当船舶电力推进系统推进电机进行制动时，由于船舶的螺旋桨转速不会突变至零且与推进电机轴系链接，会出现电机电磁转矩与转子转向相反的情况，从而导致转子磁场切割定子绕组，产生的感应电流经逆变器回馈至直流电压侧，这部分回馈到直流电压侧的能量被称为船舶的再生能量。大量的再生能量回馈到逆变器直流侧若不加以消耗和利用不仅会影响船舶能量的利用效率，甚至会影响船舶变频调速系统正常工作。对此本文采用基于LCL并网逆变自抗扰的控制策略将再生能量回馈到船舶电网上，相对于传统船舶再生能量的回收策略，该控制策略不仅使并网电流在并网后很快跟随电网电压相位，而且提高了并网电流的并网质量。另外，在此控制策略中引入有源阻尼前置反馈，大大提高了船舶并网系统的稳定性。
When the propulsion motor brake system of electric propulsion system, due to the ship propeller speed not mutate to zero and the propulsion motor shaft link, there will be a motor electromagnetic torque and rotor to the opposite, resulting in the stator winding of the rotor magnetic field cutting, the induction through the feedback to the dc voltage inverter side. This part of the energy fed back to the DC voltage side is called the regenerated energy of the ship. If a large amount of regenerated energy is fed back to the DC side of the inverter and not consumed and utilized, it will not only affect the energy utilization efficiency of the ship, but also affect the normal operation of the variable frequency speed regulation system of the ship. In this paper, a control strategy based on LCL grid-connected inverter active disturbance rejection is adopted to feed the regenerated energy back to the ship's power grid. Compared with the traditional recycling strategy of ship's regenerated energy, this control strategy not only makes the grid-connected current follow the grid voltage phase soon after the grid is connected, but also improves the grid-connected current quality. In addition, active damping prefeedback is introduced into the control strategy, which greatly improves the stability of the ship grid-connection system.
2022,44(22): 101-105 收稿日期：2021-07-22
DOI：10.3404/j.issn.1672-7649.2022.22.018
分类号：U664.3
作者简介：王旭(1996-),男,硕士研究生,研究方向为先进控制理论及应用
参考文献：
[1] 何孝祖. 永磁同步电机再生能量回馈并网优化研究[D]. 株洲：湖南工业大学, 2020.
[2] 曾宏宇. 船舶电力推进系统能量回馈过程研究与分析[D]. 北京：中国舰船研究院, 2017.
[3] 高善诚. 基于复合型无源控制器弱电网LCL并网逆变器研究[D]. 武汉：湖北工业大学, 2020.
[4] JO H R, KIM Y J, LEE K B. LCL-filter design based on modulation index for grid-connected three-level hybrid anpc inverters[J]. Journal of Electrical Engineering & Technology, 2021, 16(3):
[5] 靖震. 船舶新能源LCL型并网逆变器控制策略研究[D]. 武汉：武汉理工大学, 2018.
[6] 阮新波, 王学华, 等. LCL型并网逆变器的控制技术[M]. 北京: 科学出版社, 2015.
[7] HE Y, WANG X, RUAN X, et al, Capacitor-current proportional-integral positive feedback active damping for LCL-type grid-connected inverter to achieve high robustness against grid impedance variation[J]. IEEE, 2019,34, (12): 12423–12436.
[8] 龙文浩. 光伏并网系统模型降阶研究[D]. 合肥: 合肥工业大学, 2020.
[9] 马明, 廖鹏, 蔡雨希, 等. LCL并网逆变器的自抗扰控制策略[J]. 高电压技术, 2021, 47(6): 2223−2231.
MA Ming, LIAO Peng, CAI Yuxi, et al. Active disturbance rejection control strategy for lcl grid-connected inverter [J]. High Voltage Technology, 201, 47(6): 2223−2231.
[10] 王福豹. 降阶自抗扰控制器参数整定[D]. 北京：华北电力大学(北京), 2020.
