Automated replacement scheme of DC transformer bushing based on laser scanning profile: Design and experiment

Du, Xiaopeng; Ai-ping, Xiao; Yue, Hongqiang

doi:10.1016/j.epsr.2020.106967

Cited by 3 publications

(5 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(3) A system for measuring casing performance is designed, including its system design and scheme. (3) The experiment realizes the reliability test of aramid casing and comes to the conclusion that its reliability is generally greater than 1, with high reliability. (4) The experiment realizes the steady-state distribution of radial and axial temperature field of bushing under different currents.…”

Section: Discussionmentioning

confidence: 99%

“…The initial value of the cylinder fitting algorithm based on the two-dimensional laser profile is also proposed to solve the position of the casing. The algorithm fully considers the characteristics of the laser profile scanner and uses the circle and straight line fitting algorithm to solve the initial value [3]. Srivastava designed a wear test device to measure the sliding temperature and wear amount of aluminum copper metal matrix composite bearing bush in rotating steel shaft.…”

Section: Significancementioning

confidence: 99%

See 1 more Smart Citation

Electrical Performance Safety Detection of Aramid Casing Based on Molecular Dynamics and Deep Learning Algorithm

Liu

Fan

et al. 2022

Journal of Nanomaterials

View full text Add to dashboard Cite

Transformer bushing is one of the key equipment of transmission system, and its performance directly affects the stability and safety of transmission system. This paper is aimed at studying the safety detection of electrical properties of aramid shells with molecular dynamics and deep learning algorithms. The bushing needs to withstand AC voltage, DC voltage, and polarity reversal voltage during operation. The complexity of operating conditions leads to the improvement of bushing requirements for insulation performance, and bushing accident is a common type of transformer accident, accounting for 30% of the total number of transformer accidents. Therefore, it is necessary to detect the electrical performance and safety of the bushing to ensure the safe and stable operation of the power system. Aramid casing is a kind of casing with many advantages, such as high strength, high tensile breaking force, high stability, and high temperature resistance. Molecular dynamics is helpful to deeply analyze the micro mechanism of various complex phenomena, so as to explain the relationship between material microstructure and macroproperties, so it is very helpful to analyze the structure and properties of aramid casing. Deep learning is an important research direction in the field of machine learning. It can extract important features and simplify casing analysis steps. In this paper, an electrical performance test system of aramid casing is designed. It is proved that the reliability of casing is generally greater than 1 and the reliability is high. The current performance of the bushing is tested. 400 A is a dividing point, and no matter how large the current is, the maximum temperature is no more than 130°, which proves that the current performance of the bushing is stable and the temperature resistance is good. Finally, the radial field strength distribution of bushing capacitor core under different initial moisture content is tested, and it is concluded that the moisture can not be greater than 6%.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Significancementioning

confidence: 99%

Electrical Performance Safety Detection of Aramid Casing Based on Molecular Dynamics and Deep Learning Algorithm

Liu

Fan

et al. 2022

Journal of Nanomaterials

View full text Add to dashboard Cite

show abstract

“…where K(m, n, l) is the direction vector of space straight line and L(x 0 , y 0 , z 0 ) is the point on the space straight line. e cylindrical bushing fitting algorithm has been introduced in detail and verified in reference [11]. e offset angle between the simulated axis and the actual axis is represented by B(θ).…”

Section: Repeated Positioning Accuracy Error Modelmentioning

confidence: 99%

“…e disassembly process is opposite to the installation process. e whole process is complicated and time consuming [8][9][10][11]. As shown in Figure 1 below is the field diagram of the removal of the bushing on the side of the UHV converter valve in a converter station.…”

Section: Introductionmentioning

confidence: 99%

Parameter Calibration on Replacement Manipulator for UHV Valve-Side Bushing Based on Spinor Theory

Zhang

Ai-ping

et al. 2021

Mathematical Problems in Engineering

Self Cite

View full text Add to dashboard Cite

In this paper, a structure design scheme of intelligent replacement device for the ultrahigh voltage (UHV) converter transformer valve-side bushing is put forward, and its size is determined according to the actual size of domestic converter station valve hall and UHV converter transformer valve-side bushing. Moreover, the weak links in its working state are analyzed by finite element method to ensure the safety and reliability of the structure. Based on the spinor theory, the forward kinematics and Jacobian matrix model of the manipulator are established, and the analytical solution of inverse kinematics is derived. In order to analyze the accuracy of the intelligent replacement manipulator for the UHV converter transformer valve-side bushing, considering that the end actuator of the robot arm is under heavy load, the absolute positioning accuracy and repeated positioning accuracy are analyzed. In addition, the corresponding error model is established, the least square method is proposed to identify the error model, and the influence of the error caused by the load on the repetition accuracy is analyzed. Finally, the whole process simulation in ROS provides data support for the calculation of repetitive precision and verifies the feasibility of the intelligent replacement device for the UHV converter valve-side bushing.

show abstract

“…Power grid accidents caused by bushing failures are common [5][6][7][8][9][10], and chain accidents caused by ultra-high voltage bushing failures are becoming more and more serious, even causing fire, explosion, and serious harm to people and equipment [11,12]. Therefore, with the help of advanced sensing and signal processing technology, it is urgent to carry out digital intelligent online monitoring of transformer bushing status [13][14][15][16][17][18]. The insulation structure of bushing is very compact, which is different from the traditional oil-filled equipment.…”

Section: Introductionmentioning

confidence: 99%

Intelligent monitoring of EHV transformer bushing based on multi‐parameter composite sensing technology

Zhang,

Sun,

Wang

et al. 2023

IET Science Measure & Tech

View full text Add to dashboard Cite

In order to monitor the state of bushing online, an intelligent monitoring system for transformer bushing was developed. A four‐in‐one sensor integrating hydrogen sensing technology using palladium nickel alloy, pressure sensing technology, wide range temperature sensing, and micro water measurement technology was developed. A three‐in‐one integrated sensor based on micro current detection technology was developed to realize online monitoring of bushing dielectric loss, capacitance, and partial discharge. The test results show the hydrogen measurement range of sensor is 0 to 10,000 μL/L, and the measurement uncertainty is lower than 10% or 10 μL/L. The pressure measurement range is 0 to 1.0 MPa, and the uncertainty is lower than 0.3%. The temperature measurement range is −40°C to 85°C, and the uncertainty is lower than ± 1°C. The micro water measurement range is 0 to 1000 μL/L, and the measurement uncertainty is lower than ± 5% or 10 μL/L. The dielectric loss and capacitance error increased by one order of magnitude compared to current standards. The resolution of partial discharge is 5 pC. The performance of the device fully satisfies the requirements for online monitoring of transformer bushing. It has been installed in dozens of 330 and 750 kV substations, providing a reliable guarantee for safe operation of transformer bushing.

show abstract

Automated replacement scheme of DC transformer bushing based on laser scanning profile: Design and experiment

Cited by 3 publications

References 26 publications

Electrical Performance Safety Detection of Aramid Casing Based on Molecular Dynamics and Deep Learning Algorithm

Electrical Performance Safety Detection of Aramid Casing Based on Molecular Dynamics and Deep Learning Algorithm

Parameter Calibration on Replacement Manipulator for UHV Valve-Side Bushing Based on Spinor Theory

Intelligent monitoring of EHV transformer bushing based on multi‐parameter composite sensing technology

Contact Info

Product

Resources

About