A novel method for single phase-to-ground fault location based on wavelet analysis and correlation

Bi, Taihang; Shen, Rongrong; Plans, Josep; Zhao, Huashi

doi:10.1109/isgt.2013.6497876

Cited by 6 publications

(2 citation statements)

References 9 publications

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“…In the power system, line voltage, as a basic data point, plays a very important role in numerous engineering projects and theoretical research [1][2][3][4]. Voltage measurement, as an important component of the power system, plays a decisive role in applications such as relay protection [5], energy metering, intelligent equipment control [6,7], and the online monitoring of overvoltage [8][9][10][11]. The accuracy, reliability, convenience, and speed of voltage measurement are key technical requirements in energy metering and relay protection, power system monitoring and diagnosis, and power system fault analysis, and they are the foundation for ensuring the safe operation of the power system.…”

Section: Introductionmentioning

confidence: 99%

Non-Contact Adaptive Voltage Sensor Based on Electric Field Coupling Principle

Tan,

Zhang,

et al. 2023

Sensors

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Non-contact voltage sensors based on the principle of electric field coupling have the advantages of simple loading and unloading, high construction safety, and the fact that they are not affected by line insulation. They can accurately measure line voltage without the need to connect to the measured object. Starting from the principle of non-contact voltage measurement, this article abstracts a non-contact voltage measurement model into the principle of capacitive voltage sharing and deduces its transfer relationship. Secondly, it is theoretically inferred that the edge effect of the traditional symmetric structure sensor plate will cause the actual capacitance value between the sensor plates to be greater than the theoretically calculated capacitance value, resulting in a certain measurement error. Therefore, the addition of an equipotential ring structure is proposed to eliminate the edge additional capacitance caused by the edge effect in order to design the sensor structure. In addition, due to the influence of sensor volume, material dielectric constant, and other factors, the capacitance value of the sensor itself is only at pF level, resulting in poor low-frequency performance and imbuing the sensor with a low voltage division ratio. In this regard, this article analyzes the measurement principle of non-contact voltage sensors. By paralleling ceramic capacitors between the two electrode plates of the sensor, the capacitance of the sensor itself is effectively increased, improving the low-frequency performance of the sensor while also increasing the sensor’s voltage division ratio. In addition, by introducing a single pole double throw switch to switch parallel capacitors with different capacitance values, the sensor can have different voltage division ratios in different measurement scenarios, giving it a certain degree of adaptability. The final sensor prototype was made, and a high and low voltage experimental platform was built to test the sensor performance. The experimental results showed that the sensor has good linearity and high measurement accuracy, with a ratio error of within ±3%.

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Section: Introductionmentioning

confidence: 99%

Non-Contact Adaptive Voltage Sensor Based on Electric Field Coupling Principle

Tan,

Zhang,

et al. 2023

Sensors

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“…These methods can generally be classified as (i) methods based on fundamental harmonic of current and voltage signals [1][2]7], (ii) methods using transmission line differential equations and line parameters estimation [3], (iii) those based on travelling waves measurements [4][5][6][7]18]. The accuracy of first and second group is not so good, because the calculation algorithm depends on line parameters and load conditions, while lines parameters are affected by many factors such as weather condition, fault type, fault impedance and so on [8].…”

Section: Introductionmentioning

confidence: 99%

Fault location in transmission lines using neural network and wavelet transform

Raoofat

Mahmoodian

Abunasri

2015

2015 International Congress on Electric Industry Automation (ICEIA 2015)

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This paper presents a new method of fault location in transmission lines. The method is based on analysis of reflected traveling waves from fault point. Regarding weak frequency response of conventional output of capacitive voltage transformers (CVT), the proposed method receives the travelling waves from PLC output of CVTs, which has a good frequency response for high frequency travelling waves. Received signal is processed by wavelet transform, and signal characteristics are used as input for neural network. After training a neural network, the algorithm estimates the location of fault with reasonable accuracy. The algorithm is independent of the network configuration or length of the line, and is trained once for each voltage level. Numerical studies show the efficacy and accuracy of the algorithm for different configurations.

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A single-phase-to-ground fault location method based on convolutional deep belief network

Chu

Shao

et al. 2022

Electric Power Systems Research

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A novel method for single phase-to-ground fault location based on wavelet analysis and correlation

Cited by 6 publications

References 9 publications

Non-Contact Adaptive Voltage Sensor Based on Electric Field Coupling Principle

Non-Contact Adaptive Voltage Sensor Based on Electric Field Coupling Principle

Fault location in transmission lines using neural network and wavelet transform

A single-phase-to-ground fault location method based on convolutional deep belief network

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