Thyristor rectifiers (TRs) are cost-effective power supplies for hydrogen electrolyzers (ELZs) but introduce harmonic distortion that may violate grid codes. This letter proposes a self-governing harmonic mitigation strategy through coordinated operation of multiple ELZs in large power-to-hydrogen (P2H) plants. First, the harmonic model of TR-powered ELZs is derived, revealing a natural harmonic cancellation mechanism among them. Based on this, a system-level operation scheme based on phasor modulation is developed and integrated into plant scheduling. Case studies demonstrate that the proposed method reduces harmonic currents by 21.2%-39.7% and ensures grid-code compliance, with only a 0.25% loss in hydrogen output, while increasing total revenue by over 21\% compared to production-oriented strategies.
@article{arxiv.2510.18223,
title = {Harmonic Cancellation in Multi-Electrolyzer P2H Plants via Phasor-Modulated Production Scheduling},
author = {Yangjun Zeng and Yiwei Qiu and Li Jiang and Jie Zhu and Yi Zhou and Jiarong Li and Shi Chen and Buxiang Zhou},
journal= {arXiv preprint arXiv:2510.18223},
year = {2025}
}
Comments
This work has been submitted to the IEEE for possible publication