Coordinated charging of plug-in hybrid electric vehicles in smart hybrid AC/DC distribution systems

Shaaban, Mostafa F.; Eajal, A. A.; El-Saadany, Ehab F.

doi:10.1016/j.renene.2014.08.012

Cited by 66 publications

(31 citation statements)

References 29 publications

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“…The ICT, ADA, control, advanced protection, PE, protection, and measurement technologies are inevitable, mainly for REG/DER integration connected to DN with PE converters and supported by energy storage systems (ESSs) [36][37][38][39][40][41][42][43][44][45][46]. The aforementioned technologies can be employed to address and possibly prevent undesired conditions [8], notably voltage instability (sag and swell) conditions, resulting in grid instabilities (voltage, frequency, and angular stability), faults and loss of DERs synchronization.…”

Section: Smooth Sgci Realization (Sgcir)mentioning

confidence: 99%

Smart Distribution Networks: A Review of Modern Distribution Concepts from a Planning Perspective

et al. 2017

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Smart grids (SGs), as an emerging grid modernization concept, is spreading across diverse research areas for revolutionizing power systems. SGs realize new key concepts with intelligent technologies, maximizing achieved objectives and addressing critical issues that are limited in conventional grids. The SG modernization is more noticeable at the distribution grid level. Thus, the transformation of the traditional distribution network (DN) into an intelligent one, is a vital dimension of SG research. Since future DNs are expected to be interconnected in nature and operation, hence traditional planning methods and tools may no longer be applicable. In this paper, the smart distribution network (SDN) concept under the SG paradigm, has presented and reviewed from the planning perspective. Also, developments in the SDN planning process have been surveyed on the basis of SG package (SGP). The package presents a SDN planning foundation via major SG-enabling technologies (SGTF), anticipated functionalities (SGAF), new consumption models (MDC) as potential SDN candidates, associated policies and pilot projects and multi-objective planning (MOP) as a real-world optimization problem. In addition, the need for an aggregated SDN planning model has also been highlighted. The paper discusses recent notable related works, implementation activities, various issues/challenges and potential future research directions; all aiming at SDN planning.

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Section: Smooth Sgci Realization (Sgcir)mentioning

confidence: 99%

Smart Distribution Networks: A Review of Modern Distribution Concepts from a Planning Perspective

et al. 2017

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“…In addition, according to Equation (16), the modulation degree M can be obtained. Then, the power flow calculation based on the forward-backward sweep of the AC/DC hybrid DN with VSC-MTDC is determined.…”

Section: B Calculate the Backward Voltagementioning

confidence: 99%

“…The average annual investment cost coefficient of the DG is 0.1, and the power factor is 0.85. Considering the proportion of the DC load in each load node, the candidate nodes for the DG are 7,10,12,13,14,16,17,18,19,20,22,23,24,25,26,29,30,31, and 32. The minimum unit capacity of the grid-connected DG is 60 kVA, and if the grid-connected cardinal number is m (m = 0, 1, 2, .…”

Section: Node Proportion Of DC Load Node Proportion Of Dc Loadmentioning

confidence: 99%

Multi-Objective Coordinated Planning of Distributed Generation and AC/DC Hybrid Distribution Networks Based on a Multi-Scenario Technique Considering Timing Characteristics

et al. 2017

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With increased direct current (DC) load density and the penetration of a large number of distributed generation (DG) units in alternating current (AC) distribution networks (DNs); a planning approach that considers transforming some of the AC lines into DC lines and building the DC network is proposed. Considering the DG output uncertainty and the load fluctuation, a planning model for an AC/DC hybrid distribution network (DN) with the DG based on the construction of multi-scenario technology with timing characteristics is built. In the DG configuration planning model, the lines to be transformed into DC form the access location and the decision regarding the DC or AC form of the newly built lines are considered optimizing variables. The DG investment, the network and converters of the DG and load, the active power loss and the voltage stability are considered in the objective functions. An improved adaptive niche genetic algorithm based on the fuzzy degree of membership and variance weighting is used to solve the nested model. Finally, considering the improved electrical and electronic engineers 33 (IEEE33) node system as an example, the correctness and effectiveness of the proposed planning method are verified. Compared to the plan without transforming some of the AC lines into DC lines and building a DC network, more DG can be admitted, and the economic cost of the AC/DC hybrid DN is notably decreased when planning to transform some of the AC lines into DC lines and build a DC network. The active power network loss and the voltage stability index are similarly further optimized.

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“…The term "hybrid AC/DC microgrid" conventionally refers to a microgrid that includes a conventional AC distribution system, as illustrated in Figure 1, and an extension DC grid that is connected to the AC system through one or more parallel bidirectional converters, as illustrated in Figure 2 [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. In the present study, a new design for a hybrid AC/DC microgrid is proposed, while the two back-to-back (B2B) series and parallel converters are connected between AC and DC microgrids, as shown in Figure 3.…”

Section: Hybrid Ac/dc Microgrid Structurementioning

confidence: 99%

A new proposal for the design of hybrid AC/DC microgrids toward high power quality

Khorasani¹,

Joorabian²,

Seifosadat³

2017

Turk J Elec Eng & Comp Sci

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Considering the advantages of DC microgrids, the extension of the conventional AC distribution grid can be implemented using a DC microgrid. This justifies the realization of a hybrid AC/DC microgrid. In the present study, a new global solution is presented to improve the power quality and to fully compensate the reactive power of an AC microgrid using DC bus capacity while introducing a new design for a hybrid AC/DC microgrid. In the new design, backto-back connections of two series and parallel converters, as well as the presentation of new controllers and simultaneous utilization of an earthing switch, are proposed. The proposed method guarantees the quality of the delivered voltage to consumers and the drawn current from the network according to the IEEE-519 and IEEE-1159 standards under different power quality problems (e.g., interruptions, sags, harmonics, and any variation in voltage/current signals from pure sinusoidal). Through the proposed design of the new hybrid AC/DC microgrid, as a new feature, the operation of the network in islanded mode can be achieved in accordance with power quality standards even in the worst load quality conditions. It should be noted that in common hybrid microgrids in islanded mode, the delivered voltage quality is proportional to the quality of the consumer's load current. Another possibility of the proposed design is the instantaneous VAR compensation of nonlinear and induction loads of consumers to keep the power factor of the distribution transformer close to unit value. Simulation results indicate that there are acceptable levels of compensation for different types of power quality problems. Total harmonic distortions and total demand distortions are below 3% in both the grid-connected and isolated modes of the hybrid AC/DC microgrid.

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Coordinated charging of plug-in hybrid electric vehicles in smart hybrid AC/DC distribution systems

Cited by 66 publications

References 29 publications

Smart Distribution Networks: A Review of Modern Distribution Concepts from a Planning Perspective

Smart Distribution Networks: A Review of Modern Distribution Concepts from a Planning Perspective

Multi-Objective Coordinated Planning of Distributed Generation and AC/DC Hybrid Distribution Networks Based on a Multi-Scenario Technique Considering Timing Characteristics

A new proposal for the design of hybrid AC/DC microgrids toward high power quality

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