Recent results on the Power Quality of Italian 2x25 kV 50 Hz railways
نویسندگان
چکیده
The recordings of the pantograph voltage and current waveforms across Italian and French high speed railway lines (both Autotransformer 2x25 kV 50 Hz systems) are analyzed to estimate some Power Quality indexes: harmonic spectra, harmonic distortion, displacement factor and fundamental component, in various rolling stock operating conditions. These indexes, that define the electrical interface between the rolling stock and the power supply, are all relevant in order to assess both the impact of the rolling stock on the network and the suitability of the latter to ensure agreed performances (electrical interoperability).
منابع مشابه
Steady State and Transient Short Circuit Analysis of 2x25 kV High Speed Railways
In the paper, a detailed model for the short circuit analysis of the AC 2x25 kV-50 Hz traction system has been derived and implemented. Two different methods have been used: the time domain and frequency domain approaches. The two approaches are discussed and numerical applications are reported. In particular, in order to assess the feasibility of both the two methodologies, the results have be...
متن کاملProtection setting in 2x25 kV 50 Hz railway traction systems by digital simulation
In this paper, after a short description of the problems related to the detection of short circuits in 2x25 kV 50 Hz traction systems, a methodology for the choice of the operating area of the relay for protections based on the comparison between a measured line impedance and a fixed minimum impedance is presented. The proposed methodology has been realized through the development of a procedur...
متن کاملAn integrated methodology for 2 x 25 kV , 50 Hz traction system calculation
The paper describes an integrated calculation methodology which, by simulating railway traffic, allows analysis of the performance of 2x25 kV 50 Hz electric traction systems. This methodology performs a multiconductor electrical analysis of the traction circuit utilising ATP-EMTP software (Alternative Transient Program-Electromagnetic Transient Program) and therefore additionally allows calcula...
متن کاملHarmonic Elimination of 25 kV AC Electric Railways Utilizing a New Hybrid Filter Structure
Thyristor rectifiers are widely used in electric railways in order to control the speed. As a consequence of their usage in addition to substantial input lead current, an enormous amount of harmonics is injected into the grid. To avoid such harmonics as well as reactive power compensation, reactive power hybrid filters consisting of active and passive filters are utilized. Regarding different p...
متن کاملMeasurements on 25 kV Traction Power Supply Systems
At the moment 25 kV traction power supply systems are being introduced in the Netherlands. Currently in the Netherlands a 1500 V DC system is used, however due to increasing energy demands this system is no longer sufficient. For the high-speed lines and heavy freight lines, which are under construction, the 2x25 kV AC system has been chosen. Introduction of this new technology leads to differe...
متن کامل