1. Frankfurt (Germany), 6-9 June 2011 V Ramesh – India – Session 1: Network components – 1096 Integrated Switching Devices (ISD) V.RAMESH ABB Limited, Nashik, India

2. Frankfurt (Germany), 6-9 June 2011 Integrated Switching Devices (ISD)  India Power scenario: Fifth largest electricity generation in the world. Total installed capacity is 172,000 MW Additional 100,000 MW of power by 2017 + 100 000 by 2022 i.e., doubling the capacity in next 10 years Still ~60 % of populations are in rural India. As the economic growth, generation of employment, alleviation of poverty and human development, especially in rural areas hugely depends upon the electrification of villages, rural electrification is viewed as the key for overall development of India. V Ramesh – India – Session 1: Network components – 1096

3. Frankfurt (Germany), 6-9 June 2011 Introduction: Case study: India’s Rural électrification India is working towards power for all by 2012 but still over 100,000 (appxo 10%) villages are to be electrified. The government of India launched the “Rajiv Gandhi Grameen Vidyutikaran Yojana (RGGVY)” in 2005 with the objective of providing access to electricity to all households and improving the rural electricity infrastructure. This scheme addresses both the issues of improving the power availability by creating a rural electricity distribution back bone Decentralised distributed generation for villages where grid facility is not feasible or not cost effective. V Ramesh – India – Session 1: Network components – 1096 Integrated Switching Devices (ISD)

4. Frankfurt (Germany), 6-9 June 2011 Issues - India’s Rural électrification  The distribution networks have grown without master plan.  Rural electrification in India has been almost entirely carried out by extending the grid. The lines meander along tortuous routes, linking one village to another, the conductor sections are often inappropriate  Aging transmission and distribution infrastructure like transformer, motors, switchgear etc in rural and semi-urban areas are not only leading to losses, but also swallowing precious power availability.  Distribution network has over 30 % losses  10 to 15 hours of black out / brown out is common in India villages. V Ramesh – India – Session 1: Network components – 1096 Integrated Switching Devices (ISD)

5. Frankfurt (Germany), 6-9 June 2011 V Ramesh – India – Session 1: Network components – 1096 Integrated Switching Devices (ISD) Fig1: Conventional Substation Layout

6. Frankfurt (Germany), 6-9 June 2011 Présent India’s rural distribution network:  Circuit breaker, Instrument transformers, surge arresters are mounted on a individual structure. Isolators are used on both sides of the circuit breaker.  Large floor space required.  Equipments are Inter connected by long ACSR conductors leads inefficient electrical joints resulting higher watt loss.  A lot of coordinated effort is required for procurement as they are being procured from different suppliers,  The project realisation time from initiation to installation and commissioning is too long.  Operation/ installation of switching equipments by Unskilled labour. V Ramesh – India – Session 1: Network components – 1096 Integrated Switching Devices (ISD)

7. Frankfurt (Germany), 6-9 June 2011 Things to address are  Larger foot print  Longer project duration  High Watt loss  Poor reliability  High safety risk &  Coordination with multiple parties. V Ramesh – India – Session 1: Network components – 1096 Integrated Switching Devices (ISD)

8. Frankfurt (Germany), 6-9 June 2011 Intégration- as a Differentiator:  Integration includes switching devices (Breaker & Isolators), Measuring system equipments (current and voltage transformers), Protection device (surge arrestor) and Control & communication devices (control circuits, HMI and bay controller) Integrated and housed on a simple structure made easy for installation and commissioning.  Isolator functions at both the sides of the breakers is achieved vertically movable arrangement of the breaker unit. V Ramesh – India – Session 1: Network components – 1096 Integrated Switching Devices (ISD)

9. Frankfurt (Germany), 6-9 June 2011 Integration- as a Differentiator: V Ramesh – India – Session 1: Network components – 1096 Integrated Switching Devices (ISD) Fig2 Comparision concept-ISD with present substation practice Effective space utilisation Less front print.

10. Frankfurt (Germany), 6-9 June 2011 V Ramesh – India – Session 1: Network components – 1096 Integrated Switching Devices (ISD) Fig3: Circuit breaker with CT & Disconnecting contacts Compact in Size Disconnecting contacts Pole assembly Current Transformer Cabinet

11. Frankfurt (Germany), 6-9 June 2011 V Ramesh – India – Session 1: Network components – 1096 Integrated Switching Devices (ISD) Fig4: Integration of disconnecting action in CB & CT. Support Frame Pole unit assembly Telescopic Arrangement Drive

12. Frankfurt (Germany), 6-9 June 2011 V Ramesh – India – Session 1: Network components – 1096 Integrated Switching Devices (ISD) Fig 5a : Disconnetor contacts in engaged condition Bird/ phase Guards Fig 5b : Disconnetor contacts in disengaged condition Self aligning contacts

13. Frankfurt (Germany), 6-9 June 2011 V Ramesh – India – Session 1: Network components – 1096 Integrated Switching Devices (ISD) Fig 6a : Mechanical lift (Motor Optional) Fig 6b Hydraulic Lift

14. Frankfurt (Germany), 6-9 June 2011 V Ramesh – India – Session 1: Network components – 1096 Integrated Switching Devices (ISD) Fig7a: ISD in Service Fig7b: ISD in disconnected position

15. Frankfurt (Germany), 6-9 June 2011 V Ramesh – India – Session 1: Network components – 1096 Integrated Switching Devices (ISD) Fig 8: ISD A comparision of Options.

16. Frankfurt (Germany), 6-9 June 2011 Advantages:  Compact  Smaller Foot Print  Easy to Install  Easy to Operate  Easy to Maintain  Enhanced Operator Safety  Reliable  Reduced life Cycle Cost  Less Logistics V Ramesh – India – Session 1: Network components – 1096 Integrated Switching Devices (ISD)

17. Frankfurt (Germany), 6-9 June 2011 Intelegent Automation:  The integrated switching device with its integrated sensors and combined functionalities supports automation process very well.  New “intelligent” interfaces can be incorporated in ISD.  New IED’s (Intelligent Electronic Device) combined with the latest information, communication and secondary equipment technology shall form a base for enhanced protection, control and monitoring of substations which will replace all electrical wires by high-speed communication links, except for the auxiliary power supply.  Auxiliary relays for protection and control logics shall be replaced by programmable logic controller functionality. V Ramesh – India – Session 1: Network components – 1096 Integrated Switching Devices (ISD)

18. Frankfurt (Germany), 6-9 June 2011 Smart Grid Application & Automation:  One crucial function of Smart Grids is that it provides a reliable power supply through the use of digital information, automated control system.  The new generation feeder automation IEDs based on ABB Relion® product platform gives the flexibility to the users to select the appropriate level of automation enquired for their specific need. V Ramesh – India – Session 1: Network components – 1096 Integrated Switching Devices (ISD)

19. Frankfurt (Germany), 6-9 June 2011 Conclusion:  In this paper, a new concept of Integrated Switching Device (ISD) is proposed for outdoor overhead connected distribution network system.  This new architecture includes devices like circuit breaker, disconnector, instrument transformer, surge arrester, protection and communication IEDs integrated in to one compact factory assembled, tested and ready to use units.  This solution is simple, more economical, reliable and safer than the present existing solutions V Ramesh – India – Session 1: Network components – 1096 Integrated Switching Devices (ISD)