A Modified Droop Control Algorithm for DC Microgrids to Achieve Accurate Current Sharing and Improved Voltage Regulation

2021 ◽  
Author(s):  
Shrivatsal Sharma ◽  
Vishnu Mahadeva Iyer ◽  
Partha Pratim Das ◽  
Subhashish Bhattacharya
Keyword(s):  
Control Algorithm ◽  
Voltage Regulation ◽  
Droop Control ◽  
Dc Microgrids ◽  
Current Sharing

scholarly journals The Hierarchical Control Algorithm for DC Microgrid Based on the Improved Droop Control of Fuzzy Logic

Energies ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2995 ◽  
Author(s):  
Liang Zhang ◽  
Kang Chen ◽  
Shengbin Chi ◽  
Ling Lyu ◽  
Guowei Cai
Keyword(s):  
Fuzzy Logic ◽  
Control Algorithm ◽  
Voltage Drop ◽  
Hierarchical Control ◽  
Voltage Regulation ◽  
Droop Control ◽  
Dc Microgrid ◽  
Current Sharing ◽  
The Difference ◽  
Bus Voltage

In the direct current (DC) microgrid composed of multiple distributed generations, due to the different distances between various converters and the DC bus in the system, the difference of the line resistance will reduce the current sharing accuracy of the system. The droop control was widely used in the operation control of the DC microgrid. It was necessary to select a large droop coefficient to improve the current sharing accuracy, but a too large droop coefficient will lead to a serious bus voltage drop and affect the power quality. In view of the contradiction between the voltage regulation and load current sharing in the traditional droop control, a hierarchical control algorithm based on the improved droop control of the fuzzy logic was proposed in this paper. By improving the droop curve, the problems of voltage regulation and current sharing were solved simultaneously. The effectiveness of the algorithm was verified by simulation.

scholarly journals Voltage Regulation and Current Sharing in DC Microgrids With Different Information Scenarios

2021 ◽  
pp. 1-15
Author(s):  
Alessio Iovine ◽  
Miguel Jimenez Carrizosa ◽  
Elena De Santis ◽  
Maria Domenica Di Benedetto ◽  
Pierdomenico Pepe ◽  
...  
Keyword(s):  
Voltage Regulation ◽  
Dc Microgrids ◽  
Current Sharing

scholarly journals Decentralized Voltage Regulation in Islanded DC Microgrids Based on a Modified Droop Control using Superimposed AC Voltage

2021 ◽  
Author(s):  
Mohammadreza Nabatirad ◽  
Reza Razzaghi ◽  
Behrooz Bahrani
Keyword(s):  
Control System ◽  
Load Sharing ◽  
Voltage Regulation ◽  
Control Technique ◽  
Droop Control ◽  
Dc Microgrids ◽  
Distributed Generator ◽  
Voltage Compensation ◽  
Terminal Voltage ◽  
Unit Output

The conventional droop control is a widely-used technique in load sharing among Distributed Generator (DG) units in islanded DC Microgrids (MGs). This method provides Plug-and-Play (PnP) capability for DG units; however, poor load sharing accuracy and unregulated voltage are two shortcomings of that. This article proposes a novel control system in islanded DC MGs to provide simultaneous regulated voltage and accurate load sharing. The method utilizes a modified droop control technique in a decentralized manner. The proposed control system injects a superimposed AC voltage to the network that carries a frequency proportional to the master DG unit output current. The injected voltage adjusts an added a term to the conventional droop control named as the voltage compensation term in order to cancel voltage changes. This term adjusts terminal voltage of DG units proportional to the frequency of the superimposed AC voltage. The performance of the proposed control system is validated via a set of simulation studies using PLECS, and the experimental results confirm the viability and feasibility of the proposed control system.

A containment based distributed finite-time controller for bounded voltage regulation & proportionate current sharing in DC microgrids

2018 ◽  
Vol 228 ◽  
pp. 2526-2538 ◽  
Author(s):  
Subham Sahoo ◽  
Deepak Pullaguram ◽  
Sukumar Mishra ◽  
Jianzhong Wu ◽  
Nilanjan Senroy
Keyword(s):  
Finite Time ◽  
Voltage Regulation ◽  
Dc Microgrids ◽  
Current Sharing

scholarly journals Sliding Modes for Voltage Regulation and Current Sharing in DC Microgrids

2018 ◽  
Author(s):  
Sebastian Trip ◽  
Michele Cucuzzella ◽  
Claudio De Persis ◽  
Xiaodong Cheng ◽  
Antonella Ferrara
Keyword(s):  
Voltage Regulation ◽  
Sliding Modes ◽  
Dc Microgrids ◽  
Current Sharing
Sign in / Sign up

Export Citation Format

Share Document