High Precision Detection for Power System Parameters Based on Wavelet Transform under Asynchronous Sampling

2010 ◽  
Author(s):  
Ying Zhang-Feng ◽  
Wu Jun-ji
Keyword(s):  
Wavelet Transform ◽  
Power System ◽  
High Precision ◽  
System Parameters ◽  
Asynchronous Sampling

scholarly journals Analysis of power system parameters for islanding detection using wavelet transform

2020 ◽  
Vol 17 (3) ◽  
pp. 1184
Author(s):  
Safdar Raza ◽  
Hanya Amjad ◽  
Muhammad Umer ◽  
Aqeel Khalid
Keyword(s):  
Wavelet Transform ◽  
Power System ◽  
Reactive Power ◽  
Islanding Detection ◽  
Mother Wavelet ◽  
Basic Step ◽  
System Parameters ◽  
Suitable Parameter ◽  
And Performance ◽  
Basic Power

<p><span>This paper classifies the basic power system parameters based on sensitivity and performance capability. This is the basic step in selecting the suitable parameter for intelligent islanding detection technique. The behaviour of basic power system parameters is analyzed using wavelet transform under all possible islanding and non-islanding conditions. In wavelet transform, the mother wavelet plays a significant role in the extraction of parameter features. The db4 mother wavelet is selected after an extensive analysis on different mother wavelets. As a result, it has been found that the extracted feature of reactive power shows the highest capability to distinguish islanding from non-islanding events.</span></p>

scholarly journals Impact of the Generation System Parameters on the Frequency Response of the Power System: A UK Grid Case Study

Electricity ◽  
2021 ◽  
Vol 2 (2) ◽  
pp. 143-157
Author(s):  
Jovi Atkinson ◽  
Ibrahim M. Albayati
Keyword(s):  
Power System ◽  
Frequency Response ◽  
Power Grid ◽  
Sudden Increase ◽  
Generation System ◽  
System Parameters ◽  
Primary Frequency ◽  
Primary Frequency Response ◽  
The Impact ◽  
System Inertia

The operation and the development of power system networks introduce new types of stability problems. The effect of the power generation and consumption on the frequency of the power system can be described as a demand/generation imbalance resulting from a sudden increase/decrease in the demand and/or generation. This paper investigates the impact of a loss of generation on the transient behaviour of the power grid frequency. A simplified power system model is proposed to examine the impact of change of the main generation system parameters (system inertia, governor droop setting, load damping constant, and the high-pressure steam turbine power fraction), on the primary frequency response in responding to the disturbance of a 1.32 GW generation loss on the UK power grid. Various rates of primary frequency responses are simulated via adjusting system parameters of the synchronous generators to enable the controlled generators providing a fast-reliable primary frequency response within 10 s after a loss of generation. It is concluded that a generation system inertia and a governor droop setting are the most dominant parameters that effect the system frequency response after a loss of generation. Therefore, for different levels of generation loss, the recovery rate will be dependent on the changes of the governor droop setting values. The proposed model offers a fundamental basis for a further investigation to be carried on how a power system will react during a secondary frequency response.

Distance Protection Application Based on Wavelet Transform and Traveling Wave Ranging

2012 ◽  
Vol 150 ◽  
pp. 40-44
Author(s):  
Peng Peng Kang ◽  
Xi Fang Zhu
Keyword(s):  
Wavelet Transform ◽  
Power System ◽  
Transmission Line ◽  
Software Design ◽  
Traveling Wave ◽  
Wave Theory ◽  
Distance Measurement ◽  
Distance Protection

This paper describes the wavelet transform theory, and traveling wave theory. When the power system transmission line fault occurs, the fault signal generated by sampling and analysis, and use a method of one-end fault distance measurement in transmission line. Finally the article gives the ranging devices’ hardware and software design.

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