Optimal design and analysis of anti-resonance C-type high-pass filters

The passive filters are widely used in the harmonic control of traction power supply system. However, high-speed trains have many types and frequent working conditions, which result in random dynamic characteristics of the harmonic spectrum of the trains. Moreover, the rapid change in harmonic injection position leads to changes in the harmonic transmission characteristics of the system. So it is difficult for passive filters to fully compensate the harmonics. Meanwhile, the existing method adopts an approximate tuning-frequency calculation formula, which makes it difficult to accurately control its filtering performance. First of all, by deriving an accurate tuning-frequency expression, this study reveals the influence of component parameters on the tuning-frequency and the possibility of tuning-frequency disappearance. Subsequently, based on the impedance-frequency index, which can describe the overall distribution of harmonics, the improved firefly algorithm is used to obtain a robust optimization design of the parameters of the C-type filter. The calculation example analysis shows that the proposed scheme has strong adaptability to harmonic random dynamic characteristics and a better filtering effect than the existing design methods, which is more suitable for a traction power supply system with strong harmonic random dynamic characteristics.INDEX TERMS Traction power supply system, harmonics, c-type filter, robust design.

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“…By setting the derivative of G F in terms of R equal to zero, the extreme values R P of G F can be obtained like (10).…”

Section: An Extant Design Scheme Of C-type Filtermentioning

confidence: 99%

“…Except TPSS, the C-type filter is also used to the harmonic control of arc furnace [7], high voltage direct current transmission system [8] and adjustable speed system [9]. What's more, the anti-resonance C-type filter is proposed in [10], [11].…”

Section: Introductionmentioning

confidence: 99%

Robust Design Scheme of C-Type Filter Considering Harmonic Dynamic Characteristics of Traction Power Supply System

2022

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“…. В качестве такого звена в [4,6,7,9,10] использован двухполюсник, образованный параллельным соединением резистора и последовательного резонансного контура, настроенного на частоту основной гармоники (на рис. 1, а демпфирующий двухполюсник выделен пунктиром).…”

Section: Introductionunclassified

Shunt power factor correction devices for damping of harmonic resonance in industrial power systems

Dovgun

Egorov

Novikov

et al. 2022

«Izvestiya vysshikh uchebnykh zavedenii. PROBLEMY ENERGETIKI»

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THE PURPOSE. Harmonic resonance has become a serious problem of shunt capacitor banks for reactive power and voltage support. Effective solution to damp out the capacitor-caused resonance is the series connection of capacitor bank with harmonic damping network. This paper presents a general design method for shunt capacitive compensating units with damping networks. The damping unit is designed in such a way that it provides harmonic filtering and adequate damping of the transient oscillations. METHODS. The method was developed for designing damping network in the form of ladder LC-two-port. The design is based on minimization of voltage total harmonic distortion (VTHD) in the point of common coupling. Normalized element parameters of the different order damping networks have been determined. RESULTS. Comparative study of transient behavior of shunt capacitive compensating units with damping networks illustrate the effectiveness of the propose structure. It has been observed that there is a significant reduction of transient overvoltage in switching of capacitor bank with damping network. CONCLUSION. This paper presents a new design method for capacitive compensating units with damping networks for industrial power systems with powerful nonlinear loads. The paper illustrates superior performance characteristics of proposed shunt capacitive compensating units by computer simulations.

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“…Various algorithms for selecting C-type filters have been proposed in the literature [29][30][31][32][33][34]. However, the developed algorithms were verified mainly during computer simulations, and the selected parameters have never been tested in a real-world setting.…”

Section: Introductionmentioning

confidence: 99%

Selection of C-Type Filters for Reactive Power Compensation and Filtration of Higher Harmonics Injected into the Transmission System by Arc Furnaces

Lange

Redlarski

2020

Energies

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This article presents a method for selecting the elements of a C-type filter working with a conventional LC-type filter for compensating reactive power and filtering out higher harmonics generated by arc furnaces and ladle furnaces. The study was conducted in a steel mill supplied by a 110 kV transmission system, where higher harmonic currents and nonlinear loads were measured. A series of computer simulations were performed under various operating conditions, and an algorithm for selecting the parameters of a third-order C-type filter (for suppressing the second harmonic) and two second-order LC-type filters (for suppressing the third harmonic) was proposed. The filtering system was tested in an arc furnace with the highest rated power, and harmonics in the current spectrum were evaluated. The results of the measurements were used to analyze the effectiveness of the compensation system comprising two passive C-type and LC-type filters at different system configurations. C-type filters significantly influenced current harmonics. The influence of the changes in the number of arc furnace transformers on the true Root Mean Square (RMS) of the currents injected into the 110 kV transmission system and on the voltages of the 110 kV busbars was discussed.

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Optimal design and analysis of anti-resonance C-type high-pass filters

Cited by 17 publications

References 10 publications

Robust Design Scheme of C-Type Filter Considering Harmonic Dynamic Characteristics of Traction Power Supply System

Robust Design Scheme of C-Type Filter Considering Harmonic Dynamic Characteristics of Traction Power Supply System

Shunt power factor correction devices for damping of harmonic resonance in industrial power systems

Selection of C-Type Filters for Reactive Power Compensation and Filtration of Higher Harmonics Injected into the Transmission System by Arc Furnaces

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