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.
Key words
variable speed drive /
electromechanical coupling /
dynamics /
switched reluctance /
wind generator-hydrogen production /
power transmission
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