Low Frequency Conducted Emissions of Grid Connected Static Converters

Pulse-width modulated rectifiers are nowadays commonly used for AC to DC power conversion. PWM rectification technology is very effective and allows for bidirectional power flow with the possibility of power factor improvement and low-order harmonic emission limitation. Unfortunately, employed PWM boost topology results with generation of input current harmonic distortions in a frequency range tightly correlated to modulation frequency. PWM carrier frequency and its harmonic components in typical applications are usually located in frequency range from single kHz up to hundreds of kHz. Increase of harmonic emission in this particular frequency range can be disturbing for other sensitive systems, therefore can cause lack of electromagnetic compatibility. Interferences in low frequency range are increasingly frequent EMC issue because of extensive use of low power PWM rectifiers and significant increase of rated power of individual converters, which already reach several MW. Presented comparison of current harmonic emission spectra of PWM rectifiers with relation to classic diode rectifiers is focused on frequency range of 2 to 9 kHz, for which emission limitation rules are currently under development. New class of EMC problems arising in low frequency range in power system are underlined as a result of increased harmonic emission in frequency range of 2 to 9 kHz.

[1]  P.F. Ribeiro,et al.  Limits for Voltage Distortion in the Frequency Range 2 to 9 kHz , 2008, IEEE Transactions on Power Delivery.

[2]  Hirofumi Akagi.  Control Strategy and Site Selection of a Shunt Active Filter for Damping of Harmonic Propagation in Power Distribution Systems , 1997 .

[3]  R. Smolenski,et al.  Voltage harmonic distortion measurement issue in smart-grid distribution system , 2012, 2012 Asia-Pacific Symposium on Electromagnetic Compatibility.

[4]  Math Bollen,et al.  Harmonics — Another aspect of the interaction between wind-power installations and the grid , 2013 .

[5]  Math H. J. Bollen,et al.  Solar power in northern Scandinavia, its impact on the grid and methods to mitigate this impact , 2013, IEEE PES ISGT Europe 2013.

[6]  Robert Smolenski,et al.  Selected conducted electromagnetic interference issues in distributed power systems , 2009 .

[7]  Frank Leferink,et al.  DC pollution of AC mains due to modern compact fluorescent light lamps and LED lamps , 2013, 2013 International Symposium on Electromagnetic Compatibility.

[8]  J. Meyer,et al.  Assessment of emission limits for disturbing installations connected to HV distribution networks in AT, CH, CZ and GE , 2012, 2012 IEEE 15th International Conference on Harmonics and Quality of Power.

[9]  Math Bollen,et al.  Street lamps aggregation analysis through IEC 61000-3-6 approach , 2013 .

[10]  M. Liserre,et al.  An overview of three-phase voltage source active rectifiers interfacing the utility , 2003, 2003 IEEE Bologna Power Tech Conference Proceedings,.

[11]  Robert Smolenski.  Conducted Electromagnetic Interference (Emi) in Smart Grids , 2012 .

[12]  Jaroslaw Luszcz.  High frequency harmonics emission of modern power electronic AC-DC converters , 2013, 2013 International Conference-Workshop Compatibility And Power Electronics.

[13]  Grzegorz Benysek,et al.  AC/DC/DC Interfaces for V2G Applications—EMC Issues , 2013, IEEE Transactions on Industrial Electronics.

[14]  Marian P. Kazmierkowski,et al.  Active filtering function of three-phase PWM boost rectifier under different line voltage conditions , 2005, IEEE Transactions on Industrial Electronics.

[15]  Math Bollen,et al.  Propagation of harmonic emission from the turbines through the collection grid to the public grid , 2012 .

[16]  Jarosław Łuszcz.  Voltage Harmonics Measuring Issues in Medium Voltage Systems , 2011 .

[17]  Mariusz Malinowski,et al.  Direct power control for three-phase PWM rectifier with active filtering function , 2003 .

[18]  Math Bollen,et al.  Integration of Distributed Generation in the Power System , 2008 .

[19]  R. Zurowski,et al.  Measures for the limitation of voltage distortion in the kHz range , 2005, 2005 International Power Engineering Conference.