Research on virtual synchronous control technology for PEM electrolysis hydrogen production

doi:10.19799/j.cnki.2095-4239.2024.0386

Abstract

Abstract:

The electrolytic water hydrogen production system, integrated with hydrogen storage, serves as an ideal adjustable resource by regulating power and facilitating large-scale renewable energy consumption. This study introduces virtual synchronous motor (VSM) control technology into electrolytic hydrogen production to address issues of insufficient inertia and poor frequency stability arising from the large-scale integration of renewable and clean energy into power grids. Using the proton exchange membrane (PEM) electrolysis hydrogen production system as a case study, a VSM control strategy is proposed. First, the independent adjustment of the electrolytic cell's power is achieved by implementing a DC current control mechanism, effectively reducing grid frequency fluctuations during load variations. Next, the impact of current regulation rate limits within the electrolytic cell on the frequency adjustment transition process is analyzed. A microgrid simulation system is then developed using MATLAB/Simulink. Experimental results indicate that, compared to traditional double closed-loop control, the PEM electrolysis hydrogen production system based on VSM control independently adjusts the hydrogen production power during grid load changes, reducing grid frequency variation by 64.71%.

Key words: virtual synchronous motor, PEM electrolysis hydrogen production system, frequency adjustment, inertia damping

CLC Number:

TM 76

Xinqiao FAN, Kuan ZHANG, Bo ZHAO, Min LIU, Qiliang WU. Research on virtual synchronous control technology for PEM electrolysis hydrogen production[J]. Energy Storage Science and Technology, 2024, 13(11): 3949-3960.

Figures/Tables 14

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电路参数	取值
三相相电压幅值/V	380
电网频率f/Hz	50
同步机电源有功功率/kW	32
同步机电源的惯量J_G	4
同步机电源的阻尼D_G	76.5
同步机电源下垂系数D_P	1000
同步机电源下垂系数D_Q	0.002
网侧滤波电感L'/H	4.98
网侧电阻R'/Ω	0.03
直流侧电容C_dc/mF	0.1
直流侧电感L_dc/H	0.2
电解槽有功负荷/kW	31
下垂系数D_p	1000
下垂系数Dq	0.002
惯性参数J	2
阻尼系数D	75
电流变化速率K_I	200

参数	工况1：在电网侧进行负荷投切测试	工况2：对电解槽进行并联运行测试
负荷变换时间/s	3	3
负荷恢复时间/s	6	6
负荷变换大小/kW	17.5	31

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