针对“双碳”目标下高比例可再生能源高效消纳难题,将水电解制氢作为弹性负荷接入微电网群,建立电-氢微电网群,提出一种功率协调控制和电能质量提升策略。首先分析交直流子网功率耦合机制,基于互联变换器建立考虑子网优先级的双向功率控制方法,将弹性负荷接入低优先级子网,提出基于实时子网偏差系数计算的分层功率协调控制策略;然后针对由水电解制氢整流器引入的谐波问题,提出基于实时负荷阻抗估计和下垂控制的多台互联变换器协同提升电能质量的控制技术;最后,通过Matlab/Simulink软件平台,搭建环形连接微电网群,仿真实验结果表明所提策略动态响应快,验证了功率协调和谐波补偿控制策略的有效性。
Abstract
Aiming at the problem of efficiently consuming ahigh proportion of renewable energy under the dual carbon goals, hydrogen production through water electrolysis is connected to the microgrid clusters as resilient load, and the electricity-hydrogen energy microgrid clusters is established, and the power coordinated control and power quality improvement strategyies are proposed. Firstly, the power coupling mechanism of AC/DC subgrid is analyzed, a bidirectional power control method considering subnet priority is established based on the interlinking converter, and the resilient load is connected to the low-priority subgrid, and a hierarchical power coordination control strategy based on real-time operation state-deviation in each-subgrid calculation is proposed. Then, aiming at the harmonic problem introduced by the rectifier for hydrogen production through water electrolysis, a control technology based on real-time load impedance estimation and droop control of multiple interconnected converters to improve power quality is proposed. Finally, through the Matlab/Simulink software platform, a ring connection microgrid clusters is built, and the experimental results show that the proposed strategy has fast dynamic response, which verifies the effectiveness of the power coordinated control and harmonic compensation strategies.
关键词
氢能 /
制氢 /
微电网 /
变换器 /
分层功率协调控制 /
谐波补偿
Key words
hydrogen energy /
hydrogen production /
microgrid /
converter /
hierarchical power coordinated control /
harmonic compensation
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基金
湖北省自然科学基金青年项目（2021CFB030）; 国家自然科学基金面上项目（51877161）
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