Design & Wind Stability Analysis Of Horizontal Vee Assemblies
Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24...
-
Upload
irea-sandoval -
Category
Documents
-
view
217 -
download
3
Transcript of Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24...
![Page 1: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/1.jpg)
Design & Wind Stability Analysis Of Horizontal Vee Assemblies
Panel Session PN23Thursday April 24 8-12 am
2008 IEEE Transmission & Distribution Exposition &
Conference
April 2008 Chicago, IL
![Page 2: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/2.jpg)
Horizontal Vee Design
![Page 3: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/3.jpg)
Typical 230 kV (Thirteen Bell) Horizontal Vee Assembly.
![Page 4: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/4.jpg)
500 kV Horizontal Vee Assembly.
![Page 5: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/5.jpg)
Horizontal Vee Loading
![Page 6: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/6.jpg)
Horizontal Vee Loading
Swing Angle = θ
θ = Tan ^-1 H V
![Page 7: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/7.jpg)
Horizontal Vee Loading
L^2 E = Youngs Modulus lbs/in^2
I = Moment of Inertia in^4
L = Strut Length ins.
Critical Buckling Load Of Strut = Pcr = Π^2 x E x I
![Page 8: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/8.jpg)
HORIZONTAL VEE LOADING.
Case No 1: Transverse Load “H” Due to Wind and or Line Angle Acting Towards Structure.
Load in Strut = “Y”
Y = - V x Cos (ά – β) + -H x Sin (ά – β) Sin ά Sin ά
Load in Suspension = “X”
X = + V Cos β - H Sin β Sin α Sin α
![Page 9: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/9.jpg)
HORIZONTAL VEE LOADING.
Case No 2: Transverse Load “H” Due to Wind and or Line Angle Acting Away From Structure.
Load in Strut = “Y”
Y = - V x Cos (ά – β) + H x Sin (ά – β) Sin ά Sin ά
Load in Suspension = “X”
X = + V Cos β + H Sin β Sin α Sin α
![Page 10: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/10.jpg)
Combined Loading Curve.
![Page 11: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/11.jpg)
![Page 12: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/12.jpg)
Horizontal Vee in normal position
![Page 13: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/13.jpg)
Horizontal Vee under broken conductor condition.
![Page 14: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/14.jpg)
Wind Load
Suspe
nsio
n Stri
ng
P
(H)W sin
W
Strut Insulatorof Length (S)
Axis ofRotation
Fac
e of
Str
uctu
re
A
A
HORIZONTAL VEE STABILITY
![Page 15: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/15.jpg)
Line
C
W sin
T
H cos
Axis ofRotation
View A-A
Swung Position
HORIZONTAL VEE STABILITY
T = (W Sinθ + H Cosθ) Tan ω
![Page 16: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/16.jpg)
HORIZONTAL VEE STABILITY
T = (W Sinθ + H Cosθ) Tan ω
If (W Sinθ + H Cosθ) > 0 Assembly & System Are Stable.
If (W Sinθ + H Cosθ) < 0 System Stability is Dependent On
Line Parameters.
![Page 17: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/17.jpg)
Horizontal Vee Wind Stability Analysis.
Computer program developed to evaluate system parameters.
Original program developed under EPRI Project No. 561. for determining longitudinal loads imposed on transmission line systems under broken conductor and/or unequal ice loading. (BRODI 1)
BRODI 1 program was modified to consider longitudinal loads caused by transverse wind loading on transmission line systems supported by Horizontal Vee insulator assemblies.
![Page 18: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/18.jpg)
Line Parameters Horizontal VeeAss’y Parameters
Wind Load Input
*Conductor = Effective Length = *Base Wind
Weight = Weight = Magnitude
Diameter = Hinge angle = Direction (15 Degrees)
Area = Projected Area = *Gust Wind (Not Used)
Modulus of Elasticity = Magnitude
Coefficient of Expansion = Direction
Number Of Conductors =
Line Tension =
*Span Lengths
Number Of Spans =
Angle effects
INPUT DATA.
![Page 19: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/19.jpg)
Horizontal Vee Wind Stability
Wind orientation 15° From Perpendicular Worst Case.
![Page 20: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/20.jpg)
Horizontal Vee Wind Stability
![Page 21: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/21.jpg)
DEADEND
38 SPAN SECTION( 490' TO 869' )
DEADEND
Wind Stability Analysis (1).
Required To Be Stable At 100 MPH.
![Page 22: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/22.jpg)
Input File
![Page 23: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/23.jpg)
Output File 74 MPH
![Page 24: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/24.jpg)
Output File 75 MPH
![Page 25: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/25.jpg)
Output File 75.2 MPH
![Page 26: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/26.jpg)
DEADEND
38 SPAN SECTION( 490' TO 869' )
DEADEND
38 Span Section Stable At 74 MPH.
Wind Stability Analysis (1)
![Page 27: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/27.jpg)
18 SPAN SECTION
DEADEND
DEADEND
20 SPAN SECTION
STABILITYSTRUCTURE (1)
Wind Stability Analysis (2)
![Page 28: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/28.jpg)
18 SPAN SECTION
DEADEND
DEADEND
20 SPAN SECTION
STABILITYSTRUCTURE (1)
Wind Stability Analysis (2)
Eighteen Span Section Unstable At 107 MPH - Stable At 102 MPH (∆≤5°) Twenty Span Unstable At 105 MPH - Stable At 95 MPH (∆≤ 5°)
![Page 29: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/29.jpg)
STABILITYSTRUCTURE (1)
14 SPAN SECTION
DEADEND
DEADEND
12 SPAN SECTION12 SPAN SECTION
STABILITYSTRUCTURE (2)
Wind Stability Analysis (3).
![Page 30: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/30.jpg)
STABILITYSTRUCTURE (1)
14 SPAN SECTION
DEADEND
DEADEND
12 SPAN SECTION12 SPAN SECTION
STABILITYSTRUCTURE (2)
Wind Stability Analysis (3)
Fourteen Span Section Unstable At 125 MPH Stable At 110 MPH (∆≤ 5°)Twelve Span Section Unstable At 145 MPH Stable At > 110 MPH (∆≤ 5°)Twelve Span Section Unstable At 160 MPH Stable At > 110 MPH (∆≤ 5°)
Differential Tension At 100MPH at Structure 1 = 14,947lbs – 14,658 lbs = 289 lbs.Differential Tension At 100MPH at Structure 2 = 14,817lbs – 14,521 lbs = 296 lbs.
![Page 31: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/31.jpg)
Tripod Assembly
Top View Side View
![Page 32: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/32.jpg)
345 kV (Eighteen Bell) Tripod Assembly.
![Page 33: Design & Wind Stability Analysis Of Horizontal Vee Assemblies Panel Session PN23 Thursday April 24 8-12 am 2008 IEEE Transmission & Distribution Exposition.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5514aa1d550346ea6e8b5df3/html5/thumbnails/33.jpg)
Horizontal Vee Stability Analysis.
For further information on this subject refer to IEEE paper 81 TD 711-1 presented at IEEE PES 1981 Transmission and Distribution Conference and Exposition, Minneapolis, Minnesota, September 20 – 25, 1981.