A high voltage multi level arbitrary waveform generator for insulation testing

Pang, Lei; Ye, Mingtian; Li, Geqi; Zhang, Qiaogen; He, Kun

doi:10.1109/tdei.2019.007730

Cited by 20 publications

(5 citation statements)

References 8 publications

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“…Сейчас для диагностики состояния изоляции кабельных линий используются испытательные установки со следующими выходными напряжениями: высоковольтным постоянным; высоковольтным промышленной частоты; сверхнизкой частоты с импульсами прямоугольной и синусоидальной формы [19,20]. Наиболее предпочтительным для испытаний кабелей с изоляцией из СПЭ является прикладывание напряжения сверхнизкой частоты (0,1 Гц) синусоидальной или прямоугольной формы, так как в этом случае эффективно диагностируются дефекты и минимизируется разрушающее воздействие на изоляцию.…”

Section: методы диагностики кабельных линий с изоляцией из спэunclassified

Development of a Tester for Diagnostics of Cable Lines State With Xlpe Insulation

Konev,

Khakimyanov

2023

IZVESTIYA

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Link for citation: Konev A.A., Khakimyanov M.I. Development of a tester for diagnostics of cable lines state with XLPE insulation. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 9, рр. 216-223. In Rus. Relevance. The moral and physical deterioration of cable lines voltage of 6–10 kV in our country ranges from 40 to 80 %. At the same time, up to 63 % of all accidents in electrical equipment are due to cable line failures. Recently, cables with cross-linked polyethylene insulation have been actively used, for the diagnosis of which special approaches are required. Therefore, the issues of developing high-voltage test facilities for diagnosing the state of insulation of electrical equipment are quite relevant. The authors proposed an original design of a high-voltage test facility that allows generating both direct voltage and alternating voltages of industrial and ultra-low frequencies. A feature of the device is the use of a multifunctional integrated electromagnetic component in it, which combines the functions of both an inductor and a capacitor. The use of this component allows reducing the dimensions and weight of the test facility. The main aims of the research are to develop a design of a high-voltage test facility and to study its characteristics; build a mathematical model and get dependency graphs. Objects: cables with XLPE insulation, high voltage test facilities. Methods: theory of electrical circuits, mathematical modeling, program for mathematical and engineering calculations Mathcad, MATLAB Simulink. Results. The authors proposed the original design of a high-voltage test facility, which makes it possible to generate both direct voltage and alternating voltages of industrial and ultra-low frequencies. The simulation of the installation was carried out. A method for calculating high-voltage test facilities is proposed.

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Section: методы диагностики кабельных линий с изоляцией из спэunclassified

Development of a Tester for Diagnostics of Cable Lines State With Xlpe Insulation

Konev,

Khakimyanov

2023

IZVESTIYA

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“…For example, mobile communication system requires that the DSP system should have faster data transmission rate and better stability [8] [9]. In the arbitrary waveform generator [10]- [12], the DSP system is required higher synchronization accuracy.…”

Section: Introductionmentioning

confidence: 99%

Optimal design of digital FIR filters based on back propagation neural network

Yang

et al. 2023

IEICE Electron. Express

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In the traditional digital finite impulse response (FIR) filter design, there exist some limitations. For instance, unwanted signals cannot be filtered out by using these FIR filters. Therefore, to break these limitations, this paper proposes an optimization method for designing digital FIR filters based on the back propagation neural network (BPNN) algorithm. Firstly, an amplitude response model has been established based on the linear properties of the digital FIR filters. Then, the BPNN algorithm has been used to minimize the estimation error between the ideal and the actual amplitude response such that the optimal coefficients of the digital FIR filter can be obtained. Finally, several design examples are used to verify the performance of our proposed optimal design based on BPNN. The simulation results show that, compared with the optimal designs based on the sequential and rectangular window, our proposed optimal design based on BPNN can achieve better filtering effectiveness but at the cost of larger computational complexity.

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“…Under these circumstances above, power electronics based technologies such as modular multilevel converter (MMC) and pulse width modulated inverters are gradually accepted in power applications [2]. However, the switching operation of power electronic devices introduce new electrical stresses to power equipment, such as multilevel staircase waveform voltage [3]. The appearance of the multilevel staircase waveform voltage will pose a new challenge to the insulation state evaluation, which are typically assessed through the analysis of partial discharge (PD) [4].…”

Section: Introductionmentioning

confidence: 99%