Team-Oriented Load Sharing in Parallel DC–DC Converters

Moayedi, Seyedali; Nasirian, Vahidreza; Lewis, Frank L.; Davoudi, Ali

doi:10.1109/tia.2014.2336982

Cited by 82 publications

(29 citation statements)

References 34 publications

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“…Secondary controllers allowing for PnP operations have been analyzed in [88]- [90], [132], [143], [144]. As reviewed in Section IV, one goal of secondary control is to compensate for deviations of voltages from reference values, which might be caused by primary controllers, and to achieve advanced behaviors such as current sharing and voltage balancing.…”

Section: Plug and Play Operation In DC Mgsmentioning

confidence: 99%

“…In [143], [144] bus-connected MGs with ideal power lines are considered. The topology of the communication network linking DGs can be general, albeit connected.…”

Section: Plug and Play Operation In DC Mgsmentioning

confidence: 99%

“…However, the design of local regulators, based on this criterion, must be conducted in a centralized fashion. The design procedure in [144] suffers from a similar drawback. Bus-connected MGs are also considered in [89], with the goal of analyzing the impact of the network topology and communication non-idealities (e.g time discretization) on performance.…”

Section: Plug and Play Operation In DC Mgsmentioning

confidence: 99%

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Review on Control of DC Microgrids

Meng

Shafiee

Trecate

et al. 2017

IEEE J. Emerg. Sel. Topics Power Electron.

361

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Abstract--This paper performs an extensive review on control schemes and architectures applied to DC microgrids. It covers multi-layer hierarchical control schemes, coordinated control strategies, plug-and-play operations, stability and active damping aspects as well as nonlinear control algorithms. Islanding detection, protection and microgrid clusters control are also briefly summarized. All the mentioned issues are discussed with the goal of providing control design guidelines for DC microgrids. The future research challenges, from the authors' point of view, are also provided in the final concluding part.

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Section: Plug and Play Operation In DC Mgsmentioning

confidence: 99%

“…In [143], [144] bus-connected MGs with ideal power lines are considered. The topology of the communication network linking DGs can be general, albeit connected.…”

Section: Plug and Play Operation In DC Mgsmentioning

confidence: 99%

Section: Plug and Play Operation In DC Mgsmentioning

confidence: 99%

See 1 more Smart Citation

Review on Control of DC Microgrids

Meng

Shafiee

Trecate

et al. 2017

IEEE J. Emerg. Sel. Topics Power Electron.

361

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show abstract

“…In [9], graph theory and consensus algorithm are employed to achieve coordinated control and operation of multiple team-oriented converters. Since only local information is needed, the proposed method does not rely on central controller and does not need the total number of converters, which make it suitable for the plug-and-play operation of multiple DC-DC converters.…”

Section: Review Of Active Current Sharing Strategies In DC Microgridsmentioning

confidence: 99%

Looped-chain-based active current sharing strategy in DC microgrids

Liu

et al. 2017

Archives of Electrical Engineering

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Abstract:The integration of renewable energy sources in modern electric grids have drawn increasing attention nowadays. In order to effectively manage large-scale renewable energy sources and achieve flexible and efficient operation, the concept of microgrids have been proposed. Considering the nature of DC outputs in many distributed energy resources (DERs), DC microgrids have been extensively studied in the past years. Among the operational issues in DC microgrids, current sharing issues have become an important topic since it is highly relevant to the operation of DC microgrids. By adopting a proper design of current sharing strategy in DC microgrids, the current rating violations in each interface converter can be successfully avoided. In this paper, a looped-chainbased active current sharing strategy is proposed to realize high accuracy current sharing in DC microgrids. In particular, the output current is shared between the neighboring interface converters. Hence, following a clockwise or counter-clockwise order, a loopedchain-based control diagram can be established to share the reference value of the output current. A final status in the whole DC microgrid is that the output current of every interface converter is equalized. Hence, the desired current sharing objective can be satisfied. A MATLAB simulation model is established to verify the proposed loopedchain-based active current sharing strategy in DC microgrids.

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“…, whose eigenvalues determine the global dynamics of the entire system (i.e., the microgrid) [16]- [18]. The Laplacian matrix is balanced if the in-degree and outdegree matrices are equal; particularly, an undirected (bidirectional) data network satisfies this requirement.…”

Section: A Preliminary Of Graph Theorymentioning

confidence: 99%

Distributed optimal dispatch for DC distribution networks

Nasirian

Lewis

Davoudi

2015

2015 IEEE First International Conference on DC Microgrids (ICDCM)

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Economic dispatch coordinates the generation across the distribution network while minimizing the overall generational cost. Optimal dispatch is a global optimization problem and, thus, conventionally carried out by a supervisory controller. However, reliability concerns challenge such architectural design as the failure in the central controller or any communication links would hinder the whole system functionality. Moreover, investigation of such optimization methods has been mainly limited to AC distribution systems; Optimal dispatch of DC distribution systems is largely underinvestigated. Alternatively, this work deigns a distributed controller to achieve optimal dispatch of DC sources by properly sharing the load among DC sources and synchronizing individual incremental costs. This synchrony leads to optimal dispatch of dc sources and secures the system performance against controller or communication link failures.Index Terms -Cooperative control, DC distribution system, Optimal dispatch. I. INTRODUCTIONEconomic dispatch is one of the most important studies in the power system realm. It seeks to coordinate sources to meet the total power demand while minimizing the total generation cost [1]- [5]. This is naturally a nonlinear optimization problem with solutions based on Lagrange multipliers theory [6], dynamic programming [7], or evolutionary algorithms [8]. These approaches are commonly implemented in a supervisory controller, called the tertiary controller, which handles communication, processing, and transmitting the decision to the sources. This central command unit is a data fusion and processing center that requires complex communication infrastructure and intricate computational machinery and poses a reliability concern [9]. In addition, prior knowledge of the system dynamics and load forecast is essential to the operation of the economic dispatch.Decentralized and distributed control approaches are introduced in the literature to handle economic dispatch with distributed computational units across the distribution grid. Limited message passing among these controller help to global coordination and economic dispatch. A distributed auction-based algorithm is presented in [10]. The consensusbased economic dispatch in [11] handles the supply-demand mismatch due to the transmission losses. Decentralized and scalable economic dispatch solutions for small-scale power systems are also discussed in [12]- [13].

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Team-Oriented Load Sharing in Parallel DC–DC Converters

Cited by 82 publications

References 34 publications

Review on Control of DC Microgrids

Review on Control of DC Microgrids

Looped-chain-based active current sharing strategy in DC microgrids

Distributed optimal dispatch for DC distribution networks

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