Abstract
This paper deals with device for online, real time analysis of recuperative current with use of microprocessor. This system is used in railway transport for measurement and analysis of recuperative-currents from converter in railway engine. Recuperative currents from converters in railway engines, flows through rail back to the distribution point. Content of higher harmonics in these currents must not exceed limits specified in international standard UIC 550-3, so exact measurement and analysis of this harmonics is necessary. Proposed device uses microprocessor for real time measurement and analysis of recuperative currents. DOI: http://dx.doi.org/10.5755/j01.eee.19.5.4364
Highlights
Power semiconductor systems are nowadays utilized in most of consumer and industrial applications including transportation
On the other side, every solution has several disadvantages. For this case we are going to speak about nonlinear load of distribution network. This nonlinearity is given by the fact that converters are consisting from switching elements semiconductor devices, which are operating in high frequency mode
Can be seen that last testing square wave signal consists higher harmonics whose frequencies are odd multiples of basic frequency and for this type the number of higher harmonics is the biggest compared to previous ones. Based on these trivial measurements we found out proper operation of proposed system suited for real time analysis of current's spectrum
Summary
Power semiconductor systems are nowadays utilized in most of consumer and industrial applications including transportation. For this case we are going to speak about nonlinear load of distribution network This nonlinearity is given by the fact that converters are consisting from switching elements semiconductor devices, which are operating in high frequency mode. The sensing device will be constructed through utilization of modern microprocessor unit (TMS320F28335 from Texas Instruments), and will be representing full digital system for real time analysis of current spectrum of power semiconductor converter. Our proposal of system for real time analysis of current's spectrum is primarily indented for use in railway applications. This system can be normally used in every application where exact measurement of recuperative current is necessity. For the purpose of the voltage level adjustment on the measuring resistor without loss of information of measured signal the utilization of circuit (Fig. 3.) was necessary
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