Abstract

For high-frequency (HF) interference in an HVDC converter station, the modeling of the noise source which causes interference with the power line carrier (PLC) remains a problem. Based on the profound analysis of the basic principles on which HF noise in PLC band is produced during the commutation process, the equivalent model of the HVDC valve with a snubber circuit is applied to the simulation of the GUI-GUANG HVDC project in PSCAD/EMTDC. Then spectrum plots of the noise source in the frequency domain are obtained by FFT analysis of the voltage waveforms gained from the simulation. Through analyzing the spectrum characteristics of the noise source in various operating modes, the main factors influencing the level of HF noise are found. Furthermore, a modified empirical model used to calculate the level of the noise source is introduced, with particular explanation of the physical quantities used in the model. The spectra of the noise source gained from the modified empirical model and from the simulation are compared with an actual spectrum based on the GUI-GUANG HVDC project. The results show that the modified empirical model can meet the requirement of HF interference calculation.

Submitted: June 19, 2007 · Accepted: October 2, 2007 · Published: December 16, 2007

Recommended Citation

Hao, Quanrui and Xu, Zheng (2007) "Model of Noise Source for HF Interference Calculation in a Converter Station," International Journal of Emerging Electric Power Systems: Vol. 8 : Iss. 6, Article 3.
Available at: http://www.bepress.com/ijeeps/vol8/iss6/art3