船舶光伏-混合储能系统的控制优化
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摘要
为解决光伏-混合储能动力船舶运行中,光伏发电和负载功率接近的临界状态下,蓄电池充放电切换频繁,船舶启动时低电压穿越(LVRT)能力差的问题,在分频协调控制基础上,充分考虑超级电容的剩余电量(SOC),提出一种可变增益值的控制策略,在电力推进负载下进行的仿真实验表明,超级电容SOC可工作在合理区间内,减少蓄电池充放电切换的次数,缩短母线电压恢复的时间。
In order to solve the problems of frequent charge-discharge switching of batteries under the critical state of close photovoltaic(PV) power generation and load power in the operation of PV hybrid energy storage power ships,and poor low voltage ride-through(LVRT) capability during ship start-up,a variable gain control strategy was proposed based on the frequencydivision coordinated control and the residual power of super-capacitor(SOC) is fully considered. The simulation experiments under electric propulsion load showed that the super-capacitor SOC can work in a reasonable range,reduce the number of battery charge and discharge switching,and the time of bus voltage recovery.
In order to solve the problems of frequent charge-discharge switching of batteries under the critical state of close photovoltaic(PV) power generation and load power in the operation of PV hybrid energy storage power ships,and poor low voltage ride-through(LVRT) capability during ship start-up,a variable gain control strategy was proposed based on the frequencydivision coordinated control and the residual power of super-capacitor(SOC) is fully considered. The simulation experiments under electric propulsion load showed that the super-capacitor SOC can work in a reasonable range,reduce the number of battery charge and discharge switching,and the time of bus voltage recovery.
引文
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[2]ZAHEDI B,NORUM L E.Modeling and simulation of all-electric ships with low-voltage dc hybrid power systems[J].IEEE Transactions on Power Electronics,2013,28(10):4525-4537.
[3]王成山,武震,李鹏.微电网关键技术研究[J].电工技术学报,2014,29(2):1-12.
[4]XIAO J,WANG P,SETYAWAN L.Multilevel energy management system for hybridization of energy storages in DC microgrids[J].IEEE Transactions on Smart Grid,2016,7(2):847-856.
[5]张国驹,陈瑶,唐西胜,等.基于波动特征参数的多类型储能协调控制[J].电工技术学报,2013(6):271-276.
[6]程志江,李永东,谢永流,等.带超级电容的光伏发电微网系统混合储能控制策略[J].电网技术,2015,39(10):2739-2745.
[7]侯世英,毕晓辉,孙韬,等.微电网孤岛状态下新型混合储能控制策略研究[J].电机与控制学报,2017(5):15-22.
[8]李霞林,郭力,王成山,等.直流微电网关键技术研究综述[J].中国电机工程学报,2016,36(1):2-17.
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[10]李武华,徐驰,禹红斌,等.直流微网系统中混合储能分频协调控制策略[J].电工技术学报,2016,31(14):84-92.