Autonomous Power Management of Series-Parallel Hybrid Microgrid

Das, Siji; Nutkani, Inam Ullah; Teixeira, Carlos Eduardo

doi:10.1109/icpes47639.2019.9105638

Cited by 3 publications

(10 citation statements)

References 15 publications

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“…However, as the methods are similar to those in [9] and [12], the challenging issues remain in the control. In [23], an autonomous power control scheme has been developed for islanded series systems, where PV panels and dispatchable sources are interfaced. Yet, the PFs of PV converters are always kept consistent with the entire system, which may lead to poor PV power utilization, and potential overloading of the dispatchable converter.…”

Section: Introductionmentioning

confidence: 99%

Distributed Control of Islanded Series PV-Battery-Hybrid Systems With Low Communication Burden

Pan

Sangwongwanich

Yang

et al. 2021

IEEE Trans. Power Electron.

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The series photovoltaic-battery-hybrid (PVBH) system is considered as a promising solution to better integrating distributed energy sources. However, the state-of-the-art controls are either highly dependent on the communication, by which real-time control variables should be transmitted among all converters, or only suitable for PVBH systems with unity power factor. Accordingly, a novel distributed control is proposed for islanded PVBH systems in this paper. Firstly, a PQ decoupling control is introduced, enabling the control of individual converters with only local measurements. Then, a droop controller is implemented in the battery converter, allowing the system to participate in regulating the islanded grid (voltage and frequency). A reactive power distribution method is subsequently introduced to equalize power sharing among the converters. Additionally, two anti-over-modulation loops are developed to address the over-modulation issue of both PV converters and the battery converter. With the proposed method, only a few variables with very slow dynamics should be transmitted, and the communication burden can be significantly reduced, leading to higher reliability to some extent. Experimental results have validated the effectiveness of the proposal.

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Section: Introductionmentioning

confidence: 99%

Distributed Control of Islanded Series PV-Battery-Hybrid Systems With Low Communication Burden

Pan

Sangwongwanich

Yang

et al. 2021

IEEE Trans. Power Electron.

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show abstract

“…However, this approach is not feasible, as the selected converter will easily suffer from overloading when a large amount of reactive power is required. To improve the utilization of the power capacity of all converters, a distributed power management approach was proposed in [8], where the reactive power is distributed among all converters. Nevertheless, the power factors (PFs) of individual converters in [8] are always kept consistent with the PF of the entire system, which means that the reactive power is distributed in proportion to the active power of each PV converter.…”

Section: Introductionmentioning

confidence: 99%

“…To improve the utilization of the power capacity of all converters, a distributed power management approach was proposed in [8], where the reactive power is distributed among all converters. Nevertheless, the power factors (PFs) of individual converters in [8] are always kept consistent with the PF of the entire system, which means that the reactive power is distributed in proportion to the active power of each PV converter. In other words, the PV converter with more active power will also have to provide more reactive power, which will increase the uneven loading among all converters.…”

Section: Introductionmentioning

confidence: 99%

“…In other words, the PV converter with more active power will also have to provide more reactive power, which will increase the uneven loading among all converters. Therefore, the approach in [8] may not ensure optimal reactive power distribution in series PVBH systems.…”

Section: Introductionmentioning

confidence: 99%

“…In fact, according to the experimental results in [9]- [11], the total apparent power is only approximately balanced among all converters, and the total loading of certain converters (e.g., apparent power) can be higher than others. This means that certain converters are still under the risk of overloading or over-modulation, which may adversely affect the system performance, e.g., accelerated aging of certain converters [13] and active power curtailment of PV converters [8].…”

Section: Introductionmentioning

confidence: 99%

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Optimization of Reactive Power Distribution in Series PV-Battery-Hybrid Systems

Pan

Sangwongwanich

Yang

et al. 2021

2021 IEEE Energy Conversion Congress and Exposition (ECCE)

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Series topologies have been gaining interest in photovoltaic-battery-hybrid (PVBH) applications. In previous research, the reactive power contribution from PVBH systems is distributed in a way to maintain the apparent power of all converters at the same level. However, the prior-art strategies cannot ensure optimal reactive power distribution, as the calculated reactive power references are not the analytical optimal solutions. In most cases, the apparent power of certain converters can be higher than others. This will lead to the overloading of certain converters and even the power curtailment of PV converters in extreme cases. To improve the performance of the reactive power distribution, an optimized reactive power distribution method based on the particle swarm optimization (PSO) algorithm is proposed in this paper. By doing so, the optimal reactive power reference for each converter can be obtained, and thus, preventing the potential overloading of certain converters. Experimental results have validated the effectiveness of the proposed solution.

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Distributed Control and Advanced Modulation of Cascaded Photovoltaic-Battery Converter Systems

Pan¹

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Autonomous Power Management of Series-Parallel Hybrid Microgrid

Cited by 3 publications

References 15 publications

Distributed Control of Islanded Series PV-Battery-Hybrid Systems With Low Communication Burden

Distributed Control of Islanded Series PV-Battery-Hybrid Systems With Low Communication Burden

Optimization of Reactive Power Distribution in Series PV-Battery-Hybrid Systems

Distributed Control and Advanced Modulation of Cascaded Photovoltaic-Battery Converter Systems

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