《International Journal of Electrical Power & Energy Systems》
A Novel Fault-Location Method for HVDC Transmission Lines Based on Similarity Measure of Voltage Signals
作者:
G Song，X Chu，X Cai，S Gao，M Ran
关键词:
voltage source converter HVDC(VSC-HVDC)；HVDC transmission line；fault location；natural frequency
摘要:
The natural frequency signal of voltage source converter HVDC(VSC-HVDC) transmission lines is more obvious than that of AC lines in transient process.As the impact of the shunt capacitor on both sides of the DC lines in VSC-HVDC,the system impedance can be equivalent to capacitor impedance in the natural frequency,and its value is very small.The traveling wave is total reflection in the system side.Consequently,the natural frequency of the VSC-HVDC transmission lines is only related to fault distance and wave speed.Accordingly,a single-end fault location method was proposed through the spectral analysis of current using Prony algorithm to obtain its natural frequency.Simulation results show that accurate fault location of HVDC transmission lines can be achieved with the proposed method.
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