Essays about: "Voltage measurement Transformer"

Showing result 1 - 5 of 9 essays containing the words Voltage measurement Transformer.

1. 1. Monitoring of Partial Discharges on Cable Terminations : An experimental approach to evaluate non-conventional online PD measurement techniques

   University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Author : Tony Sibo; [2023]
   Keywords : Monitoring; Partial discharges; Medium-voltage cable terminations; Sensor performance; Reliability evaluation; Infrared camera IR-camera ; Ultrasonic emission sensor AE-sensor ; Temperature and relative humidity sensor TRH-sensor ; High frequency current transformer HFCT ; Transient earth voltage antenna TEV-antenna ; Conventional VS non-conventional PD measurement techniques; Övervakning; Partiella urladdningar; Mellanspänningskabelslut; Evaluering av sensorprestanda; Utvärdering av systemets tillförlitlighet; Infraröd kamera; Ultraljudssensor; Temperatur- och relativ fuktighetssensor; Högfrekvent strömtransformator; Transient jordspänningsantenn; Konventionella vs icke-konventionella mättekniker;

   Abstract : The transmission of electric power over long distances has historically posed challenges. However, the advent of high-voltage engineering has not only addressed distance barriers and power losses in electricity transmission and distribution, but it has also significantly improved the efficiency and transmission capacity of power grids. READ MORE

3. 2. Analysis of factory test data of on-load tap-changers for power transformers

   University essay from Uppsala universitet/Avdelningen för systemteknik

   Author : Oscar Stenhammar; [2021]
   Keywords : on-load tap-changer; OLTC; power transformer;

   Abstract : On-load tap-changers (OLTC) are devices in the power grid that keeps the voltage level constant for consumers, regardless of the power demand. Hitachi ABB Power Grids, producer of the OLTC family named VUC, guarantees 30 years of lifetime. Such a pledge requires high standard devices. READ MORE

4. 3. Investigation of ion mobility in insulation liquids for transformers.

   University essay from

   Author : Bruce Dondogori; [2020]
   Keywords : ;

   Abstract : This thesis studies a method of measuring ion mobility in insulation liquids for transformers (transformer oil). This method works by using a square wave voltage to make the charged particles (space charge) inside the oil move between two electrodes. READ MORE

5. 4. Predictive Maintenance and Data Analysis in Ellevio's Distribution Grid

   University essay from Uppsala universitet/Institutionen för teknikvetenskaper

   Author : Joshua Odekvist; Robert Antar; [2019]
   Keywords : ;

   Abstract : As part of the international EU project Integrid, Ellevio has started a pilot project where measurement equipment has been installed in secondary substations in Stockholm Royal Seaport. The purpose of the pilot project is to improve operation, maintenance and future planning of the grid. READ MORE

6. 5. A Differential Measurement Probe with High Common Mode Rejection

   University essay from Lunds universitet/Industriell elektroteknik och automation

   Author : Björn Franzén; [2018]
   Keywords : Common mode rejection; Fiber-optic measurement probe; Current Sensing; High voltage measurements; Optical isolation; Technology and Engineering;

   Abstract : Measuring signals with high frequency common mode components are typically prone to measurement errors due to low common mode rejection at high frequencies. The purpose of this master thesis is to design a measurement probe that presents sufficient common mode rejection to measure current on high voltage motor drives directly at the switching stage, before filtering. READ MORE