摘要
构建基于钒流电池储能的虚拟同步发电机(VSG),使微电网具有同步发电机惯量大、输出阻抗大等特性。采用同步发电机5阶方程作为VSG本体模型,双向Buck-Boost变换器作为连接钒流电池储能装置与VSG的桥梁,在调频单元中加入2次调频及对转动惯量和阻尼值的合理设置,可以省去传统的预同步单元,在4象限内准确地跟踪有功和无功功率,实现VSG离网到并网平滑切换。
Virtual synchronous generator(VSG)based on vanadium redox flow battery energy storage isconstructed and it has the characteristics of large inertia and high impedance. Using five-order equation ofsynchronous generator as the ontology model of VSG and Buck-Boost converter as the connection bridge betweenVRB and VSG. Through improving the frequency unit and choosing reasonable moment of inertia and dampingcoefficient,it omits traditional pre-synchronization unit and can switch smoothly from island mode to grid-connectedmode,then it accurately tracks the active power and reactive power under the four quadrants and realizes thebi-directional flow of power.
作者
贺大为
张辉
王亚楠
魏亚龙
苏冰
李晓强
HE Dawei;ZHANG Hui;WANG Yanan;WEI Yalong;SU Bing;LI Xiaoqiang(College of Automation and Information Engineering,Xi’an University of Technology,Xi’an 710048,Shaanxi,China;State Key Lab. of Power System,Tsinghua University,Beijing 100084,China)
出处
《电气传动》
北大核心
2016年第9期48-52,共5页
Electric Drive
基金
国家自然科学基金(51277150/51307140)
陕西省工业攻关(2013K07-05)
陕西省教育厅产业化培育(14JF020)
清华大学电力系统国家重点实验室开放课题(SKLD16KZ01)
关键词
钒流电池
虚拟同步发电机
小信号模型
平滑切换
双向Buck-Boost变换器
vanadium redox flow battery(VRB)
virtual synchronous generator(VSG)
small signal model
smooth switching
bi-directional Buck-Boost converter
