Accurate prediction of the corona noise produced by overhead transmission lines

Donini, Alberto; Spezie, Roberto; Cortina, R.; Piana, Edoardo Alessio; Turri, Roberto

doi:10.23919/aeit.2016.7892760

Cited by 8 publications

(7 citation statements)

References 2 publications

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“…This model has recently been incorporated into a MATLAB ® code, enabling the operators to estimate the sound power level spectrum of transmission lines [24]. The code has been validated by performing long term measurements using a sound level meter on a single circuit, double sub-conductor 380 kV transmission line [25], with an average deviation of 1.5 dB.…”

Section: Corona Discharge Noise Around the Overhead Transmission Linementioning

confidence: 99%

“…The software used is SoundPLAN ® 8.0, a ray-tracing program implementing the procedures included in the reference international regulations. The choice of a professional software has been made for its This model has recently been incorporated into a MATLAB ® code, enabling the operators to estimate the sound power level spectrum of transmission lines [24]. The code has been validated by performing long term measurements using a sound level meter on a single circuit, double subconductor 380 kV transmission line [25], with an average deviation of 1.5 dB.…”

Section: Noise Spreading Modelmentioning

confidence: 99%

“…The study features the experimental characterization of the switchgear, which, to the authors' knowledge, has not yet been sufficiently detailed in the scientific literature. The corona noise emission has been estimated by means of a self-developed MATLAB ® code [24] whose recent validation provided encouraging results [25]. The power level values of the two types of noise source have been fed as input into a specialized software, which made it possible to predict the outdoor sound pressure levels of the whole transmission system, and to simulate the effect of possible mitigation measures.…”

Section: Introductionmentioning

confidence: 99%

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Maintenance of a High-Voltage Overhead Transmission Line: Sustainability and Noise Impact Assessment

et al. 2018

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Abstract:Overhead high-voltage lines are a common choice for power transmission, but their planning, installation and management are often challenging tasks because of the surrounding public interest and of their importance as critical infrastructures. This is particularly true in the case of industrial installations requiring a high continuity of service. The working group formed by the University of Brescia (UniBS), the University of Padova (UniPD), and Torino Transmission Operating Area (AOT) of Terna Rete Italia S.p.A. (Terna) has studied an innovative solution featuring a remotely-operated switchgear mounted directly on the trellis holding the conductors. This strategy reduces visual impact, land use and vulnerability of the system to weather adversity, but noise exposure of the population requires appropriate study. This work introduces a new technical solution, discusses its benefits, and assesses the audible noise impact of the improved transmission line, considering the combined effect of switchgear action and corona discharge around the conductors. The sound emission data are fed as input into a sound propagation software enabling evaluating the noise perceived by people living in the neighborhoods. A mitigation solution is proposed and analyzed.

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Section: Corona Discharge Noise Around the Overhead Transmission Linementioning

confidence: 99%

Section: Noise Spreading Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Maintenance of a High-Voltage Overhead Transmission Line: Sustainability and Noise Impact Assessment

et al. 2018

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“…Sanders et al [9] state that "if it is properly taken into account during the design phase", noise is not a problem in new installations, thus implying that indeed it might be an issue when not thoroughly considered, or in the case of expansion of existing installations, which are usually stretched to the limit. When designing or revamping a power substation, equipment with noise emissions below the manufacturer's standard can be required to reduce continuously radiated discrete tones [8], impulse noise [10] and corona discharge noise [11].…”

Section: Introductionmentioning

confidence: 99%

On the Control of Low-Frequency Audible Noise from Electrical Substations: A Case Study

Piana

Roozen

2020

Applied Sciences

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With the world facing the urgency of energy transition, the development of efficient and quiet electrical infrastructures is of topical importance in the construction of the environment of the future. The problem of noise from power distribution systems is often underestimated, although several works in the literature underline the effect of disturbance on the population, especially concerning the low frequency range. This paper overviews the issue of the low-frequency noise generated by electrical substations, from the experimental characterization of the source to the possible mitigation measures at the source, along the propagation path and at the receiver. Alongside the general presentation, a case study serves as a practical demonstration of the proposed methodological approach. It was found that in the investigated situation the main disturbance comes from the transformer at two low-frequency harmonics of twice the networking frequency. A traditional noise barrier is designed taking into account the strict size constraints imposed by technical compatibility with the electrical infrastructure, which limits its efficacy at low frequency. Noise masking with broadband signals can be a complementary solution to further reduce noise disturbance and contain it within prescribed limits. The evaluation of subjective response of the receivers to different mitigation solutions is made possible by the availability of the impulse response.

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“…A compactor is a simple mechanical system composed by three long rod insulators, disposed to form an equilateral triangle, with each side connected between two phase conductors, as briefly represented in Figure 1. Reducing the phase-to-phase distance, an increase of the electric field close to the line conductors is expected, however both radio and audible noises are accurately predictable through [15]. Considering an ideal line making use of the same tower type at both the span end points, in the case several compactors are added along the span, they are generally expected to be placed symmetrically as regards to the span central point.…”

Section: Introductionmentioning

confidence: 99%

Use of Rod Compactors for High Voltage Overhead Power Lines Magnetic Field Mitigation

et al. 2017

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Abstract:In the last decades, strengthening the high voltage transmission system through the installation of new overhead power lines has become critical, especially in highly developed areas. Present laws concerning the human exposure to electric and magnetic fields introduce constraints to be considered in both new line construction and existing systems. In the paper, a technique for passive magnetic field mitigation in areas close to overhead power lines is introduced, fully modelled and discussed through a parametric analysis. The investigated solution, which basically consists in approaching line conductors along the span making use of rod insulators, is applicable on both existing and under-design overhead lines as an alternative to other mitigating actions. Making use of a 3-dimensional representation, the procedure computes both positions of phase conductors and forces acting on insulators, towers, conductors and compactors, with the aim of evaluating the additional mechanical stress introduced by the compactors. Finally, a real case study is reported to demonstrate and quantify the benefits in terms of ground magnetic field reduction achievable by applying the proposed solution, in comparison to a traditional configuration. Furthermore, using compactors to passively reduce the magnetic field is simple to be applied, minimally invasive and quite inexpensive as regards to alternative mitigating actions.

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Accurate prediction of the corona noise produced by overhead transmission lines

Cited by 8 publications

References 2 publications

Maintenance of a High-Voltage Overhead Transmission Line: Sustainability and Noise Impact Assessment

Maintenance of a High-Voltage Overhead Transmission Line: Sustainability and Noise Impact Assessment

On the Control of Low-Frequency Audible Noise from Electrical Substations: A Case Study

Use of Rod Compactors for High Voltage Overhead Power Lines Magnetic Field Mitigation

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