南方能源建设 (Jun 2019)

New Model of Dual-axis Tracking Photovoltaic Power Generation Technology

  • ZHANG Xing,
  • HE Guangling,
  • WANG Qizhi,
  • HU Chang,
  • DU Bo

DOI
https://doi.org/10.16516/j.gedi.issn2095-8676.2019.02.004
Journal volume & issue
Vol. 6, no. 2
pp. 19 – 28

Abstract

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[Introduction] To develop the technical and economical efficiency of traditional photovoltaic (PV) power generation, new type dual-axis tracking PV power generation technology is proposed, that focuses on the solution to the fixed PV on water surface. [Method] A new type of ground and water-based dual-axis tracking PV power generation technology was provided, where single-axis PV arrays were arranged on a large disc supported by trusswork structure, and rotated very slowly with a fixed center.Based on the layout of PV array, the land and energy utilization of this new system were analyzed. Moreover, compared with the traditional PV, the technical and economic analysis, which indicated the increasing of power generation and cost of the new system, was achieved. [Result] The new dual-axis tracking system conserve land, which would only cover about 50% of the area for the traditional dual-axis tracking technology.The proposal system increases power generation. The dual-axis tracking type system increases by 35%~45% compared with the fixed PV system. The water surface PV will increase by another 6%~15%.Stable period of power generation could be achieved fastly.Only one azimuth and altitude angle detection device are needed for new dual-axis tracking system. One driven device could satisfy the azimuth angle tracking and altitude angle tracking system could be driven by centralized power supply in different regions. The technical and economic indicators are better, especially compared with the traditional water surface PV system.Easy operation and maintenance could be available. Gantry crane frame structure is adopted, and it is convenient to repair and clean the steel truss with equal spacing moving forward, backward, left and right, up and down. [Conclusion] The new dual-axis tracking system is more economical, power generation more stable and more convenient maintanence, which could have popularization prospect.

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