Transcript MILESTONES : TRANSMISSION SECTOR

OPEN ACCESS EXPERIENCES
and
WAY AHEAD
N.R.C BABU
CHIEF MANAGER (MO), SRLDC, POWERGRID
10.08.2009
Open Access in Transmission:
Why and What ?
 Journey …
 Success Story…
 Issues…
 Way Ahead…

REGIONAL
GRIDS
NORTHERN
REGION
NORTHEASTERN
REGION
EASTERN
REGION
WESTERN
REGION
SOUTHERN
REGION
INSTALLED CAPACITY
NORTHERN :-
38,726 MW
EASTERN :-
20,815 MW
SOUTHERN :-
42,377 MW
WESTERN :-
46,348 MW
NORTH-EASTERN :-
TOTAL
2,256 MW
150,519 MW
Energy Resource Map
Hydro
Jammu
Ludhiana
SIKKIM
NEPAL
BHUTAN
Partabpur
RAPP Jaipur
Guwahati
Lucknow
Patna
Pipavav
Bhopal
WR
BANGLA
DESH
ER
Vindhyachal
Gandhinagar
Indore
NER
CHICKEN
NECK
Kolkata
Korba
NM
MA
R
Delhi
MY
A
NR
Talcher/Ib Valley
Raipur
Bhubaneswar
Coal
Tarapur
Mumbai
Hyderabad
Vizag
Simhadri
SR
Bangalore
Kayamkulam
Thiruvananthapuram
Generation
Coal
Krishnapatnam
Kaiga
Kozhikode
Mangalore
LEGEND
Ennore
South Madras
Chennai
Hydro
Cuddalore
Lignite
Coastal
Kudankulam
COLOMBO
Nuclear
SRI LANKA
Load-Centre
Spatial Distribution
Of Load
HYDRO
RESOURCES
Resources
are far away
from Load
centers.
Necessitates
Long
Transmission
links for
evacuation
DELHI
KOLKATTA
MUMBAI
Source:
Powerline
COAL
BELT
BANGALORE
CHENNAI
(Siemens Ad),
Oct-2006
AREAS SHOWN ARE
APPROXIMATE AND INDICATIVE
Diversity details of Regional Grids in India
REGION
REMARKS
Northern Region
Deficit Region
Highly weather sensitive load
North Eastern Region
Very low load
High hydro potential
Eastern Region
Low load
High coal reserves
Pit head base load plants
Western Region
Industrial load and agricultural load
Highly Deficit Region
High load (40% agricultural load)
Monsoon dependent hydro
Southern Region
Necessity for strong transmission backbone …
A strong transmission network backbone is
essential in order to transfer the power across the
length and breadth of the country :
-
Due to high load growth and low generation
avenues in Northern and Western Regions
-
Due to low load and high generation in Eastern
and North Eastern regions
-
Due to high load growth and monsoon
dependent generation availability in Southern
Region
Milestones
1989
Unbundling of CS transmission from generation
- (Formation of National Power Transmission
Corporation .. now POWERGRID)
1991 Generation opened to Private Sector
1995
Unbundling process started in States
- State unbundled into Gencos, Transco & Discom
1998 Electricity (Amendment) Act 1998
1998
Electricity Regulatory Commission Act passed
2003
Electricity Act 2003 enacted in June 2003
2004 CERC Order and Regulations on OPEN ACCESS
Open Access:
Definition As per Electricity Act, 2003
Section 2 (47)
“Open access” means the non-discriminatory
provision for the use of transmission lines or
distribution system or associated facilities with
such lines or system by any licensee or
consumer or a person engaged in generation in
accordance with the regulations specified by
the Appropriate Commission;”
A More general Definition of “Open Access”
“Enabling of non-discriminatory sale/
purchase of electric power/energy
between two parties utilizing the
system of an in- between (third party),
and not blocking it on unreasonable
grounds”
Scope/Applicability…
As per CERC Regulations 2008 Clause 3
Subject to any other regulations specified by the Commission,
the long-term customer shall have first priority for using the
inter-State transmission system for the designated use. These
Regulations shall apply for utilization of surplus capacity
available thereafter on the inter-State transmission system by
virtue of-
(a) Inherent design margins;
(b) Margins available due to variations in power flows;
(c ) Margins available due to in-built spare transmission
capacity created to cater to future load growth or
generation addition:
Agencies involved in Short-Term
Open Access Transaction
•
•
•
•
•
•
•
•
RLDC (s)
SLDC (s)
CTU
STU (s)
Buyer
Seller
Trader
Power Exchanges
OPEN ACCESS:
JOURNEY ...
Open Access in ISTS: Journey…




CERC Regulations on Open Access in Inter State
Transmission implemented w.e.f. 6-May-2004.
CERC amended the above Regulations and the amended
Regulations implemented w.e.f 01-04-2005.
CERC on 25-01-2008 amended the Regulations and the
new Regulations are implemented w.e.f 01-04-2008.
CERC on 20.05.2009 amended the Regulations and the
new Regulations are implemented w.e.f 15.06.2009
Open Access in ISTS: Journey…

Long Term : Twenty five years and above
- Life of the Assets about 25 years
- Existing beneficiaries of a regional transmission
system owned or operated by CTU- deemed long
term customers
- New Long Term Open Access customers: Require
BPTA for inter-State transmission

Short Term : Which is not Long Term
- Essentially a Non firm service
- The service may be curtailed if system security
demands.
Open Access in ISTS: Journey…
CERC OA Regulations 2008

Effective 01.04.2008

Regulations cover only Short-term Open Access

Transactions categorized as
- Bilateral
- Collective (through PX)


Earlier Products of Short-Term retained under
Bilateral Transactions
Nodal Agency
- Bilateral : RLDCs
- Collective : NLDC
Open Access in ISTS: Journey…
CERC OA Regulations 2008

Products –
Short term Access
- Advance
- First Come First Serve
- Day ahead
- Contingency
Long term Access
Provisions relating to Long Term as per the Open Access
Regulations, 2004 to continue, till CERC further notifies.
Open Access in ISTS: Journey…
CERC OA Regulations 2009



Both Buyers and Sellers of Collective transactions
to bear transmission charges and absorb
transmission losses
Inter-Regional links -No Separate treatment.
Emphasis on “Scheduling” rather than
“Reservation”

SLDC consent mandated along with application

In case of Congestion – e-Bidding without Price Cap


Exit Option provided with payment of up to 2 days
open access charges.
Moving towards empowerment of SLDCs
STOA CASE
APTRANSCO to MPSEB
100 MW for One day
from 0000 to 0600 hrs.
APTRANSCO - MPSEB THROUGH NVVNL
(0000 HRS – 0600 HRS) 100 MW AT INJECTION POINT
CUSTOMER:
NVVNL
TRADER:
NVVNL
INJECTING UTILITY
DRAWEE UTILITY
MP
APTRANSCO
MPSEB
INTERVENING REGIONAL LINK
WR
GRID
HVDC BACK
TO BACK AT
BHADRWATHI
IN WR
1. SR-WR
CAPACITY APPROVED
DAILY PERIOD
100 MW
0000-0600HRS
AP
APTRANSCO - MPSEB THROUGH NVVNL
(0000 HRS – 0600 HRS) 100 MW AT INJECTION POINT
EXPORT AT AP
100 MW
LOSSES IN SR
3.12%
AT SR PERIPHERY
96.9 MW
LOSSES IN WR
MP RECIEVES
MP
WR
GRID
HVDC BACK
TO BACK AT
BHADRWATHI
IN WR
4%
93.0 MW
AP
TOTAL LOSSES FOR
TRANSACTION
7.0 MW
APTRANSCO - MPSEB THROUGH NVVNL
(0000 HRS – 0600 HRS) 100 MW AT INJECTION POINT
Payments as per
Regulation 2004 of CERC
APPLICATION PROCESSING FEE
Rs 5000 PER TRANSACTION
MP
SCHEDULING CHARGES PER DAY
1. Rs 3000
FOR SRLDC
2. Rs 3000
FOR WRLDC
WR
GRID
HVDC BACK
TO BACK AT
BHADRWATHI
IN WR
TRANSMISSION CHARGES PER MW
PER DAY
1. Rs 700.91
FOR CTU-SR
2. Rs 881.49
FOR SR-WR LINK
3. Rs 339.98
FOR CTU-WR
TOTAL TRANSMISSION CHARGE
PER UNIT
34.53Ps/.
AP
ST Rate
- in Rs/MW/Day
- Min. Charges for
one day
APTRANSCO - MPSEB THROUGH NVVNL
(0000 HRS – 0600 HRS) 100 MW AT INJECTION POINT
Payments as per
Regulation 2004 Amendment 2005) of CERC
APPLICATION PROCESSING FEE
Rs 5000 PER TRANSACTION
MP
SCHEDULING CHARGES PER DAY
1. Rs 3000
FOR SRLDC
2. Rs 3000
FOR WRLDC
WR
GRID
HVDC BACK
TO BACK AT
BHADRWATHI
IN WR
TRANSMISSION CHARGES PER MW
PER DAY
1. Rs 700.91
FOR CTU-SR
2. Rs 881.49
FOR SR-WR LINK
3. Rs 339.98
FOR CTU-WR
TOTAL TRANSMISSION CHARGE
13.52Ps
PER UNIT
/.
ST Rate
- in Rs/MW/Day , - Charges as per continuous block of
up to 6 hours, 12 hours, and more than 12 hours
AP
APTRANSCO - MPSEB THROUGH NVVNL
(0000 HRS – 0600 HRS) 100 MW AT INJECTION POINT
Payments as per
Regulation 2008 of CERC
APPLICATION PROCESSING FEE
Rs 5000 PER TRANSACTION
MP
SCHEDULING CHARGES PER DAY
1. Rs 2000
FOR SRLDC
2. Rs 2000
FOR WRLDC
WR
GRID
HVDC BACK
TO BACK AT
BHADRWATHI
IN WR
TRANSMISSION CHARGES
1. Rs 60 /MWH
FOR WHEELING
AP
TOTAL TRANSMISSION CHARGE
PER UNIT
7.83Ps/.
Comparison of CERC Regulations on Short-Term Open Access
(Regulation 2004, Amendment 2005 and Regulations 2008)
Old Regulations
(06.05.2004 to
31.03.2005)
Amended
Regulations
(w.e.f. 01.04.2005 to
Regulations, 2008
(w.e.f. 01.04.2008)
Regulations, 2009
(w.e.f. 15.06.2009)
31.03.2008)
Total STOA
Charges
Paisa/Unit
34.53
Total STOA
Charges
Paisa/Unit
Total STOA
Charges
Paisa/Unit
13.52
7.83
DETAILEDCASE
STUDIES.ppt
18.29Total
STOA
Charges
Paisa/Unit
18.29
OPEN ACCESS:
SUCCESS STORY…
IR LINKS CAPACITY
Name of the Link
Capacity(MW)
East-North
Linked with
Barh Project
ER-NR
400 kV Barh-Balia D/C: 1200 MW
ER-WR
400 kV Ranchi-Sipat D/C: 1000 MW
Pusauli-Sahupuri 220kV S/c
100
Sasaram HVDC back-to-back
500
Muzaffarpur-Gorakhpur 400kV D/c (Quad)
2000
Bihar Sharif-Balia 400kV D/c (Quad)
1200
Patna-Balia 400kV D/c (Quad)
1200
Sub-Total
5000
East-West
6200 MW
2800 MW
Budhipadar-Korba 220kV T/c
400
Rourkela-Raipur 400kV D/c
38,018 MW
1400
Sub-Total
1800
West-North
2100 MW
2255
20,516
44,043 MW
1250 MW
Vindhyachal HVDC back-to-back
500
Existing 220kV AC Lines
500
Gwalior-Agra 765kV S/c
1100
Sub-Total
East-South
Gazuwaka HVDC back-to-back
1700MW
1000
Existing 220kV AC Lines
1100 MW
2100
100
Talcher-Kolar HVDC bipole (Enhanced)
Sub-Total
2500
3600
West-South
2500MW
39,656 MW
Chandrapur HVDC back-to-back
IR Capacity=15,450 MW
(Till Sep 2009 = 17,650 MW)
1000
Other lines
700
Sub-Total
1700
East-North East
Bongaigaon-Siliguri 400kV D/c
1000
Birpara-Salakati 220kV D/c
250
Sub-Total
Total
1250
15450
ALL INDIA ATC
(Figure shown are for April-2008)
NORTHERN
REGION
ATC = 900 MW
ATC = 1375 MW
ATC = 1395 MW
NORTHEASTERN
REGION
ATC = 900 MW
ER
WESTERN
REGION
EASTERN
REGION
ATC = 474 MW
ATC =226 MW
ATC = 950 MW
ATC = 750 MW
ATC = 800 MW
SOUTHERN
REGION
ATC = 920 MW
What Is ATC
INTER-REGIONAL TRANSFER BY
END OF 11th PLAN (2012)
3000 MW
NORTHERN
REGION
12650 MW
5000 MW
NORTHEASTERN
REGION
7250 MW
WESTERN
REGION
EASTERN
REGION
2700 MW
SOUTHERN
REGION
3250 MW
3650 MW
37,700 MW OF INTERREGIONAL POWER BY 2012
DETAILS OF TRADE UNDER SHORT TERM OPEN ACCESS
9560
10000
9000
No. of Transactions
No. Of Transactions
8000
7000
5933
6000
28.83
Bu
5000
3938
4000
3000
2000
1000
23.60
Bu
Energy in Billion Units
22.53
Bu
778
16.64
Bu
0
2004-05
2005-06
2006-07
2007-08
YEAR
All India basis
DETAILS OF ADVNCE AND FCFS APPROVED
STOA TRANSACTIONS
886
845
900
737
No. of Transactions
800
23.46
Bu
700
No. Of Transactions
Energy in Billion Units
600
18.49
Bu
500
400
300
19.79
Bu
200
100
0
2005-06
2006-07
YEAR
2007-08
All India basis
DETAILS OF DAY AHEAD AND SAME DAY APPROVED
STOA TRANSACTIONS
8674
9000
No. of Transactions
8000
6.37
Bu
No. Of Transactions
7000
5088
6000
Energy in Billion Units
5000
4000
3201
5.11
Bu
3000
2000
2.74
Bu
1000
0
2005-06
2006-07
YEAR
2007-08
AT A GLANCE 2008 – 2009
EXPORT
IMPORT
AT A GLANCE 2009 – 2010
IMPORT
Open Access – Success Story



Applications Processed (Since Beginning)
> 20,000 No.
Volume (Approved Energy)
(Since Beginning)
> 90BUs
Applications Approved
> 95 %

Refusal/Non-consent by SLDCs
> 3 - 4%

Refusal due to system constraints < 0.5 %
Open Access – Success Story


Transactions between extreme corners of the
country
RGCCPP ( Kayamkulam) to PSEB
Arunachal Pradesh(NER) to PSEB
TNEB to J&K
Large number of Captive Generating plants used
STOA and helped in enhancing the power
availability in grid.
Ugar Sugars (KAR) - JAIPUR (RAJASTHAN)
Godavari Sugars (KAR) - MSEDCL
NCS Sugar(ANDHARA) – GUVNL
Indorama ( MAH) – APPCC ( ANDHRA) MORE DETAILS
Open Access – Success Story



Even costly power was harnessed to meet the high
demand
RGCCPP ( Kayamkulam) (NAPTHA) to PSEB
BSES(KERALA) (DIESEL) to NDMC (DELHI)
Diversity being gainfully utilised by Market players
under STOA
Delhi/TNEB
Export in night ; Import during evening peak
ANDHRA
Export during evening peak ; Import in night
Generators PLF has also increased.
Kayamkulam GPS
- (From 57 % in 2006-07 to 82 % in 2007-08- 82%)
OPEN ACCESS:
ISSUES…
Open Access - Issues



Skewed load – generation pattern
Constrained Transmission Network under certain
conditions
Consents by STU/SLDC for injection of power by
embedded customers

Telemetry

Metering

Scheduling

PPAs
Open Access - Issues

UI Settlement of Intra state entities
-
Before the Implementation of Open Access Regulations
2008, for deviations different STU/SLDCs are charging
differently for embedded customers.
-
At times even the clearance was being withheld for want of
approval philosophy.
In the New Open Access Regulations the issues are being
addressed
OPEN ACCESS:
WAY AHEAD…
Open Access- Way Ahead…

Empowerment of SLDCs

Intra State ABT

Power Exchanges (Pxs)

Easy and workable solutions to tap
micro/mini Non conventional Energy
Resources
Open Access- Way Ahead…
Empowerment of SLDCs
- Greater role assigned to State Load Despatch Centre (SLDC) to
bring them at par with the Regional Load Despatch Centre (RLDC).
- unless specified otherwise by the concerned State Commission, the
UI rate for intra-State entity shall be 105% (for over-drawals/under
generation) and 95% (for under-drawals / over generation) of the UI
Rate at the periphery of regional entity. This has been done to
facilitate dispute free energy accounting and settlement of deviations
for intra-state entities located in the State where intra-state ABT has
not yet been implemented.
- Empowerment of SLDCs has been made technically and financially.
Inter-State ABT
Intra-State ABT
•ISGS: Inter State Generating Stations
•SGS: State Generating Stations
•CTU: Central Transmission Utility
•STU: State Transmission Utility
7/7/2015
POWERGRID
43
FURTHER IMPROVEMENT:
INTRA-STATE ABT
METERING
Open Access- Way Ahead…



A Power exchange facilitates equitable,
transparent and efficient trading of power.
Bridges the demand supply mismatch by
bringing larger players together for buying
and selling in an auction based system.
While maintaining complete anonymity,
resolves the constraints in the earlier formats,
Viz. search costs, asymmetric information,
transaction costs, and counter-party risks.
Open Access- Way Ahead…
“collective transaction” means a set of
transactions discovered in power exchange
Scheduling and open access for collective
transactions discovered in a power exchange
through anonymous simultaneous competitive
bidding by buyers and sellers, presently on
day-ahead basis.
Open Access- Way Ahead…





The ATC declaration is to be done by NLDC on its web
site every day.
Depending on the corridor availabilities the solution is
to be found out and the allowed trades will be
intimated to NLDC.
If there is no congestion NLDC will accept the trades
and issue the schedules to the power exchange and
the same will be implemented in RLDC schedules.
In Power Exchange transactions both buyer and seller
have to pay the Transmission and operating charges
separately.
The transmission losses also have to be borne by the
buyer and seller separately.
Typical Approvals- Captive Power Plants
Captive Power Plant
Eastern Region
Western Region
Southern Region
Quantum( MW)
NBVL(OPTCL)
27
SAIL-DSP(DVC)
20
TISCO(DVC)
60
Bhushan Steel
25
J.P Cement (Rewa)
5
Indo Rama synthetics
22
PSKL
10-30
Renuka Sugar
25
Vishwanath Sugar
7.5
Godavari Sugar
25
Ugar Sugar
25
Jindal Steel
200
Nav Bharat
50
NCS Sugar
13
Back
TYPICAL
STOA CASE
KAYAMKULAM RGCCPP, NTPC to PSEB
150 MW for 31 days on Round the Clock basis
STOA OF KSEB(RGCCPP) - PSEB 0000 HRS – 2400 HRS
150MW AT RGCCPP EXBUS POINT for 31 days
PSEB
CUSTOMER:
NVVNL
TRADER:
NVVNL
INJECTING UTILITY
NR
HVDC BACK TO BACK AT
VINDHYACHAL IN WR
RGCCPP,KSEB
DRAWEE UTILITY
PSEB
INTERVENING REGION
WR
INTERVENING REGIONAL LINK
WR
HVDC BACK TO BACK AT
BHADRWATHI IN WR
SR-WR
WR-NR
INTERVENING STATE TRANSMISSION
UTILITY
KSEB
CAPACITY APPROVED
DAILY PERIOD
SR
150 MW
0000-2400 HRS
KAYAMKULAM RGCCPP NTPC)
STOA OF KSEB(RGCCPP) - PSEB 0000 HRS – 2400 HRS
150MW AT RGCCPP EXBUS POINT for 31 days
PSEB
NR
EXPORT AT RGCCPP BUS 150 MW
LOSSES IN KERALA
AT KERALA PERIPHERY
LOSSES IN SR
AT SR-WR PERIPHERY
LOSSES IN WR
AT WR-NR PERIPHERY
LOSSES IN NR
PSEB RECIEVES
HVDC BACK TO BACK AT
VINDHYACHAL IN WR
0.75%
148.9 MW
3.12%
WR
HVDC BACK TO BACK AT
BHADRWATHI IN WR
144.3 MW
4.0%
138.5 MW
SR
3.0%
134.4 MW
KAYAMKULAM RGCCPP(NTPC)
STOA OF KSEB(RGCCPP) - PSEB 0000 HRS – 2400 HRS
150MW AT RGCCPP EXBUS POINT for 31 days
Payments as per
Regulation 2004 of CERC
PSEB
APPLICATION PROCESSING FEE
NR
Rs 5000 PER TRANSACTION
HVDC BACK TO BACK AT
VINDHYACHAL IN WR
SCHEDULING CHARGES PER DAY
1. Rs 3000
FOR SRLDC
2. Rs 3000
FOR WRLDC
3. Rs 3000
FOR NRLDC
4. Rs 3000
FOR KSEB
WR
HVDC BACK TO BACK AT
BHADRWATHI IN WR
TRANSMISSION CHARGES PER MW PER DAY
1. Rs 700.91
FOR CTU-SR
2. Rs 881.49
FOR SR-WR LINK
3. Rs 339.98
FOR CTU-WR
4. Rs 233.32
FOR WR-NR LINK
TOTAL
TRANSMISSION
CHARGES PER
5. Rs 649.86
FOR CTU-NR
UNIT 15.12Ps
6. Rs 672.07
FOR KSEB
SR
KAYAMKULAM RGCCPP(NTPC)
STOA OF KSEB(RGCCPP) - PSEB 0000 HRS – 2400 HRS
150MW AT RGCCPP EXBUS POINT for 31 days
Payments as per
Regulation 2004 Amendment 2005) of CERC
PSEB
APPLICATION PROCESSING FEE
NR
Rs 5000 PER TRANSACTION
HVDC BACK TO BACK AT
VINDHYACHAL IN WR
SCHEDULING CHARGES PER DAY
1. Rs 3000
FOR SRLDC
2. Rs 3000
FOR WRLDC
3. Rs 3000
FOR NRLDC
4. Rs 1000
FOR KSEB
WR
HVDC BACK TO BACK AT
BHADRWATHI IN WR
TRANSMISSION CHARGES PER MW PER DAY
1. Rs 843
FOR CTU-SR
2. Rs 1311
FOR SR-WR LINK
3. Rs 357
FOR CTU-WR
4. Rs 600
FOR WR-NR LINK
TOTAL
TRANSMISSION
CHARGES PER
5. Rs 594
FOR CTU-NR
UNIT 18.5Ps
6. Rs 672.07
FOR KSEB
SR
KAYAMKULAM RGCCPP(NTPC)
STOA OF KSEB(RGCCPP) - PSEB 0000 HRS – 2400 HRS
150MW AT RGCCPP EXBUS POINT for 31 days
Payments as per
Regulation 2008 of CERC
PSEB
NR
APPLICATION PROCESSING FEE
HVDC BACK TO BACK AT
VINDHYACHAL IN WR
Rs 5000 PER TRANSACTION
SCHEDULING CHARGES PER DAY
1. Rs 2000
FOR SRLDC
2. Rs 2000
FOR WRLDC
3. Rs 2000
FOR NRLDC
4. Rs 2000
FOR KSEB
WR
HVDC BACK TO BACK AT
BHADRWATHI IN WR
TRANSMISSION CHARGES PER MWHR
1. Rs 90
FOR Bilateral Wheeling
through one or more region
1. Rs 30
FOR KSEB
SR
TOTAL
TRANSMISSION
CHARGES PER
UNIT 12.2Ps
KAYAMKULAM RGCCPP(NTPC)
Comparison of CERC Regulations on Short-Term Open Access
(Regulation 2004, Amendment 2005 and Regulations 2008)
Old Regulations
(06.05.2004 to 31.03.2005)
Amended Regulations
(w.e.f. 01.04.2005 to
31.03.2008)
Regulations, 2008
(w.e.f. 01.04.2008)
Total STOA
Total STOA Charges Total STOA
Charges Paisa/Unit Paisa/Unit
Charges Paisa/Unit
15.12
18.5
12.2
Back
STOA OF NBVL(ORISSA) - APPCC (0000 – 2400 HRS)
50 MW AT INJECTION POINT FROM 01.03.08 to 31.03.08
EXPORT AT NBVL(ORISSA)
LOSSES IN OPTCL SYSTEM
AT ER PERIPHERY
50 MW
3%
48.50 MW
LOSSES IN ER
AT ER-SR PERIPHERY
LOSSES IN SR
APPCC RECEIVES
TOTAL LOSSES FOR
TRANSACTION
3%
47.05 MW
3.12%
45.58 MW
HVDC BACK TO BACK AT
GAZUWAKA IN SR
ORISSA
SR
CTU
4.42 MW
ER
ANDHRA
PRADESH
NBVL
NAVABHARAT(NBVL) (ORISSA)(ER)
to
APPCC (ANDHRA)(SR)
50 MW for 31 days on Round the Clock basis
Consent was not given by OPTCL by citing the
following Reasons
As per provision under chapter 4.11,10.5 of OGC Rule 2006
and order dated 29.10.2007 passed by Hon’ble OERC, the real
time data of the CGP,(M/s NBVL) is yet to be received at the
SLDC, Control Room.
In absence of real time data monitoring facility, SLDC cannot
comply the OGC provision under chapter 3.4(9) during
contingency condition.
Due to the above reasons the Request for Consent is not
accepted.
NAVABHARAT(NBVL) (ORISSA)(ER)
to
APPCC (ANDHRA)(SR)
50 MW for 31 days on Round the Clock basis
FROM IEGC CLUASE 4.10
4.10 Data and Communication Facilities Reliable and efficient speech
and data communication systems shall be provided to facilitate
necessary
communication
and
data
exchange,
and
supervision/control of the grid by the RLDC, under normal and
abnormal conditions. All agencies shall provide Systems to telemeter
power system parameter such as flow, voltage and status of
switches/transformer taps etc. in line with interface requirements and
other guideline made available to RLDC / SLDC. The associated
communication system to facilitate data flow up to RLDC/SLDC, as
the case may be, shall also be established by the concerned agency
as specified by CTU in connection agreement. All agencies in
coordination with CTU shall provide the required facilities at their
respective ends and RLDC / SLDC as specified in the connection
agreement.
NAVABHARAT(NBVL) (ORISSA)(ER)
to
APPCC (ANDHRA)(SR)
50 MW for 31 days on Round the Clock basis
Though the Parties have approached CERC, but
the open access transaction is not through.
Consent was not given by KPTCL by citing
the following Reasons
The Sugar companies started trading of the surplus
power by applying through open access .
But initially KPTCL has not consented by citing the
reason that the sugar companies are having PPA with
ESCOMs.
Later the Sugar companies have approached CERC and
CERC allowed them to trade under open access.
Aggreived by the order of CERC, KPTCL has approached
the Appellate Tribunal. The Tribunal stated that if any
petition is filed , the state commission shall consider the
same. But the existing open access arrangement to
continue.
Total Transfer Capability: TTC
Thermal Limit
Power
Flow
Voltage Limit
Stability Limit
Total Transfer Capability
Time
Total Transfer Capability is the minimum of the
Thermal Limit, Voltage Limit and the Stability Limit
Total & Available Transfer Capability
Reliability Margin (RM)
Long Term Open Access (LTOA)
TTC
ATC
Short Term Open Access (STOA)
ATC = TTC – RM
SKEWED LOAD-GENERATION PATTERN
ON 17.04.09
300
50
SR FREQUENCY
49.8
250
STOA FROM
‘NEW’ GRID
49.6
200
49.4
150
49.2
49
100
48.8
50
48.6
‘NEW’ GRID
FREQUENCY
0
48.4
00:00
23:00
22:00
21:00
20:00
19:00
18:00
17:00
16:00
15:00
14:00
13:00
12:00
11:00
10:00
09:00
08:00
07:00
06:00
05:00
04:00
03:00
02:00
01:00
48.2
00:00
-50