摘要
为解决采用虚拟同步发电机控制方法的分布式发电系统接入配电网运行的稳定性问题,提出一种虚拟同步控制变换器的并网运行阻抗边界确定方法,导出同时满足并网变换器的功率控制性能、稳定极限、系统负载允许变化范围和小信号稳定性的阻抗边界条件。给出了虚拟阻抗的配置方法,可使系统获得良好的动态控制性能与稳定性。采用Matlab/Simulink仿真验证了系统阻抗边界和虚拟阻抗配置方法的有效性,最后给出了部分实物装置实验案例结果。
To solve the issue of operational stability of a distributed generation system controlled by Virtual Synchronous Generator(VSG)method when it is integrated into distributed grid,a method to determine the impedance boundaries of a grid-connected VSG controlled converter is proposed.And the impedance boundary conditions are deduced which can satisfy the power control performance,stability limit,system load allowable range and small signal stability of the grid-connected converter at the same time.A configuration method of virtual impedance is then proposed which makes the system have both good dynamic control performance and stability.The Matlab/Simulink simulation results verify the effectiveness of the system impedance boundary and the virtual impedance configuration method.Some results of experimental cases are also given.
作者
陈佳瑜
李征
张骞
蔡旭
熊坤
CHEN Jiayu;LI Zheng;ZHANG Qian;CAI Xu;XIONG Kun(College of Information Science and Technology,Donghua University,Shanghai 201600,China;School of Electronic Information and Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2019年第21期30-40,共11页
Power System Protection and Control
基金
国家自然科学基金重点项目资助(51837007)~~
关键词
虚拟阻抗
功率解耦
功率传输极限
系统负荷变化
小信号稳定
virtual impedance
power decoupling
power transmission limit
system load change
small signal stability
