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Title: Some novel techniques for improving power quality in distribution networks
Authors: Zeng, XJ
Li, KK
Chan, WL 
Yin, X
Keywords: Earthing
Fault location
Power distribution control
Power distribution faults
Power distribution protection
Power supply quality
Voltage control
Issue Date: 2004
Publisher: IEEE
Source: Proceedings of the 2004 IEEE International Conference on Electric Utility Deregulation, Restructuring and Power Technologies, 2004 : (DRPT 2004), 5-8 April 2004, v. 1, p. 306-310 How to cite?
Abstract: Power quality is influenced by neutral grounding methods in distribution systems. Optimization for neutral grounding methods is discussed in the paper. Petersen-coil in parallel with high resistance earthed technique has a better performance in safety and power quality than other neutral point grounding techniques. To improve power quality, a novel method for measurement of zero sequence impedance in distribution systems is presented, Petersen-coil inductance is adjusted to compensate the total capacitance, and the resistor which is in parallel with the Petersen-coil is adjusted to control the over-voltage; some other novel techniques for grounding fault feeder protection based on testing the fault resistance or the energy dissipated in the fault point are also presented. The method of Petersen-coil tuning has been developed. Experimental results show that the optimization for neutral grounding methods and the protections proposed can improve the power quality by reducing the over-voltage, the residual current and the grounding fault duration.
ISBN: 0-7803-8237-4
DOI: 10.1109/DRPT.2004.1338512
Appears in Collections:Conference Paper

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