Fault Ride-Through Capability Enhancement for Microinverter Applications

Ansari, Sajad Arab; Mizani, Amirreza; Ashouri, Siamak; Moghani, Javad Shokrollahi

doi:10.1155/2019/1036156

Cited by 10 publications

(4 citation statements)

References 33 publications

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“…Environment-dependent RE technology, such as solar and wind, is prone to the effects of voltage fluctuations. Therefore, when there is fluctuation present in the grid, overvoltage relay will trip off to protect the inverter [88]. However, for this reason, this would not be feasible as it would indirectly compromise the availability and reliability of PV generation in the distribution grid system.…”

Section: Voltage Disturbancementioning

confidence: 99%

Distributed Generation: A Review on Current Energy Status, Grid-Interconnected PQ Issues, and Implementation Constraints of DG in Malaysia

et al. 2020

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Electric supply is listed as one of the basic amenities of sustainable development in Malaysia. Under this key contributing factor, the sustainable development goal aims to ensure universal access to an affordable, clean, and reliable energy service. To support the generation capacity in years to come, distributed generation is conceptualized through stages upon its implementation in the power system network. However, the rapid establishment growth of distributed generation technology in Malaysia will invoke power quality problems in the current power system network. In order to prevent this, the current government is committed to embark on the development of renewable technologies with the assurance of maintaining the quality of power delivered to consumers. Therefore, this research paper will focus on the review of the energy prospect of both fossil fuel and renewable energy generation in Malaysia and other countries, followed by power quality issues and compensation device under a high renewable penetration distribution network. The issues and challenges of distributed generation are presented, with a comprehensive discussion and insightful recommendation on future work of the distributed generation. In accordance with the addressed highlights in this paper, it would serve as the criterion on upcoming revolution of distributed generation integrated along with the traditional network in Malaysia.

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Section: Voltage Disturbancementioning

confidence: 99%

Distributed Generation: A Review on Current Energy Status, Grid-Interconnected PQ Issues, and Implementation Constraints of DG in Malaysia

et al. 2020

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“…Depending on the voltage drop value, the requirements of LVRT are different regarding the duration of the fault and the quantity of the reactive power injected [17], [18]. These requirements to ensure the PV ISSN: 2088-8694  system remains connected to the grid and operated when the grid's voltage decreases by supplying the grid with the required reactive current in the specified voltage range and supporting the grid also with the maximum output power generation [19]− [22], It means, in case there is a drop in the voltage of the grid, the LVRT strategy determines the required injected reactive currents according to the amount of voltage decreasing of the three-phase grid.…”

Section: Introductionmentioning

confidence: 99%

Impact of on-grid solar energy generation system on low voltage ride through capability

Shawqi¹,

Abdallah²,

Nassar

2022

IJPEDS

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This paper represented a control strategy for photovoltaic (PV) system, this control strategy was referred to as a low voltage ride through (LVRT), it had been achieved by using three phase (3-PH) (PV) grid-connected system, where this paper discussed the way to achieve maximum output active power from the solar system, while the solar system remained connected to the grid with voltage decreasing controller techniques and this was valid until certain amount of voltage decreasing which was clarified in the results. The main goal of low voltage ride through depended on injecting reactive power to the grid, amount of the injected reactive power depended on regulations of the grid code using the control of the inverter and the strategy depended on the grid voltage drop amount. MATLAB simulation had been used to achieve what was mentioned above, which led to present various cases of achieving maximum output active power with grid voltage drops by using conventional proportional integral (PI) control of the inverter. Finally, another control method, which was proportional integral genetic algorithm (PI-GA), had been used to improve value of the generated output active power.

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“…It is chosen because of its simple structure and very low ripple input current, which is necessary for renewable energy applications. In addition, among renewable energy systems, modern AC-PV module (microinverter) systems have received increased attention due to their unique advantages, for example, resolving the negative influences of partial shading, higher maximum power point tracking efficiency, higher flexibility and reliability, friendly plug-and-play capability, and simple installation [25,26]. Therefore, the performances of the aforementioned converters are compared when their characteristics in terms of voltage and power are designed to be used in microinverter applications.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of silicon MOSFETs and GaN HEMTs in soft‐switched and hard‐switched DC‐DC boost converters for domestic PV applications

Ansari

Davidson

Foster

2021

IET Power Electronics

Self Cite

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Hard-switched high-gain DC-DC converters such as the boost converter play an important role in renewable energy systems. Research to increase their efficiency is important and can be achieved using soft-switching techniques; however, that approach requires an auxiliary circuit. The auxiliary circuit decreases power density and reliability while increasing the cost. Moreover, soft-switching topologies usually cannot improve the efficiency for all power and voltage ranges. Wide bandgap (WBG) devices, such as gallium nitride (GaN), result in lower switching losses than silicon (Si), can be used while retaining the simple structure of a hard-switched topology. However, the high cost of these devices is problematic for their frequently cost-sensitive applications. To quantify the cost and efficiency, this study compares soft-switching techniques and WBG-based switches in DC-DC boost converters for a photovoltaic (PV) energy application. The performance of four prototypes including the soft-switched and hard-switched DC-DC converters with both stateof-the-art Si and GaN switches are evaluated in terms of cost, power density, efficiency, and reliability using theoretical analysis, simulation and experimental results. It is shown that the GaN-based hard-switched converter provides higher efficiency and power density; it is more expensive than its Si-based counterpart, yet is cheaper than soft-switched converters. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Fault Ride-Through Capability Enhancement for Microinverter Applications

Cited by 10 publications

References 33 publications

Distributed Generation: A Review on Current Energy Status, Grid-Interconnected PQ Issues, and Implementation Constraints of DG in Malaysia

Distributed Generation: A Review on Current Energy Status, Grid-Interconnected PQ Issues, and Implementation Constraints of DG in Malaysia

Impact of on-grid solar energy generation system on low voltage ride through capability

Evaluation of silicon MOSFETs and GaN HEMTs in soft‐switched and hard‐switched DC‐DC boost converters for domestic PV applications

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