计及RoCoF的同步逆变器预同步控制及参数设计  

Pre-synchronization control and parameter design of synchronverter considering RoCoF

作　　者：颜湘武[1] 马宏斌 王晨光[1] 张世峥 Yan Xiangwu;Ma Hongbin;Wang Chenguang;Zhang Shizheng(Key Laboratory of Distributed Energy Storage and Microgrid of Hebei Province North China Electric Power University,Baoding 071003,China)

机构地区：[1]华北电力大学河北省分布式储能与微网重点实验室,河北保定071003

出　　处：《可再生能源》2022年第8期1097-1104,共8页Renewable Energy Resources

基　　金：北京市自然科学基金面上项目(3212037);河北省自然科学基金项目(E20185021134);国家电网公司总部科技项目(SGHEDK00DYJS1900061)。

摘　　要：同步逆变器采用虚拟同步机控制后,提高了分布式电源对电网的支撑作用,但在并离网双模式动态调节过程中,同步逆变器可能产生过大的频率偏差及频率变化率,文章提出一种计及RoCoF的同步逆变器预同步控制及参数设计方法。首先,以虚拟功率预同步控制结构为例,分析其实现相位预同步的工作原理及方法,建立预同步控制的小信号模型;其次,借鉴IEEEStandard 154号电网同步过程标准,实现预同步控制参数的设计;最后,通过搭建仿真平台,验证预同步控制及设计参数的有效性。结果表明,文章所提的预同步控制方案可快速有效地实现同步逆变器的预同步并网过程,并且设计参数满足频率偏差及频率变化率要求。The synchronverter controlled by virtual synchronous generator improves the supporting effect of distributed generation on power grid,but it may produce excessive frequency deviation and the rate of change of frequency(RoCoF)in the process of parallel/off grid dual-mode dynamic regulation.Therefore,a method of pre-synchronization control and parameter design of synchronverter considering RoCoF is proposed in this paper.Firstly,taking the virtual power pre-synchronization control structure as an example,this paper analyzes the working principle and method of phase pre-synchronization,and establishes the small signal model of pre-synchronization control.Secondly,according to IEEE standard 154,the pre-synchronization control parameters are designed.Finally,a simulation platform is built to verify the effectiveness of pre-synchronization control and design parameters.The results show that the pre-synchronization control scheme proposed in this paper can realize the pre-synchronization grid connection operation of synchronverter,and the designed parameters meet the re-quirements of frequency deviation and RoCoF.

关 键 词：同步逆变器 预同步控制 虚拟功率 小信号模型 频率变化率 

分 类 号：TK51[动力工程及工程热物理—热能工程] TK81