Power Management for a Hybrid AC/DC Microgrid With Multiple Subgrids

Xia, Yanghong; Wei, Wei; Yu, Miao; Wang, Xiaoming; Peng, Yonggang

doi:10.1109/tpel.2017.2705133

Cited by 204 publications

(116 citation statements)

References 32 publications

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“…In Reference, author explains the control and power management strategy in DC microgrid. In Reference, author proposes a decentralized power management method for the hybrid microgrid to make the interacted subgrids operate in coordination and support each other. Droop based control strategy is proposed to maintain the common bus voltage and to realize power sharing among storages in the storage subgrids.…”

Section: Introductionmentioning

confidence: 99%

Energy management of distributed renewable energy sources for residential DC microgrid applications

Kathiresan¹,

Natarajan²,

Gnanavadivel³

2019

Int Trans Electr Energ Syst

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This paper proposes a low voltage (400 Vdc) distributed renewable energy fed DC microgrid structure for a residential system, which uses DC voltage for the electronic appliances. The distributed energy sources—solar photovoltaic (PV) and wind energy are considered as input sources. The output power from these sources is stochastic in nature. An efficient energy management and switching circuit is designed to control the power flow from the sources with a high gain DC‐DC converter as the main component. The output power regulation is achieved by means of controlling duty ratios of the switches in the proposed high gain converter through PI controller. The control algorithm effectively converts the unregulated DC power from the solar PV and wind into regulated DC for driving a DC load connected in DC‐microgrid. The energy management and switching circuits account for seamless operation of the DC microgrid under various modes when one or all the sources and loads are connected directly at the DC grid link. The designed energy management and switching circuit also ensures the power balancing in the proposed system. The proposed DC microgrid structure is simulated using MATLAB Simulink. The performance of the proposed high gain converter for the DC grid link voltage regulation is analyzed under source power variation and dynamic changes in load for various operating conditions. The proposed DC microgrid structure is validated using simulation results.

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Section: Introductionmentioning

confidence: 99%

Energy management of distributed renewable energy sources for residential DC microgrid applications

Kathiresan¹,

Natarajan²,

Gnanavadivel³

2019

Int Trans Electr Energ Syst

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“…Load sharing as a main issue in microgrids first reported regarding AC microgrids in several literatures, such as in Yang et al and Xia et al The study system in the previous studies is a hybrid microgrid, and the conventional AC droop control is used for load sharing between bidirectional power converters (BPCs). In Yang et al and Xia et al, the effect of transmission line resistance on the load sharing and voltage regulation has not been discussed. On the other hand, in this paper, the focus is on the DC microgrid, and thus as will be discussed later, we use conventional DC droop control together with a new proposed compensator, which result in accurate load sharing and proper voltage regulation under non‐negligible transmission lines resistances.…”

Section: Introductionmentioning

confidence: 99%

“…For example, in Xia et al, 31 to stabilize the system under presence of CPLs, an improved droop control based on the Pdc-V dc 2 is proposed, which compared with the conventional droop control, can upgrade the system stability. Load sharing as a main issue in microgrids first reported regarding AC microgrids in several literatures, such as in Yang et al and Xia et al 32,33 The study system in the previous studies 32,33 is a hybrid microgrid, and the conventional AC droop control is used for load sharing between bidirectional power converters (BPCs). In Yang et al and Xia et al, 32,33 the effect of transmission line resistance on the load sharing and voltage regulation has not been discussed.…”

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confidence: 99%

A generalized droop‐based compensator for addressing the issues raised in a DC microgrid comprising hybrid wind‐battery‐back up generation sources

Rahimi

Ghadiriyan

2019

Int Trans Electr Energ Syst

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Summary This paper deals with the improvement of stability margin, dynamic behavior, and steady state performance of a direct current (DC) microgrid system consisting of wind energy sources, battery energy storage, and back up generation source. The DC microgrid control system should set the DC bus voltage at the allowable range and provide proper load sharing among generation sources. Accurate load sharing, proper voltage regulation, and dynamic stability of the system at presence of constant power loads (CPLs) are the main problems that may be raised in operation of DC microgrid systems. In order to address these issues, this paper proposes a generalized droop‐based compensator that not only stabilizes the DC microgrid dynamics at high penetration of CPLs, but also addresses the issues such as inaccurate load sharing and improper voltage regulation. The proposed generalized droop‐based compensator comprises three parts: the first part enhances the DC microgrid stability even at high penetration of CPL, the second part compensates the transmission lines voltage drops and improves the function of voltage regulation, and the third part performs proper load sharing among different generation sources. At the end, capability of the proposed compensator is examined by frequency response analysis and time domain simulations.

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“…In order to increase noticeably the accurate performance of the microgrid systems, many microgrid‐based control strategies have been proposed recently . In Xia et al, a

P_{dc} - v_{dc}^{2}

droop control technique has been designed for controlling the common bus voltage and providing a suitable power sharing in a hybrid microgrid. Also, for the used bidirectional converters in the considered microgrid, a coordinated power‐based controller based on the common bus voltage, ac sub grid frequency, and dc sub grid voltage has been proposed …”

Section: Introductionmentioning

confidence: 99%

Distributed energy storage system‐based control strategy for hybrid DC/AC microgrids in grid‐connected mode

2018

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Summary This paper concentrates on the issues with the aim of providing a constant dc‐link voltage and desired power sharing for a distributed energy storage system (DESS)‐based hybrid microgrid under load variations. The hybrid microgrid which is consisted of PV system, lithium battery‐based storage system and a grid‐connected dc/ac converter are controlled by designing a controller based on the zero dynamics‐based mathematical equations of all used converters. Two buck and bidirectional buck‐boost dc/dc converters employed in PV and DESS systems, respectively, are responsible for damping the dc‐link voltage fluctuations, and also the grid‐connected converter is set to enhance the grid power quality and supply continuously the grid‐connected loads. The main contributions of the proposed control technique are simplicity and providing the simultaneous stable performance for both DC and AC sides under both DC and grid‐connected loads variations. Moreover, another contribution of the proposed control technique is providing accurate coordination in both steady‐state and dynamic conditions. To analyze the proposed controller, the dynamic operations of the converters in various operating conditions are evaluated. In this evaluation, several curves based on their zero dynamics are achieved, and their desired operations are completely investigated in different operating conditions. Simulation results in MATLAB/SIMULINK verify the proposed controller ability at reaching the desired zero dynamics and the stable performance of the proposed hybrid microgrid.

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Power Management for a Hybrid AC/DC Microgrid With Multiple Subgrids

Cited by 204 publications

References 32 publications

Energy management of distributed renewable energy sources for residential DC microgrid applications

Energy management of distributed renewable energy sources for residential DC microgrid applications

A generalized droop‐based compensator for addressing the issues raised in a DC microgrid comprising hybrid wind‐battery‐back up generation sources

Distributed energy storage system‐based control strategy for hybrid DC/AC microgrids in grid‐connected mode

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