Ice-accreted transmission line non-uniform deicing simulation analysis method based on finite particle method

Abstract

The invention discloses an ice-accreted transmission line non-uniform deicing simulation analysis method based on a finite particle method; the method of the invention comprises the steps of initializing particle attributes, setting a path unit, performing transmission line ice accretion form-finding, setting a non-uniform deicing scene, and performing deicing dynamic analysis. In the method, non-uniform deicing simulation analysis for a transmission line is finished via solving of kinematic equations and update iteration of related quantities. The method of the invention enables the problem to be solved that modeling in existing finite element analysis software before transmission line dynamic analysis is complex and tedious, and can provide simulation for mass different complex scenes. The method of the invention is applicable to uniform and non-uniform ice accretions with or with no height differences, non-uniform deicing and other cases, is widely applicable, and has high computing speed.

Description

technical field

[0001] The invention belongs to a method for simulating and analyzing uneven deicing of transmission lines, in particular to a method for simulating and analyzing uneven deicing of iced transmission lines based on the finite particle method. Background technique

[0002] With the rapid development of my country's economy, the requirements for the power system are getting higher and higher. As an important part of the power grid system, transmission lines are the basis for ensuring the safety and stability of the power grid by performing various mechanical calculations and static and dynamic analysis on them. As a flexible cable structure, the transmission wire is only subjected to tension but not compression, and its low stiffness is easily affected by the outside world. As one of the common loads on the transmission wire, the icing load has a great impact on the safety of the transmission line. When the transmission wire deices and vibrates, the towers, ins...

Examples

Embodiment

[0149] Select wire LGJ500 / 45, wire parameters and working condition settings are shown in Table 1:

[0150] Table 1 Conductor characteristic parameters and working conditions

[0151] parameter

unit

value

cross-sectional area

mm 2

531.68

Wire outer diameter

mm

30

unit mass

kg / m

1.688

Elastic Modulus

MPa

65000

Calculate breaking force

N

128100

initial tension

N

23058

Horizontal span

m

300

height difference

m

0

Icing thickness

mm

10

[0152] Perform 100% deicing at the full gear, simulate for 20s, and take the damping coefficient as 0.2. The results of the deicing jump height at the middle position of different methods are shown in Table 2:

[0153] Table 2 The jump height of each method

[0154] method

Jump result (m)

Calculation time (s)

ANSYS

1.5878

/

Finite Element Method

1.5904

602.6

...

technical field

[0001] The invention belongs to a method for simulating and analyzing uneven deicing of transmission lines, in particular to a method for simulating and analyzing uneven deicing of iced transmission lines based on the finite particle method. Background technique

[0002] With the rapid development of my country's economy, the requirements for the power system are getting higher and higher. As an important part of the power grid system, transmission lines are the basis for ensuring the safety and stability of the power grid by performing various mechanical calculations and static and dynamic analysis on them. As a flexible cable structure, the transmission wire is only subjected to tension but not compression, and its low stiffness is easily affected by the outside world. As one of the common loads on the transmission wire, the icing load has a great impact on the safety of the transmission line. When the transmission wire deices and vibrates, the towers, ins...

Examples

Embodiment

[0149] Select wire LGJ500 / 45, wire parameters and working condition settings are shown in Table 1:

[0150] Table 1 Conductor characteristic parameters and working conditions

[0151] parameter

unit

value

cross-sectional area

mm 2

531.68

Wire outer diameter

mm

30

unit mass

kg / m

1.688

Elastic Modulus

MPa

65000

Calculate breaking force

N

128100

initial tension

N

23058

Horizontal span

m

300

height difference

m

0

Icing thickness

mm

10

[0152] Perform 100% deicing at the full gear, simulate for 20s, and take the damping coefficient as 0.2. The results of the deicing jump height at the middle position of different methods are shown in Table 2:

[0153] Table 2 The jump height of each method

[0154] method

Jump result (m)

Calculation time (s)

ANSYS

1.5878

/

Finite Element Method

1.5904

602.6

...

Images