Control Hardware-in-the-Loop Demonstration of a Building-Scale DC Microgrid Utilizing Distributed Control Algorithm

Mobarrez, Maziar; Ghanbari, Niloofar; Bhattacharya, Subhashish

doi:10.1109/pesgm.2018.8586602

Cited by 19 publications

(8 citation statements)

References 8 publications

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“…In each area, PV panels, loads, and the storage system, as the main components, were connected through the converters and breakers. the PV boost converter used a Maximum Power Point-Tracking-Incremental Conductance (MPPT-IC) Algorithm to track the maximum power point and deliver the maximum available power of the PV [18,19]. The feedback PI controller was used to regulate the output voltage of the boost rectifier.…”

Section: Simplified DC Microgrid Description and System Parametersmentioning

confidence: 99%

Low-Voltage Solid-State DC Breaker for Fault Protection Applications in Isolated DC Microgrid Cluster

et al. 2019

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Due to the interconnected scheme of multiple components, such as distributed generators, storage systems, and loads through converters to a common bus in DC microgrids, the possibility of fault occurrence is increasing significantly. Meanwhile, due to the huge and rapid increase of short-circuit currents, the development of a small- and large-scale DC system requires a reliable and fast protection system to ensure fault clearance and maintain safety for the rest of the system. Thus, fault protection has been focused on as one of the most critical issues in a direct current network. The application of traditional circuit-breakers for DC fault protection has the drawback of slow operation, which requires a high rating power equipment. Recently, the high speed and excellent performance capabilities of semiconductor breakers have attracted a lot of attention and been considered as an optimal solution for fast DC fault interruption. In this study, a bidirectional Insulated-Gate Bipolar Transistor (IGBT) semiconductor breaker, suitable for the fault protection of low-voltage DC networks, is proposed. The operating characteristics of this breaker are based on changes in the circuit current and terminal voltage of IGBTs. It detects the abrupt change of the terminal voltage as an abnormal condition and isolates the faulted branch in a short time to prevent the operation disturbance in the healthy part of the network. Therefore, for the entire protection of a typical 400V DC-microgrid cluster, breakers need to be integrated and examined in each branch and the interconnected lines. The proposed protection method in this study is examined in a Simulink®/MATLAB environment to analyze and assess its operation.

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Section: Simplified DC Microgrid Description and System Parametersmentioning

confidence: 99%

Low-Voltage Solid-State DC Breaker for Fault Protection Applications in Isolated DC Microgrid Cluster

et al. 2019

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“…The governor was modeled with a droop controller. Also, a droop control method is introduced in references [26][27][28][29]. The active power control loop determines the output active power of the generator according to the reference value.…”

Section: System Dynamic Modelmentioning

confidence: 99%

Islanding Detection of Synchronous Distributed Generator Based on the Active and Reactive Power Control Loops

et al. 2018

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There has been a considerable importance for the islanding detection due to the growing integration of distributed generations (DGs) in the modern power grids. This paper proposes a novel active islanding detection scheme for synchronous DGs, considering two additional compensators and a positive feedback for each of active and reactive power control loops. The added blocks are designed using the small gain theorem and stability margins definition considering characteristics of open loop transfer functions of synchronous DG control loops. Islanding can be detected using the proposed method even where there is an exact match between generation and local load without sacrificing power quality. In addition, the performance of the proposed method can be retained even with high penetration of motor loads. The proposed scheme improves the stability and power quality of the grid, when the synchronous DG is subjected to the grid-connected disturbances. Furthermore, this method augments the stability margins of the system in the grid-connected conditions to enhance the disturbances ride-through capability of the system and reduce the negative impact of the active methods on the power quality. Simultaneous advantages of the proposed scheme are demonstrated by modeling a test system in MATLAB software and time-domain simulation achieved by PSCAD.

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“…The following formula can be obtained by replacing the intermediate variable Id and Dd obtained in Equations (10) and (11), with the known quantity such as ugd. After feed-forward decoupling control cancels out the coupling terms of the controlled object, the d axis and q axis do not affect each other.…”

Section: Output Impedance Modeling Of Three-phase Balanced Pwm Rectifiermentioning

confidence: 99%

“…However, this time domain analysis method requires knowing the details of all circuit topology and control strategies of the whole system and establishing the time-domain state space model. The modeling process is very complex [8][9][10]. In order to adapt to a complex cascade system structure, a frequency domain analysis method based on the impedance model can be used.…”

Section: Introductionmentioning

confidence: 99%

Impedance Modeling and Stability Analysis for Cascade System of Three-Phase PWM Rectifier and LLC Resonant Converter

Wang

Yu-yang

et al. 2018

Energies

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In this paper; the impedance model of PWM rectifier and LLC resonant converter are deduced, and the stability analysis of cascade system is studied. The principle of three-phase PWM rectifier is introduced; and the small signal model in d-q coordinate system is deduced. The expression of dc side output impedance model for PWM rectifier is derived. The LLC resonant converter is operated in a fixed-frequency state, and the LLC resonant converter is modeled as a small signal model. On this basis, the input impedance model expression of the LLC resonant converter is derived. According to the impedance stability criterion, it can seen that the amplitude of input impedance is greater than the amplitude of output impedance in a certain frequency domain. In addition, the Nyquist curve is not around the point (−1,0), which can judge that the cascade system is stable. In simulation software, a cascade system simulation is built and corresponding simulation curves are obtained, which verifies the stability of the cascade system.

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Control Hardware-in-the-Loop Demonstration of a Building-Scale DC Microgrid Utilizing Distributed Control Algorithm

Cited by 19 publications

References 8 publications

Low-Voltage Solid-State DC Breaker for Fault Protection Applications in Isolated DC Microgrid Cluster

Low-Voltage Solid-State DC Breaker for Fault Protection Applications in Isolated DC Microgrid Cluster

Islanding Detection of Synchronous Distributed Generator Based on the Active and Reactive Power Control Loops

Impedance Modeling and Stability Analysis for Cascade System of Three-Phase PWM Rectifier and LLC Resonant Converter

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