Book ChapterDOI
Equal Load Sharing in DC Microgrid Using Line Resistance Estimation
Shivam Chaturvedi,Deepak Fulwani +1 more
- pp 87-96
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TLDR
To eliminate unequal power sharing estimation of the value of resistance of interconnecting cable is done by local voltage and current values of a converter, which improves voltage at the DC bus and also leads to equal load sharing among converters.Abstract:
The objective of this work is to achieve equal load sharing among parallel-connected converters by estimating the line resistance. Difference in line resistance leads to unequal power sharing in parallel-connected converters. Unequal load sharing is eliminated by droop control method. However, voltage regulation at the DC bus puts a limit on value of droop constant. To eliminate unequal power sharing estimation of the value of resistance of interconnecting cable is done by local voltage and current values of a converter. The estimated value is used to adjust the voltage reference so as to compensate the voltage drop on the connecting cable. This improves voltage at the DC bus and also leads to equal load sharing among converters. The proposed method has been validated through simulation of three parallel-connected boost converters.read more
References
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Journal ArticleDOI
Hierarchical Structure of Microgrids Control System
Ali Bidram,Ali Davoudi +1 more
TL;DR: This paper reviews the status of hierarchical control strategies applied to microgrids and discusses the future trends.
Journal ArticleDOI
Centralized Control for Optimizing Microgrids Operation
TL;DR: The controller aims to optimize the operation of the microgrid during interconnected operation, i.e., maximize its value by optimizing the production of the local DGs and power exchanges with the main distribution grid.
Journal ArticleDOI
An Improved Droop Control Method for DC Microgrids Based on Low Bandwidth Communication With DC Bus Voltage Restoration and Enhanced Current Sharing Accuracy
TL;DR: In this article, a lowbandwidth communication (LBC)-based improved droop control method is proposed to improve the performance of the dc microgrid operation, which does not require a centralized secondary controller.
Journal ArticleDOI
Distributed Cooperative Control of DC Microgrids
TL;DR: In this paper, a cooperative control paradigm is used to establish a distributed secondary/primary control framework for dc microgrids, where the conventional secondary control, that adjusts the voltage set point for the local droop mechanism, is replaced by a voltage regulator and a current regulator.
Journal ArticleDOI
Dynamic Behavior and Stabilization of DC Microgrids With Instantaneous Constant-Power Loads
TL;DR: In this article, stability issues in dc microgrids with instantaneous constant-power loads (CPLs) are explored and mitigation strategies such as load shedding, adding resistive loads, filters, or energy storage directly connected to the main bus, and control methods are investigated.
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