scholarly journals Constant Frequency Control Strategy of Microgrids by Coordinating Energy Router and Energy Storage System

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Zheng Lan ◽  
Junzhang Wang ◽  
Jinhui Zeng ◽  
Dong He ◽  
Fan Xiao ◽  
...  
Keyword(s):  
Energy Storage ◽  
Control Strategy ◽  
Frequency Control ◽  
Storage System ◽  
Energy Storage System ◽  
Maximum Efficiency ◽  
Stable Operation ◽  
Power Fluctuation ◽  
Constant Frequency ◽  
The Stability

In this paper, a constant frequency control strategy of a microgrid by coordinating energy router (ER) and energy storage system is proposed to solve the frequency fluctuation problem of microgrid, in which ER is the core of the energy management system. The interface converter of ER connected to the microgrid adopts the virtual synchronous generator (VSG) control, which adjusts the mechanical reference power in real time according to the state of charge (SOC) of the energy storage. The energy storage system adopts constant voltage and constant frequency (V/F) control to maintain the frequency and voltage stability of microgrid. The energy storage system with fast charge and discharge responds to the power fluctuation of the microgrid. ER maintains the stability of the energy storage capacity through bidirectional power regulation. When the energy storage system fails, the frequency and voltage droop characteristics of ER controlled by VSG will play a role in maintaining the stable operation of the microgrid. By the coordinating control strategy, the maximum efficiency of intermittent distributed energy can be guaranteed, and the stability, reliability, and grid-connection friendliness of the microgrid operation can be improved. Simulation results prove the effectiveness of the proposed control strategy.

scholarly journals A Capacity Configuration Control Strategy to Alleviate Power Fluctuation of Hybrid Energy Storage System Based on Improved Particle Swarm Optimization

Energies ◽  
2019 ◽  
Vol 12 (4) ◽  
pp. 642 ◽  
Author(s):  
Tiezhou Wu ◽  
Xiao Shi ◽  
Li Liao ◽  
Chuanjian Zhou ◽  
Hang Zhou ◽  
...  
Keyword(s):  
Energy Storage ◽  
Objective Function ◽  
Control Strategy ◽  
Storage System ◽  
Particle Swarm ◽  
Energy Storage System ◽  
Power Fluctuation ◽  
Hybrid Energy ◽  
Hybrid Energy Storage ◽  
Hybrid Energy Storage System

In view of optimizing the configuration of each unit’s capacity for energy storage in the microgrid system, in order to ensure that the planned energy storage capacity can meet the reasonable operation of the microgrid’s control strategy, the power fluctuations during the grid-connected operation of the microgrid are considered in the planning and The economic benefit of hybrid energy storage is quantified. A multi-objective function aiming at minimizing the power fluctuation on the DC bus in the microgrid and optimizing the capacity ratio of each energy storage system in the hybrid energy storage system (HESS) is established. The improved particle swarm algorithm (PSO) is used to solve the objective function, and the solution is applied to the microgrid experimental platform. By comparing the power fluctuations of the battery and the supercapacitor in the HESS, the power distribution is directly reflected. Comparing with the traditional mixed energy storage control strategy, it shows that the optimized hybrid energy storage control strategy can save 4.3% of the cost compared with the traditional hybrid energy storage control strategy, and the performance of the power fluctuation of the renewable energy is also improved. It proves that the proposed capacity configuration of the HESS has certain theoretical significance and practical application value.

Micro-Grid System Based on Compressed Air Energy Storage

2014 ◽  
Vol 945-949 ◽  
pp. 2841-2845
Author(s):  
Yu Jie Liu ◽  
Wei Hua Li ◽  
Xiang Hua Luo ◽  
Cheng Su ◽  
Shi Xue Ding ◽  
...  
Keyword(s):  
Energy Storage ◽  
Storage System ◽  
Wind Farms ◽  
Energy Storage System ◽  
Compressed Air ◽  
Grid System ◽  
Compressed Air Energy Storage ◽  
Power Fluctuation ◽  
Micro Grid ◽  
The Stability

With the development of the power system, wind energy was applied to micro-grid system as a distributed generation. The output of the wind farms has the characteristic of intermittence and fluctuation, which would influent the stability of micro-grid system and can be solved effectively by compressed air energy storage system, a new energy storage technology. Because of the advantage of fast response, high economic performance and small environmental impacts, it has an extensive application prospect. This paper builds a micro-grid system with wind power generator, and control the output of micro-grid system by using compressed air energy storage system. The simulation result verifies that the compressed-air energy storage system can effectively suppress power fluctuation and improving the stability of the micro-grid system.

Research on Dual-Mode Control Strategy of Energy Storage System in Microgrid

2014 ◽  
Vol 1070-1072 ◽  
pp. 1312-1317
Author(s):  
Guan Jun Li ◽  
Bing Yu Sang ◽  
Yu Zhang
Keyword(s):  
Energy Storage ◽  
Control Strategy ◽  
Storage System ◽  
Energy Storage System ◽  
Simulation System ◽  
Stable Operation ◽  
Dual Mode ◽  
Time Simulation ◽  
Research Platform ◽  
New Energy

As wind power, solar and other new energy development, new energy itself has intermittent, fluctuation characteristics, which bring great challenges to the safe and stable operation of power grid. This paper will construct semi real object simulation system research platform with the RTDS real-time simulation system, storage controller, power amplifiers and other equipment, focus on control strategy of energy storage system in a Micro Grid, mainly grid PQ control, off-grid V / F control and two conditions of each conversion control technology.

Sign in / Sign up

Export Citation Format

Share Document