Abstract:In order to exploit wind energy resources in low wind speed and high shear areas, the hub height of wind turbine needs to be increased. There are three main engineering solutions of high tower, namely all-steel towers, all-concrete towers, and concrete-steel hybrid towers (hybrid towers). Firstly, this paper compares the technical characteristics of the three towers. The results show that the use of hybrid tower combines the advantages and overcomes the disadvantages of both all-steel and all-concrete towers, and is the preferred solution to meet the challenges of high tower. Secondly, this paper reviews the development history and research status of hybrid tower technology around the subject of tower types (chamfered square, cone, chamfered triangle, kidney shape, polygon, self-lift), and summarizes the domestic technological development of hybrid tower into three development stages and three technology genres. Thirdly, this paper introduces the domestic and international industry standards of hybrid tower, and outlines the existing key technology researches of improving the performance, optimizing the cost, shortening the construction cycle and health monitoring of hybrid tower. Finally, this paper summarizes the problems and challenges in the research of hybrid tower technology, including: structure unification, adoption of sub-model analysis techniques, reliability studies, upgrading of old hybrid towers and research on ultra-high hybrid towers, which provide references for new product development. With high stability, long service life and low construction cost, hybrid towers can meet the development requirements of large wind turbine.