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Harmonic analysis of AC‐bus voltage in converter station based on time–frequency transformation
- Source :
- The Journal of Engineering (2018)
- Publication Year :
- 2019
- Publisher :
- Institution of Engineering and Technology (IET), 2019.
-
Abstract
- The disturbance of the AC system has become one of the main causes of commutation failure in the high voltage direct current (HVDC) transmission system. Here, the time–frequency transformation method is used to analyse the AC-bus voltage disturbance from the perspective of the harmonic content of the AC power network. The time–frequency transformation for AC-bus voltage disturbance is difficult due to its characteristics of time variability and time fixity. With comparative analysis of various transformation methods, the method of combining the wavelet packet transform with the short-time Fourier transform can meet the requirement of time–frequency analysis of the AC voltage disturbance very well, and this method was used to analyse the fault recording data of Fengjing Convert Station when commutation failure occurred in recent years. The result shows that the AC-bus voltage mainly contained third and fifth harmonics, and there was a certain amount of even harmonics, and the low-order harmonics would be more in the case of a remote fault. In addition, there were more harmonics in the voltage when faults occurred in the 500 kV system, while there were more low-order harmonics when faults occurred in the other voltage class systems.
- Subjects :
- fifth harmonics
AC-bus voltage disturbance
Computer science
time fixity
harmonic content
Energy Engineering and Power Technology
Topology
HVDC power convertors
voltage 500.0 kV
Harmonic analysis
Bus voltage
symbols.namesake
time–frequency analysis
Commutation
transformation methods
AC system
commutation failure
General Engineering
Short-time Fourier transform
power system faults
Wavelet transform
HVDC power transmission
fault diagnosis
time-frequency analysis
Fengjing Convert Station
Fourier transforms
voltage class systems
Time–frequency analysis
low-order harmonics
wavelet transforms
HVDC transmission system
Transformation (function)
Fourier transform
lcsh:TA1-2040
short-time Fourier transform
AC power network
harmonic analysis
symbols
AC voltage disturbance
time variability
time–frequency transformation method
commutation
lcsh:Engineering (General). Civil engineering (General)
Software
Subjects
Details
- ISSN :
- 20513305
- Volume :
- 2019
- Database :
- OpenAIRE
- Journal :
- The Journal of Engineering
- Accession number :
- edsair.doi.dedup.....281b9ebc4f92bf118a11624b563637e0