Research on Flexible Virtual Inertia Control Method Based on the Small Signal Model of DC Microgrid

被引：4
|
作者：
Lu, Shengyang [1 ,2 ]
Yu, Tongwei [2 ]
Liu, Huiwen [3 ]
Zhang, Wuyang [2 ]
Sui, Yuqiu [1 ]
Yang, Junyou [1 ]
Zhang, Li [3 ]
Zhou, Jiaxu [2 ]
Wang, Haixin [1 ]
机构：
[1] Shenyang Univ Technol, Sch Elect Engn, Shenyang 110870, Peoples R China
[2] Elect Power Res Inst State Grid Liaoning Elect Po, Shenyang 110006, Peoples R China
[3] Dalian Univ Technol, Sch Elect Engn, Dalian 116024, Peoples R China
来源：
ENERGIES | 2022年 / 15卷 / 22期
关键词：
DC microgrid; small-signal model; flexible virtual inertia control (FVI); stability analysis; constant power load (CPL); SYNCHRONOUS GENERATOR; SYSTEMS;
D O I：
10.3390/en15228360
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Renewable energy is usually connected to the DC micro-grid by a large number of power electronic devices, which have the advantages of a fast system response, but the disadvantage to reduce the inertia of the system, which makes the stability of the system worse. It is necessary to increase the inertia of DC micro-grid so that it can recover and stabilize well when it receives a disturbance. In this paper, a small-signal model of DC micro-grid with constant power load (CPL) is established, and a flexible virtual inertial (FVI) control method based on DC bus voltage real-time variation is proposed, by controlling the DC/DC converter of the energy storage system, the problem of system oscillation caused by introducing voltage differential link to the system is solved. Compared with the droop control method, the FVI control method can increase the inertia of DC micro-grid system, reduce the influence of small disturbances, and improve the stability of the system. Finally, the validity of the FVI control method based on small signal model is verified in dSPACE.
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页数：14
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