开关磁阻风电制氢动力传动系统机电耦合动力学分析

为揭示开关磁阻风电制氢动力传动系统的机电耦合作用规律,考虑齿轮系统的详细特性和制氢装置非线性物理细节以及发电机电磁特性,建立包含风轮、齿轮传动系统、开关磁阻发电机、制氢装置的开关磁阻风电制氢动力传动系统机电耦合动力学模型,仿真分析变风况下系统的能量流、机电耦合动力学特性以及并联电解槽数量对系统动态特性的影响。结果表明：相同风速下,他励的制氢功率要大于自励的制氢功率,但他励与自励对传动系统内部动载荷的影响不明显;自励与他励在风速突增过程对系统动态特性略有影响。自励与他励在风速突降过程对系统动态特性有明显影响,他励时系统达到稳态转速时间较长,变速过程产生多次脉冲载荷,增加系统的低频激励;增加并联电解槽数量在一定风速下可增加制氢速率,并联电解槽数量对自励系统的影响不大,但并联电解槽数量增加会恶化他励系统动态特性。

ELECTROMECHANICAL COUPLING DYNAMICS ANALYSIS OF HYDROGEN-PRODUCTION POWER TRANSMISSION SYSTEM OF SWITCHED RELUCTANCE WIND POWER

To reveal electromechanical coupling interaction mechanism of power transmission system of switched reluctance wind generator-hydrogen production, considering detailed characteristics of gear, nonlinear physical details of hydrogen production plants and electromagnetic characteristics of generator, an electromechanical coupling dynamic model is established for the power transmission system of switched reluctance wind generator-hydrogen production, including wind turbines, gear transmission system, switched reluctance generator and hydrogen production plants. The energy flow and electromechanical coupling characteristics as well as influence of electrolyzer number on dynamic characteristics of system are simulated and analyzed under variable wind speed conditions. The results show that although hydrogen production power for separate excitation is higher than that for self-excitation at the same wind speed, the influences of separate excitation and self-excitation on the internal dynamic load of transmission system are not obvious. Separate excitation and self-excitation have a slight influence on dynamic characteristics of system during wind speed increase process. During wind speed decrease process, separate excitation and self-excitation have an obvious influence on dynamic characteristics of system. Separate excitation takes longer to reach steady-state speed and produces multiple impulse loads in varying speed process, which increases low-frequency excitation of system. Increasing electrolyzer number can increase hydrogen production rate at a certain wind speed. The electrolyzer number has little influence for self-excitation, but increasing electrolyzer number will worsen dynamic characteristics for separate excitation.