Hon’able Members of Standing Committee on Energy WELCOMES POWER GRID CORP. OF INDIA LTD.

Generation :: Heart RLDC::Brain Sub-Transmission :: Sub-Arteries Transmission :: Main Arteries Distribution :: Capillaries An Analogy – Power System & Human Body USER Voltage :: BP Frequency:: Heart beat

POWERGRID Establishment and operation of Regional and National Power Grids to facilitate transfer of power within and across the Regions with reliability, security and economy on sound commercial principles MISSION

POWERGRID -An Overview A neutral transmission service provider.  Started Commercial Operations from  Wheels 45,000 MW i.e. more than 40% of the power generated.  Operates and Maintains  50,000 circuit kms of EHV transmission System  82 nos of EHVAC & HVDC sub-stations With System Availability over 99.5%.

Efforts made by POWERGRID to Stabilize and Commercialize Power Sector Establishment of National Grid Modernisation of RLDCs Introduction of Availability Based Tariff Mechanism to both Generators and Consumers Manning of RLDCs by Senior Level Personnel Introduction of “ Open Access ”

Need for Strong National Grid Generation resources in pockets and remote Load Centres dispersed and distant Multiple Loops and Rings desirable to ensure –Safety, Security and Reliability Demand fluctuations on daily/ seasonal variationDemand fluctuations on daily/ seasonal variation Economy of Operations Reduction in generation reserves

Formation of National Grid Present Capacity 9,000 MW Future Capacity –30,000MW by 2012 Investment Required by 2012 :Rs. 71,000 Crores By POWERGRID :Rs. 51,000 Crore By Pvt. Investors:Rs.20,000 Crores –This investment will also take care evacuation of Central Sector Share of generation planned till –Creation of National Grid of 30,000 MW Capacity will lead to reduction in Capacity addition of 13,000MW i.e. saving of Rs. 50,000 Crore in investments besides fuel cost saving. ………a continuous process

Derived economics of National Grid Merit Order –Pit head stations PLF increasedPit head stations PLF increased –Costly Generation - Boxed up /reducedCostly Generation –Exchange of 18,500 MUs in equivalent to Generating Station of 3000 MW Capacity –Estimated National Saving – Rs. 12,000 Crores in fresh investments –Rs. 1,850 Crores in fuel cost –Additional Saving in Fuel Transportation Expected exchanges in : 22,000 MUs Hydro plant usage– a paradigm shift Importance of Pumped Storage Plants achieved Harnessing of the diversity in occurrence of the Peak Demand amongst Regions, thus peak load flattenedHarnessing of the diversity in occurrence of the Peak Demand amongst Regions

Inter-Regional Exchanges

Modernisation of RLDC/SLDCs by POWERGRID RegionTaken Over from CEA ULDC Commissioning Southern Northern North-Eastern Eastern June 2005* Western March 2006* * Scheduled Target Unified Approach - Features - HierarchicalFeatures State of Art Load Despatch Centres at Regional and State/Area Level.

RTU SUB LDC SLDC ERLDC WRLDCSRLDCNRLDCNERLDC NLDC 23 Nos. 51 Nos Nos. Grid Operation Hierarchy Plant/Sub Station Level Group of Distt. Level State HQ Level Region Level National Level 5 Nos.

AVAILABILITY BASED TARIFF (ABT) Spearheaded by POWERGRID Features:  Unique commercial mechanism linked with frequency  Fixed Charges i.e. Capacity charges  As per Plant Availability.  Variable Charges i.e. Energy charges  As per Schedule.  Unscheduled Interchange(UI) i.e. deviations from schedule ( Schedule – Actual) Unscheduled Interchange(UI) i.e. deviations from schedule ( Schedule – Actual)  Price as per prevailing system frequency Typical Schedule & Drawal

Achievements –Implemented between July 2002 and Nov.’2003 –Improved quality of supply.. –Unutilised capacity harnessed-Pumped StorageUnutilised capacity harnessed –Merit order Operation. – Grid discipline –Emphasis on load forecasting –Discourage overdrawals during low frequency –Facilitate bi-lateral trading –Maximisation of generation availability AVAILABILITY BASED TARIFF

Grid Status – Before formation of National Grid, Modernisation of RLDCs and introduction of ABT Large Frequency fluctuations  48.0Hz to 52 Hz. Low Voltages  400kV going down upto 300kV Frequent Grid Disturbances Sub-Optimal Operation High Technical loss Grid Operation on fire fighting instead of Optimisation & Economy

Open Access in inter-State Transmission Guidelines formulated by POWERGRID in consultation with CERC and implemented w.e.f. May’2004 Non- discriminatory / Transparent Process Freedom to buy/sell power Efficient Market Mechanism to address supply / demand mismatches Encourage investment in Transmission Overwhelming response – –More than 200 additional transactions effected from May’04 till Aug.’04 –5300 MUs transacted through Open Access besides unscheduled interchanges

Short Term Open Access– (upto 1 year usage) –Trading of surpluses –Subject to inherent design margins, margin available due to variation in power flow, in-built spare capacity available –Economically priced ( ¼ th of long term transmission charges) –Reliable settlement system Long Term Open Access– ( >25 year usage) –Subject to System Studies and transmission planning criteria for augmentation/ new transmission Schemes –Higher Priority over Short Term Open Access MARKET DESIGN

Market Design… UI – Spot Market –Unscheduled exchanges with the pool. –No trader involved –Price linked to system frequency which is displayed on the users screen –Robust settlement system –No vested interest of POWERGRID Trading Long / Short term directly or through trader under bilateral contracts. Spot trading through UI.

International Practices in Grid Operation Two Models –TSO (Transmission System Operator) responsible for Transmission and System development and Operation. Being practiced in U.K., South Africa,France, Malaysia, Korea & other European countries –ISO (Independent System Operator)ISO (Independent System Operator) Being practiced in USA, Germany, Spain on co- operative approach –Transmission with multiple agencies –USA now shifting towards TSO –Canada mix of TSO & ISO –China : TSO + Generation

CHALLENGES Right of Way becoming increasingly difficult on account of –Forest Clearance –Tree Cutting –Reduction of Land Value Being addressed as under: –Design of Compact Tower & Tall Towers as per need –Uprating & Upgrading of existing Transmission lines through Use of High Temperature Conductors Use of Series Capacitors with/without Thyristor Control Conversion from low voltage to high voltage Law & Order –J&K,NER, Telangana, Bihar Demand Supply Gap- threatens the Grid Stability Private sector investment Time consuming process for project approval

Few Suggestions ……………………… to rejuvenate Power Sector.? Institution Building Network expansion –Transmission –Sub. Transmission –Distribution Augmentation of Load Despatch & Communication in distribution leading to –Transparency and Trust Building at all levels Distributed Generation Introduction of Intra-State ABT Open Access in Intra State Transmission & Distribution Flattening of Load Curve leading to –Economic power supply to agriculture in odd hours Creation of robust uniform market mechanism

POWERGRID, INDIA

MAJOR AND MINOR DISTURBANCES SINCE 1994 NO DISTURBANCES DESPITE LOSING ENTIRE SUPER GENERATING PLANTS LIKE RAMAGUNDAM,VIJAYAWADA,KOTHAGUDEM, NORTH CHENNAI, SHARAVATHY ETC

DEEP VALLEY SHARP PEAK

Frequency Profile of SR NEXT

Frequency Profile of ER FREQUENCY CURVE 6th June02 6th June Time (Hrs.) Frqe (Hz.)

765 KV RING MAIN SYSTEM THE POWER ‘HIGHWAY’ CHEAP HYDRO POWER FROM THE NORTH-EAST AND PIT HEAD THERMAL POWER FROM THE EAST ENTERS THE RING AND EXITS TO POWER STARVED REGIONS

Utility % PLF % PLF % increase DVC Orissa WBPDCL55562 CESC68725 DPL NTPC Region52568 Generation PLF (Thermal) ER

MERIT ORDER : UNITS BOXED UP-SR POWER STATIONSTATE CAPACITY(M W)FUEL VARIABLE COST TATA DIESELKARNATAKA79DIESEL308 RAYALSEEMA DGPPKARNATAKA27DIESEL360 YELEHANKA DIESELKARNATAKA128DIESEL314 THANRBHAVIKARNATAKA220NAPTHA325 SUB-TOTAL454 BRAHAMPURAM DPPKERALA107DIESEL275 BSESKERALA157NAPTHA308 KASARGODE PCLKERALA22NAPTHA298 KAYAMKULAMKERALA360NAPTHA322 SUB-TOTAL646 BASIN BRIDGETAMIL NADU120NAPTHA584 P.P.NALLURTAMIL NADU330NAPTHA415 SUB-TOTAL450 TOTAL1550

ULDC-THE EYES AND EARS OF THE SYSTEM OPERATOR All constituents get the same data in real time. –Transparency & Synergy in operation. Quantum leap in visibility to operator. –Increased confidence & Focus on security and economy. Premptive, dynamic “early warning” systems. Grid less vulnerable to disturbances. Accurate and easy analysis of grid incidents Faster restoration after perturbation Comprehensive energy management system functions. –Contingency evaluation, Security assessment and State Estimation

UI RATE Rate of Unscheduled Drawal/Injection Frequency (Hz)Rate (p/u) Above and below570

KADAMPARAI PUMP OPERATION GENERATOR MODE PUMP SAVINGS OF RS 40 LAKHS EVERY DAY INVESTMENT OF 1600 CRORES SAVED

NER peak 5:30 pm ER Peak 6:00 pm WR Peak 6:45 pm Diversity of peaks

Schedule Vs Actual Injection at NYL TS II ST 2 NEXT

Schedule Vs Actual Drawal by AP

EUROPEAN & SOUTH AFRICAN MODEL GGG DDD T + SO G D G D This model is followed in UK by NGC, in Norway by Statenett, in Sweden by Svenska Kraftnet, in Finland by Fingrid, in Netherland by Tennet, in Denmark by Eltral/Elkrafts and in South Africa by Eskom. NEXT

AMERICAN MODEL GGG DDD TT G D G D G D TSO RTORTO This model is followed in USA. Based on their experience, USA is now moving towards TSO model through RTO.

11,700 MW 2,650 MW 5,850 MW 4,900 MW 1,200 MW 3,700 MW 30,000 MW OF INTER- REGIONAL POWER BY 2012 EASTERN REGION SOUTHERN REGION WESTERN REGION NORTHERN REGION NORTH- EASTERN REGION INTER-REGIONAL TRANSFER BY 2012

Inter Regional Links Present IR Capacity = 9,000 MW 700 MW 1200MW 2000MW 900 MW 30,500 MW 16,000 32,700 MW 30,500 MW MW 1650 MW Next

Major inter-Regional Link Inter-Regional LinkProject Cost (Rs. in Crores) Commissioning Date ApprovedActualScheduledActual TALCHER – KOLAR (2000 MW) ER-SR June’03Dec.’02 RAIPUR-ROURKELA (1000 MW) ER-WR Dec.’03Jan.’03 SASARAM-HVDC (500 MW) ER-NR Dec.’01June’01

Technical Losses w.r.t. Voltage Power (P)= Voltage * Current = V*I Losses = (Current) 2 * Resistance = I 2 *R Power is proportional to current, voltage remaining constant. To draw the same power at low voltage, one has to draw more current e.g.; 100 MW = 400kV * 250 Amps 100 MW = 320kV * 312 Amps Losses increases by 55% for 20%reduction in voltage. Losses doubles for about 30% reduction in voltage. e.g. Loss reduction in SR by 1% has given an annual saving of about Rs 290 crores

INDIAN POWER SECTOR - AT A GLANCE REGIONINSTALLED CAPACITY (MW) ENERGY CONSUMPTION MUs/day PEAK DEMAND MET(MW) NORTHERN30, ,000 EASTERN17, ,000 WESTERN32, ,000 SOUTHERN29, ,000 NORTH EAST2,334251,100 TOTAL112,0582,00078,000

REALITY BITE: FARMERS IN KARNATAKA ARE HAPPY WITH FEWER HOURS OF QUALITY POWER!!. EFFICIENCY OF PUMPS AT TG HALLI WATER WORKS IMPROVED! COMPARISION OF BANGALORE VOLTAGE-TYPICAL DAY BETTER VOLTAGE PROFILE MEANS LESS ELECTRICAL LOSSES IMPROVEMENT IN VOLTAGE