Flashover and partial discharge characteristics of fiber of valve tower in converter station

Xiong, Qing; Zhu, Lingyu; Ji, Shengchang; Cui, Yanjie; Lü, Weifeng

doi:10.1109/tdei.2016.006269

Cited by 6 publications

(4 citation statements)

References 16 publications

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“…where D M (A y ) is a diagonal matrix formed according to the M rows of the matrix; A x and A y represent both Vandermonde matrices, and the specific expressions are shown in Equations ( 3) and (4).…”

Section: Principle and Steps Of Music Algorithmmentioning

confidence: 99%

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Fast direction of arrival estimation method for ultra‐high voltage converter valve insulation board partial discharge based on a sparse array

Liu

Lai

et al. 2021

IET Science Measure & Tech

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An insulation board is an important insulator used between damping capacitors in a converter valve. The potential creeping discharge phenomenon on the insulation board will affect the insulation between the damping capacitors and even the safe operation of the converter valve; therefore, a modified chaos particle swarm optimization multiple signal classification (MCSPO‐MUSIC) localization algorithm based on a sparse array was proposed. The performance of the localization algorithm and the sparse array was analyzed by MATLAB simulation, and a test platform was established to detect the insulation board discharge position localization. The simulation results showed that the calculation time of this algorithm is about 1.5 s, which is an order of magnitude less than traditional MUSIC algorithm, and it is found that when the sparsity of the 4 × 4 array is 4 (the sparse array elements are 5, 9, 14 and 15), the localization accuracy remains high. Ten groups of experimental data were put into the MCSPO‐MUSIC algorithm; the root mean square errors (RMSE) of the localization errors are 1.91° (non‐sparse array) and 3.12° (sparse array), respectively. Finally, the blind source separation algorithm was used to remove the field noise, which verifies the algorithm and sparse concept accurate and economical in practical application.

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Section: Principle and Steps Of Music Algorithmmentioning

confidence: 99%

“…In wet weather, creeping discharge phenomenon may occur. In serious cases, creeping flashover may occur, which may lead to thyristor damage or even the shutdown of the converter valve [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Fast direction of arrival estimation method for ultra‐high voltage converter valve insulation board partial discharge based on a sparse array

Liu

Lai

et al. 2021

IET Science Measure & Tech

View full text Add to dashboard Cite

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“…Examples of partial discharge are internal discharge, surface discharge and coronal discharge [5]. Partial discharge can trigger the risk of flashover [4], [8], [9]. Since corona discharge causes corrosion of the conductors, the resulting effects are failure of electronic components and disconnection of the electrical connections which affect the performance and reliable operation [10]- [13].…”

Section: Introductionmentioning

confidence: 99%

Temperature and Humidity Control System for Pole-Mounted Metering Circuit Breaker with Artificial Neural Network Methods

Ahmad,

Efendi,

Eviningsih

2023

ELKHA

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Pole-mounted Metering Circuit Breaker (PMCB) is a medium voltage protection device. Problems in the PMCB because operating at medium voltage causes insulation problems. The isolation problem that arises is due to partial discharge. Partial discharge can trigger the risk of flashover. In addition, corona discharge causes corrosion of the conductor, the effect is a failure and disconnection of electricity. This control system aims to maintain the temperature and humidity of the PMCB at the nominal values according to the standard. Based on SPLN D3.021-1:2020, it is known that under normal service conditions, the ambient air temperature does not exceed 40°C and the average temperature for 24 hours does not exceed 35°C and the highest relative humidity is 100% RH. The control system uses an AC voltage controller which is used to control the input voltage of the heater and exhaust fan so that the temperature and humidity can reach nominal operating conditions. The control method used is an artificial neural network (ANN) to find the ignition angle of the AC voltage controller as a TRIAC control. The test results using the ANN control method, system simulation produces a temperature error of 1.029% and humidity error of 2.48% and the hardware system produces a temperature error of 2.364% and humidity error of 8.673% compared to the set point temperature of 35°C and humidity of 50% RH. It can be concluded that the ANN control method can maintain the PMCB temperature and humidity according to standards

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“…For an insulating material of an electric power device exposed in an external environment, deterioration occurs where the chemical and mechanical properties of the material change because of environmental factors, thereby deteriorating the insulating property. Note that it is extremely important to understand the reliability of the insulating material because the deteriorated insulating material loses insulating properties and the leakage current flows and eventually breaks the insulation, which can lead to serious accidents [8].…”

Section: Introductionmentioning

confidence: 99%

Volume and Surface Resistivity Measurement of Insulating Materials Using Guard-Ring Terminal Electrodes

Lee

Kim

2020

Energies

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Recently, eco-friendly energy conversion policies have been being promoted through de-nuclearization and de-coal. For this purpose, a super grid should be built to optimize sustainable renewable energy resources such as solar and wind power. Accordingly, considering the various problems such as technology and cost, a system for efficient energy transmission is required. Hence, research is being actively conducted to apply it, owing to the development of the high voltage direct current (HVDC) system. Among HVDC systems, the cable system is extremely important, in addition to the measurement of the dielectric breakdown strength, space charge, and volume resistivity of insulating materials. The existing resistivity measurement method measures both the volume and surface resistivity using a three-terminal electrode that is used in the international standards of American Society for Testing and Materials (ASTM) D 257 and International Electrotechnical Commission (IEC) 60093. However, the circuit configuration differs depending on the measurement of the volume and surface resistivity; moreover, when a DC voltage is applied to the insulator, a charging current flows and there are multiple samples to be measured, which takes a considerable amount of time. Therefore, in this study, we proposed a new type of resistivity measurement system that is based on the existing three-terminal electrode system. Furthermore, we produced a system capable of simultaneously measuring the volume and surface resistivity. Finally, using this system, we compared and analyzed the volume and surface resistivity of five insulating materials.

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Flashover and partial discharge characteristics of fiber of valve tower in converter station

Cited by 6 publications

References 16 publications

Fast direction of arrival estimation method for ultra‐high voltage converter valve insulation board partial discharge based on a sparse array

Fast direction of arrival estimation method for ultra‐high voltage converter valve insulation board partial discharge based on a sparse array

Temperature and Humidity Control System for Pole-Mounted Metering Circuit Breaker with Artificial Neural Network Methods

Volume and Surface Resistivity Measurement of Insulating Materials Using Guard-Ring Terminal Electrodes

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