An Enhanced Drop Control Method for DC Microgrids with Accurate Current Sharing and DC Bus Voltage Restoration

2019 ◽  
Author(s):  
Weiming Jiang ◽  
Jinbin Zhao ◽  
Keqing Qu ◽  
Ling Mao ◽  
Yuxin Zhu ◽  
...  
Keyword(s):  
Control Method ◽  
Dc Microgrids ◽  
Current Sharing ◽  
Dc Bus ◽  
Bus Voltage

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 Capacity Limitation Control of Multiple Bi-directional DC-DC Converters for Micro Grid Application

2015 ◽  
Vol 2 (1) ◽  
pp. 61 ◽  
Author(s):  
S. J. Chiang ◽  
Yu-Min Liao ◽  
Ke-Chih Liu
Keyword(s):  
Power Management ◽  
Control Method ◽  
Droop Control ◽  
Control Methods ◽  
Power Capacity ◽  
Capacity Limitation ◽  
Current Sharing ◽  
Parallel Control ◽  
Micro Grid ◽  
Bus Voltage

The micro grid system requires battery for energy storage and power management. In which, the bi-directional DC to DC converter is the key component for maintaining the DC bus voltage and controlling the charge and discharge of the battery with or without grid support. Parallel control of multiple DC to DC converters is a critical technique to enlarge the power capacity. This paper presents two capacity limitation control methods that multiple DC to DC converters can be paralleled with distributed battery banks. The first method is the capacity limitation control with cascaded load current sense needing no control interconnection. The second method is the capacity limitation control with master-slave and cascaded current command limitation. Two methods are presented to solve the limitation of droop control method and active current sharing method respectively, and can be extended without converter number limitation theoretically. Three prototype 240W bidirectional half-bridge DC to DC converters are built and paralleled in this paper. The proposed method is confirmed with some measured results.

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