Alternating Voltage Tests on Distribution Transformers Using Static Frequency Converters
نویسندگان
چکیده
This paper presents experience in performing alternating voltage measurements on distribution transformers using a static frequency converter without particular control scheme. Regarding induced voltage tests, no-load and load measurements, the quality, i.e. the degree of distortion and the symmetrical shape, of the generated test voltage, deviations in measured power and the relation between demand for reactive power and frequency and level of the provided voltage are discussed.
منابع مشابه
Dc Transmission Based on Voltage Source Converters
Voltage Source Converters (VSC) have for the first time been used for HVDC transmission in a real network. Experience from the design and commissioning of the transmission shows that the technology has now reached the stage where it is possible to build high voltage converters utilising Insulated Gate Bipolar Transistors (IGBTs). Operation and system tests have proved that the properties that h...
متن کاملA New Resonant Modular Multilevel Step-Down DC-DC Converter with Inherent-Balancing
Modular multilevel converters (MMCs) have become increasingly interesting in dc-dc applications, as there is a growing demand for dc-dc converters in high voltage applications. Power electronics transformers (PETs) are commonly used for high step-down ratio dc-dc power conversion, with high power rating and efficiency achieved. However, this arrangement requires a large number of high isolation...
متن کاملHVDC Feeder Solution for Electric Railways
For AC railway power supply systems with a different frequency than the public grid, high-voltage AC (HVAC) transmission lines are common, connected to the catenary by transformers. This paper suggests an alternative design based on an HVDC (High Voltage DC) feeder, which is connected to the catenary by converters. Such an HVDC line would also be appropriate for DC-fed railways and AC-fed railw...
متن کاملAnalysis of High Frequency Planar Sandwich Transformers for Switching Converters
This paper presents the results of investigations on a planar sandwich air-gapped transformer with two different winding configurations. Experimental results of the coil self inductances, voltage ratio versus frequency, and the numerical results for the magnetic flux and eddy-current distributions are presented. It is shown that the voltage ratio and turns ratio are not equivalent and that the ...
متن کاملFrequency Tracking to Maximum Power of Piezoelectric Transformer HV Converters under Load Variations
The problem of maximum power point tracking of high output DC voltage converters that apply Piezoelectric Transformers (PT) and voltage doublers was studied theoretically and experimentally. It was shown that the operating frequency of the PT, at which maximum voltage gain is reached, is a function of the load. Hence, under load variations, and to overcome parameters instability, there is a nee...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2009