DC-Microgrid Voltage Regulation using Dual Active Bridge based SVR

2021 ◽  
Author(s):  
Abrar Ahmed Chhipa ◽  
Vinod Kumar
Keyword(s):  
Voltage Regulation ◽  
Dc Microgrid ◽  
Dual Active Bridge

scholarly journals Bidirectional Power Sharing for DC Microgrid Enabled by Dual Active Bridge DC-DC Converter

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 404
Author(s):  
Sara J. Ríos ◽  
Daniel J. Pagano ◽  
Kevin E. Lucas
Keyword(s):  
Power Management ◽  
Distribution Systems ◽  
Control Method ◽  
Dynamic Performance ◽  
Management Control ◽  
Photovoltaic System ◽  
Dc Microgrid ◽  
Dual Active Bridge ◽  
Control Scheme ◽  
Bidirectional Power Flow

Currently, high-performance power conversion requirements are of increasing interest in microgrid applications. In fact, isolated bidirectional dc-dc converters are widely used in modern dc distribution systems. The dual active bridge (DAB) dc-dc converter is identified as one of the most promising converter topology for the mentioned applications, due to its benefits of high power density, electrical isolation, bidirectional power flow, zero-voltage switching, and symmetrical structure. This study presents a power management control scheme in order to ensure the power balance of a dc microgrid in stand-alone operation, where the renewable energy source (RES) and the battery energy storage (BES) unit are interfaced by DAB converters. The power management algorithm, as introduced in this work, selects the proper operation of the RES system and BES system, based on load/generation power and state-of-charge of the battery conditions. Moreover, a nonlinear robust control strategy is proposed when the DAB converters are in voltage-mode-control in order to enhance the dynamic performance and robustness of the common dc-bus voltage, in addition to overcoming the instability problems that are caused by constant power loads and the dynamic interactions of power electronic converters. The simulation platform is developed in MATLAB/Simulink, where a photovoltaic system and battery system are selected as the typical RES and BES, respectively. Assessments on the performance of the proposed control scheme are conducted. Comparisons with the other control method are also provided.

Voltage Regulation and Battery Stress-Reduction Strategy for DC microgrid

2021 ◽  
Author(s):  
Anjan Debnath ◽  
Temitayo O. Olowu ◽  
Sukanta Roy ◽  
Arif Sarwat
Keyword(s):  
Stress Reduction ◽  
Voltage Regulation ◽  
Dc Microgrid ◽  
Reduction Strategy

scholarly journals Coordinated Control System between Grid–VSC and a DC Microgrid with Hybrid Energy Storage System

Electronics ◽  
2021 ◽  
Vol 10 (21) ◽  
pp. 2699
Author(s):  
Miguel Montilla-DJesus ◽  
Édinson Franco-Mejía ◽  
Edwin Rivas Trujillo ◽  
José Luis Rodriguez-Amenedo ◽  
Santiago Arnaltes
Keyword(s):  
Control Strategy ◽  
Power Flow ◽  
Storage System ◽  
Coordinated Control ◽  
Energy Storage System ◽  
Voltage Regulation ◽  
Electrical Network ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Dc Microgrid

Direct current microgrids (DCMGs) are currently presented as an alternative solution for small systems that feed sensitive electrical loads into DC. According to the scientific literature, DCMG maintains good voltage regulation. However, when the system is in islanded mode, very pronounced voltage variations are presented, compromising the system’s ability to achieve reliable and stable energy management. Therefore, the authors propose a solution, connecting the electrical network through a grid-tied voltage source converter (GVSC) in order to reduce voltage variations. A coordinated control strategy between the DCMG and GVSC is proposed to regulate the DC voltage and find a stable power flow between the various active elements, which feed the load. The results show that the control strategy between the GVSC and DCMG, when tested under different disturbances, improves the performance of the system, making it more reliable and stable. Furthermore, the GVSC supports the AC voltage at the point of common coupling (PCC) without reducing the operating capacity of the DCMG and without exceeding even its most restrictive limit. All simulations were carried out in MATLAB 2020.

Flatness based control of a dual active bridge converter for DC microgrid

2013 ◽  
Author(s):  
Matheepot Phattanasak ◽  
Wattana Kaewmanee ◽  
Phatiphat Thounthong ◽  
Panarit Sethakul ◽  
Jean-Philippe Martin ◽  
...  
Keyword(s):  
Dc Microgrid ◽  
Dual Active Bridge

Predictive Control Based DC Microgrid Stabilization With the Dual Active Bridge Converter

2020 ◽  
Vol 67 (10) ◽  
pp. 8944-8956 ◽  
Author(s):  
Linglin Chen ◽  
Fei Gao ◽  
Ke Shen ◽  
Zhenyu Wang ◽  
Luca Tarisciotti ◽  
...  
Keyword(s):  
Predictive Control ◽  
Dc Microgrid ◽  
Dual Active Bridge

scholarly journals Robust Control Method for DC Microgrids and Energy Routers to Improve Voltage Stability in Energy Internet

Energies ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1622 ◽  
Author(s):  
Haochen Hua ◽  
Yuchao Qin ◽  
Hanxuan Xu ◽  
Chuantong Hao ◽  
Junwei Cao
Keyword(s):  
Power Transmission ◽  
Control Method ◽  
Voltage Regulation ◽  
Normal Operation ◽  
Local Network ◽  
Linear Matrix ◽  
Dc Microgrid ◽  
Voltage Stabilization ◽  
Energy Internet ◽  
Bus Voltage

The energy internet (EI) is a wide area power network that efficiently combines new energy technology and information technology, resulting in bidirectional on-demand power transmission and rational utilization of distributed energy resources (DERs). Since the stability of local network is a prerequisite for the normal operation of the entire EI, the direct current (DC) bus voltage stabilization for each individual DC microgrid (MG) is a core issue. In this paper, the dynamics of the EI system is modeled with a continuous stochastic system, which simultaneously considers related time-varying delays and norm-bounded modeling uncertainty. Meanwhile, the voltage stabilization issue is converted into a robust H ∞ control problem solved via a linear matrix inequality approach. To avoid the situation of over-control, constraints are set in controllers. The problem of finding a balance between voltage regulation performance and constraints for the controllers was also extensively investigated. Finally, the efficacy of the proposed methods is evaluated with numerical simulations.

scholarly journals On Bidirectional DC Nano-Grids: Design Considerations and an Architecture Proposal

Energies ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3715 ◽  
Author(s):  
Aitor Vazquez ◽  
Kevin Martin ◽  
Manuel Arias ◽  
Javier Sebastian
Keyword(s):  
Storage System ◽  
Electrical Power ◽  
Distribution Networks ◽  
Energy Storage System ◽  
Voltage Regulation ◽  
Power Converter ◽  
Buck Converters ◽  
Dual Active Bridge ◽  
Dc Distribution ◽  
Power Architecture

The use of DC distribution networks has several advantages, especially for energy saving and integration of energy storage system and renewable energies. In this regard, DC nano-grids are a very interesting solution when distributing electrical power in households. In this paper, an analysis about the possible bidirectional capability of this DC nano-grid is presented. The end-user can freely connect either a passive load (demanding power) or an active one (able to sink current to the grid). The analysis is divided into three different parts. First, a discussion about the most promising power architecture is addressed, taking into consideration the loads in a house. Second, a standard for voltage regulation in a bidirectional DC nano-grid is proposed. Finally, a possible bus provider for this particular bidirectional DC nano-grid is also addressed. This power converter is based on a Dual Active Bridge cascaded with five synchronous buck converters. The key design aspects of the proposed topology are analyzed to emphasize the particular constraints imposed by the standard and the power architecture. A 500 W, 380 V to 24 V bidirectional bus provider has been built in order to experimentally validate the standard proposal and the design aspects.

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