Energy management techniques to enhance DC-bus voltage transient stability and power balancing issues for islanded DC microgrids

2021 ◽  
pp. 349-375
Author(s):  
Subarto Kumar Ghosh ◽  
Tushar Kanti Roy ◽  
Md. Abu Hanif Pramanik ◽  
Md. Sawkat Ali
Keyword(s):  
Energy Management ◽  
Transient Stability ◽  
Dc Microgrids ◽  
Voltage Transient ◽  
Management Techniques ◽  
Dc Bus ◽  
Bus Voltage ◽  
Power Balancing

scholarly journals A Novel Energy Management Control technique for PV-Battery System in DC Microgrids

2021 ◽  
Author(s):  
Hadis Hajebrahimi ◽  
Sajjad Makhdoomi Kaviri ◽  
Suzan Eren ◽  
Alireza Bakhshai
Keyword(s):  
Energy Management ◽  
Control Method ◽  
Management Control ◽  
Control Technique ◽  
Battery System ◽  
Dc Microgrids ◽  
Adaptive Parameters ◽  
New Energy ◽  
Dc Bus ◽  
Bus Voltage

This paper presents a new energy management control technique for PV-Battery system used in DC microgrids. The proposed control technique is performed based on a droop control algorithm that maintains DC-bus voltage in a desirable and required range adaptively. Tightly Regulating the bus voltage In the islanded mode of operation is very challenging. However, the proposed control method by introducing a nonlinear droop profile with four adaptive parameters shows its superiority. Adaptive parameters determined by the non-linear optimal algorithms. Tightly regulating the DC bus voltage during extensive changes in demand loads/sources within a DC Micro Grid is the responsibility of the adaptive parameters. Stability of the proposed method in the whole system for a very broad range of operating conditions are proved. Simulation results along with the experimental results verify the feasibility of the proposed approach while demonstrate its superior performance compared to the conventional control method.

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.

Power balancing in islanded microgrids by using a dc-bus voltage reference

SPEEDAM 2010 ◽  
2010 ◽  
Author(s):  
Tine L. Vando ◽  
Bert Renders ◽  
Lieven Degroote ◽  
Bart Meersman ◽  
Lieven Vandevelde
Keyword(s):  
Voltage Reference ◽  
Dc Bus ◽  
Bus Voltage ◽  
Power Balancing

scholarly journals Coordination Control and Energy Management of Standalone Hybrid AC/DC Microgrid

2021 ◽  
Author(s):  
Ritu Kandari ◽  
◽  
Pankaj Gupta ◽  
Ashwani Kumar ◽  
◽  
...  
Keyword(s):  
Control System ◽  
Energy Management ◽  
Secondary Source ◽  
Coordination Control ◽  
Super Capacitor ◽  
Dc Microgrid ◽  
Efficient Energy ◽  
Voltage Deviation ◽  
Dc Bus ◽  
Bus Voltage

An efficient energy management scheme for a standalone hybrid AC/DC microgrid (HMG) has been proposed in this paper. Energy management in a microgrid is a challenging task, because of the involvement of the distributed energy resources (DERs) which are intermittent in nature. The microgrid may therefore, undergo mismatch in demand and supply, when either the generation or load varies. This mismatch in power may result into DC bus voltage deviations and sometimes these deviations may be out of the permissible limits. A coordination control-based strategy (CCS) for DC bus voltage deviation mitigation and efficient energy management of the standalone microgrid is investigated here. The CCS is tested with the help of simulation studies on a test hybrid AC/DC microgrid in MATLAB covering all the scenarios which may arise. The test microgrid consists of a solar photovoltaic (PV) generation, a secondary source of generation, PEM fuel cell, a battery and a super capacitor. Coordination between the various sub-units and energy management of hybrid AC/DC microgrid is done using Fuzzy Logic Control (FLC) and the DC bus voltage deviations are also compared with PI based control system. It is found that the system with FLC has better performance than PI based control system.

scholarly journals Development of Wind IPMSG Based Bipolar DC Microgrids

2021 ◽  
Vol 03 (02) ◽  
pp. 1-1
Author(s):  
Xiang-Yu Sun ◽  
◽  
Ping-Hong Jhou ◽  
Min-Ze Lu ◽  
Chang-Ming Liaw ◽  
...  
Keyword(s):  
Synchronous Generator ◽  
Voltage Balancing ◽  
Dc Microgrids ◽  
Three Phase ◽  
Switch Mode ◽  
Interior Permanent Magnet ◽  
Dc Bus ◽  
Bus Voltage ◽  
Balancing Control ◽  
Power Component

This paper presents the development of a wind Interior Permanent-Magnet Synchronous Generator (IPMSG) based bipolar DC microgrids along with various switch-mode rectifiers. Firstly, the wind IPMSG is established and adequately controlled to possess satisfactory generating characteristics during different driven speeds and loads. Later, the boost switch-mode rectifier (SMR) based bipolar DC bus is established. Further, three-phase single-switch (3P1SW) boost SMR, three-phase two-switch (3P2SW) three-level boost SMR, and a three-phase three-switch (3P3SW) Vienna SMR are comparatively evaluated. Along with the proposed robust voltage and current controls, a well-regulated microgrid DC-bus voltage is established. Moreover, the voltage balancing control is proposed to minimize the imbalance in the bipolar DC-bus voltage. For the wind IPMSG having Vienna SMR, the commutation angle setting is adjusted to use the reluctance power component effectively.

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