This paper presents a novel hydrodynamic pressure transmission (HPT) for continuously variable drive train in wind turbine applications. The HPT mainly comprises of the continuous velocity regulator (CVR), the gear speed-increasing mechanism and the electro-hydraulic system. By controlling the CVR in HPT, the wind turbine can easily capture the maximum wind power while keeping the output power frequency constant. The key components of HPT are modeled and the control strategy of variable speed constant frequency control achieved by the HPT is proposed in the paper. The control performances of HPT are then verified and confirmed in a simulation set-up of a 25kW full-scaled wind turbine. Moreover, the HPT has high control reliability and precision, relatively high transmission efficiency, compact structure, and may be especially suitable for megawatt-scale wind turbine applications.

本文介绍了一种用于风力涡轮机应用中无级变速传动系统的新型流体动压传动 (HPT)。HPT主要由连续速度调节器（CVR）、齿轮增速机构和电液系统组成。通过控制 HPT 中的 CVR，风力发电机可以轻松捕获最大风功率，同时保持输出功率频率恒定。对HPT的关键部件进行建模，提出了HPT实现的变速恒频控制的控制策略。然后在 25kW 全尺寸风力涡轮机的模拟设置中验证和确认 HPT 的控制性能。此外，HPT具有较高的控制可靠性和精度，较高的传动效率，结构紧凑，