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Showing 1 to 11 of 11 for “"Voltage Transformer"”.
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Partial discharge signal propagation, modelling and estimation in high voltage transformer windings
… partial discharge (PD) propagation within a high voltage transformer winding. Location of PDs and magnitude estimation are important tools for both diagnosis and prognosis of the health of large transformers. In reality there is limited access and knowledge of a winding and consequently any …
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Protection of High-Voltage Transformer Bushings and Other Brittle Structures Against Impact
… of the impact behavior of porcelain high-voltage (HV) transformer bushings under high-velocity impact, with a focus on their protection with feasible methods which could be quickly applied in service to prevent vandalism and other undesirable impact situations. The bushings are brittle and …
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Magnetic augmented rotation system (MARS ) - properties and performance
… 12 volts, a load in the form of a light bulb, a voltage transformer, and digital multimeter to monitor current/voltage in real-time. Additionally, infrared imaging is utilized during charging the rechargeable battery to monitor changes in temperature.
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Protection system representation in the Electromagnetic Transients Program
… A protection system consists of instrument transformers, relays, and circuit breakers. Models for current transformers and capacitor voltage transformers are developed, validated, and incorporated in EPRI/DCG EMTP Version 2.0. The user can define the values of the current transformer and …
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Synchronized Phasor Measurement Units Applications in Three-phase Power System
… of power system. By aligning time stamps of voltage and current phasor measurements, which are consistent with Coordinated Universal Time (UTC), a coherent picture of the power system state can be achieved through either direct measurements or simple linear calculations. With the growing …
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Radiometric partial discharge characterisation
… systems especially in power equipment such as transformers and circuit breakers, the cost of which is very high. Before the insulation fails, there are manifestations of this condition, called partial discharges (PD) and because of this, PD have been subject of an extensive study and …
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Improved Resonant Converters with a Novel Control Strategy for High-Voltage Pulsed Power Supplies
The growing demand for high voltage, compact pulsed power supplies has gained great attention. It requires power supplies with high power density, low profile and high efficiency. In this thesis, topologies and techniques are investigated to meet and exceed these challenges. Non-isolation type …
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Partial Discharge Detection and Localization in High Voltage Transformers Using an Optical Acoustic Sensor
… of localized electric field intensity. In high voltage devices such as transformers, this buildup of charge and its release can be symptomatic of problems associated with aging, such as floating components and insulation breakdown. This is why PD detection is used in power systems to monitor the …
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Hybrid Modular Multilevel Converter Family and Modular DC Circuit Breaker for Medium-voltage DC (MVDC) Applications
… and flexibility of power electronics-based voltage conversion techniques, DC grids, and distribution systems have gained significant interest. These systems offer advantages such as improved power quality, efficiency, and flexibility. Medium-voltage DC (MVDC) applications, including …
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Detection and Position Location of Partial Discharges in Transformers Using Fiber Optic Sensors
Power transformers are one of the most important components in the electrical energy network. Extending transformer life is very economically valuable due to power outage. Therefore the development of instruments to monitor the transformer condition is of great interest. Detection of partial …
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High-frequency Power Conversion for Medium Voltage Power Electronics Interfaces
… efficient energy conversion, the field of medium voltage power conversion has experienced significant progress in recent years. This progress is driven by its high efficiency and improved scalability. Medium voltage power conversion finds applications in various areas such as data centers, …