基于DC-BR的船舶电推直流母线电压稳定控制策略  

Voltage Stability Control Strategy of Marine Electric Propulsion DC Bus Based on DC-BR

作　　者：刘炜[1] 樊志鹏 LIU Wei;FAN Zhipeng(Guangzhou Panyu Polytechnic,Guangzhou 511400,China;CRRC Dalian R&D Co.,Ltd,Dalian 116023,Liaoning,China)

机构地区：[1]广州番禺职业技术学院,广州511400 [2]中车大连电力牵引研发中心有限公司,辽宁大连116023

出　　处：《船舶工程》2021年第12期145-150,195,共7页Ship Engineering

基　　金：广州番禺职业技术学院科技类项目2021年度课题(2021KJ10)。

摘　　要：在船舶综合电力推进系统中,母线电压的稳定性对整船用电设备的正常运行有重要影响,当主推或侧推电机突然加载时,会给直流配电系统带来巨大的冲击。针对后级系统固有的恒功率负阻抗特性易导致直流母线产生振荡的情况,建立船舶综合电力推进系统模型,并以直流母线为界,将电力推进系统看作由前级变换器和后级变换器组成的级联系统。在此基础上,推导出前级和后级闭环控制的阻抗模型,同时提出在母线侧并联直流母线振荡调整器(DC-BR)的控制策略,并从频域的角度分析所提控制策略对电力推进系统直流母线稳定性的改善效果。通过时域仿真对该控制策略的有效性进行验证,结果表明所提控制策略准确、有效。In the marine integrated electric propulsion system,the stability of bus voltage is very important for the normal operation of the electrical equipment of the whole ship,but when the main thrust or side thrust motor is suddenly loaded,it will bring huge impact to the DC distribution system.In view of the phenomenon that the inherent constant power negative impedance characteristic of the post stage system is easy to cause DC bus oscillation,the model of marine integrated electric propulsion system are established,and the electric propulsion system into cascaded system composed of front stage and rear stage converters with DC bus as the boundary are divided.On this basis,the impedance models of front stage and rear stage closed-loop control are derived,At the same time,the control strategy of parallel dc-br on the bus side is proposed,and the improvement effect of the proposed control strategy on the DC bus stability of electric propulsion system is analyzed from the perspective of frequency domain.Finally,the time domain simulation is applied to verify again,and the results show that the proposed control strategy is accurate and effective.

关 键 词：船舶综合电力推进 级联系统 直流母线振荡调整器(DC-BR) 阻抗模型 稳定性 

分 类 号：U664.14[交通运输工程—船舶及航道工程]