Distributed Dynamic Economic Dispatch of an Isolated AC/DC Hybrid Microgrid Based on a Finite-Step Consensus Algorithm

Ji, Ke; Wu, Feng; Zong, Xuanjun; Shi, Linjun; Lin, Keman

doi:10.3390/en12244637

Cited by 17 publications

(13 citation statements)

References 28 publications

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“…Remark 2. The main difference between this paper and the existing results [39,40,42] is that the hierarchical control thought is utilized in this paper. By the use hierarchical processing, the whole control strategy is divided into two parts, that is, the leadership layer control and the tracking layer control.…”

Section: Algorithm Design With Considering Constraintsmentioning

confidence: 92%

“…For discussing the economic operation of the hybrid AC/DC microgrid, a distributed control framework was proposed in Reference [40]. In References [41,42], a distributed economic dispatch method was developed based on the so-called finite-step consensus method, which could reach to the optimal solutions in finite steps. However, up to now, there are few results discussing hierarchical distributed strategy for the ED problem of the AC/DC hybrid microgrid.…”

Section: Literature Reviewmentioning

confidence: 99%

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Distributed Hierarchical Consensus-Based Economic Dispatch for Isolated AC/DC Hybrid Microgrid

Shi

et al. 2020

Energies

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In this paper, a distributed hierarchical consensus algorithm is proposed to solve the economic dispatch (ED) problem for the isolated AC/DC hybrid microgrid. At first, the whole nodes of the AC/DC hybrid microgrid are divided into two parts, that is, the leadership layer nodes and the tracking layer nodes. The leadership layer nodes update the data through their own feedback elements, while the tracking layer nodes receive the information from the leadership layer nodes and update the data. After several iterations, the two different layer nodes obtain the same state, which realizes the dynamic active power balance of the whole AC/DC microgrid. Besides, the AC sub-grid and DC sub-grid can also realize the power balance by the proposed algorithm, and the energy storage units will absorb or release active power to meet the power demand in the respective section. In addition, the constraints of the nodes are also taken into account to guarantee that the power nodes in the AC/DC hybrid microgrid should operate within their own limitations, which is necessary to realize the ED for the considered hybrid microgrid. Finally, case study and simulation results are provided to illustrate the effectiveness of the proposed hierarchal method.

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Section: Algorithm Design With Considering Constraintsmentioning

confidence: 92%

Section: Literature Reviewmentioning

confidence: 99%

Distributed Hierarchical Consensus-Based Economic Dispatch for Isolated AC/DC Hybrid Microgrid

Shi

et al. 2020

Energies

Self Cite

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“…The dispatch strategy has effect on the overall system cost and guides in designing a more economic and efficient system. In MGs, economic dispatch (ED) is used as a guideline to ensure economic and safe operation of the MG [16]. ED ensures the repletion of the demand at a reduced cost by scheduling the output of the predefined generation units and satisfying the system and all generation units' equality and inequality constraints [17].…”

Section: Introductionmentioning

confidence: 99%

“…Deterministic methods for ED problems are proposed in [23] but such approaches are not efficient for complex systems such as large-scale renewabledriven systems (e.g., battery charging and discharging scheduling, adjusting to uncertainty in solar and wind energy resources, generator back-up synchronization, considering dynamic loads), as they consider renewable sources as negative loads and they cannot take the uncertain character of the renewable energy sources into account [24]. In [16], a dynamic ED model was proposed for an AC/DC hybrid MG having a target of regular operating cost reduction.…”

Section: Introductionmentioning

confidence: 99%

Techno-Economic and Power System Optimization of a Renewable Rich Islanded Microgrid Considering Different Dispatch Strategies

et al. 2021

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In this work, the evaluation of the design and optimization of proposed offgrid hybrid microgrid systems for different load dispatch strategies is presented by assessing the component sizes, system responses and different cost analyses of the proposed system. This study optimizes the sizing of the Barishal and Chattogram (two popular divisions in Bangladesh) hybrid microgrid systems consisting of wind turbine, storage unit, solar PV, diesel generator and a load profile of 27.31 kW for five dispatch techniques: (i) generator order,l (ii) cycle charging, (iii)oad following, (iv) HOMER predictive dispatch and (v) combined dispatch strategy. The considered microgrids are optimized for the least CO gas emission, Net Present Cost, and Levelized Cost of Energy. The two microgrids are analyzed for the five dispatch techniques using HOMER software, and subsequently, the power system performance and feasibility study of the microgrids are performed in MATLAB Simulink. The results in this research provide a guideline to estimate different component sizes and probable costing for the optimal operation of the proposed microgrids under various load dispatch conditions. The simulation results suggest that 'Load Following' is the best dispatch strategy for the proposed microgrids having a stable power system response with the lowest net present cost, levelized cost of energy, operating cost, and CO 2 emission rate. Additionally, the combined dispatch strategy is determined to be the worst dispatch technique for proposed off-grid hybrid microgrid design having the maximum levelized cost of energy, net present cost, operating cost and CO 2 emission.

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“…Scholars have previously recommended using droop control, voltage regulation, and frequency response to improve microgrid stability [10][11][12][13][14]. For example, the author of [15] proposed self-learning fuzzy sliding mode control based on droop strategy to reduce bus voltage fluctuation and improve output voltage quality.…”

Section: Introductionmentioning

confidence: 99%

Distributed Economic Control for AC/DC Hybrid Microgrid

Wang

Yue

et al. 2021

Electronics

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In this paper, a new double-layer droop control mode for island AC/DC microgrids is proposed to realize autonomous and cost-effective operation. The optimal power reference iterative algorithm is used to realize the internal active power distribution in the subnet. On this basis, secondary frequency and voltage adjustments are introduced to realize the economic operation, autonomy and stability of the subnet. At the microgrid level, the local control strategy of cost micro increment deviation is designed to optimize the exchange power between subnets. The cooperation of the two can realize the global economic operation of the microgrid, as well as voltage following and frequency regulation in the subnet. Based on the hybrid AC/DC microgrid simulation model, the effectiveness of the proposed method is verified.

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Distributed Dynamic Economic Dispatch of an Isolated AC/DC Hybrid Microgrid Based on a Finite-Step Consensus Algorithm

Cited by 17 publications

References 28 publications

Distributed Hierarchical Consensus-Based Economic Dispatch for Isolated AC/DC Hybrid Microgrid

Distributed Hierarchical Consensus-Based Economic Dispatch for Isolated AC/DC Hybrid Microgrid

Techno-Economic and Power System Optimization of a Renewable Rich Islanded Microgrid Considering Different Dispatch Strategies

Distributed Economic Control for AC/DC Hybrid Microgrid

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