scholarly journals Design and Implementation of an Energy-Management System for a Grid-Connected Residential DC Microgrid

Energies ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 4074
Author(s):  
Alfredo Padilla-Medina ◽  
Francisco Perez-Pinal ◽  
Alonso Jimenez-Garibay ◽  
Antonio Vazquez-Lopez ◽  
Juan Martinez-Nolasco
Keyword(s):  
Energy Management ◽  
Management System ◽  
Operation Mode ◽  
Maximum Energy ◽  
Energy Management System ◽  
Dc Microgrid ◽  
Design And Implementation ◽  
Operation Modes ◽  
Dc Bus ◽  
Bus Voltage

The design and implementation of an energy-management system (EMS) applied to a residential direct current microgrid (DC-µG) is presented in this work. The proposed residential DC-µG is designed to provide a maximum power of one kilowatt by using two photovoltaic arrays (PAs) of 500 W, a battery bank (BB) of 120 V–115 Ah, a supercapacitor module of 0.230 F and a bidirectional DC–AC converter linked to the AC main grid (MG). The EMS works as a centralized manager and it defines the working operation mode for each section of the DC-µG. The operation modes are based on: (1) the DC-link bus voltage, (2) the generated or demanded power to each section of the DC-µG and (3) the BB’s state of charge. The proposed EMS—during the several working operation modes and at the same time—can obtain the maximum energy from the PAs, reduce the energy consumption from the main grid and keep the DC-link bus voltage inside a range of 190 V ± 5%. The EMS and local controllers are implemented by using LabVIEW and NI myRIO-1900 platforms. Moreover, experimental results during connection and disconnection of each DC-µG sections and different on-the-fly transitions are reported, these results focus on the behavior of the DC bus, which shows the DC bus robustness and stability. The robustness of the DC-µG is demonstrated by maintaining a balance of energy between the sources and loads connected to the DC bus under different scenarios.

scholarly journals Energy Management System of DC Microgrid in Grid-Connected and Stand-Alone Modes: Control, Operation and Experimental Validation

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 581
Author(s):  
Hoon Lee ◽  
Jin-Wook Kang ◽  
Bong-Yeon Choi ◽  
Kyung-Min Kang ◽  
Mi-Na Kim ◽  
...  
Keyword(s):  
Energy Management ◽  
Management System ◽  
Experimental Validation ◽  
Storage System ◽  
Operation Mode ◽  
Energy Storage System ◽  
State Of Charge ◽  
Energy Management System ◽  
Dc Microgrid ◽  
Power Load

This paper proposes an energy management system (EMS) of direct current (DC) microgrid. In order to implement the proposed EMS, the control and operation method of EMS is presented in this work. While most of the studies have individually examined the grid-connected mode used in building and the stand-alone operation mode applicable to the island, the proposed EMS allows it to be used in both grid-connected mode and stand-alone mode with 10 modes. In order to determine each mode in EMS, not only the amount of generated power, load power, and the state of charge (SOC) of the battery, but also the rated power of the energy storage system (ESS) converter that performs charging and discharging operations is additionally considered. Thus, various uncertainties that may occur in the actual DC microgrid environment can be improved. A laboratory-scale DC microgrid is fabricated to conduct experimental validation of proposed EMS. Experiments of DC microgrid with proposed EMS were performed for each mode, and the experiment waveforms of each power conversion device are included in detail.

Design and Implementation of Energy Management System for Energy Hub in Smart Grid

2013 ◽  
Vol 12 (18) ◽  
pp. 4797-4804 ◽  
Author(s):  
Wei Pei ◽  
Wei Deng ◽  
Ziqi Shen ◽  
Zhenxing Zhao ◽  
Jiarui Wang
Keyword(s):  
Smart Grid ◽  
Energy Management ◽  
Management System ◽  
Energy Management System ◽  
Energy Hub ◽  
Design And Implementation

scholarly journals Real Time Energy Management System for Smart Buildings to Minimize the Electricity Bill

2017 ◽  
Vol 18 (3) ◽  
Author(s):  
R. K. Chauhan ◽  
B. S. Rajpurohit ◽  
L. Wang ◽  
F. M. Gonzalez Longatt ◽  
S. N. Singh
Keyword(s):  
Real Time ◽  
Energy Management ◽  
Management System ◽  
Scheduling Algorithm ◽  
Electricity Price ◽  
Public Utility ◽  
Energy Management System ◽  
Dc Microgrid ◽  
Load Scheduling ◽  
Cost Of Energy

AbstractThis paper presents a real time price based energy management system for DC microgrid. The DC distribution system is considered as a prospective system according to the increase of DC loads and DC output type distribution energy resources (DERs) such as photovoltaic (PV) systems, battery bank (BB), and hybrid car (HC). The control objective is to achieve the optimal cost of energy. The proposed control scheme is developed based on the source as well as load scheduling of the DC microgrid. The source scheduling algorithm is based on the selection of cheapest power source to supply the load of DC microgrid and achieve the optimal electricity price. The BB and HC charges in regular hours at the less electricity price to supply the future load during the higher electricity price of the public utility. The load scheduling algorithm shifts the deferrable load of the building from peak hours to the regular hours to obtain the lowest cost of energy for the building. The proposed scheme significantly decreases the peak demand, which is the main cause of load shedding. Dynamic simulation is presented to access the control performance with price fluctuations and robustness of the system.

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