Performance enhancement of hybrid AC/DC microgrid based D-FACTS

Abdelsalam, Abdelazeem A.; Gabbar, Hossam A.; Sharaf, A.Μ.

doi:10.1016/j.ijepes.2014.06.003

Cited by 53 publications

(22 citation statements)

References 32 publications

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“…A typical configuration of a fixed speed wind turbine, as shown in Figure is used . The output power ( P m ) supplied from the wind turbine is given as follows:

P_{m} = 0.5 normalρ A C_{P} ((),, λ, β) V_{W}^{3}

where ρ is the air density, A is the rotor swept area, V w is the wind speed, and C p (λ, β) is the power coefficient as a function of the tip speed ratio λ and the pitch angle β.…”

Section: The System Under Studymentioning

confidence: 99%

“…

u ((), t) = K_{pt} e_{T} ((), t) + K_{it} \int_{0}^{t} e_{T} ((), t) normald t + K_{normald 2} \frac{(normald (e_{T} true(t true)}{normald t}

where e T ( t ) is the selected system error, u ( t ) is the control variable, K p is the proportional gain, K i is the integral gain, and K d is the derivative gain. In this work, the triloop error‐driven controller is used with a traditional PID controller, where the PID controller gains ( K p , K i , and K d ) are based on a trade‐off between design goals such as total error minimization and step‐by‐step trials …”

Section: The System Under Studymentioning

confidence: 99%

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Distributed FACTS stabilization scheme for efficient utilization of distributed wind energy systems

Gandoman

Sharaf²,

Aleem

et al. 2017

Int Trans Electr Energ Syst

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Summary Because of the growing usage of wind energy systems worldwide, more challenges in power quality and microgrid stabilization domains have emerged. In this paper, a new distributed FACTS‐based green plug‐switched filter capacitor (GP‐SFC) filter is presented for efficient utilization of microgrid‐connected wind energy systems. The primary goals are improving the energy use, stabilizing voltage dynamically, enhancing power quality, and improving the power factor at the common interface AC buses of the microgrid‐connected wind system. The proposed GP‐SFC topology is modelled and simulated using MATLAB/Simulink software. A dynamic multiloop error‐driven controller is proposed for adjusting the pulse switching pattern of the variable speed wind turbine system. In addition to the low cost of the proposed GP‐SFC filter, the results show that it can promote the use of wind energy system under load changes and temporary fault conditions. Besides, the proposed GP‐SFC guarantees high‐speed controllability while maintaining its capability for power factor correction and voltage support using its switched shunt capacitor. Also, the system performance with the proposed filter is compared with the system with a conventional D‐STATCOM compensator. The results validate the effectiveness and robustness of the GP‐SFC topology.

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“…A typical configuration of a fixed speed wind turbine, as shown in Figure is used . The output power ( P m ) supplied from the wind turbine is given as follows:

P_{m} = 0.5 normalρ A C_{P} ((),, λ, β) V_{W}^{3}

where ρ is the air density, A is the rotor swept area, V w is the wind speed, and C p (λ, β) is the power coefficient as a function of the tip speed ratio λ and the pitch angle β.…”

Section: The System Under Studymentioning

confidence: 99%

“…

u ((), t) = K_{pt} e_{T} ((), t) + K_{it} \int_{0}^{t} e_{T} ((), t) normald t + K_{normald 2} \frac{(normald (e_{T} true(t true)}{normald t}

Section: The System Under Studymentioning

confidence: 99%

Distributed FACTS stabilization scheme for efficient utilization of distributed wind energy systems

Gandoman

Sharaf²,

Aleem

et al. 2017

Int Trans Electr Energ Syst

Self Cite

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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%

“…To this end, appropriate control schemes are developed to control the interlinking converter [12][13][14][15][16]. The concept of introducing some DC islands interconnected with the AC distribution network using an additional DC power line to collect energy generated by the distributed domestic renewable sources was presented in [17,18]. A new hybrid AC/DC microgrid design based on distribution FACTS devices and that aims to enhance microgrid operation performance, such as stabilization of the bus voltage, reduction of the feeder losses, and improvements to the power factor, has been introduced by several authors [19][20][21].…”

Section: Introductionmentioning

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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“…In recent years smart power grids with renewable energy sources have received increased public attention due to the need, to protect a network from large blackouts, reduce power losses, integrate renewable and sustainable energy generation on a small scale and improve power quality [1], [2]. The sporadic nature of wind speed and solar irradiation make these energy sources intermittent and leading to imbalances [3], [4], [5].…”

Section: Introductionmentioning

confidence: 99%

Resilient micro energy grids with gas-power and renewable technologies

Bower

Pandya

Agarwal

et al. 2014

The 2nd IEEE Conference on Power Engineering and Renewable Energy (ICPERE) 2014

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The world is moving towards smart energy grid with green and clean infrastructure which will enable efficient bidirectional energy supply with reduced carbon footprint. Due to increasing energy demands and the pressing issues of efficient energy use, there is a real need to increase the penetration of gas technologies in the power grid. The government of Canada and stakeholders are looking for ways to increase the reliability and sustainability of the power grid; and gas-power technologies may provide a solution. This paper explores the integration of gas and renewable energy generation technologies within various electricity generation scenarios with the goal of developing designs for a resilient micro energy grid (MEG). The distinct scenarios are then evaluated using an advanced algorithm to provide optimum scenario depending on various key performance indicators (KPIs). KPIs to be examined include: economic, power quality, reliability, and environmental friendliness. This work is done using three different systems; geographic information system (GIS) for recording transmission /distribution lines and generation data, a database to store the information, and a MATLAB-based algorithm for evaluating scenarios. These systems are synthesized and represented into a graphical user interface (GUI), where the user defines the zone, area and cell for desired output and system parameters to generate distinct scenarios to identify the optimum generation.

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Performance enhancement of hybrid AC/DC microgrid based D-FACTS

Cited by 53 publications

References 32 publications

Distributed FACTS stabilization scheme for efficient utilization of distributed wind energy systems

Distributed FACTS stabilization scheme for efficient utilization of distributed wind energy systems

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

Resilient micro energy grids with gas-power and renewable technologies

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