Title :
Dual synchronization incremental method for harmonic impedance measurement
Author :
Shusen Li ; Yao Xiao ; Junzhao Cheng
Author_Institution :
High Voltage Res. Inst., China Electr. Power Res. Inst., Wuhan, China
Abstract :
Harmonic impedance is a key parameter for filter design and assessment of harmonic emission level. Till present, there is no simple and convenient measurement method and instrument for determining harmonic impedance. Due to lack of basic system parameters, error in harmonic impedance calculation is great. This paper investigates a harmonic impedance measurement method named increments in harmonic voltage and current. Major errors source from power frequency shift and phase angle synchronization for signals at different sampling windows is analyzed and error evaluation method is provided, On which, “dual synchronization” method and its implementation is proposed. The effectiveness of the proposed method is confirmed by experiment. The proposed method provided a simple and convenient approach for harmonic impedance measurement.
Keywords :
electric impedance measurement; power filters; dual synchronization incremental method; error evaluation method; filter design; harmonic current; harmonic emission level; harmonic impedance measurement method; harmonic voltage; phase angle synchronization; power frequency shift; sampling windows; Current measurement; Harmonic analysis; Power system harmonics; Switches; Voltage measurement; Frequency measurement; Harmonic analysis; Impedance Measurement; Phase detection; Phase measurement; Phase synchronization; Power system harmonics; Test equipment Introduction;
Conference_Titel :
Harmonics and Quality of Power (ICHQP), 2012 IEEE 15th International Conference on
Conference_Location :
Hong Kong
Print_ISBN :
978-1-4673-1944-7
DOI :
10.1109/ICHQP.2012.6381308