1200KV ULTRA HIGH VOLTAGE TRANSMISSION SYSTEM

SEMINAR REPORT ON

By :- Prannaya Kumar Giri Binay Prasad Giri

Indian power sector is growing at an accelerated pace . In a bid to further boost the

transmission capacity of the country, India has moved towards Ultra High voltage (UHV)

transmission level.

India has adopted 1200 KV ultra high voltage (UHV) AC system to power transfer over a

large geographical area.

To develop 1200 kV AC Transmission System and associated equipment indigenously, a

joint initiative is taken by POWERGRID, CPRI and Equipment Manufacturers to set up a

1200 kV Testing Station and an experimental line at BINA in Madhya Pradesh.

INTRODUCTION

INDIAN POWER SYSTEM - PRESENT Installed Capacity: 147GW Peak Demand: 109 GW Transmission Grid Comprises:

765kV Lines - 1600 ckt. km 400kV Lines - 76,000 ckt. km 220/132kV Lines - 115,000 ckt. km HVDC bipoles - 3 nos. HVDC back-to-back - 7 nos.

NER, ER, NR & WR operating as single grid of 100 GW

SR Grid – 40 GW Inter-regional capacity : 18,700 MW

NER

ER

NR

WR

SR

BALIMELA

KOLHAPUR

UJJAIN

PONDA

SR

CHANDRAPUR

NAGJHARIBELGAUM

WR

GWALIOR

U.SILERU

1000MW

RAIPUR

VINDHYACHALKORBA

KOTA

MALANPUR

AURAIYA

AGRA

NR

GORAKHPUR

BALIA

PURISAHU

500MW

ERBUDHIPADAR

GAZUWAKA

MW1000

ROURKELATALCHER

DEHRI

SALAKATI

MUZAFFARPUR

PATNABARH

SASARAM

BIHARSHARIFF

BIRPARA

MALDA

NERBONGAIGAON

M'SARAI/A'BAD

RANCHISIPAT

Inter-Regional Capacity-18700 MW

NATIONAL GRID-EXISTING

Eastern Region

Western Region

Southern Region

Northern Region

North-easternRegion

6330 MW

1260 MW

2990MW

3630 MW

1720 MW

2120 MW

NATIONAL GRID - PRESENT

WHY WE ARE GOING TO 1200KV TRANSMISSION

Need for ultra high voltage (UHV) transmission level power over large distances

without any fault.

Economical transmission of large amount of power.

Stabilization of the power system to withstand large generation and transmission

outages.

Limitation of the number of transmission line in order to reduce environmental

impact and land use.

1200 KV NATIONAL TEST STATION Two 1000 MVA 1200/400/33 kv auto

transformers

Two 1200kv & 400kv bays

One 1200kv line single circuit (about 1.1

km long)

One 1200kv line double circuit line (about

0.8 km long)

(THE SINGLE LINE DIAGRAM OF THE TEST STATION ) The portion marked with red colour is 1200kV Test Station.

1200kV AC TRANSMISSION LINE TECHNICAL PARAMETERS

(The outcome of field tests to be conducted at test station at Bina.) 1 p.u= 978kv(1200*1.41/1.732)

TECHNICAL PARAMETERS OF 1200kV EQUIPMENTS

For manufacturers various parameters as worked out for individual equipment:-

Basic Technical Parameters. Circuit Breaker. Current Transformer. Capacitive Voltage Transformer. Surge Arrester. Transformer. ISOLATOR (Knee type/ vertical break / HDB). Insulator Strings. Disc Insulators & Hardware.

BASIC TECHNICAL PARAMETERS:-

(1200KV CIRCUIT BREAKERS)

CIRCUIT BREAKER:-

CURRENT TRANSFORMER:-

CAPACITIVE VOLTAGE TRANSFORMER:-

SURGE ARRESTER:-

The Surge Arrester is four (4) column ZnO type and its technical parameters are as given below :

(850KV, 4 COLUMN SURGE ARRESTERS)

TRANSFORMER:-

ISOLATOR (KNEE TYPE/ VERTICAL BREAK / HDB):-

DISC INSULATORS & HARDWARE:-

INSULATOR STRINGS:-

TRANSMISSION LINE DATASINGLE CIRCUIT HORIZONTAL CONFIGURATION :-

(OCTAGONAL BUNDLE CONDUCTOR)

(CONDUCTOR CONFIGURATION SINGLE CIRCUIT)

LINE DATA FOR DOUBLE CIRCUIT VERTICAL CONFIGURATION:-

(CONDUCTOR CONFIGURATION DOUBLE CIRCUIT )

TRANSMISSION CAPACITY OF DIFFERENT LINE

BENEFIT OF 1200 kV UHV POWER TRANSMISSION Reduction in the current.

Reduction in the losses.

Reduction in volume of conductor material required.

Decrease in voltage drop & improvement of voltage regulation.

Increase in Transmission Efficiency.

Increased power handling capacity.

The no. of circuits & the land requirement reduces as transmission voltage increases.

The total line cost per MW per km decreases considerably with the increase in line voltage.

(382 K.M 1200KV WARDHA- AURANGABAD TRANSMISSION LINE)

0

100

200

300

400

500

600

700

2007 2012 2022Year

GW

Installed CapacityDemand(Peak)Inter Regional Capacity

FUTURE DEMAND & IMPLEMENTATION OF 1200KV UHV AC TRANSMISSION

Reactive power management for 1200kv AC system is an important aspect which require

detail analysis for suitable static and dynamic reactive compensation .

In order to transmit bulk power over long distances that generation station to load center

1200 kv UHV is normally the most cost efficient alternative.

India now has an open field to demonstrate its prowess on building commercial 1,200kv

lines.

Establishment of a 1200kv ac test station at BINA is under progress.

CONCLUSION

Agarwal H. K.Mukharji, A.K. Pal and P.Barua,” design and development of 1200KV transmission

line and substation insulation hardware fittings clamps& connectors”, CIGRE India journal vol.1

issue 2, pp.10-18, 2012.

R.N. Nayak etal, Power Grid Corporation of India, “Integration of 1200kV AC systems for future

Indian Grid”, IEC/CIGRE Beijing, China, July.2007.

M.G.Unde and B.E. Kushare, “Analysis of Electro magnetic Fields of 1200kV UHV-AC

Transmission Lines “. Unpublished.

Second International Symposium on Standards for Ultra High Voltage Transmission 1200kV

Transmission System and Status of Development of Substation Equipment/ Transmission Line

Material in India R.N.Nayak ,M.C.Bhatnagar , B.N.De.Bhowmick, R.K.Tyagi . Power Grid

Corporation of India Limited, India.

REFERENCES

Thank you