摘要
为保证船舶电网电压波动时船舶电压敏感型负载工作的稳定性,根据动态电压恢复器(Dynamic Voltage Restorer,DVR)的结构和电压补偿策略,并结合船舶自身特点,提出无功功率补偿策略和有功功率补偿策略两种电压补偿策略。在负载端电压偏离额定值的情况下,前者通过施加在q轴上的负载电压闭环控制,使设备仅向系统提供无功功率即可恢复负载端电压,设备无需储能且经济性较好;对于无功功率补偿策略补偿能力有限的负载,则通过施加在d轴上的负载电压闭环控制,使设备既提供无功功率又提供有功功率,恢复负载端电压,适用于电压大范围变化的负载。两种策略均在MATLAB/Simulink环境下进行验证,仿真结果表明这两种方法均可在短时间内使负载端电压恢复至额定值。
To guarantee the stability of the voltage on dependent loads when the ship power grid fluctuates,a new voltage compensation method which combines reactive power compensation with active power compensation is introduced based on the structure and voltage compensation method of DVR(Dynamic Voltage Restorer)and characteristics of the ship.When the voltage on a load deviates out of the rated range,the reactive power compensation uses the closed loop of the load voltage on q axis to restore the voltage on the load to the rated range only through providing reactive power to the system.Therefore,this method does not need power storage and has better economy.The active power compensation uses the closed loop of the load voltage on d axis to restore the voltage on the load to the rated range providing both active and reactive power to the system under the condition that the reactive power compensation only can not restore the voltage as the voltage on load varies in a wide range.The two methods are verified with the MATLAB/Simulink.The results prove that both methods are able to restore the voltage on the load to the rated range in a short time.
作者
孙亮
徐合力
高岚
SUN Liang;XU Heli;GAO Lan(School of Energy and Power Engineering,Wuhan University of Technology,Wuhan 430063,China;Key Laboratory of Marine Power Engineering Technology Transportation Industry,Wuhan University of Technology,Wuhan 430063,China)
出处
《中国航海》
CSCD
北大核心
2019年第4期91-96,共6页
Navigation of China
关键词
船舶稳压装置
电压敏感型负载
动态电压恢复器
无功功率补偿
有功功率补偿
ship voltage stabilizer
voltage dependent load
dynamic voltage restorer
reactive power compensation
active power compensation
