Fully decentralized modular approach for parallel converter control

A distributed networked method for load sharing of parallel converters is proposed. Using consensus-voting protocols, the need for a master converter or a central controller is eliminated. The proposed modular structure does not require a priori knowledge of the number of active converters, which makes it a viable option for a plug-and-play operation. The voltage regulation at the desired set point and the consensus of the per-unit currents are analytically proven for the steady-state conditions. Moreover, in the absence of a centralized controller, measuring output voltages of each converter individually can lead to a measurement mismatch. The effect of this voltage mismatch on the controller performance is analyzed and a solution is provided. Experimental results verify the proposed distributed control method using a parallel four-converter system, and show its efficacy in response to changes in operational conditions and its resiliency against the loss of converters or communication links.

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“…Using (9), (13), and (18), transfer functions from the input, V ref , to the outputs, V and I, can be derived,…”

Section: A Controller Dynamicsmentioning

confidence: 99%

Team-Oriented Load Sharing in Parallel DC–DC Converters

Moayedi

Nasirian

Lewis

et al. 2015

IEEE Trans. on Ind. Applicat.

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“…16 shows the experimental result of a start-up sequence with three carriers. The carriers V car (1) , V car (2) and V car (3) are located in the initial voltage levels: V ref , V + and V -. As expected, they start with their predefine slopes.…”

Section: Start-up Sequencementioning

confidence: 99%

“…To resolve this problem, some Masterless control solutions are proposed [2][3][4][5][6][7][8]. In [6], the central control part is distributed in each leg.…”

Section: Introductionmentioning

confidence: 99%

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Modular interleaved carrier generator using a straightforward implementation method

Xiao

Cousineau

2013

2013 IEEE 11th International Workshop of Electronics, Control, Measurement, Signals and Their Application to Mechatronics

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This article presents a modular approach to generate the interleaved carriers of a parallel converters. Compared with previous solutions requiring accurate analog computations, a straightforward implementation of the generator is proposed here. By using only comparators and logical gates dedicated to the tuning of the carrier phase, a correct interleaving of the carriers is obtained in steady-state. The simplicity of the circuit offers the opportunity to implement it in a digital system. Connected together in a daisy-chain topology, the carrier generators communicate with its neighboring modules. This solution presents a complete modularity and allows reconfiguring the converter from a given number of legs to another without any additional consideration. In order to guarantee a proper start-up, some special cares on the setup of the carrier generators have to be considered. A study of the start-up is presented which ensure the system convergence for any number of legs.

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“…If this is not considered, harmonic are generated due to missing level in the converter output. Implementation of decentralized technique was proposed in [5][6][7][8][9][10][11] for analogic circuits. Carriers are interleaved using information from the carrier of its two immediate neighbors.…”

Section: Introductionmentioning

confidence: 99%

Real-Time Simulation of Interleaved Converters with Decentralized Control

Grégoire¹,

Cousineau²,

Seleme³

et al. 2016

REPQJ

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This paper presents a decentralized control algorithm for interleaved converters for high reliability application. In previous literature, a master control provides information on the system configuration in order to generate the different carriers. The whole premise of the proposed algorithm is that each module only communicates with its two immediate neighbors which reduce communication latency. Using only the neighbors proper interleaving of the carriers and balancing the converter leg currents is achieved. Carriers from each converter automatically adjust their phase, as modules are added or removed dynamically. Such implementation offers a completely decentralized control which makes it fully modular. Results of the controller are presented using a real-time simulator.

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Fully decentralized modular approach for parallel converter control

Cited by 28 publications

References 10 publications

Team-Oriented Load Sharing in Parallel DC–DC Converters

Team-Oriented Load Sharing in Parallel DC–DC Converters

Modular interleaved carrier generator using a straightforward implementation method

Real-Time Simulation of Interleaved Converters with Decentralized Control

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