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ELECTRIC traction is considered one of the most widely used means of transportation because of its advantages such as being economical, environment friendly etc. Indian Railways has been using electric traction fed by 25kV single-phase AC supply obtained from three phase utility. This paper analyses the harmonic issues of the electric traction system by measuring voltage, current and harmonics at...
The paper studies the problems on centralized normalization of harmonic voltages in the network with distributed nonlinear loads by the passive filters. The nonlinear loads are connected to the extended HV network at practically equal distances. Each nonlinear load is of sufficiently high power. The harmonic voltage values at the nodes of nonlinear loads connection to the supply network exceed the...
The paper presents some of the active filters topologies used for the improving of power quality. One presents some recordings and numerical simulations made over the electric signals from a substation used for the supplying of a d.c. line of 600 V. Based on the obtained results one proposes solutions for active compensations with the consideration of a number of filtering components. In order to...
Based on the data of Jinxi Electric Substation of Lishui Power System (including its power net topology, parameters, harmonic sources and the field testing harmonic data in period of 16/06/2004 19:56:00-17/06/2004 09:15:00), the combined approaches of harmonic filtering are analyzed.
An universal active power filter controller system is proposed that adapts itself to both harmonic current source type loads as well as harmonic voltage source type loads is presented in this paper. The system level harmonic filtering application issues of a multiple and clustered harmonic producing load site, such as at an industrial load site or at a distribution substation, are addressed. Harmonic...
The paper shows the present results of a long term research work. The authors are working on the modeling of penetration and elimination of harmonic disturbance originating from the high power railways. This paper presents the application of the so called double domain simulation method, which is a combination of frequency and time dependent model. This novel method is used to improve the accuracy...
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