Design and Implementation of Autonomous Low Voltage DC Microgrid with Hierarchical Control

Muchande, Shrishell; Thale, Sushil

doi:10.1109/stpec49749.2020.9297748

Cited by 6 publications

(5 citation statements)

References 15 publications

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“…Power sharing among DERs is enabled by non-communication-based control techniques that use locally monitored bus voltages [14]. They have several advantages, including ease of installation, low cost, great modularity, flexibility, expandability, and reliability [15].…”

Section: Busmentioning

confidence: 99%

Adaptive Control Approach for Accurate Current Sharing and Voltage Regulation in DC Microgrid Applications

Mesbah,

Sayed,

Ahmed

et al. 2024

Energies

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A DC microgrid is an efficient way to combine diverse sources; conventional droop control is unable to achieve both accurate current sharing and required voltage regulation. This paper provides a new adaptive control approach for DC microgrid applications that satisfies both accurate current sharing and appropriate voltage regulation depending on the loading state. As the load increases in parallel, so do the output currents of the distributed generating units, and correct current sharing is necessary under severe load conditions. The suggested control approach raises the equivalent droop gains as the load level increases in parallel and provides accurate current sharing. The droop parameters were checked online and changed using the principal current sharing loops to reduce the variation in load current sharing, and the second loop also transferred the droop lines to eliminate DC microgrid bus voltage fluctuation in the adaptive droop controller, which is different and inventive. The proposed algorithm is tested using a variety of input voltages and load resistances. This work assesses the performance and stability of the suggested method using a linearized model and verifies the results using an acceptable model created in MATLAB/SIMULINK Software Version 9.3 and using Real-Time Simulation Fundamentals and hardware-based experimentation.

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Section: Busmentioning

confidence: 99%

Adaptive Control Approach for Accurate Current Sharing and Voltage Regulation in DC Microgrid Applications

Mesbah,

Sayed,

Ahmed

et al. 2024

Energies

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“…The hierarchical architecture was proposed for DC microgrid with reliable and optimum utilization of resources in [9,10]. Primary level control is embedded in Local Controllers (LCs) directly acting on power converters according to the references generated by the secondary level controller with faster dynamics.…”

Section: Imentioning

confidence: 99%

“…Figure 4 shows the power and control scheme implemented for various converters. The details of design of both VCM and CCM are given in [10]. The emulated fuel cell source is designed to be similar to a battery based source except the unidirectional boost converter instead of the BDC.…”

Section: A the Proposed Three Layer Hierarchical Controlmentioning

confidence: 99%

Hierarchical Control of a Low Voltage DC Microgrid with Coordinated Power Management Strategies

Muchande¹,

Thale²

2022

Eng. Technol. Appl. Sci. Res.

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A microgrid consists of a cluster of renewable energy sources, energy storage elements, and loads. One of the main objectives of a microgrid is to provide reliable and high-quality power to the loads. Under normal operating conditions, this is achieved through suitable Power Management Strategy (PMS). However, under emergency conditions, such as the failure of any source, overloads, or faults, the PMS may not be able to retain the microgrid in operating conditions. Any emergency condition may demand a significant change in control and coordination between various subsystems of the microgrid to survive and continue the operation. This feature makes a microgrid "a fault resilient" system as visualized in its objectives. This paper proposes a novel Coordinated Power Management (CPM) strategy based on three-layer hierarchical control for an autonomous Low Voltage DC (LVDC) microgrid. The proposed CPM strategy ensures the continuation of the microgrid operation under normal and emergency conditions. An emergency control layer is established to extend the microgrid operation during an emergency condition. The performance of the proposed control scheme is validated through simulation and experimental results.

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“…When compared with more modern buck-boost converter topologies, the traditional buck-boost converter could not perform as well [4]. The advantages of the traditional buckboost converter include its easy construction, costeffectiveness, and ability to achieve both voltage step-up and down, as well as features that are typical of more modern buck-boost converters [5].…”

Section: Introductionmentioning

confidence: 99%

A Distributed Architecture of Parallel Buck-Boost Converters and Cascaded Control of DC Microgrids-Real Time Implementation

Mesbah,

Sayed,

Ahmed

et al. 2024

IEEE Access

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To enhance the stability and reliability of the system, the converters' parallel operation can be cascaded to address the constraints posed by the substantial integration of renewable resources. Buckboost DC-DC converters are often controlled via a cascaded control approach to allow parallel operation. The converter's output current and its voltage will be controlled by nested loop control. This study proposes adaptive droop control parameters that are updated and verified online using the principal current sharing loops to minimize the fluctuation in load current sharing. When the converters in the microgrid are paralleled, load sharing will be accomplished using the droop control approach in addition to nested proportional-integral-based voltage and current control loops. To restore the correct voltage across the DC microgrid, an outer addition voltage secondary loop will be used, rectifying any voltage disparities caused by the droop management strategy. Several common load resistances and input voltage variations are used to test the suggested method. Using a linearized model, this work assesses the stability and performance of the proposed method. It then confirms the findings with an adequate model created in MATLAB/SIMULINK, Real-Time Simulation Fundamentals, and hardware-based experiments.

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Design and Implementation of Autonomous Low Voltage DC Microgrid with Hierarchical Control

Cited by 6 publications

References 15 publications

Adaptive Control Approach for Accurate Current Sharing and Voltage Regulation in DC Microgrid Applications

Adaptive Control Approach for Accurate Current Sharing and Voltage Regulation in DC Microgrid Applications

Hierarchical Control of a Low Voltage DC Microgrid with Coordinated Power Management Strategies

A Distributed Architecture of Parallel Buck-Boost Converters and Cascaded Control of DC Microgrids-Real Time Implementation

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