scholarly journals An Improved Detection Algorithm of Three-phase Unbalanced Voltage Sag Detection Method for Improving Power Supply Reliability

2021 ◽  
Vol 1043 (4) ◽  
pp. 042007
Author(s):  
C Peng ◽  
S L Hu ◽  
X H Hao
Keyword(s):  
Power Supply ◽  
Detection Method ◽  
Detection Algorithm ◽  
Voltage Sag ◽  
Three Phase ◽  
Unbalanced Voltage ◽  
Voltage Sag Detection ◽  
Supply Reliability

Quantitative evaluation method of power supply reliability considering voltage sag

2021 ◽  
Vol 675 (1) ◽  
pp. 012121
Author(s):  
Pei Du ◽  
Yan Lin ◽  
Weijun Zhang ◽  
Zhixuan Liu ◽  
Fang Lin ◽  
...  
Keyword(s):  
Quantitative Evaluation ◽  
Power Supply ◽  
Evaluation Method ◽  
Voltage Sag ◽  
Supply Reliability

Experimental Analysis on the Operating Performance of Induction Motor with Unbalance Power Supply Conditions

2014 ◽  
Vol 635-637 ◽  
pp. 1404-1407
Author(s):  
Yuan Xing Zhang ◽  
Fei Li ◽  
Ya Li Shen ◽  
Lei Juan Yang ◽  
Jie Li ◽  
...  
Keyword(s):  
Induction Motor ◽  
Power Supply ◽  
Power Efficiency ◽  
Single Phase ◽  
Reactive Power ◽  
Phase Voltage ◽  
Three Phase ◽  
Unbalanced Voltage ◽  
Negative Sequence Current ◽  
Domestic Appliances

Problems of power quality have been increasingly concerned by the researchers, as the domestic appliances we are usually used are single-phase load, which mainly causes the unbalance of three-phase voltage of power supply. If the induction motor is supplied by three-phase unbalanced voltage, the currents, active and reactive power, efficiency, and losses are affected as the negative-sequence current appears, this paper is emphasized on the induction motor’s characteristics when its’ power supply is three-phase unbalanced voltage by experimental research.

A Voltage Sag Detection Method Based on Modified S transform With Digital Prolate Spheroidal Window

2020 ◽  
pp. 1-1
Author(s):  
Jianmin Li ◽  
Yuxiang Yang ◽  
Haijun Lin ◽  
Zhaosheng Teng ◽  
Fu Zhang ◽  
...  
Keyword(s):  
Detection Method ◽  
Voltage Sag ◽  
Prolate Spheroidal ◽  
S Transform ◽  
Voltage Sag Detection

Voltage Sag Detection Method Based on Wavelet Information

2015 ◽  
Vol 740 ◽  
pp. 470-473
Author(s):  
Da Hai Zhang ◽  
Cheng Yu Ge ◽  
Chen Chen ◽  
Xian He Han
Keyword(s):  
Wavelet Analysis ◽  
Power Quality ◽  
Detection Method ◽  
Voltage Sag ◽  
Major Power ◽  
Wavelet Method ◽  
Quality Problem ◽  
Local Maxima ◽  
Multi Scale ◽  
Voltage Sag Detection

Voltage sag is the major power quality problem and receives wide attention. Although wavelet analysis works well for detecting voltage sag features, the existence of noise can reduce the advantages of wavelet method or even make it ineffective. To solve the problem, the paper uses multi-scale wavelet information by multiplying the results of several scales, and then searches the local maxima from the product to find the transition moment of voltage sag. The proposed method can suppress the noise and improve the accuracy for detecting voltage sag features. Simulation result validates the effectiveness of the proposed method.

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