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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： TAN Yong WANG Meng SHEN Jian ZHANG Min HOU Mingguo Nari Group Corporation(State Grid Electric Power Research Institute) Nanjing 21106China NARI Technology Development Co.Ltd Nanjing 211061China State Key Laboratory of Smart Grid Protection and Control Nanjing 210061China

With the rapid development of renewable energy power generations,AC/DC transmissions and static compensations etc,power electronic technology has been widely applied in power *** traditional power equipment is replaced by a large number of power electronic devices,the disturbances such as harmonic interference and sub-synchronous oscillation are more *** order to detect the sub synchronous oscillation in power system in time,and take measures to ensure the safety and stability of power system,this article analyses the algorithm principle of the PMU and the communication architecture of WAMS/PMU *** to the IEEE Std C37.118-2011 standard,it elaborates the problems and the limitations existing in the monitoring of sub-synchronous and super-synchronous harmonic parameters on *** the basis of the above,a method of on-line identification and alarm for the sub-synchronous and super-synchronous harmonic parameters on PMU device is *** with FFT spectrum correction theory,the high accuracy identification method of distributed sub synchronous and super synchronous harmonic parameter is *** feasibility and accuracy of the method is verified by simulation experiments.

关键词： sub-synchronous oscillation amplitude ratio method phasor measurement unit(PMU) FIR Filters

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

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

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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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Ultra-short-term wind speed forecasting method based on spatial and temporal correlation models

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The Journal of Engineering 2017年第13期2017卷 1071-1075页

作者： Zhou Haiqiang Xue Yusheng Guo Jizhu Chen Jiehui Energy and Electrical Engineering School Hohai University Nanjing 211100 Jiangsu Province People's Republic of China NARI Group Corporation (State Grid Electric Power Research Institute) Nanjing 211106 People's Republic of China State Key Laboratory of Smart Grid Protection and Control Nanjing 211106 People's Republic of China

An ultra-short-term wind speed forecasting method based on spatial and temporal correlation models is proposed. Firstly, the temporal correlation model was studied. The generalised distance of wind speed time series is defined based on the dynamic time warping distance and correlation coefficient. Samples with similar wind dynamic patterns are classed into the same group. Time series in one group are depicted with a representative time series which is modelled by an autoregressive moving average (ARMA) model. For time series which cannot be classed to any of these groups, a special group was defined. It was modelled by artificial neural network (ANN). Secondly, the spatial correlation between the target wind farm and the reference wind farm was investigated with the meteorological data taking into consideration. The grey prediction method is utilised to predict the wind speed. Finally, the combined ultra-short-term wind speed forecasting method is proposed. It takes into account the inherent time correlation of the target wind speed and its spatial correlation with reference wind farm. The wind speed prediction of wind farms in northwest USA verifies the effectiveness and feasibility of the proposed method.

关键词： wind neural nets time series grey systems autoregressive moving average processes wind power plants power engineering computing ultra-short-term wind speed forecasting method wind farms wind speed prediction target wind speed inherent time correlation ultra-short-term wind speed combination forecasting method corresponding spatial correlation model grey prediction method reference wind farm target wind farm ARMA model representative time series similar wind dynamic patterns sliding time window correlation coefficient dynamic time warping distance wind speed time series temporal correlation model temporal correlation models spatial correlation models

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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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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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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 and Application of Trans-Regional Cooperative Disposal of UHV Interconnected Power grid

Research and Application of Trans-Regional Cooperative Dispo...

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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： Shan Xin Li Jun Xu Xi Lu Jinjun NARI Group Corporation(State Grid Electric Power Research Institute) NanjingJiangsu Province211000China NARI Technology Co. Ltd.NanjingJiangsu Province211000China State Key Laboratory of Smart Gird Protection and Control NanjingJiangsu Province211000China

With the rapid construction of UHV AC/DC power grid,the integration characteristics of power grid are becoming more and more prominent,and real-time operation control of dispatching is significantly becoming more and more *** existing monitoring and control model based on the system model data cannot meet the requirements for the development of UHV power *** on the existing achievements of dispatching automation system,the general goal and framework of the trans-regional cooperative disposal of UHV interconnected power grid are put forward,and the key technologies are analyzed in four aspects: situation awareness,fault location,joint disposal and cooperative control to provide reference and example for follow-up construction for real-time control and support system for the dispatching of UHV power grid.

关键词： UHV situation awareness cooperative disposal source grid load wide area graphic browsing DC fault diagnosis

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High-accurate estimation method of sub-synchronous and super-synchronous harmonic parameters on PMU

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The Journal of Engineering 2017年第13期2017卷 1275-1279页

作者： Yong Tan Rong Chen Meng Wang Min Zhang Mingguo Hou Nari Group Corporation (State Grid Electric Power Research Institute) Nanjing 21106 People's Republic of China NARI Technology Development Co. Ltd Nanjing 211061 People's Republic of China State Key Laboratory of Smart Grid Protection and Control Nanjing 210061 People's Republic of China School of Rail Transportation Soochow University Suzhou 215131 People's Republic of China

With the rapid development of renewable energy power generations, AC/DC transmissions and static compensations etc., power electronic technology has been widely applied in power system. As traditional power equipment is replaced by a large number of power electronic devices, the disturbances such as harmonic interference and sub-synchronous oscillation are more frequently. In order to detect the sub-synchronous oscillation in power system in time, and take measures to ensure the safety and stability of power system, this article analyses the algorithm principle of the phasor measurement unit (PMU) and the communication architecture of wide area measurement system (WAMS)/PMU system. According to the IEEE Std C37.118-2011 standard, it elaborates the problems and the limitations existing in the monitoring of sub-synchronous and super-synchronous harmonic parameters on WAMS. On the basis of the above, a method of online identification and alarm for the sub-synchronous and super-synchronous harmonic parameters on PMU device is proposed. Combined with the fast Fourier transform spectrum correction theory, the high-accuracy identification method of distributed sub-synchronous and super-synchronous harmonic parameter is realised. The feasibility and accuracy of the method is verified by simulation experiments.

关键词： phasor measurement fast Fourier transforms power electronics IEEE standards power system harmonics electrical safety power system parameter estimation power system stability distributed sub-synchronous harmonic parameter fast Fourier transform spectrum correction theory online alarm online parameter identification IEEE Std C37.118-2011 standard WAMS-PMU system communication architecture phasor measurement unit power system safety wide area measurement system power system stability high-accurate estimation method super-synchronous harmonic parameter sub-synchronous oscillation power electronic devices

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Approach for Studying the Impact of Communication Failures on Power grid

Approach for Studying the Impact of Communication Failures o...

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IEEE Power and Energy Society General Meeting

作者： Yusheng Xue Ming Ni Wenjie Yu NARI Technology Inc. and State Key Laboratory of Smart Grid Protection and Control

ISBN: (纸本)9781509041695

In smart grid, a strong communication network plays a very important role, which makes the power grid more controllable and observable. It is a very tough task to study the mutual impact between these two systems due to their different characteristics. This paper proposes a generic and systematic approach for quantitatively studying the impact of communication failures on power grid's measurement and control functions. And an example is used to illustrate how to apply the approach in studying the impact of communication failure on a stability control system.

关键词： Communication failure Communication interruption Power system control Stability control system control system stability Power grids Power system control control function Communication Research networks(communications)

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Design of Rated Power control Strategy of Wind Turbine Based on Particle Swarm Optimization

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IOP Conference Series: Earth and Environmental Science 2018年第1期192卷

作者： YC Yang Y Liu P Song Y Cui Y Bai Department of Control and Computer Engineering North China Electric Power University Beijing 102206 China North China Electric Power Research Institute Co. Ltd. Smart Grid and New Energy Institute Beijing 100045 China Grid-connected Operation Technology for Wind-Solar-Storage Hybrid System State Grid Corporation Key Laboratory

In view of the reduction of wind turbine operating efficiency caused by wind speed measurement errors, this paper proposes a rated power control strategy for wind turbines for practical applications; in order to solve the problem that the pitch PI controller parameters of wind turbines are not easy to calculate and tune in the process of design and optimization, this paper proposes a complete set of methods for parameter tuning of pitch control PI controllers for wind turbines. This paper establishes a Bladed-Matlab co-simulation platform, uses Bladed software to build a complete model of a 2MW wind turbine, and designs a rated power control strategy for wind turbines. After the wind turbine model is linearized at different wind speed points by applying Bladed software, the linearized model for PI parameter tuning is obtained, and then the optimal PI parameters for each wind speed point are set by using particle swarm algorithm. According to the variation law between the PI parameters and the pitch angle obtained before, the PI parameters are adjusted adaptively by variable gain PI control. The simulation results show the superiority of the control strategy and parameter tuning method used in this paper.

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