Control Strategy for Flexible Microgrid Based on Parallel Line-Interactive UPS Systems

Guerrero, Josep M.; Vasquez, Juan C.; Matas, J.; Castilla, Miguel; Vicuña, Luis García de

doi:10.1109/tie.2008.2009274

Cited by 726 publications

(430 citation statements)

References 29 publications

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“…where Z(K) is defined in (12). Transfer functions S(λ) = (I + G(λ)K) −1 and W s are sensitivity function and a weighting filter designed based on the desired time-domain performance [44].…”

Section: Robust Fixed-order Decentralized Voltage Controlmentioning

confidence: 99%

“…A control strategy ubiquitously used for the control of microgrids is droop control which relies on the principle of power balance of a classical synchronous generator in conventional power networks (see, e.g., [5,6,7,8,9,10,2,11,12,13,14]). In the power systems based on rotating generators, frequency (rotor speed) is dependent on active power balance, i.e.…”

Section: Introductionmentioning

confidence: 99%

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Fixed-order decentralized/distributed control of islanded inverter-interfaced microgrids

Sadabadi

Karimi

2015

Control Engineering Practice

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This paper focuses on the problem of voltage control of islanded inverterinterfaced microgrids consisting of several distributed generation (DG) units with parallel structure. The main objectives are to (i) design a decentralized/distributed voltage controller with minimum information exchange between DG units and their local controllers (ii) design a fixed-/low-order dynamic output feedback controller which ensures stability as well as desired performance of the microgrid system in spite of load parameter uncertainties. To this end, the problem is formulated as an optimization problem which is the minimization of the cardinality of a pattern matrix subject to an H ∞ performance constraint. Since the problem is intrinsically non-convex, a convex design procedure for the controller synthesis is proposed in this paper. The effectiveness of the proposed controller is evaluated through simulation studies and Hardware-In-the-Loop (HIL) verifications. The simulation and experimental results demonstrate that the effectiveness of the proposed control strategy.

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Section: Robust Fixed-order Decentralized Voltage Controlmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fixed-order decentralized/distributed control of islanded inverter-interfaced microgrids

Sadabadi

Karimi

2015

Control Engineering Practice

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“…Micro-grids support a flexible and efficient electric grid by enabling the integration of growing deployments of distributed energy resources such as renewable like solar as shown in Figure1. In addition, the use of local sources of energy to serve local loads helps reduce energy losses in transmission and distribution, further increasing the efficiency of the electric delivery system [7]- [8]. Solar photovoltaic, fuel cells and battery output are available as source in dc form [9]- [10] and therefore, another stage of conversion is required before its interconnection with an ac system or regulated dc system.…”

Section: Introductionmentioning

confidence: 99%

Bidirectional Resonant DC-DC converter for Microgrid Applications

Jaisudha¹,

Srinivasan²,

Gunasekaran³

2017

IJPEDS

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This paper proposes a non-isolated soft-switching bidirectional DC/DC converter for interfacing energy storage in DC microgrid. The proposed converter employs a half-bridge boost converter at input port followed by a LCC resonant tank to assist in soft-switching of switches and diodes, and finally a voltage doubler circuit at the output port to enhance the voltage gain by two times. The LCC resonant circuit also adds a suitable voltage gain to the converter. Therefore, overall high voltage gain of the converter is obtained without a transformer or large number of multiplier circuit. For operation in buck mode, the high side voltage is divided by half with capacitive divider to gain higher step-down ratio. The converter is operated at high frequency to obtain low output voltage ripple, reduced magnetics and filters. Zero voltage turn-on is achieved for all switches and zero current turn-on and turn-off is achieved for all diodes in both modes i.e., buck/boost operation. Voltage stress across switches and diode is clamped naturally without external snubber circuit. An experimental prototype has been designed, built and tested in the laboratory to verify the performance of the proposed converter.

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“…Added by energy storage devices, DGs can provide power to a local load, thus forming a microgrid [1]. In order to provide high quality and reliable power supply, the microgrid should not only be able to operate in gridconnected mode, but also islanded mode to provide power for local loads when it is necessary [2].…”

Section: Introductionmentioning

confidence: 99%

Research on the synchronization control strategy for microgrid-connected voltage source inverter

Cao

et al. 2015

2015 IEEE 6th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)

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Abstract-Microgrid is intended and featured to be able to operate in both grid-connected and islanded mode to ensure high quality and reliable power supply. In order to achieve stable operation of the microgrid-connected voltage source inverter (MVSI) units under paralleled or grid-connected mode, a novel synchronization method based on droop control is proposed in this paper. The difference of phase and amplitude between different MVSI units is detected and is used to calculate the output frequency and amplitude of the MVSI. This method can smooth transfer the MVSI units from standalone mode to paralleled mode. The simulation and experimental results show that the proposed method is effective in achieving paralleled operation of the MVSI units.

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Control Strategy for Flexible Microgrid Based on Parallel Line-Interactive UPS Systems

Cited by 726 publications

References 29 publications

Fixed-order decentralized/distributed control of islanded inverter-interfaced microgrids

Fixed-order decentralized/distributed control of islanded inverter-interfaced microgrids

Bidirectional Resonant DC-DC converter for Microgrid Applications

Research on the synchronization control strategy for microgrid-connected voltage source inverter

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