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Electrolyzer switching strategy for hydrogen generation from variable speed wind generator

机译：变速风力发电机产生氢气的电解槽切换策略

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摘要

This paper presents a new switching strategy for electrolyzer used in hydrogen generation which is connected to the terminal of a wind farm. The output of wind generator, in general, fluctuates greatly due to the random wind speed variations, which has a serious influence on the power system operation. In this study, the wind farm is composed of variable speed wind turbines (VSWT) driving permanent magnet synchronous generators (PMSG). The hydrogen generator (HG) is composed of rectifier and 10 electrolyzer units where each unit is controlled by the chopper circuit. To smoothen the wind farm line power, at first, a reference for the line power is generated from the difference of exponential moving average of wind farm output and its standard deviation. Then the switching strategy is developed in such a way that the proposed cooperative system can smoothen the wind farm line power fluctuation as well as generating hydrogen gas absorbing the fluctuating portion of wind farm output that lies above the reference line power. This novel switching strategy helps each electrolyzer unit working in full load and shift operation conditions and hence increases its lifespan and efficiency. The performance of the proposed system is investigated by simulation analyses, in which simulations are performed by using PSCAD/EMTDC.
机译：本文提出了一种新的制氢电解槽的切换策略，该电解槽连接到风电场的末端。通常，由于随机的风速变化，风力发电机的输出波动很大，这严重影响了电力系统的运行。在本研究中，风电场由驱动永磁同步发电机（PMSG）的变速风力涡轮机（VSWT）组成。氢气发生器（HG）由整流器和10个电解器单元组成，其中每个单元均由斩波电路控制。为了平滑风电场的线路功率，首先，根据风电场输出的指数移动平均值与其标准偏差之差生成线路功率的参考。然后，以这种方式开发切换策略，以使所提出的协作系统可以平滑风电场线路功率波动，并吸收吸收高于参考线路功率的风电场输出波动部分而产生氢气。这种新颖的开关策略可帮助每个电解器单元在满负荷和换档运行条件下工作，从而延长其使用寿命和效率。通过仿真分析研究了所提出系统的性能，其中使用PSCAD / EMTDC进行了仿真。

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