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Mohammed El-Nagar, Khaled Ahmed, Eman Hamdan, Ayman S. Abdel-Khalik, Mostafa S. Hamad and Shehab Ahmed
Proper operation of the grid-tie transformerless converters under unbalanced and distorted conditions entails a precise detection of the frequency and fundamental component of the grid voltage. One of the main problems that could arise during the estimat...
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Feng Xu, Xiaoming Huang, Yi Lu and Zheren Zhang
This paper focuses on the soft normally open point (SNOP) which has no transformers and connects to the 10 kV distribution network through the arc suppression coil grounding mode. A mathematical model containing positive-, negative-, and zero-sequence co...
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Wenjie Liu, Yongheng Yang, Tamas Kerekes, Elizaveta Liivik, Dmitri Vinnikov and Frede Blaabjerg
In transformerless grid-connected photovoltaic (PV) systems, leakage currents should be properly addressed. The voltage fluctuations between the neutral point of the grid and the PV array, i.e., common-mode voltage (CMV), will affect the value of the lea...
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Javed Ahmad, Mohammad Zaid, Adil Sarwar, Chang-Hua Lin, Shafiq Ahmad, Mohamed Sharaf, Mazen Zaindin and Muhammad Firdausi
In this paper, a new transformerless high voltage gain dc-dc converter is proposed for low and medium power application. The proposed converter has high quadratic gain and utilizes only two inductors to achieve this gain. It has two switches that are ope...
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Marian Liberos, Raúl González-Medina, Gabriel Garcerá and Emilio Figueres
This paper presents a control structure for transformerless photovoltaic inverters connected in parallel to manage photovoltaic fields in the MW range. Large photovoltaic farms are usually divided into several photovoltaic fields, each one of them manage...
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Juan R. Rodriguez-Rodríguez, Vicente Venegas-Rebollar and Edgar L. Moreno-Goytia
This paper introduces an advanced transformerless multilevel hybrid-conversion topology intended for the interconnection of renewable DC sources at small-scale. The most important contribution presented in this paper is the generation of two isolated DC...
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Atanda K. Raji, Mohamed T. E. Kahn
The problems of increasing electricity demand by the unabated population and economy growth can be solved by employing sustainable distributed generation technologies. Convectional primary energy sources such as coal, liquid hydrocarbons? and natural gas...
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Li, B. H. Choi, S. S. Vilathgamuwa, D. M.
Pág. 263 - 273
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