Method for calculating radio interference suffered by a communication device mounted on an electric power tower

Patent metadata

Field	Value
Publication number	US-11619663-B2
Application number	US-202017002074-A
Country	US
Kind code	B2
Filing date	Aug 25, 2020
Priority date	Oct 31, 2019
Publication date	Apr 4, 2023
Grant date	Apr 4, 2023

Abstract

Disclosed is a method for calculating radio interference suffered by a communication device mounted on an electric power tower. The method includes: establishing a relative position model of the communication device mounted on the electric power tower and transmission lines, calculating interference field strength of the communication device on the electric power tower, and determining whether the radio interference field strength at the mounting point satisfies the requirements.

First claim

What is claimed is:

1. A method for calculating radio interference suffered by a communication device mounted on an electric power tower, comprising:
1) determining, according to an erection method of electric power towers and electric transmission lines, a radio interference field strength calculation method to be used, calculating an interference value, and calculating a number of charges on a surface of each wire;
2) establishing an approximate cutting model for a sag of a wire between two electric power towers, equating the each wire with the sag as a circular arc, and dividing the circular arc into m segments to make each segment of the circular arc equal to a horizontal straight segment, and linearly allocating a number of charges in each segment according to a segmentation weight;
3) calculating each segment according to the radio interference field strength calculation method, substituting a calculated value into a formula for lateral change of interference field strength, and obtaining an interference field strength component of each segment at an observation point, wherein the observation point is a mounting point prepared for a communication device;
4) geometrically superimposing interference field strength components generated by the segments of the each wire, and then vectorially superimposing interference field strength values obtained from same-name phase wires of different loops;
5) calculating an interference field strength of a corresponding frequency from a radio interference field strength at 0.5 MHz from step 4) by using a formula of field strength changing with frequency;
6) determining whether the radio interference field strength at the mounting point satisfies requirements, wherein when the radio interference field strength does not satisfy the requirements, the mounting point is lowered and the steps are repeated until the requirements are satisfied, and
7) wherein when the radio interference field strength satisfies the requirements, the communication device is mounted at the mounting point.

2. The method for calculating the radio interference suffered by the communication device mounted on the electric power tower of claim 1 , wherein the radio interference field strength calculation method in step 1) comprises an empirical formula method and an excitation function method.

3. The method for calculating the radio interference suffered by the communication device mounted on the electric power tower of claim 1 , wherein in step 2), the m segments are determined by means of a differential principle making a combination of the segments approach to a line shape of the each wire.

4. The method for calculating the radio interference suffered by the communication device mounted on the electric power tower of claim 1 , wherein the formula for lateral change of interference field strength is:

E
x

=

E
+

k
⁢

⁢
lg
⁢

4
⁢
0
⁢
0

+

(

H
-
h

)

2

x
2

+

(

H
-
h

)

2

,

wherein E x is a radio interference intensity at the lateral distance x of the each wire, H is an altitude of a corresponding segment; h is an altitude of the mounting point of the communication device on the electric power tower; x is a lateral distance between the mounting point and the each wire or a cut section of the each wire; k is a change coefficient, and has a value of 16.5; and E is the interference value calculated by the excitation function method or the empirical formula method.

5. The method for calculating the radio interference suffered by the communication device mounted on the electric power tower of claim 1 , wherein the geometrically superimposing in step 4) is:

E
i

=

20
⁢

⁢

lg
⁡

[

(

1
⁢

0

E

i
⁢

⁢
1

2
⁢
0

)

2

+

(

1
⁢

0

E

i
⁢

⁢
2

Assignees

• State Grid Jiangsu Electric Power Co Ltd
• State Grid Nanjing Supply Power Company
• State Grid Jiangsu Electric Power Co Ltd Marketing Center

Inventors

• Zhu Hong
• Kong Xiaohong
• Chen Jing
• Zhou Dongxu
• Du Jian
• Liu Shaojun
• Zhang Weiya
• Pi Yichen
• Yang Linqing
• Wang Wendi
• Li Qiusheng
• Shao Mingchi
• Zou Yufeng
• Hu Jun

Classifications

• H04B17/345

  Interference values ({signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]} H04B17/336) · CPC title

• G01R29/0871 Primary

  Complete apparatus or systems; circuits, e.g. receivers or amplifiers (G01R29/0878, G01R29/0892 take precedence; dosimeters, warning devices G01R29/0857) · CPC title

• G01R29/0892 Primary

  Details related to signal analysis or treatment; presenting results, e.g. displays; measuring specific signal features other than field strength, e.g. polarisation, field modes, phase, envelope, maximum value · CPC title

• G01R29/0814

  Field measurements related to measuring influence on or from apparatus, components or humans (EMC, EMI and similar testing in general G01R31/001), e.g. in ESD, EMI, EMC, EMP testing, measuring radiation leakage; detecting presence of micro- or radiowave emitters; dosimetry; testing shielding; measurements related to lightning · CPC title

• G06Q50/60 Primary

  Business processes related to postal services (shipping G06Q10/083; franking apparatus G07B17/00) · CPC title