An Adaptive Control System for a DC Microgrid for Data Centers

Salomonsson, Daniel; Söder, Lennart; Sannino, A.

doi:10.1109/tia.2008.2006398

Cited by 312 publications

(88 citation statements)

References 14 publications

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“…According to Tables 1-4, the P CPL and TLL have high impacts on the modes λ 3,4 that are related to i dc and v dc (see Figure 7). According to Tables 1 and 3, increasing the transmission line length, while keeping the P CPL constant, results in lower damping for the modes λ 3,4 . Also, considering Tables 3 and 4, at TLL = 2 km and by increasing the P CPL , the modes λ 3,4 move toward the unstable state.…”

Section: State Space Model and Small Signal Stability Analysismentioning

confidence: 96%

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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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Section: State Space Model and Small Signal Stability Analysismentioning

confidence: 96%

“…of reliability and power quality and improvement of overall efficiency. [3][4][5][6] The DG units in a microgrid can be operated in the islanded mode and grid connected mode. In the grid-connected mode, the grid dictates the frequency and voltage of the system and the DG sources inject constant active and reactive power.…”

mentioning

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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“…Five typical energy flow states exist in the studied system, as shown in Fig.8. Fig.8(a) is corresponding to energy flow state (1). Here the PV module generates power and the battery is fully charged.…”

Section: The Optimal Energy Management Strategy Of Imgsmentioning

confidence: 99%

“…Recently, a lot of research has been done on DC bus system. An adaptive control system of DC MG for data centers is proposed [1], and the possible of the reliable power supply for sensitive load by the DC MG is studied. However, RES are not used in this system.…”

Section: Introductionmentioning

confidence: 99%

Research of Integration Micro-grid System based on DC Bus

Shi

Tang

Sun

et al. 2015

Advances in Intelligent Systems Research

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Abstract. In order to make use of Distributed Generation(DG) flexibly, the novel Integration Micro-grid System(IMGS) based on DC bus is proposed in this paper. The changing rule of photovoltaic array in a day is studied deeply. The control strategies based on droop characteristic are adopted by grid-connected module and energy storage module so that DC bus possesses droop characteristic similar to the traditional grid. On the basis of battery's working principle, a novel control strategy is proposed, and then Three-part Mode Charging (TMC) is achieved conveniently. In order to make IMGS working in optimum state all the time, the optimal energy management strategy is proposed. At last, a simulation platform is established in MATLAB/Simulink to verify the presented control methods.

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“…On other hand, DC microgrids have been used in telecom power systems, data centers system, generating stations, traction power systems, and residential houses. 5,6 The motivation behind the DC microgrid power distribution is to achieve "zero energy building model." The DC microgrid based distribution power generation uses the independent power production control to suppress the circulating current from renewable energy sources.…”

mentioning

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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An Adaptive Control System for a DC Microgrid for Data Centers

Cited by 312 publications

References 14 publications

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

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

Research of Integration Micro-grid System based on DC Bus

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

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