An &lt;italic&gt;f-P/Q&lt;/italic&gt; Droop Control in Cascaded-Type Microgrid

Sun, Yang; Shi, Guangze; Li, Xing; Yuan, Wenbin; Su, Mei; Han, Hua; Hou, Xiaochao

doi:10.1109/tpwrs.2017.2752646

Cited by 91 publications

(48 citation statements)

References 14 publications

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“…Two new problems need to be solved immediately in a cascade-type microgrid: the synchronization and power balance of distributed generators. An f-P/Q droop control strategy is proposed in [25] to solve this problem. This proposed droop control can achieve power balance under both resistive-inductive and resistive-capacitive loads autonomously.…”

Section: Load Sharing Without Communication-droop Controlmentioning

confidence: 99%

The Analysis of Technical Trend in Islanding Operation, Harmonic Distortion, Stabilizing Frequency, and Voltage of Islanded Entities

2019

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This paper focuses on autonomous multi-islanded entities and the seamless reconnection to the main grid as the self-healing ability of the future power system. The minimization of power quality issues (mainly that of voltage, frequency, and harmonics) in such entities based on controllers, with or without intercommunication, is also an important part of this paper. The future power system, with the significant penetration of distributed generations (DGs), can rapidly respond to any problem occurring within it by separating into autonomous islanded entities to prevent the disconnection of DGs. As a result, high-quality and continuous power is supplied to consumers. Finally, future research that is necessary for the realization of the future power system is discussed.

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Section: Load Sharing Without Communication-droop Controlmentioning

confidence: 99%

The Analysis of Technical Trend in Islanding Operation, Harmonic Distortion, Stabilizing Frequency, and Voltage of Islanded Entities

2019

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“…An adaptative droop control for balancing the state of charge of multiple energy storage systems in decentralized microgrids is studied in [29]. Moreover, numerous control methodologies have been proposed to improve the ac microgrid performance [30][31][32][33][34][35][36][37]. A fully decentralized control and a f P/Q droop control scheme of gridconnected cascaded inverters are reported [30,31].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, numerous control methodologies have been proposed to improve the ac microgrid performance [30][31][32][33][34][35][36][37]. A fully decentralized control and a f P/Q droop control scheme of gridconnected cascaded inverters are reported [30,31]. A cost-function-based decentralized power quality compensation method realizing simultaneously bus voltage compensation and inverter current sharing is proposed [32].…”

Section: Introductionmentioning

confidence: 99%

Stability analysis and decentralized control of inverter-based ac microgrid

Firuzi

Roosta

Gitizadeh

2019

Prot Control Mod Power Syst

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This work considers the problem of decentralized control of inverter-based ac micro-grid in different operation modes. The main objectives are to (i) design decentralized frequency and voltage controllers, to gather with power sharing, without information exchange between microsources (ii) design passive dynamic controllers which ensure stability of the entire microgrid system (iii) capture nonlinear, interconnected and large-scale dynamic of the micro-grid system with meshed topology as a port-Hamiltonian formulation (iv) expand the property of shifted-energy function in the context of decentralized control of ac micro-grid (v) analysis of system stability in large signal point of view. More precisely, to deal with nonlinear, interconnected and large-scale structure of micro-grid systems, the port-Hamiltonian formulation is used to capture the dynamic of micro-grid components including microsource, distribution line and load dynamics as well as interconnection controllers. Furthermore, to deal with large signal stability problem of the microgrid system in the grid-connected and islanded conditions, the shifted-Hamiltonian energy function is served as a storage function to ensure incremental passivity and stability of the microgrid system. Moreover, it is shown that the aggregating of the microgrid dynamic and the decentralized controller dynamics satisfies the incremental passivity. Finally, the effectiveness of the proposed controllers is evaluated through simulation studies. The different scenarios including grid-connected and islanded modes as well as transition between both modes are simulated. The simulation conforms that the decentralized control dynamics are suited to achieve the desired objective of frequency synchronization, voltage control and power sharing in the grid-connected and islanded modes. The simulation results demonstrate the effectiveness of the proposed control strategy.

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“…Usually, the main control objectives of a DC microgrid include maintaining stability [4][5][6][7][8][9], minimizing cost [10][11][12], sharing power and regulating voltage [13]. For these objectives, there are mainly three control methods: decentralized control [10,12,[14][15][16][17], distributed control [18][19][20][21][22][23][24][25][26] and centralized control [11,27].…”

Section: Introductionmentioning

confidence: 99%

“…In general, there are two kinds of microgrids: direct current (DC) microgrids and alternating current (AC) microgrids. At present, domestic research on microgrids has primarily focused on AC microgrids [12][13][14][15][16][17]. However, DC microgrids have the following advantages: high transmission efficiency, high reliability, no frequency synchronization issues, easier integration of renewable energy, and ease of stabilization, therefore, DC microgrids are increasingly being used in applications such as aircraft, spacecraft, and electric vehicles [4,24].…”

Section: Introductionmentioning

confidence: 99%

Stabilization Method Considering Disturbance Mitigation for DC Microgrids with Constant Power Loads

Liang

Liu

2019

Energies

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In this paper, the stability of direct current (DC) microgrids with a constant power load (CPL) and a non-ideal source is investigated. The CPL’s negative impedance will destabilize the system, and disturbances in the non-ideal source will degrade the load voltage quality. In this study, we aim to: (1) overcome the instability of the CPL; (2) mitigate disturbances from the non-ideal source; (3) prevent the discontinuous harmonic current of high-frequency switching regulator from interfering with the source. Then, a stabilization method based on active damping which can achieve the above three objectives simultaneously is proposed. To obtain the stability conditions, the small-signal model of the system near the high-voltage equilibrium is established. Then, stability conditions are derived by eigenvalue analysis, and the domain of attraction near equilibrium is also obtained using the quadratic Lyapunov function. For the second objective, the key is to choose the optimal parameters to achieve disturbance attenuation. For the third objective, the active damper can separate the source from the switching regulator, which can prevent the discontinuous harmonic current. Moreover, the proposed method can be extended to multiple cases, and simulation results verify the effectiveness of the proposed method.

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An <italic>f-P/Q</italic> Droop Control in Cascaded-Type Microgrid

Cited by 91 publications

References 14 publications

The Analysis of Technical Trend in Islanding Operation, Harmonic Distortion, Stabilizing Frequency, and Voltage of Islanded Entities

The Analysis of Technical Trend in Islanding Operation, Harmonic Distortion, Stabilizing Frequency, and Voltage of Islanded Entities

Stability analysis and decentralized control of inverter-based ac microgrid

Stabilization Method Considering Disturbance Mitigation for DC Microgrids with Constant Power Loads

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