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Research on Application of Superconducting Magnetic Energy Storage in the Wind-Grid Connectting System

Author: QuanBo
Tutor: ZhouXueSong
School: Tianjin University of Technology
Course: Proceedings of the
Keywords: Superconducting Magnetic Energy Storage(SMES) Converter Wind Power Wind Power Grid-Connect Superconducting Power Technology Superconducting Application
CLC: TM917
Type: Master's thesis
Year: 2011
Downloads: 330
Quote: 0
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Abstract


With exhaustion of conventional fossil energy,it has more opportunities of new energy development and use, such as wind energy, solar energy, tidal energy and so on. Power energy, being high dependence on primary, its development and survival is associated with the opportunities and challenges. Wind Power, as one of the most mature, most large-scale development, most commercial development prospects Power generation in the new energy technology, its grid-connect becomes an inevitable initiative. Due to the randomness and uncertainty of wind speed, the outputting power of wind power system has large fluctuations, and it’s one of the most important to impede large-scale wind power grid-connect. Hence, research on method to improve the stability of wind farm and to suppress wind power grid-connect fluctuation has become a urgent solved problem of wind power technology.Due to the form of Superconducting magnetic energy storage system is electromagnetic energy,its greatest advantage is low loss, large energy storage density, rapid response capability and independence of the four-quadrant operation capability, making the SMES system as a power of suppressed volatility and the new ideal balance of power load device has been widespread concern at home and abroad, and achieved fruitful results. It proof SMES has a great advantage of increasing stability, balance electricity load and improve power quality, and so on.In order to improve reliability and security of wind power systems, the application of Superconducting magnetic energy storage systems in wind-grid power systems has been proposed inhibit the wind farm output power fluctuations. The main contents are:First, an overview of energy storage in wind power technology research status and superconducting technology in the power system in the future, the need for the application of SMES in the wind power system is provided; and in-depth analysis and comparison of structure and performance of SMES using current converter inverter and voltage source converter, the basis for selection of SMES application in wind power system and converter application in other areas is provided, a theoretical basis using voltage source converter SMES in this paper is also provided.Secondly, voltage source converter SMES application in wind power systems is done, principle of controlling wind-grid system power using the superconducting magnetic energy storage is analysis, the SMES controller is design that it is based on frequency and voltage regulation, has double loop control strategy, the outer controller is the closed-loop voltage control, the inner control is active and reactive current control.Finally, VSC SMES’s phasor quantity model is established. And the wind farm model and the conventional power grid model which are simulation using the MATLAB / simulink are chose. The results show that the outputting power of wind power grid-connect system with VCS SMES is better stability than wind power grid-connect system without VCS SMES. This method can inhibit outputting power fluctuation of wind power systems and improve grid reliability.Based on the study of superconducting magnetic energy storage, its application research in the wind power grid-connect system have done. The results show SMES can improve grid reliability. The theoretical basis of SMES’s application in the field of wind power.With rapid development of high-temperature superconducting technology and power electronics technology, high-temperature superconducting magnetic energy storage will be more broad application prospects.

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CLC: > Industrial Technology > Electrotechnical > Independent power supply technology (direct power) > Current body power generation, body electrical power generation, power generation of superconductors
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