Coordinated Control Strategy of New Energy Power Generation System with Hybrid Energy Storage Unit  

作　　者：Yun Zhang Zifen Han Biao Tian Ning Chen Yi Fan 

机构地区：[1]School of Mechano-Electronic Engineering,Xidian University,Xi’an,710071,China [2]Electric Power Control Center,State Grid Gansu Electric Power Company,Lanzhou,730030,China [3]Electric Power Control Center,State Grid Gansu Electric Power Company Zhangye Power Supply Branch,Zhangye,734000,China

出　　处：《Energy Engineering》2025年第1期167-184,共18页能源工程（英文）

基　　金：supported by the State Grid Corporation of China Science and Technology Project,grant number 52270723000900K.

摘　　要：The new energy power generation is becoming increasingly important in the power system.Such as photovoltaic power generation has become a research hotspot,however,due to the characteristics of light radiation changes,photovoltaic power generation is unstable and random,resulting in a low utilization rate and directly affecting the stability of the power grid.To solve this problem,this paper proposes a coordinated control strategy for a newenergy power generation system with a hybrid energy storage unit based on the lithium iron phosphate-supercapacitor hybrid energy storage unit.Firstly,the variational mode decomposition algorithm is used to separate the high and low frequencies of the power signal,which is conducive to the rapid and accurate suppression of the power fluctuation of the energy storage system.Secondly,the fuzzy control algorithm is introduced to balance the power between energy storage.In this paper,the actual data is used for simulation,and the simulation results show that the strategy realizes the effective suppression of the bus voltage fluctuation and the accurate control of the internal state of the energy storage unit,effectively avoiding problems such as overshoot and over-discharge,and can significantly improve the stability of the photovoltaic power generation systemand the stability of the Direct Current bus.It is of great significance to promote the development of collaborative control technology for photovoltaic hybrid energy storage units.

关 键 词：Photovoltaic power suppression hybrid energy storage unit variationalmodal decomposition fuzzy control power distribution control 

分 类 号：TM614[电气工程—电力系统及自动化]