摘要
虚拟同步发电机模拟同步发电机的惯性和阻尼特性,以提高系统的运行性能。不同的阻尼模拟方式所适用的场合不同,为进一步提高含虚拟同步发电机的微电网运行性能,从模拟同步发电机物理特性和提高频率稳定性两方面,比较不同阻尼表示方法所适用的场合。然后综合比较虚拟同步发电机的有功/频率控制与下垂控制的有功部分,从理论上分析两种控制方法在一定条件下具有的等价性。令逆变器完全模拟同步发电机的惯性和阻尼并不适用于所有场合,根据实际需求,合理设置下垂控制中的参数,才能更好地适应不同情况的需求。最后通过搭建仿真模型,验证理论分析的结果。
Virtual synchronous is designed to mimic the inertia and damping of synchronous generator in order to improve the qualities of the system. Different occasions need different forms of damping effects. For the purpose of further improving the performance of micro grid with virtual synchronous,this paper compares different damping effects in aspects of better mimicking the real synchronous generator modeling and improving the frequency stability.Then,a comprehensive comparison between the active power control of virtual synchronous and damping control of inverters were presented,as analyzing the equivalence between the two methods under particular conditions in theory. It is not always the best way to make inverters mimic synchronous generator. According to real demands,the parameters in droop control can be set more reasonable to adapt for various situations. Finally,a model was built through Simulink to verify the theoretical analysis.
作者
陈虹妃
张宸宇
缪恵宇
杨赟
郑建勇
CHEN Hongfei;ZHANG Chenyu;MIAO Huiyu;YANG Yun;ZHENG Jianyong(School of Electrical Engineering,Southeast University,Nanjing 210096,China;State Grid Jiangsu Electric Power Co.,Ltd.,Research Institute,Nanjing 211103,China)
出处
《电器与能效管理技术》
2018年第15期25-31,44,共8页
Electrical & Energy Management Technology
基金
国网江苏省电力有限公司2018年科技项目(J2018056)
关键词
虚拟同步发电机
下垂控制
阻尼特性
频率稳定性
virtual synchronous generator
droop control
damping characteristic
frequency stability
