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

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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Power system cyber attack and its defense

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Dianli Xitong Zidonghua/Automation of Electric Power systems 2016年第5期40卷 148-151页

作者： Ni, Ming Yan, Jie Bo, Rui Tang, Yi NARI Technology Co. Ltd. Nanjing China State Key Laboratory of Smart Grid Protection and Control Nanjing China Midcontinent Independent System Operator Minneapolis United States School of Electrical Engineering Southeast University Nanjing China

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Snort improvement on Profinet RT for Industrial control system Intrusion Detection 2

Snort improvement on Profinet RT for Industrial Control Syst...

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2nd IEEE International Conference on Computer and Communications, ICCC 2016

作者： Zihao, Feng Qin, Sujuan Huo, Xuesong Pei, Pei Ye, Liang Liming, Wang State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing China Data Network of Power Dispatch and Safety Protection of Electric Power Supervisory Control System State Gird Jiangsu Electric Power Company China Safety Protection of Electric Power Supervisory Control System NARI Group Corporation Jiangsu China Dispatching Data Network and Secondary Safety Protection Electric Power Science Research Institute of State Gird Jiangsu Electric Power Company China

ISBN: (纸本)9781467390262

In recent years, the number of information security incidents of industry controlling system has increased dramatically. The intrusion detection system for industrial control systems has received extensive attention. As one of powerful and light weight Network Intrusion Detection system, Snort has good expansibility and translatability, and can be used in various environments. However, Snort has clear deficiency on the intrusion detection of Profinet RT signal. Profinet DCP is an important part of Profinet RT. The intrusion detection for Profinet DCP is very important for the industry controlling systems which use Profinet to connect. To realize the detection for Profinet RT signal, this paper expanded the snort packet decoding engine, and designed a preprocessor plug-ins for Profinet RT signal. Experimental result shows that the improved Snort can support the intrusion detection for Profinet RT signal. © 2016 IEEE.

关键词： Intrusion detection

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Advanced control strategy of SVC based on artificial immune algorithm

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Journal of Computational Information systems 2015年第6期11卷 1965-1972页

作者： Chen, Saisai Li, Kejun Jing, Ping Zha, Guoliang Tian, Xin Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan China Smart Grid Research Institute of State-Grid Changping District Beijing China

For the conventional Static Var Compensator (SVC), there is a contradiction between the response time and system stability. An advanced control strategy is proposed in this paper. Improved Proportional Integral (PI) controller and Artificial Immune Algorithm are adopted in SVC control system, with the response speed of SVC as objective function of optimization. Meanwhile, a non-linear link is added to ensure the stability of the system. The non-linear link is proved that it can significantly improve the stability of the nonlinear system. Simulation results show that the new SVC control strategy can not only track the set voltage value of SVC quickly, but also comprehensively compensate for reactive power and three-phase imbalance. Copyright © 2015 Binary Information Press.

关键词： Static Var compensators

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Integration of protection and control systems for smart substation

Integration of protection and control systems for smart subs...

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2010 5th International Conference on Critical Infrastructure, CRIS 2010

作者： Ma, Jing Wang, Tong Wu, Jie Wang, Zengping Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control Ministry of Education North China Electric Power University 102206 Beijing China State Nuclear Electric Power Planning Design and Research Institute 100094 Beijing China

ISBN: (纸本)9781424480814

Digital based data processing and protection and control system along with digital communication networks introduces new structures for substation protection and control systems and new methods for intelligent protection and control systems. This paper presents a unique vision for the future integration of protection and control systems. Firstly, the basic concept and configuration of the developed protection and control systems for smart substation is introduced. The features and functions of integrated protection and control systems for smart substation are then discussed and compared with that of the traditional substation in detail. © 2010 IEEE.

关键词： Data handling

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The application of voltage direct detection method based on mathematical morphology in distribution network with DG

The application of voltage direct detection method based on ...

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IEEE Conference on Industrial Electronics and Applications (ICIEA)

作者： Peng Li Wei Wang Hongfen Cui Shuai Wang Xilei Yang Yishu Zhao Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control under Ministry of Education North China Electric Power University Baoding Hebei China State Grid of China Technology College Jinan Shandong China

Distributed generation (DG) injects new vigor into the power system, but it sometimes brings unfavorable factors influencing the power quality of distribution network. In this paper, the Dynamic Voltage Restorer (DVR) is introduced to the distribution network to improve the power quality. In view of that the detection of voltage compensation is the key factor that influences the effect of voltage compensation, a voltage direct detection method based on mathematical morphology is proposed. Firstly, the positive-sequence voltage with harmonics can be extracted by the instantaneous sequence-component decomposer. And then the harmonics is filtered by mathematical morphology filter. Lastly, the control variable of voltage compensation needed by DVR can be calculated from the voltage direct-detecting algorithm. The simulation results show that this method has the characteristics of favorable accuracy, real-time performance and simplicity, and assures the voltage quality of load side after compensation by DVR.

关键词： Morphology Power quality Power system harmonics Power harmonic filters Active filters Voltage fluctuations Power system dynamics Voltage control Power generation Power system reliability

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Integration of protection and control systems for smart substation

Integration of protection and control systems for smart subs...

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International Conference on Critical Infrastructures, CRIS

作者： Jing Ma Tong Wang Jie Wu Zengping Wang Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control under Ministry of Education North China Electric Power University Beijing China State Nuclear Electric Power Planning Design and Research Institute Beijing China

关键词： Substations control systems Local area networks Artificial intelligence Monitoring Power system reliability

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Indices system and methods for urban power grid security assessment

Indices system and methods for urban power grid security ass...

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2009 Asia-Pacific Power and Energy Engineering Conference, APPEEC 2009

作者： Jianhua, Zhang Guohua, Zhang Manyin, Duan Jingyan, Yang Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control under Ministry of Education North China Electric Power University Beijing China State Intellectual Property Office of the PRC Beijing China

ISBN: (纸本)9781424424870

An integrated indices system for urban power grid security assessment is proposed, which includes five kinds of indices such as capability of supplying power safely, static voltage security, topological vulnerability, transient security and risk indices. The indices system can scientifically and fully reflect the security level of power grid and provide a quantitative base for the establishment of emergency management technology and measures. The traditional indices and methods for power system security assessment are improved and some indices are first proposed such as "number of lost components after N-K contingencies" and "the largest power supply region index". Based on utility theory and considering effects of external environment on failure probability of lines, risk indices are constructed including "overload risk index", "low voltage risk index", "voltage collapse risk index" and "angle instability risk index". Power system Security Assessment Indices Calculation and Analysis Software is developed, which provides an accessorial and practical tool for power system plan and operation. At last, one urban power grid is used as a research example and the results show effectiveness of the indices system and practicability of the software. © 2009 IEEE.

关键词： Risk management

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Comparison of pitch angle control models of wind farm for power system analysis

Comparison of pitch angle control models of wind farm for po...

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IEEE General Meeting Power& Energy Society

作者： Li. Lin Jing. Zhang Yihan. Yang Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control Ministry of Education North China Electric Power University Beijing China North China Grid Corporation Beijing China

With rapid development of wind power generation, the large capacity wind farms are built up and integrated into transmission network. The effect of wind farms on the grid becomes more serious and more extensive. In order to investigate the dynamic performances of the grid-connected wind farm and the interaction of the wind farms, it is necessary to present the appropriate models of wind farms, which can present the wind power characteristics completely and are not too complicated. In this paper, based on the detailed model of the pitch angle control system, two kinds of simplified pitch angle control models are deduced by mathematics equivalence method. Then the three models are adopted respectively, the relatively dynamic characteristics of the wind farm and the grid are compared. Later, the wind farm with different pitch angle control model is connected to the CIGRE B4-39 grid, and the simplified models are verified by simulation. Finally, the methods how to choice pitch angle control models are present.

关键词： Power system modeling Wind farms Power system analysis computing Power system control Power systems Power system dynamics Mathematical model Wind power generation Wind energy control system synthesis

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A novel approach to eliminate zero-sequence harmonics current

A novel approach to eliminate zero-sequence harmonics curren...

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IEEE Asia-Pacific Conference on Circuits and systems

作者： Qipeng Song Zhongdong Yin Chengxi Dai Changyin Zhang Weidong Shang Zhonghua Huang Key Laboratory of Power System Protection and Dynamic Monitoring and Control Ministry of Education University Beijing China Kaifeng Power Supply Corporation Kaifeng China Kaifeng Power Supply Corporation The state grid corporation of China Kaifeng

Zero-sequence harmonics caused by nonlinear loads usually result in high voltage distortion levels throughout the facility, neutral conductor overloading, motor heating, transformer heating, increased losses, and excessive harmonic injection onto the utility supply system. This paper presents a novel method to eliminate zero-sequence harmonics by using Zero-sequence Resister Block (ZRB) and Zig-Zag transformer. Zig-Zag transformer is a special connection of three-phase transformerpsilas windings. The ZRB is also a special connected transformer, whose three windings are wounded in the same core. The ZRB has zero reactance for positive and negative-sequence components but giving three times of self-reactance for zero-sequence reactance. In this paper, an analysis is carried out; simulations and laboratory tests are used to evaluate the performance of the Zig-Zag transformer and ZRB under various system conditions. The simulation and laboratory test results indicate that the combination of ZRB and Zig-Zag transformer as filter is a better and effective way to attenuate the neutral current, which also provides an innovational way to improve power quality.

关键词： Power harmonic filters Heating Laboratories Harmonic distortion Conductors Transformer cores Performance analysis Analytical models system testing Power quality

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