Contribution identification method for noise at boundary of urban substation

Patent metadata

Field	Value
Publication number	US-12198079-B2
Application number	US-202217894185-A
Country	US
Kind code	B2
Filing date	Aug 24, 2022
Priority date	May 25, 2021
Publication date	Jan 14, 2025
Grant date	Jan 14, 2025

Abstract

A contribution identification method for noise at a boundary of an urban substation in the present disclosure includes the following steps: describing site elements and surrounding environmental elements of an urban substation; measuring and recording a background noise value at each boundary of the urban substation; determining an orientation of a specific sound source of the urban substation, and setting a corresponding measurement point at each boundary of the urban substation; obtaining a spectrum of each specific sound source; analyzing a contribution of each intra-substation sound source of the urban substation to noise at the boundary of the substation; analyzing a noise level of each sound source measurement point in the urban substation; recording measured data during noise measurement, and correcting a noise measurement result; and generating a test report.

First claim

The invention claimed is:

1. A contribution identification method for noise at a boundary of an urban substation, comprising the following steps:
S 1 : describing site elements and surrounding environmental elements of an urban substation, wherein the site elements comprise an eastern boundary, a western boundary, a southern boundary, and a northern boundary of the urban substation;
S 2 : measuring and recording a background noise value at each boundary of the urban substation, wherein a position at which background noise is measured is different from that at which noise at the boundary of the urban substation is measured, and the background noise value is obtained by a sound level meter by measuring a 1-min equivalent continuous A-weighted sound pressure level in the daytime and at night separately;
S 3 : determining an orientation of a specific sound source of the urban substation, and setting a corresponding measurement point at each boundary of the urban substation;
S 4 : recording a 1-min equivalent continuous A-weighted sound pressure level by using the sound level meter at the measurement point, and then measuring a 1-min equivalent continuous A-weighted sound pressure level and analyzing a spectrum by using an acoustic imaging device for each specific sound source, to obtain the spectrum of each specific sound source;
S 5 : taking, in a frequency range of 20 Hz to 20 kHz, a union of a ⅓-octave center frequency and an integer-multiple frequency of a power frequency as a complete frequency component set; setting S l as an emission limit of boundary environmental noise in a region in which the urban substation is located; and in the complete frequency component set, selecting a frequency component with a sound pressure level greater than or equal to (S l −20 dB) as a specific frequency component participating in contribution calculation, and analyzing a contribution of each intra-substation sound source of the urban substation to the noise at the boundary of the urban substation, wherein a contribution C 1 of an intra-substation sound source S 1 to the noise at the boundary of the substation is calculated according to the following formula (1):

C
1

=

∑

j
=
1

n

a

1
⁢
j

2

∑

i
=
1

m

∑

j
=
1

n

a
ij
2

(
1
)

wherein a 1 j represents a j th specific frequency component in n frequency components of the intra-substation sound source S 1 , and a ij represents a j th specific frequency component of an i th specific sound source in m specific sound sources;
S 6 : setting, as p t , sound pressure corresponding to a 1-min equivalent continuous A-weighted sound pressure level that is of environmental noise and recorded by the sound level meter at the measurement point, setting, as p k , sound pressure corresponding to a 1-min equivalent continuous A-weighted sound pressure level that is of an (m−1) th specific sound source outside the urban substation and measured by the acoustic imaging device at the measurement point, and estimating, according to the following formula (2), a boundary sound pressure level for the urban substation and contributed by the intra-substation sound source at the measurement point:

SPL
1

=

10
·

lg
(

p
t
2

-

∑

k
=
2

m

p
k
2

p
ref
2

)

(
2
)

wherein p ref represents reference sound pressure;
S 7 : recording measured data during noise measurement, and correcting a noise measurement result; and
S 8 : generating a test report.

2. The contribution identification method for noise at a boundary of an urban substation according to claim 1 , wherein the describing site elements and surrounding environmental elements of an urban substation specifically comprises:
performing patrol in the urban substation and at the boundary of the urban substation, completing the description of the site elements and the surrounding environmental elements of the urban substation, and making a record, wherein
objects recorded in the description process comprise a boundary outline of the urban substation and a length, a height, and a category of each boundary of the urban substation; a position of an audible noise source and an installation status of a sound absorption facility and a sound barrier in the urban substation; a category of an acoustic environment function zone in which the urban substation is located; positions and distances

Assignees

• State Grid Henan Electric Power Res Institute
• State Grid Corp China

Inventors

• Wang Donghui
• Wang Guangzhou
• Wang Leilei
• Zhang Songyang
• Zhang Zhuangzhuang
• Zhang Jiaqi
• Li Rui
• Lu Lin
• Wang Dong
• Xiao Han
• Yao Degui

Classifications

• G06Q50/06 Primary

  Energy or water supply · CPC title

• G06Q10/04 Primary

  Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem" (market predictions or forecasting for commercial activities G06Q30/0202) · CPC title

• G06Q50/26

  Government or public services (business processes related to the transportation industry G06Q50/40) · CPC title

• G06Q10/0639 Primary

  Performance analysis of employees; Performance analysis of enterprise or organisation operations · CPC title