应用于储能变流器的虚拟同步发电机阻尼特性分析与改进Analysis and Improvement of Damping Characteristics of Virtual Synchronous Generator Control Applied to Energy Storage Converter
许崇福;李菀茹;徐宁一;王弋飞;刘永慧;宁改娣;王跃;
摘要(Abstract):
针对使用虚拟同步发电机策略控制储能变流器时,孤岛微电网中采用常数阻尼系数控制会导致稳态有功功率偏差的问题,首先建立了基于虚拟同步发电机控制的储能变流器小信号模型,分析了并网模式和孤岛模式下阻尼系数对有功功率振荡的影响规律,然后提出了一种改进的基于稳态频率差值补偿的阻尼控制方法。之后研究了改进阻尼控制对系统稳定性和动态特性的影响,通过仿真和实验验证了改进的阻尼控制可以解除阻尼对稳态有功下垂特性的影响,在保证不影响稳态有功功率分配的前提下有效抑制系统振荡。
关键词(KeyWords): 储能变流器;虚拟同步发电机;阻尼系数;小信号模型;功率分配
基金项目(Foundation): 国家自然科学基金项目(51777159);; 中央高校基本科研业务费专项资金项目(xzy022019035)~~
作者(Author): 许崇福;李菀茹;徐宁一;王弋飞;刘永慧;宁改娣;王跃;
Email:
DOI: 10.13335/j.1000-3673.pst.2019.0515
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