scholarly journals DC bus voltage control strategy based on hybrid energy storage

2020 ◽  
Vol 440 ◽  
pp. 032032
Author(s):  
Saiyu Xu ◽  
Yingmin Yan
Keyword(s):  
Energy Storage ◽  
Control Strategy ◽  
Voltage Control ◽  
Voltage Control Strategy ◽  
Hybrid Energy ◽  
Hybrid Energy Storage ◽  
Dc Bus ◽  
Bus Voltage

scholarly journals A control strategy for battery/supercapacitor hybrid energy storage system

2021 ◽  
Vol 2108 (1) ◽  
pp. 012091
Author(s):  
Congzhen Xie ◽  
Jigang Wang ◽  
Bing Luo ◽  
Xiaolin Li ◽  
Lei Ja
Keyword(s):  
Energy Storage ◽  
Control Strategy ◽  
Renewable Energy Sources ◽  
Storage System ◽  
Energy Storage System ◽  
Hybrid Energy ◽  
Hybrid Energy Storage ◽  
Hybrid Energy Storage System ◽  
Dc Bus ◽  
Bus Voltage

Abstract In DC microgrid (MG), the hybrid energy storage system (HESS) of battery and supercapacitor (SC) has the important function of buffering power impact, which comes from renewable energy sources (RES) and loads. This paper proposes a HESS control strategy with DC bus voltage self-recovery function. High and low frequency power decomposition based on virtual droop control, and DC bus drop voltage is compensated by added proportional integral regulation. The relationship between DC bus voltage recovery and super-capacitor (SC) state of charge (SoC) recovery is analyzed. The system can realize stable energy storage, supply under frequent load power impact. The effectiveness of the proposed control strategy is verified by simulation in MATLAB/Simulink.

scholarly journals Research on Bus Voltage Control Strategy of Off-grid DC Microgrid

2020 ◽  
Vol 185 ◽  
pp. 01064
Author(s):  
Yilonɡ Kanɡ ◽  
Ningkang Zheng ◽  
Xiangyang Yan ◽  
Huanruo Qi ◽  
Kai Li
Keyword(s):  
Control Strategy ◽  
High Reliability ◽  
Voltage Control ◽  
Droop Control ◽  
Voltage Control Strategy ◽  
Dc Microgrid ◽  
Voltage Quality ◽  
Dc Bus ◽  
Bus Voltage

It is important to achieve stability of bus voltage in control of DC microgrids. In the DC microgrid, the traditional droop control method is usually adopted to stabilize the bus voltage for its high reliability and cost-effectiveness. However, line resistance will reduce the voltage quality of the DC bus in actual situations. In order to improve the voltage quality of the DC bus, a novel bus voltage control strategy based on modified droop characteristic is proposed. Finally, the simulation model of the off-grid DC microgrid with improved droop control strategy is built on PSCAD/EMTDC platform, and the results verify the effectiveness and feasibility of the proposed control strategy.

Based on the Hybrid Energy Storage System in the Application of Stable DC Bus Voltage

2014 ◽  
Vol 953-954 ◽  
pp. 765-770
Author(s):  
Yang Yang Wu ◽  
You Kuan Liu ◽  
Pei Tian
Keyword(s):  
Energy Storage ◽  
Storage System ◽  
Energy Storage System ◽  
Storage Unit ◽  
Hybrid Energy ◽  
Hybrid Energy Storage ◽  
Photovoltaic Array ◽  
Hybrid Energy Storage System ◽  
Dc Bus ◽  
Bus Voltage

Due to the large number of distributed power supply random connected to power grid, it has severely influenced on power quality of the grid. In the storage battery directly on the basis of the DC bus, adopting the method of hybrid energy storage system makes a research on the output characteristics of photovoltaic array and the charging and discharging of battery and super capacitor. Research results show that the hybrid energy storage system can take advantage of the DC/DC converter to coordinate photovoltaic array, energy storage unit and the energy flows among load, also that the stability of DC bus voltage can be ensured by the system switch from the different work patterns.

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