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Frequency Control of Power System with Solar and Wind Power Stations by Using Frequency Band Control and deadband Control of HVDC Interconnection Line

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Journal of Power and Energy Engineering 2018年第9期6卷 48-63页

作者： Kimiko Tada Takamasa Sato Atsushi Umemura Rion Takahashi Junji Tamura Yoshiharu Matsumura Tsukasa Taguchi Akira Yamada Department of Electrical and Electronic Engineering Kitami Institute of Technology (KIT) Kitami Japan Hokkaido Electric Power Co. Inc. Sapporo Japan

In recent years, environmental problems are becoming serious and renewable energy has attracted attention as their solutions. However, the electricity generation using the renewable energy has a demerit that the output becomes unstable because of intermittent characteristics, such as variations of wind speed or solar radiation intensity. Frequency fluctuations due to the installation of large scale wind farm (WF) and photovoltaics (PV) into the power system is a major concern. In order to solve the problem, this paper proposes two control methods using High Voltage Direct Current (HVDC) interconnection line to suppress the frequency fluctuations due to large scale of WF and PV. Comparative analysis between these two control methods is presented in this paper. One proposed method is a frequency control using a notch filter, and the other is using a deadband. Validity of the proposed methods is verified through simulation analyses, which is performed on a multi-machine power system model.

关键词： High Voltage Direct Current (HVDC) System Frequency Control PV Power Generation Wind Power Generation Notch Filter deadband

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deadbands and the Dynamic Response and Performance of Large Water Transfer Canal System

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Journal of Northeast Agricultural University(English Edition) 2009年第2期16卷 58-65页

作者： DING Zhiliang WANG Changde TAN Guangming GUAN Guanghua State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University Wuhan 430072 China

An operating simulation mode for multireach canal system in series under gate regulating is established. The discharge feedforward plus water lever feedback PID controller was adopted. And the performance indicators are introduced to evaluate the control effects of canal operation. Influence on dynamic response process and dynamic performance as well as the control actions of canal system are studied according to the variation of the gate deadband and water level deadband. The results showed that the larger the gate deadband, the worse, the control effect of canal system over water level, and so done the stable process of gate discharge, yet the stable process of gate opening was getting better, while the upstream gate regulation of each canal pool was less at the time when canal stabilizes; the closer to downstream end of canal, the lager steady-state error of this canal pool was, and the lager influence of gate deadband on the steady-state error as well as response time of this canal pool was; the canal system can not acquire superiority in both the control performance and control actions when only the water level deadband was established.

关键词： canal operation deadband PID controller performance indicator dynamic response dynamic performance

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Scheduling and control co-design for Networked Wind Energy Conversion Systems

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Global Energy Interconnection 2019年第4期2卷 328-335页

作者： Zhihong Huo Zhixue Zhang College of Energy and Electrical Engineering Hohai UniversityNanjing210098JiangsuProvinceP.R.China Research&Development Center Nari-Relays Electric Co.LTDNanjing211106Jiangsu ProvinceP.R.China

Fieldbus, industrial Ethernet that is simple, reliable, economical, and practical, is widely used in Wind Energy Conversion Systems(WECSs). These techniques belong to the field of networked control systems. Network embedding to Wind Energy Conversion Systems brings many new challenges. Implementing a control system over a communication network causes inevitable time delays that may degrade performance and can even cause instability. This work addresses challenges related to the reliable control of wind energy conversion systems, based on the theoretical framework of networked control systems. A type of WECS with network-induced delay and packet dropout is modeled and adjustable deadbands are explored as a solution to reduce network traffic in WECSs. A method to study the reliable control of WECSs is presented, which takes into account system response as well as the network environment. After detailed theoretical analysis, simulation results are provided, which further demonstrate the feasibility of the proposed scheme.

关键词： Wind Energy Conversion System(WECS) Networked Control System(NCS) Time-delay deadband Package-dropout

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A Parameter Determination Method of Distribution Voltage Regulators Considering Tap Change and Voltage Profile

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Journal of Energy and Power Engineering 2012年第1期6卷 117-125页

作者： Yuji Hanai Yasuhiro Hayashi Junya Matsuki Yoshiaki Fuwa Kenjiro Mori Department of Electrical and Electronics Engineering University of Fukui Fukui 910-8507 Japan Graduate School of Advanced Science and Engineering Waseda University Tokyo 169-8050 Japan Distribution Department Power Network Division Tokyo Electric Power Company Tokyo Japan

This paper proposes a parameter determination method of distribution voltage regulators load ratio control transformers （LRT） and step voltage regulators （SVR） considering the tap change and voltage profile. The method takes two procedures in order to simplify the optimization problem and to reduce calculation time. One is to simultaneously determine the control parameters of LRT and SVR minimizing voltage violations and voltage variations. The algorithm is based on particle swarm optimization （PSO）, which is one of non-linear optimization methods by using a concept of swarm intelligence. Another is to determine the dead-band width of LRT and SVR on the basis of bi-evaluation of tap change and voltage margin. The concept of a Pareto optimal solution is used for the decision of the best dead-band width. As the results of numerical simulations using distribution network model, the validity of the proposed method has been affirmed.

关键词： Distribution network voltage control LRT SVR control parameter deadband PSO.

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Robust Reliability Design for Nonlinear Networked Control Systems

Robust Reliability Design for Nonlinear Networked Control Sy...

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第40届中国控制会议

作者： Zhihong Huo Zhixue Zhang Chang Xu Namei Zeng College of Energy and Electrical Engineering Hohai University NR Electric Co. Ltd

Network control system（NCS） is a kind of distributed control system, which is widely used in industrial control process. The communication network is used to exchange information and control signals among various physical components of subsystems. The transmission of data and information on the communication network to achieve system control will lead to the inevitable delay of information transmission time, which will reduce the performance and even make the system *** network traffic is one of the most effective methods to reduce the impact of network control system delay on system performance. This paper discusses the adjustable deadband as a method to reduce network traffic in networked control systems,and proposes a modeling method of networked control systems with random delay and communication constraints based on quasi T-S fuzzy model. Based on robust fault-tolerant control theory and information scheduling theory, the integrity design of this kind of networked control system is analyzed. After detailed theoretical analysis, simulation results are given to furth er verify the proposed scheme.

关键词： Networked control systems(NCS) Integrity design deadband Random time delays T-S fuzzy modeling

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