit are presented. Secondly, the structure of an equivalent frequency model is put forward to describe these characteristics. Thirdly, the scheme of estimating model parameters is offered to ensure to make the responses fit with the measured data. Fourthly, CEPRI-36 system is adopted to verify the proposed model. Finally, simulation precise is manifested by an actual case in East China Power grid. The proposed model shows significant advantages on high accuracy and clear mechanism. In addition, the main feature of governor and generator is reserved, which is sufficient for analyzing the impacts of system disturbances on the frequency. Considering the increasing installation of UHVDC in power systems, this novel model is extremely beneficial to situational awareness and control decision in operation rooms.

关键词： Automatic generation control Generators Regulation Power grids Data models Thermal analysis Safety

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Testing of Ethernet Function of Domestically-made FPGA Chip and Acquisition Board for the Application of Protective Relaying

Testing of Ethernet Function of Domestically-made FPGA Chip ...

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2021 International Conference on Power System Technology, POWERCON 2021

作者： Wang, Bin He, Xiaocai Jiang, Yingjie Lv, Xinquan Zhou, Zhimei Feng, Chen Dong, Xinzhou Tsinghua University Key Laboratory of Control and Simulation of Power Systems and Generation Equipment Department of Electric Engineering Beijing China Communication Transmission Center Information Telecommunications Company State Grid Shandong Electeic Power Company Jinan China Chip Design Center Beijing Smartchip Microelectronics Technology CO. Ltd Beijing China Smart Shine Microelectronics Technology CO. Ltd Chip Product Department Beijing China

ISBN: (纸本)9781665407373

In order to solve the problem that the core chips of domestic protective relaying devices generally rely on foreign imported chips and realize the localized replacement of FPGAs, this paper designs the verification peripheral circuits of domestic FPGA chip through the analysis of the structure and test schemes design of domestic FPGA, including board-level verification scheme and data flow control verification scheme. The communication test and random test are carried out to the IP core of domestic FPGA MAC controller. From the test results, it can be seen that the loopback data and the transmitted data in the descriptor are consistent, and the tested domestic FPGA can be competent for its role in the application of protective relaying. © 2021 IEEE.

关键词： Field programmable gate arrays (FPGA)

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Design and implementation of lightweight manmachine terminal screen interactive client 4

Design and implementation of lightweight manmachine terminal...

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4th IEEE Conference on Energy Internet and Energy System Integration, EI2 2020

作者： Lv, Zhimeng Que, Lingyan Fang, Caishen Wang, Xingzhi He, Yuan Huang, Kun NARI Group Corporation State Grid Electric Power Research Institute NARI Technology Co. Ltd. Nanjing China State Grid Zhejiang Electric Power Co. Ltd. No.8 of Huanglong Road Xihu District Hangzhou China East-China Branch of State Grid Co. Ltd. No. 201 Nanjing East Road Huangpu District Shanghai China NARI Group Corporation State Grid Electric Power Research Institute National Key Laboratory of Smart Grid Protection and Operation Control NARI Technology Co. Ltd. Nanjing China

ISBN: (纸本)9781728196060

According to the characteristics of the 'physical distribution and logical integration' of the new generation dispatching automation system, this paper designs a lightweight human-machine terminal display architecture. It also proposes the componentization of the screen and its rendering technology to realize the display of electrical primitives, chart primitives, and non-viewable primitives on lightweight man-machine terminals. Besides, this paper proposes the GIS visual display technology to meet the needs of geographic information display in the dispatch automation system and put forward the interaction technology of picture linkage to improve the interaction flexibility of picture components. Relevant research results have developed prototype system and applied in the field pilot. © 2020 IEEE.

关键词： Automation

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Research on Coordinated control of Photovoltaic System Based on VSC-HVDC

Research on Coordinated Control of Photovoltaic System Based...

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Power and Electrical Engineering (ACPEE), 5th Asia Conference on

作者： Di Wu Tonghua Wu Xindong Li Hongbin Wu Anhui Provincial Laboratory of Renewable Energy Utilization and Energy Saving Hefei University of Technology Hefei China State Key Laboratory of Smart Grid Protection and Control NARI Group Corporation Nanjing China

ISBN: (数字)9781728152813

ISBN: (纸本)9781728152820

The combination of photovoltaic (PV) power generation and voltage source converter-based high voltage direct current (VSC-HVDC) system is one of the development directions of new energy power generation and its power transmission in the future. Power grid failure or maintenance will lead to power outage. In order to reduce the economic loss caused by this, the PV-VSC-HVDC coordinated control system is used to continuously supply power to loads in island state to maintain its normal operation. By analyzing the mechanism and cause of the islanding effect, a coordinated control strategy suitable to PV-VSC-HVDC system is proposed. Finally, a PV-VSC-HVDC grid-connected system was built based on Matlab/Simulink, and a detailed simulation analysis of the operating characteristics of the system is made. The simulation results show that this control strategy can realize the smooth switch from grid-connected state to island state, ensuring the stable operation of the loads and reducing the economic loss caused by power failure.

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Internal Reuse of Methanol-to-Olefin Wastewater Based on Micro-Channel Separation Coupling Hydrocyclone Regeneration

SSRN

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SSRN 2023年

作者： Liu, Bing Ma, Hongpeng Huang, Qizhong Chen, Jianqi Huang, Yuan Huang, Haitao Wei, Qi Wang, Hualin Li, Jianping Lv, Wenjie National Engineering Laboratory for Industrial Wastewater Treatment East China University of Science and Technology Shanghai200237 China State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process East China University of Science and Technology Shanghai200237 China Key Laboratory of Special Functional and Smart Polymer Materials Ministry of Industry and Information Technology Northwestern Polytechnical University Xi’an710072 China China Energy Group Yulin Chemical Co. Ltd. Yulin719300 China Institution of Environmental Pollution and Health Shanghai University Shanghai200444 China School of Carbon Neutrality Future Technology China

Methanol-to-olefin (MTO) is a typical example of the new coal chemical industry. Due to the large volume of generated wastewater, complex composition, and heavy environmental hazard, wastewater recycling is critical for sustainable industrial development and ecological protection. Herein, a swirl regenerating micro-channel separation (SRMS) technology integrating deep filtration and hydrocyclone-enhanced regeneration was proposed. A small-scale experimental investigation was first conducted to verify the feasibility of the MTO wastewater treatment. A pilot SRMS device with a treatment capacity of 20 m3/h was constructed, and the continuous operation effect and stability of the device were comprehensively evaluated. The separation performance of the SRMS device at different solution pH values and the effect of the hydrocyclone-enhanced regeneration of separation media were discussed in detail. At low solution pH values ( © 2023, The Authors. All rights reserved.

关键词： Chemical industry

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Study on 24h Dynamic Reactive Power Optimization Considering Safety Operation Limit of Generators

Study on 24h Dynamic Reactive Power Optimization Considering...

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2019 IEEE PES Innovative smart grid Technologies Asia, ISGT 2019

作者： Lu, Bin Xu, Xi Yu, Zhipeng Wang, Wen Gu, Xuenan NARI Group Corporation State Grid Electric Power Research Institute China NARI Technology Co. Ltd. China State Key Laboratory of Smart Grid Protection and Control China Southeast University Nanjing China

ISBN: (纸本)9781728135205

In order to solve the practical problem of 24-hours dynamic reactive power optimization in power system dispatching, according to the limit output range of generator's operation, this paper divides generator's operation into three regions in PQ mathematical model and takes the action times of discrete control equipment as global inequality constraints, finally establishes a complete 24-hours non-linear mixed integer dynamic reactive power optimization mathematical model. The simulation results show that the mathematical model in this paper can adjust the output of the generators according to the actual situation effectively when the generators are in phase-leading operation. In addition, dynamic reactive power optimization reduces the number of control equipment's action at the cost of increasing active power loss in the whole network. So, In order to ensure the safe and economic operation of power grid, it is necessary to coordinate the relationship between active power loss and the constraints of control equipment's action. This paper has positive reference significance for power system dispatching. © 2019 IEEE.

关键词： Electric power transmission networks

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