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Global Status Event-Based Iterative Co-Simulation Framework for Power and Communication

Global Status Event-Based Iterative Co-Simulation Framework ...

引用

IEEE Power and Energy Society General Meeting

作者： Heqin Tong Jianbo Luo Ming Ni Yuecen Li Yusheng Xue Yanhong Wei NARI Group Corporation NARI Technology Co. Ltd. State Key Laboratory of Smart Grid Protection and Control Nanjing China Sunshine Energy Property Management Group Inc. Xinyi China

ISBN: (纸本)9781538622131;9781538622124

Power system security and stability control is heavily dependent on the reliability of communication network. The communication interruption and latency may cause security and stability issues in power system. Thus, studying the dynamic procedure of the interaction between power system and communication network in fault situation becomes more and more important. In this paper, by analyzing the weakness of the existing co-simulation frameworks, a new co-simulation framework, Global Status Event-Based Iterative Co-simulation Framework, is proposed, in which a global event scheduler manages the communication simulator and power simulator, and power simulator will run iterative simulation as a new event is identified and added to the global event scheduler. Then, a co-simulation platform based on the proposed framework is introduced which integrates the power system simulator and communication network simulator. Finally, a case is studied and reveals the procedure of the cascading failures in both power system and communication network, which cannot be captured by the simulation of a single system.

关键词： Indexes Synchronization

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A Chip Data Security Transmission Method based on Command control Word Mode 2

A Chip Data Security Transmission Method based on Command Co...

引用

2nd IEEE International Conference on Information Systems and Computer Aided Education, ICISCAE 2019

作者： Jia, Liu Fu, Qingqin Ang, Zhengquan Zhang, Qian Yi, Ling Feng, Tingzheng Bai, Xuesong Shi, Yuejie Beijing Smart Chip Microelectronics Technology Company Limited Beijing Electric Power High Reliability Integrated Circuit Design Engineering Research Center Beijing China Beijing Aerospace Flight Control Center Beijing China Beijing Smart Chip Microelectronics Technology Company Limited State Grid Key Laboratory of Power Industrial Chip Design and Analysis Technology Beijing China

ISBN: (纸本)9781728130668

Aiming at the shortcomings of traditional security chip data transmission, a method of security chip data transmission based on command control word is proposed. The method divides the read command mode and write command mode of the security chip files into two kinds of representation methods. The read command and write command of the security chip files are transmitted by different data transmission methods. In the control word of read and write command mode of security chip files, the read and write commands of security chip files are transmitted in four ways: plaintext, ciphertext, plaintext + MAC and ciphertext + MAC. The properties of prohibit adding and updating are added to the writing command control word of security chip files. In the control word of read command and write command of security chip files, define the permissions that read command and write command operation need to satisfy. © 2019 IEEE.

关键词： Data communication systems

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Energy Storage Planning and Economic Dispatch of Microgrid Considering Power to Gas

Energy Storage Planning and Economic Dispatch of Microgrid C...

引用

IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)

作者： Jiaqi Gu Fei Mei Jixiang Lu Jinjun Lu Bo Yang College of Energy and Electrical Enginering Hohai University Nanjing China State Key Laboratory of Smart Grid Protection and Control NARI Group Corporation Nanjing China China Electric Power Research Institute Nanjing China

ISBN: (数字)9781728157481

ISBN: (纸本)9781728157498

New energy has been vigorously promoted for its advantages such as cleanliness, large reserves and renewability. Recently, power-to-gas (P2G) technology has provided a new idea for energy conversion, which helps to improve energy efficiency. In view of the current high penetration rate of photovoltaics, the impact of three measures with regard to energy conversion, energy storage configuration and demandside response on the economics of the microgrid and the optimal scheduling of the microgrid are explored. Firstly, a microgrid scheduling model with P2G device is built; Secondly, a bi-level planning model for the economic cost of the microgrid scheduling is presented. The upper layer will be based on absolutely accommodation of photovoltaics as the prerequisite to conFigure the optimal energy storage capacity; Then lower layer performs optimized scheduling under the upper model to ensure the economy of the microgrid. Finally, a comparison example is used to analyze the optimal energy storage capacity in different scenarios and an optimized scheduling scheme is given.

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A Frequency control Method that Allows Regulation Sharing among Interconnected control Areas 9

A Frequency Control Method that Allows Regulation Sharing am...

引用

9th Asia Conference on Power and Electrical Engineering, ACPEE 2024

作者： Wang, Lifeng Teng, Xiaobi Lin, Hua Song, Bingbing Qin, Kangping Li, Yutong Chen, Zijie Dispatch and Control Branch Center East China Branch of State Grid Corporation of China Shanghai China SPIC ShanDong Energy Marketing CO. LTD Jinan China Shanghai Jiao Tong University College of Smart Energy Shanghai China Ministry of Education Shanghai Jiao Tong University Key Laboratory of Control of Power Transmission and Conversion Shanghai China

ISBN: (纸本)9798350309638

Current large-scale interconnected power grids predominantly adopt the Tie-Line Bias control (TBC), where each control area is independently responsible for the power balance within its region. However, under this control mode, if a control area within the interconnected grid lacks sufficient frequency regulation capacity, the frequency of the entire interconnected grid can be affected. To allow sharing of frequency regulation capacity across multiple control areas, this article proposes a market scheme for inter-area frequency regulation capacity sharing, along with a supporting frequency control method for interconnected power grids. After meeting their own frequency regulation capacity requirements, control areas can contribute surplus capacity to a regional frequency regulation capacity market. The awarded capacity is then centrally dispatched by the regional grid, with each control area using the TBC mode and the regional grid employing the Flat Frequency control(FFC) mode. Simulation results indicate that, compared to the traditional TBC mode, our proposed scheme effectively improves the frequency quality of the interconnected grid and achieves optimized resource allocation. © 2024 IEEE.

关键词： Electric power system control

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Research on Secure Data Circulation and Sharing protection Technology Framework for Power Monitoring System

Research on Secure Data Circulation and Sharing Protection T...

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International Conference on Networking and Network Applications (NaNA)

作者： Weicong Huang Jieying Zhou Minghui Jin Zheng Han Sijia Wei State Grid Laboratory of Power cyber-Security Protection and Monitoring Technology State Grid Smart Grid Research Institute Co. LTD. Nanjing China National Power Dispatching and Control Center State Grid Corporation of China Beijing China State Grid Shanghai Municipal Electric Power Company Shanghai China

With the increasing frequency of data circulation and sharing in power monitoring systems, traditional network-centric protection strategies are insufficient to resist the growing risk of data leakage. This article analyzes the security risks in existing typical data circulation and sharing scenarios based on the demand for data security sharing in power monitoring systems. A data security protection technology framework covering the source layer, interaction layer, and terminal layer has been proposed from the perspectives of basic protection capabilities and key protection technologies, as well as an evaluation method for the protection technology capabilities of data circulation and sharing. This provides a reference idea for effectively enhancing the data circulation and sharing protection capabilities of power monitoring systems.

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Large generator rotor distortion sensing monitoring technology research

Large generator rotor distortion sensing monitoring technolo...

引用

Electrical Engineering and Automation (IFEEA), International Forum on

作者： Zhou Shaoliang Chen Li Shen Jian Sun Jianping State Key Laboratory of Smart Grid Protection and Control NARI Group Corporation (State Grid Electric Power Research Institute) Co. Ltd Nanjing China NARI Group Corporation (State Grid Electric Power Research Institute) Co. Ltd NARI Technology Corporation Co. Ltd Nanjing China

ISBN: (数字)9781728196275

ISBN: (纸本)9781728196282

In view of the shortage of direct measurement method for shafting of large generator sets, this paper proposes a sensor monitoring technology based on illumination emphasis. The article first introduces the research status of the shaft torque of thermal power units, and expounds the theory of mode interference and the theory of twist sensing. Then, the LP mode simulation of single-mode fiber and two-mode fiber is carried out, which is an effective method for symmetrical higher-order mode. Finally, the simulation of the mode interferometer, the spectrum and the phase during twisting is carried out. It is clarified that the non-circular symmetrical mode with π phase difference electric field distribution is the key inducement of the interferometric phase jump and spectrum flipping in twisting measurement. This article provides theoretical guidance for subsequent device fabrication and spectral distortion analysis.

关键词： Optical fiber sensors Optical interferometry Phase measurement Perturbation methods Optical distortion Distortion Optical fiber theory

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A Fast Blocking Method of Bus protection when CT Disconnected Based on Braking Current and Zero Sequence Current

A Fast Blocking Method of Bus Protection when CT Disconnecte...

引用

Sustainable Power and Energy Conference (iSPEC)

作者： Yincheng Wang Jie Zhu Wei Dai Xiang Zhu Xiaohong Wang Kaiyu Zhang NARI Technology Co. Ltd NARI Group Corporation Nanjing China Maintenance company of State Grid Tibet Electric Power Co. Ltd State Grid Tibet Electric Power Company Lhasa China State Key Laboratory of Smart Grid Protection and Control NARI Group Corporation Nanjing China

ISBN: (数字)9781728191645

ISBN: (纸本)9781728191652

Current transformer (CT) disconnection of bus is prone to maloperation of bus differential protection. The existing criteria for CT disconnection do not fully consider the distinction between heavy load high impedance fault and external metal fault transfer to internal high impedance fault. And not fully consider the influence of one-half wiring circulation and unbalanced impedance on CT disconnection zero sequence criterion. Based on the theoretical analysis of the characteristics of braking current variation and zero sequence current distribution in the event of internal fault, this paper puts forward a fast blocking criterion of CT disconnection based on braking current and zero sequence current, and carries out simulation verification. Both the theory and the simulation show that there is a drop of braking current in the event of internal fault. The distribution of zero sequence current in the event of CT disconnection is obviously different from that in the event of internal fault. The criterion proposed in this paper can effectively and reliably distinguish CT disconnection from internal fault.

关键词： Wiring Analytical models Current transformers Reliability theory Current distribution Impedance Load modeling

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An analytic method of calculating rotor and stator short-circuit current of DFIG with RSC control

An analytic method of calculating rotor and stator short-cir...

引用

IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)

作者： Jinhua Zhang Baohui Zhang Bingqing Wu Jin Wang Shaanxi Key Laboratory of Smart Grid Xi'an Jiaotong University Xi'an China Electric Power Dispatching and Control Center State Grid Shandong Electric Power Company Jinan China

ISBN: (纸本)9781509054190

To investigate the fault features of doubly-fed induction generator (DFIG) with rotor side converter (RSC) control, an analytic method of calculating the DFIG short-circuit current is proposed in this paper. Based on the space vector model of DFIG with RSC control, the dynamic equation of rotor current reflecting both the machine transient process and the impact of RSC control is derived, and analytic expressions of rotor and stator fault current in time-domain are obtained. The calculation result is certified by being compared with the PSCAD simulation result. According to the derived analytic expressions, the components of the DFIG short-circuit current are analyzed. It indicates that the machine terminal voltage dip of DFIG, the current reference value, the orientation angle, and the proportional-integral value of RSC controller are main factors influencing the short-circuit current characteristics.

关键词： Damping Indexes Power grids Frequency control Time-frequency analysis Stators

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A hybrid model based on convolutional neural network and long short-term memory for short-term load forecasting

A hybrid model based on convolutional neural network and lon...

引用

IEEE Power and Energy Society General Meeting

作者： Jixiang LU Zhihong YANG Qipei ZHANG Mengfu TU Technology Research Center NARI Group Corporation Nanjing China State Key Laboratory of Intelligent Power Grid Protection and Operation Control Nanjing China

To better mine the effective information contained in massive data and improve the accuracy of short-term load forecasting, this paper proposes a hybrid model based on convolutional neural network and long short-term memory network (CNN-LSTM) for short-term load forecasting (STLF), which takes massive historical load data, meteorological data, date information, and peak-valley electric price data as input by constructing continuous feature maps with time sliding window. Convolutional neural network (CNN) is used to extract features and reshape them into vectors. The feature vectors are constructed in temporal and fed into long short-term memory network (LSTM) which is used to predict STLF. To the best of our knowledge, this is the first work to predict STLF using deep learning in both spatial and temporal domains. It is shown that the forecasting accuracy can be notably improved by CNN-LSTM hybrid model method. The effectiveness of the proposed method is validated through extensive comparison studies on a real-world dataset.

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The propagation characteristics of electromagnetic wave generated from partial discharges in power transformer by FDTD simulation

The propagation characteristics of electromagnetic wave gene...

引用

2007 Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP

作者： Tang, Zhiguo Li, Chengrong Wang, Wei Wang, Hui Wang, Li Ding, Yansheng Beijing Key Laboratory of High Voltage and EMC Ministry of Education North China Electric Power University Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control Ministry of Education North China Electric Power University State Grid Corporation of China 100081 Beijing China Beijing Key Laboratory of High Voltage and EMC School of Electric and Electronic Engineering North China Electric Power University P.O. No.88 Beijing 102206 China

The radiation and propagation of electromagnetic (EM) waves generated from PD caused by the obstruction of main transformer components are studied by FDTD simulation in order to get more information for PD location and diagnosis. Current filament, perfect conductive cylinder and perfect conductive spiral coil models are used to simulate the radiation and the influences of iron-core and transformer coil to the propagation of EM *** results demonstrate dynamic propagation process of EM waves in time order, and prove the correctness of the shortest optical path principle. But the attenuation and distortion of EM waves-especially the first peak amplitude-caused by the obstruction of large solid conductive obstacle like iron-core are quite intensive that it may cause great difficulties to identify exact arriving time position of incident waves coming along the shortest optical path. While the influences of the coil to the propagation of EM waves are so little that HF EM waves can penetrate it in almost linear path. ©2007 IEEE.

关键词： Electromagnetic waves

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