Results 211 to 220 of about 316,613 (266)
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Double voltage step-up photovoltaic microinverter
2017 IEEE International Conference on Industrial Technology (ICIT), 2017In conventional photovoltaic microinverters configuration, a single PV module is connected to the grid through two converter stages: a step-up dc-dc stage and a step-down dc-ac stage. In the first stage, a high frequency transformer is generally used to achieve the high step-up voltage ratio conversion to a voltage above the grid peak value, reducing ...
Diana López +3 more
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Protecting Workers from Step Voltage Hazards
IEEE Technology and Society Magazine, 2016Occupational accidents still occur, despite technical developments in the occupational safety field at large. The experience of being harmed at work can be devastating, with profound consequences for employees, their families, friends, and work colleagues. Many consequences cannot be measured directly, such as pain suffered.
Aikaterini D. Baka, Nikolaos K. Uzunoglu
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Integration of step voltage regulators in islanded microgrids
2017 IEEE International Conference on Industrial Technology (ICIT), 2017Step voltage regulators (SVRs) are the workhorses of existing distribution feeders, where they provide appropriate voltage control to meet the customer demands. Given the special features and operation characteristics of islanded microgrids (IMGs), the role of SVRs during the operation of distribution networks in islanded mode has not been well ...
Nader A. El-Taweel +1 more
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Simplified conservative measurements of touch and step voltages
1999 IEEE Industrial and Commercial Power Systems Technical Conference (Cat. No.99CH36371), 2003Protection against electric shock requires grounding systems that must be designed primarily to keep touch voltage (E/sub t/) and step voltage (E/sub s/) to a safe value. Testing of the efficiency of a grounding system is mandatory to verify the capability to satisfy the protection requirements at the end of the construction and periodically in the ...
PARISE, Giuseppe, GRASSELLI, Umberto
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Voltage depending load models. Validation by voltage step tests
2006 IEEE Power Engineering Society General Meeting, 2006This paper presents applications of the exponential static load model used to represent voltage depending loads. This model has been used to represent loads of different types: industrial, residential and of petroleum extraction fields. These loads belong to "Sistema Interconectado Patagonico" (SIP), a small power system of 1200 MW of peak load ...
J.L. Aguero, M.B. Barbieri, M.C. Beroqui
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Step type feeder voltage regulators
Electrical Engineering, 1935Discussion and author's closure of a paper by L H. Hill published in the February 1935 issue, pages 154–8, and presented for oral discussion at the distribution and transmission session of the South West District meeting, Oklahoma City, Okla., April 26, 1935. F. L. Snyder (Westinghouse Elec. and Mfg.
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2015
In the present chapter, the main types of energy conditioning systems will be summarily characterized, as well as energy storing devices and MPPT techniques. Raw electrical energy captured from the ambient sources is generally not suitable for direct usage to power electronic circuits. As such, this energy must be properly conditioned for practical use.
Carlos Manuel Ferreira Carvalho +1 more
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In the present chapter, the main types of energy conditioning systems will be summarily characterized, as well as energy storing devices and MPPT techniques. Raw electrical energy captured from the ambient sources is generally not suitable for direct usage to power electronic circuits. As such, this energy must be properly conditioned for practical use.
Carlos Manuel Ferreira Carvalho +1 more
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Development of High Voltage Multilevel Step-wave Voltage Source
2018 IEEE International Power Modulator and High Voltage Conference (IPMHVC), 2018With the development of energy Internet, the proportion of modular multilevel converter in the system further increases. High-voltage multilevel stepped waves become a typical waveform stressed on the related insulation. In order to study the insulation characteristics of equipment under multilevel stepped wave stress, it is necessary to develop a high-
Geqi Li +5 more
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2017 International Conference on Industrial Engineering, Applications and Manufacturing (ICIEAM), 2017
There is a dangerous zone of step voltage in 6-35 kV power networks with an isolated neutral in the emergency mode caused by a ground fault about a point of damage. People and animals occurring in the step voltage area face a severe danger of electrical shock and even death.
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There is a dangerous zone of step voltage in 6-35 kV power networks with an isolated neutral in the emergency mode caused by a ground fault about a point of damage. People and animals occurring in the step voltage area face a severe danger of electrical shock and even death.
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A comparative study of two-step anodization with one-step anodization at constant voltage
Nanotechnology, 2022Abstract Two-step anodization has been widely used because it can produce highly self-organized anodic TiO2 nanotubes, but the differences in morphology and current-time curve of one-step anodization and two-step anodization are rarely reported. Here, one-step anodization and two-step anodization were conducted at different voltages.
Huipeng Zeng +6 more
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