摘要
当微电网运行在孤岛模式时,由于缺乏大电网电压和频率的支撑,微电网受到扰动后易出现运行失稳。为此,以交流微电网为研究对象,对其孤岛运行下的控制策略及稳定性展开研究,提出了一种基于优化级联电平控制的独立孤岛微电网负荷资源梯级调控方法,通过在每个单元中采用优化的分散级联双电平控制器来实现输出电压总谐波畸变(THD)的最小化,改善了微电源在各种负载条件下的电能质量,且通过确保无功功率共享,实现了循环电流缓解。最后,基于微电网实验平台在共耦合点处注入了电压闪烁源,进行了系统稳定性分析,并确保了其稳定性。结果表明,所提出的负荷资源调控方法确保了电能质量改进,允许有功和无功功率共享,可以有效实现城市电网负荷资源梯级调控。
When the microgrid operates in islanding mode,it is prone to operational instability due to the lack of support from the voltage and frequency of the main grid.Therefore,the control strategy and stability under its islanding operation were studied which taking the communication microgrid as the research object.A load resource cascade control method for independent islanded microgrids based on optimized cascade level control was proposed.By using an optimized decentralized cascade two-level controller in each unit to minimize the total harmonic distortion(THD)of the output voltage,the power quality of the microgrid under various load conditions was improved,and cyclic current relief was achieved by ensuring reactive power sharing.Finally,based on the microgrid experimental platform,a voltage flicker source was injected at the common coupling point to conduct system stability analysis and ensure its stability.The results indicate that the proposed load resource regulation method ensures the improvement of power quality,allows active and reactive power sharing,and can effectively realize the cascade regulation of load resources in urban power grid.
作者
龙娓莉
王泽浩
梅超
张伟
Long Weili;Wang Zehao;Mei Chao;Zhang Wei(Xiamen Electric Power Supply Company,State Grid Fujian Electric Power Co.,Ltd.,Xiamen 361000,China;CHN Energy Tonghui(Beijing)Technology Co.,Ltd.,Beijing 100000,China)
出处
《能源与环保》
2025年第5期219-226,共8页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
基金
福建省省级重点项目(SGFJXM00FZWT2201134)。
