船舶混合推进系统制动过程分析与研究

Braking Process Research of Ship Hybrid Propulsion Sytem

混合动力系统采用轴带电机再生制动来吸收制动能量实现快速制动,但制动电阻的选型和控制分析需要大量的计算和校核。针对此问题,对混合动力船舶制动过程中螺旋桨负载的转矩随转速变化的特性进行仿真分析,提出基于轴带电机最大转矩电流比(MTPA)控制的制动控制策略和基于该控制方式的制动电阻选型过程、选型方法并进行仿真验证。仿真中轴带电机以MTPA控制方式实现了电磁转矩一直保持其最大转矩的快速制动;经仿真对比,小于等于5Ω的制动电阻选型方案能够满足目标船制动能量消耗需求。所形成的制动电阻选型及验证方法,能够在装船前对该关键部件与船舶的适配性进行很好地优化与验证,对于新型混合动力推进系统船舶关键部件的设计具有指导意义。

Hybrid propulsion ship realize fast braking by regenerative braking of the shaft motor,but the braking resistor selection and its control analysis counts on massive calculation and verification.Aiming at this question,this paper analyses the torque characteristics of propeller in the braking process of hybrid propulsion ship by simulation,suggests the braking control method based on Maximum Torque Per Ampere(MTPA)control of shaft motor and the braking resistance selection approach,which is tested by simulation.The results show that the MTPA control method realized fast braking,and the braking resistance selection scheme fulfils the target’s energy-consumption requirements.Through simulation comparison,the braking resistance selection scheme less than or equal to 5Ωcan meet the target ship's braking energy consumption requirements.This approach,which can optimize and verify the adaptability of ship’s crucial parts,is of great guiding significance on the design of them.