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

作者： Chunlei Xu Tong Liu Baolong Lei Hui Peng State Grid Jiangsu Electric Power Co. Ltd. Nanjing China NARI Technology Co. Ltd. Xi’an China NARI Technology Co. Ltd. Nanjing China State Key Laboratory of Smart Grid Protection and Control NARI Group Corporation (State Grid Electric Power Research Institute) NARI Technology Co. Ltd. Nanjing China

ISBN: (数字)9781728196060

ISBN: (纸本)9781728196077

In the integrated operation mode of the smart grid dispatching and control system, there is a large amount of real-time data such as important alarms and manual operations that need to be shared between systems. How to synchronize these real-time data across systems with high reliability and performance becomes a problem to be solved. This paper studies the application scenarios of cross-system message synchronization and proposes a scheme based on redundant dual networks, including hardware and software architecture. The key technologies and important functions were implemented, reliability and throughput verifications were performed, and the expected results were achieved.

关键词： control systems Throughput Dispatching Real-time systems smart grids Software reliability Synchronization

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Design of A Game Theory Based Defense System for Power System Cyber Security

Design of A Game Theory Based Defense System for Power Syste...

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IEEE International Conference on Cyber Technology in Automation, control, and Intelligent Systems

作者： Ming Ni Anurag K. Srivastava Rui Bo Jie Yan NARI Technology Inc. State Key Lab of Smart Grid Protection and Control Nanjing 211106 China Washington State University Pullman WA 99164 USA Midcontinent Independent System Operator Minneapolis 55221 USA

ISBN: (纸本)9781538604915

With numerous information and communication devices deployed in smart grid, cyber security becomes a big challenge faced by all power companies around the globe. This paper first introduces possible cyber-attacks that the observation system and control system in smart grid may face, and then presents examples to illustrate the impact of such attacks. Following that, a cyber security intelligent defense system is proposed which will equip system operators a powerful tool to actively fight hackers and keep the power system secure and stable. The frame work and the implementation methodologies of this defense system are also presented.

关键词： state estimation control systems Power system stability Power measurement Power grids Computer viruses Computer viruses Power grids control systems Power measurement Defense systems Power system stability Network security state estimation Game theory observation system smart grids power systems frame work electricity company

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Evaluation of Wind Power Acceptance Capacity Based on N-1 Static Voltage Stability Region

SSRN

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SSRN 2024年

作者： Shu, Hongchun He, Yefu Wang, Guangxue Shi, Botao Zhang, Hanxin Zaho, Zhixin State Key Laboratory Collaborative Innovation Center for Smart Grid Fault Detection Protection and Control Jointly Kunming University of Science and Technology Kunming China Yunnan Key Laboratory of Green Energy and Digital Power Measurement Control and Protection Faculty of Land Resource Engineering Kunming University of Science and Technology China

Wind power generation is random and volatile with significant seasonal characteristics. Large-scale grid-connected wind power has an impact on the static safety of the system, especially under N-1 fault conditions. Therefore, this paper proposes an evaluation method of wind power acceptance capacity based on N-1 static voltage stability region to assess the maximum wind power acceptance capacity of the system. To accurately describe the dynamic correlation and seasonal characteristics of wind power generation in adjacent wind farms, a wind power output model is established based on k-medoids clustering and dynamic Copula function. Then, the seasonal generated scene data replaces the original wind power data for acceptance capacity assessment. The N-1 static voltage stability region model for wind power access is established, and the characterization method of wind power access to the N-1 static voltage stability region is determined by targeting search, searching, and selecting the most serious N-1 state. Monte Carlo is utilized to simulate the mathematical model of wind power acceptance capacity evaluation under different seasons, and combined with the N-1 static voltage stability domain, the maximum wind power acceptance capacity curve of the system is obtained. To verify the effectiveness of the proposed method, the IEEE-30 system connected to wind power is taken as an example for simulation analysis. The results show that the proposed method can quickly evaluate the maximum wind power acceptance capacity in the N-1 state, providing a basis for the planning and operation of a new energy power system with practical significance. © 2024, The Authors. All rights reserved.

关键词： Power generation

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Design of A Game Theory Based Defense System for Power System Cyber Security

Design of A Game Theory Based Defense System for Power Syste...

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“紫金论电”2017智能电网保护和运行控制国际学术研讨会

作者： Ming Ni Rui Bo Jie Yan Anurag K Srivastava NARI Technology Inc. State Key Lab of Smart Grid Protection and ControlNanjing211106China Midcontinent Independent System Operator Minneapolis55221USA Washington State University PullmanWA99164USA

With numerous information and communication devices deployed in smart grid,cyber security becomes a big challenge faced by all power companies around the *** paper first introduces possible cyber-attacks that the observation system and control system in smart grid may face,and then presents examples to illustrate the impact of such *** that,a cyber security intelligent defense system is proposed which will equip system operators a powerful tool to actively fight hackers and keep the power system secure and *** frame work and the implementation methodologies of this defense system are also presented.

关键词： cyber security security defense system Stackelberg Competition Stochastic Game Game Theory

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Research on Identification Method of Transformer Based on Improved Hu Invariant Moments

Research on Identification Method of Transformer Based on Im...

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International Conference on Mechatronics and Intelligent Robotics, ICMIR 2017

作者： Yu, Hua-dong Ou, Qing-hai Wu, Qing Zhang, Zhe Li, Wen-jing Wang, Yubo Liu, Guohua Lu, Yongling Hu, Chengbo Liu, Na Wang, Rong State Grid Information and Telecommunication Group Co. Ltd. Beijing China State Grid Key Laboratory of Power Industrial Chip Design and Analysis Technology Beijing Smart-Chip Microelectronics Technology Co. Ltd. Beijing100192 China Beijing Engineering Research Center of High-Reliability IC with Power Industrial Grade Beijing Smart-Chip Microelectronics Technology Co. Ltd. Beijing100192 China State Grid Jiangsu Electric Power Company Research Institute Nanjing21110 China Control and Computer Engineering College North China Electric Power University NCEPU Beijing China

ISBN: (纸本)9783319709895

With the rapid development of electric power industry and the expansion of power grid scale, more and more attentions have been paid to the safe operation of electrical equipment. The target recognition method we used now couldn’t recognize power transformer well, which is based on gray information. In this paper, a transformer identification algorithm based on improved Hu moment invariants is proposed. The transformer identification algorithm proposed in this paper has the advantages of good recognition effect and high recognition accuracy. The correctness and feasibility of the proposed algorithm have been verified by experiments. © 2018, Springer International Publishing AG.

关键词： Template matching

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Short-Term Power Forecasting for Wind Power Generation Under Extreme Weather Conditions

Short-Term Power Forecasting for Wind Power Generation Under...

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IEEE/IAS Industrial and Commercial Power System Asia (I&CPS Asia)

作者： Yuexin Song Yizhi Chen Chenghong Tang Wei Wang Hao Xiao Wei Pei Yanhong Yang Grid Technology Research Group Institute of Electrical Engineering Chinese Academy of Sciences Beijing China State Key Laboratory of Smart Grid Protection and Control NARI Technology Co. Ltd NARI Group Corporation (State Grid Electric Power Research Institute) Nanjing China Chinese Academy of Sciences Institute of Electrical Engineering Beijing China

Extreme weather poses a great challenge to the safe operation of wind power and new power systems dominated by wind power. Providing accurate wind power prediction will be an effective response. For this reason, this paper proposed a short-term power forecasting for wind power generation under extreme weather conditions. Firstly, the relationship between wind speed and wind turbine output power is analyzed and a wind power generation model is established. Then, the Long Short-Term Memory Neural Network (LSTM) is applied to construct a short-term power prediction model for wind turbines, and establishes three models for wind turbine decommissioning under extreme weather. Moreover, the climbing control strategy of wind turbine is also investigated to guarantee the system safety, stability and operation economy. Finally, the numerical analysis is carried out on the wind farm consists of 28 wind turbines, the results verify the effectiveness and superiority of the proposed method.

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Organizational Description System for Digital Twin of Distribution Network Equipment Based on Object-oriented Equipment Model

Organizational Description System for Digital Twin of Distri...

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Power System and Green Energy Conference (PSGEC)

作者： Jingru Zang Jin Xu keyou Wang Lin Peng Zhimin He Zhujian Ou Key Laboratory of Control of Power Transmission and Conversion Ministry of Education Shanghai Jiao Tong University Shanghai China State Grid Smart Grid Research Institute Co. Ltd Nanjing China State Grid Nantong Power Supply Company Nantong China

ISBN: (数字)9798350365573

ISBN: (纸本)9798350365580

Digital twin is a mathematical model of a physical object that can accept real-time data and evolve in real time. The fundamental technology underlying digital twin technology is modeling and simulation. For a distribution network with complex structure and numerous devices, the construction of digital twins is of great significance for equipment management and system analysis. This paper first introduces the object-oriented modeling method and presents an object-oriented equipment model (OEM). Subsequently, an organizational description system for digital twin of distribution network equipment based on object-oriented equipment model is designed, and the concrete implementation method is introduced. Finally, by comparing with the simulation results of PSCAD software, the accuracy of the electromagnetic transient (EMT) simulation program, one of the applications of the proposed system, is verified.

关键词： Object oriented modeling Simulation Distribution networks Production Real-time systems Mathematical models Spatial databases Software Scheduling Digital twins

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Modelling and control of doubly fed variable-speed pumped storage units for grid power regulation

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The Journal of Engineering 2017年第13期2017卷 745-750页

作者： Zhao Guopeng Zhao Qiang Ren Jiyun Song Xiaofang Han Minxiao State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 People's Republic of China School of Electrical and Electronic Engineering North China Electric Power University Beijing 102206 People's Republic of China State Key Laboratory of Smart Grid Protection and Control Nanjing 211006 Jiangsu Province People's Republic of China

With the expending scale of the power grid and the substantial development of renewable energy generation system, the demand for power quality is becoming more and more significant. The doubly fed pumped storage can be an effective method to control the power of the power grid and restrain the power grid fluctuation caused by renewable energy generation. First, this study introduces the structure of doubly fed pumped storage unit, and analyses the mathematical model of reversible hydraulic pump turbine, doubly fed induction generator (DFIG) and control strategy of the converter. On the basis of the model of reversible hydraulic pump turbine and DFIG, control strategies of the dq decoupling and synchronous rotating coordinate system are studied to output the active and reactive power. Second, the models of generating mode and pumping mode for the doubly fed pumped storage unit are established. Third, for the grid power regulation, active power and speed control strategy in generating mode, pumping mode are put forward. Finally, the model of doubly fed pumped storage unit of 300 MW is established in MATLAB/Simulink. The proposed control strategy is verified by the simulation results.

关键词： wind power plants machine control pumped-storage power stations velocity control asynchronous generators power generation control pumps power grids pumping mode doubly fed pumped storage unit grid power regulation active power speed control strategy renewable energy generation system power quality power grid fluctuation reversible hydraulic pump turbine output reactive powers

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Automatic Generation Method of Multi-Bays Graph In Power System based on Real-time Topological Model

Automatic Generation Method of Multi-Bays Graph In Power Sys...

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作者： Yuan Gao LianJie Chen Peng Si YunGuang Su CaiShen Fang Hua Xu Kun Huang NARI Group Corporation(State Grid Electric Power Research Institute) NARI Technology Co. Ltd. NARI Group Corporation(State Grid Electric Power Research Institute) NARI Technology Co. Ltd.State Key Laboratory of Smart Grid Protection and Control

Substation supervisory control is an essential part of power grid monitoring system. Besides the power flow between substations, the running states of the devices in substations are important to the staff in power grid. At present, the substation devices with their running states are drawn in electrical bay graphs, which are widely used in the power grid dispatching department. Traditional electrical bay graphs contain devices in only one substation and the drawing process of the graph relies on manual work. In this paper, an automatic generation method of multi-bay graph in power system based on real-time topological model is proposed. There are two stages in the method. In the first stage, necessary model information is obtained according to topology in real-time database. In the second stage, the bay features are firstly built in the method and the classification of the bays is achieved by these ***, a data structure of device tree is proposed and the automatic layout of devices is realized based on the data structure. Finally, automatic wiring of the devices is achieved from the perspective of aesthetic and objectivity. Experimental results show that the graph drawn by the proposed method could not only reflect the actual connection mode and running states of the substation devices but also show the power flow between these substations. The proposed drawing method could reduce manual operations and improve the work efficiency of the power grid staff.

关键词： Multi-Bays Graph Device Tree Automatic Layout Automatic Wiring

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control Strategy of DC-DC Converter With Diode Rectifier for All-DC Offshore Wind Farms

Control Strategy of DC-DC Converter With Diode Rectifier for...

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IEEE General Meeting Power& Energy Society

作者： Guanghui Zheng Botong Li Xiangping Kong Zijun Bin Yan Tao The Key Laboratory of Smart Grid of Ministry of Education Tianjin University Tianjin China Relay Protection Automation and Communication Technology Electric Power Research Institute State Grid Jiangsu Electric Power Co. Ltd. Nanjing China

ISBN: (数字)9798350381832

ISBN: (纸本)9798350381849

This paper investigates the control strategy of a DC-DC converter with modular multilevel converter (MMC) and diode rectifier (DR) face-to-face connection structure applied in all-DC offshore wind power system. To address the uncontrollability of the diode rectifier, this paper proposes a grid-forming control strategy based on the interdependencies among active power, reactive power, AC voltage amplitude, and frequency within this topology. The control objective is to enable the MMCs to establish a stable voltage and frequency for the AC system inside the DC-DC converter. Furthermore, the proposed control strategy also realizes the fast regulation of AC voltage and frequency during power fluctuations, contributing to the regular operation of the system under unstable conditions. Simulation results in PSCAD demonstrate the effectiveness of the proposed control strategy under startup and power fluctuation scenarios.

关键词： Reactive power Fluctuations Simulation Rectifiers DC-DC power converters Wind power generation Wind farms Frequency conversion Voltage control Frequency control

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