针对在波动光伏条件下电解槽可能会出现运行在非最佳运行区间导致的效率低下和频繁投切导致的电解槽寿命衰减等问题。首先提出一种基于最佳运行区间的混合功率分配策略,该策略采用改进的TOPSIS法来选择电解槽最佳运行区间,在此基础上通过依次分配和平均分配相结合的方式分配各电解槽运行功率,以提高各机组在最佳运行区间内的平均运行时长,提升电解槽机组的总体效率。同时提出一种基于底层循环切换的电解槽机组变滞环投切的策略,通过扩大功率滞环区间以增强机组承受功率波动的能力及依次启停各电解槽的方式以降低电解槽机组总启停次数,并均匀分配阵列中各电解槽的启停次数,延长电解槽机组的寿命。最后,通过仿真验证策略的有效性。
Abstract
Regarding issues such as inefficient operation due to electrolyzers operating outside optimal ranges and degradation of electrolyzer lifespan caused by frequent switching on/off under fluctuating photovoltaic conditions, this study first proposes a hybrid power allocation strategy based on the optimal operating range. This strategy utilizes an improve d TOPSIS method to select the optimal operating range for electrolyzers. Subsequently, a combined approach of sequential allocation and average allocation is employed to allocate the operating power of each electrolyzer, aiming to increase the average operating time within the optimal operating range and enhance the overall efficiency of the electrolyzer unit. Additionally, a strategy is introduced for coordinating the variable hysteresis-loop switching of electrolyzer units with underlying cyclic switching. By expanding the power hysteresis-loop range to tolerate power fluctuations and sequentially starting and stopping each electrolyzer, the aim is to reduce the total start-stop cycles of the electrolyzer unit and evenly distributes the start-stop cycles of each electrolyzer in the array, thereby extending the lifespan of the electrolyzer unit. Finally, the effectiveness of the strategy is verified through simulations.
关键词
光伏 /
制氢 /
电解槽 /
混合功率分配 /
滞环投切策略 /
最优工作区间
Key words
PV /
hydrogen production /
electrolyzer /
hybrid power allocation /
hysteresis-loop switching strategy /
optimal operating range
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