Station Post Insulators (SPI), an Emerging Application for Composite Hollow Core Insulators PETER STAHL

Transcription

1 Station Post Insulators (SPI), an Emerging Application for Composite Hollow Core Insulators PETER STAHL

2 Composite Hollow Core Station Post Insulators (SPI) Peter Stahl, July 2015

3 Applications for composite hollow core insulators page 2

4 The today s SPI landscape Porcellain composite solid core page 3 IEC Characteristics of indoor and outdoor post insulators for systems with nominal voltages greater than 1000V 3 rd ed ceramic or glass designs for BIL > 325 kv (U m =170kV) Also organic designs for BIL 325 kv (U m =170kV) IEC Composite station post insulators for substations with a.c. voltages greater than 1000V up to 245 kv, Ed. 1.0, 2006

5 Why Hollow Core Composite? Comparison of C type Porcellain composite hollow core composite solid core Core diameter / mm 200 mm 206 mm 90 mm Weight (factor) 3,3 1,0 1,2 Deflection (factor) 0,2 1,0 8,7 Buckling (factor) 5,1 1,0 0,1 page 4

6 page 5 Cantilever Strength : How to compare porcelain vs composite?

7 Dealing with Moisture Vapor Transmission filling Polymer housing FRP tube page 6

8 Moisture Vapor Transmission is an issue! Calculated water ingress due to MVT into a hollow tube composite insulator over 40 years: <35 g Length 1,6m, OD 166mm page 7

9 Hollow Core Composite Station Post : What s inside? Options? Issues None Solid Liquid Gas pressured Foam Internal electric strength Leak MVTR - condensation Monitoring Weight page 8

10 Electrical properties : PUR based foam Resistance Ohm cm Surface Resistance Ohm Dielectric Constant 1.1 Dielectric Loss Factor page 9

11 page 10 Testing under extreme conditions

12 Steep-front impulse voltage test IEC 62217, Flashover occur externally only No internal flashover page 11

13 Light weight makes Composite Hollow Core Composite Insulators a first choice for seismic applications Surge Arresters Bushings page 12

14 Calculated seismic qualification for composite hollow core bushings Bushing 145kV Bushing can withstand horizontal ground acceleration of 2,5g Bushing 245kV Bushing can withstand horizontal ground acceleration of 2,9g page 13 Actual standards consider ground acceleration of 0,5g even as strong to very strong!

15 HV Station Post Insulators....made from composite hollow core insulators provide the great advantage of leight-weight and thus excellent seismic performance 420kV switchyard Italy/Switzerland But: page 14 No product standard for this application so far!

16 A new IEC standard will be issued soon IEC Composite Hollow Core Station Post Insulators NWIP CD end of 2014 CCDV August 2015 FDIS 2015 page 15

17 62231 Composite solid Station Post 245kV IEC Composite insulator standards Polymeric Insulators Test Methods Composite Hollow Core Insulators Composite Hollow Core Station Post Upcoming IEC will..refer to IEC for composite hollow core concerns..refer to IEC for composite station post concerns..refer to IEC for material related tests page 16 With new IEC, an embracing system is provided for all composite hollow core insulator related applications of today

18 btw: the ANSI/NEMA/IEEE environment looks fragmentary Composite solid Station Post 245kV Polymeric Insulators Test Methods Composite Hollow Core Insulators Composite Hollow Core Station Post ANSI/NEMA/IEEE Composite Insulator Standards C Composite solid Station Post (Draft) C Composite Insulators Test Methods No Composite Hollow Core for US page 17 No Composite Hollow Core Station Post for US

19 The link to the traditional station post world Composite solid Station Post 245kV Polymeric Insulators Test Methods Composite Hollow Core Insulators Composite Hollow Core Station Post IEC Tests on indoor and outdoor post insulators of ceramic material or glass for systems With nominal voltages greater than 1000 V IEC Characteristics of indoor and outdoor post insulators with nominal voltages greater than 1000 V page 18

20 A comparison of definitions SCL 2 MDCL DLL 1,25 MDCL page 19

21 A comparison of definitions SCL 2 MDCL DLL 1,25 MDCL New IEC 62772: MDCL = 1,25 x MML page 20

22 A comparison of definitions SCL 2 MDCL DLL 1,25 MDCL New IEC 62772: MDCL = 1,25 x MML SML = 2,5 MML = 2 x 1,25 x MML = 2 x MDCL SCL page 21

23 page 22 Some applications from the field.

24 page kV Station Post, Switzerland (1)

25 420kV Station Post, Switzerland (2) page 24

26 page m Support Insulator for Middle East

27 page kV DC China

28 page 27 Pantograph type Disconnector

29 Various support and disconnector applications page 28

30 Thank You! EVERY CONNECTION COUNTS Peter Stahl Technical Manager TE Connectivity Solutions GmbH Phone Plant Wohlen Mobile Industriestr. 14 Fax Wohlen / Switzerland PStahl@te.com