摘要
作为支撑微网稳定运行的关键器件,变流器的产生有效提升了控制灵活性,但系统惯性的降低也增加了能量平衡与稳定控制的难度,对电力系统产生不可忽视的影响。提出一种基于船用交直流混连微电网的变流器控制策略,结合柴油发电机并联运行系统中柴油发电机组的下垂特性和变流器的恒功率(PQ)控制策略,分析并联控制情况下系统的动态特性。在MATLAB/Simulink中建立交直流微电网运行的仿真模型进行试验验证,结果表明:在变流器采用PQ控制的工况下,电网性能指标良好,达到了预期的控制效果。
As a key device supporting the stable operation of the microgrid,the generation of the converter effectively improves the control flexibility,but the reduction of the system inertia also increases the difficulty of energy balance and stable control,and has a non-negligible impact on the power system.A converter control strategy is proposed based on the marine AC/DC hybrid microgrid.Combining the droop characteristics of the diesel generator set in the parallel operation system of diesel generators and the power quality(PQ)control strategy of the converter,the dynamic characteristics of the system under parallel control are analyzed.A simulation model of AC/DC microgrid operation is established in MATLAB/Simulink for experimental verification.The results show that when the converter adopts PQ control,the grid performance index is good and the expected control effect is achieved.
作者
李雪莹
杨勇兵
黄鹤
LI Xueying;YANG Yongbing;HUANG He(Shanghai Marine Diesel Engine Research Institute,Shanghai 201108,China)
出处
《机电设备》
2023年第2期99-106,共8页
Mechanical and Electrical Equipment
关键词
船舶
交直流电网
PQ控制
并联控制
ship
AC/DC power grid
power quality(PQ)control
parallel control
