Communications for Coordinative Control of Wind Power Systems

Research output: Book/ReportPh.D. thesisResearch

Abstract

Due to the rapid development of wind energy and the smart grid requirement on modern power systems, data communication technologies in wind power system play an increasingly important role. The objective of the project is to investigate communication system attributes and develop advanced power system control strategies for wind power integration, in order to achieve coordinative control for a secure and efficient power system.

The project basically contains three main aspects: studies on DGS (Distributed Generation System) characteristics, analysis of communication technologies, and integration of power system and communication system. For the DGS studies, the main components, such as WTs (Wind Turbines) and CHPs (Combined Head and Power), are modelled. Since WTs are sensitive to disturbances, one focus of this PhD study is the investigation of WTs characteristics; mainly covering FSIG (Fixed Speed Induction Generator) and DFIG (Doubly-Fed Induction Generator) based wind turbine systems. Based on the study, the critical points to stabilize FSWTs (Fixed Speed Wind Turbines), after disturbances, are determined. This demands the latency requirements on the possible control and protection operations to avoid any undesired WTs cutting off. In the studies of communication systems, the attributes of the three levels’ data communication system, covering WAN (Wide Area Network), LAN (Local Area Network) and CAN (Control Area Network), associated with wind power systems, are obtained and analyzed. Subsequently, by integrating power system and communication system, a control strategy for an island WTDGS (Wind Turbine connected DGS) is proposed, which covers active power control, reactive power control, under frequency and under voltage load shedding, to keep the balance of generation and consumption. The performances of FSWT and DFIG connected DGS are compared and analysed. At last, the cyber security study is presented, due to the important place of security in power system communications. A security domain model is proposed to guide the implementation of the security technologies. Cyber security related simulation results reveal the important impact of the security configuration on improving the performance of the associated electric power system data communication systems.

This PhD study explores a new aspect of the investigations of wind power system components characteristics, from communication technologies point of view. For instance the tolerance time limit of FSWTs’ keeping stability under some disturbances may be achieved by such studies. A simulation platform integrating the communication system and the power system is proposed. This methodology reflects the latency feature in the reliability and stability of WTDGS studies, which can realistically express the influences of the nature of communication systems.
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Due to the rapid development of wind energy and the smart grid requirement on modern power systems, data communication technologies in wind power system play an increasingly important role. The objective of the project is to investigate communication system attributes and develop advanced power system control strategies for wind power integration, in order to achieve coordinative control for a secure and efficient power system.

The project basically contains three main aspects: studies on DGS (Distributed Generation System) characteristics, analysis of communication technologies, and integration of power system and communication system. For the DGS studies, the main components, such as WTs (Wind Turbines) and CHPs (Combined Head and Power), are modelled. Since WTs are sensitive to disturbances, one focus of this PhD study is the investigation of WTs characteristics; mainly covering FSIG (Fixed Speed Induction Generator) and DFIG (Doubly-Fed Induction Generator) based wind turbine systems. Based on the study, the critical points to stabilize FSWTs (Fixed Speed Wind Turbines), after disturbances, are determined. This demands the latency requirements on the possible control and protection operations to avoid any undesired WTs cutting off. In the studies of communication systems, the attributes of the three levels’ data communication system, covering WAN (Wide Area Network), LAN (Local Area Network) and CAN (Control Area Network), associated with wind power systems, are obtained and analyzed. Subsequently, by integrating power system and communication system, a control strategy for an island WTDGS (Wind Turbine connected DGS) is proposed, which covers active power control, reactive power control, under frequency and under voltage load shedding, to keep the balance of generation and consumption. The performances of FSWT and DFIG connected DGS are compared and analysed. At last, the cyber security study is presented, due to the important place of security in power system communications. A security domain model is proposed to guide the implementation of the security technologies. Cyber security related simulation results reveal the important impact of the security configuration on improving the performance of the associated electric power system data communication systems.

This PhD study explores a new aspect of the investigations of wind power system components characteristics, from communication technologies point of view. For instance the tolerance time limit of FSWTs’ keeping stability under some disturbances may be achieved by such studies. A simulation platform integrating the communication system and the power system is proposed. This methodology reflects the latency feature in the reliability and stability of WTDGS studies, which can realistically express the influences of the nature of communication systems.
Original languageEnglish
PublisherDepartment of Energy Technology, Aalborg University
Number of pages208
StatePublished - 2012
Publication categoryResearch
ID: 187819704