Largest sized hydro unit (180 MW at Chamera) in the country
Salient FeaturesNorthern Regional Power System
Welcome
Reforms Within The State, Trading And Other Issues
by
ALOK ROY
General Manager (NRLDC)
POWERGRID, New Delhi
Regional Grid
State - A
State - B
State - C
CS - 1 MPPCS - 2
RLDCCoordinates
Control Areas
SEB’s Grid
Discom - A
Discom - B
Discom - C
STATE IPP
CENTRALSHARE
STATE GENR.
SLDCCoordinatesDirects
Control Areas
TRADE
Trading
Consumer
Trading
G1 G2
SERCSERC
SLDC
SEB/STU
State Govt.
RLDC
RPC
CTU
CERCCERC
Central Govt. CEA
ISTS
ISGS
Load
L1 L2
Intra State System
IEGC to Operate on the periphery
X= - GL G
I E G C
Orissa Model
BC
G
G
G
G
G
D
RC
T
G : Genco BC : Bulk Consumer T : Transco RC : Retail Consumer D : Discom
BC
Recommended Model
D
NG
NG
OG
OG
OG
RC
OG : Old Genco BC : Bulk Consumer NG : New Genco RC : Retail Consumer D : Discom
How do you buy or sell a commodity
which can not be seen, counted in numbers, or measured in kg, litres or metres,
which can not be put in a container with a forwarding address, on a particular truck taking a particular route, but flows as per laws of physics,
which can not be stored, and whose availability and cost keep changing widely,
which intermingles with all other supplies in an inevitable pool, and can not have an owner’s name tag ?
There is another peculiarity: the buyer has no control over what the seller supplies, and the seller has no control over what the buyer draws from the pool, and the two may not match !
It is crucial to have mechanism for commercial handling of mismatches
1) Power trading has to be notional :
buyer to pay the agreed amount to the supplier for scheduled quantum of power.
2) Payment for variations from the schedule through a common mechanism, e.g. U.I.
TO AVOID DISPUTES
TRADER
GRID
10 MW 10 MW
8 MW
A B@ Rs. 2.00/ u @ Rs. 2.20/ u
AGREEMENTS
ACTUAL FLOW
12 MW
A B
TRADER
UI POOL A/C
UI for 2 MW
A B
Rs. 2.00/ u for 10 MW
Rs. 2.20/ u for 10 MW
PAYMENTS
UI for 2 MW
• An Example:Suppose TATA POWER want to sell 100 MW to Discom- A in Andhra Pradesh
STEPS :
1) TPC and Discom-A to agree on terms and conditions of sale
2) TPC to get the consent of MSEB and “no-objection” of MSERC
3) Discom-A to get the consent of APTransco and “no- objection” of APSERC
4) MSLDC and APSLDC to ascertain transmission adequacy, and agree to arrange necessary metering, scheduling, energy accounting and UI settlement
5) WRLDC and SRLDC to ascertain transmission adequacy in their regional transmission systems
6) All concerned to have a common understanding about treatment / sharing of transmission losses, and levy of transmission/ wheeling charges for the use of intra-State and inter-State systems
SCHEDULING,
METERING,
UI SETTLEMENT
AGREEMENT & PAYMENT FOR SCHEDULED QUANTUM
WRLDC
SRLDC
AP TRANSCO/APLDC
TATA POWER
DISCOM-A
MSEB /MSLDC
Nondiscriminatory provision for use of transmission line or distribution system or associated facilities with such line or system by any licensee or consumer or a person engaged in generation in accordance with the regulations specified by the Appropriate Commission.
Under sub-section (2) of Section 38, CTU is obliged to provide nondiscriminatory open access to its transmission system for use by
(i) any licensee or generating company on payment of transmission charges; or
(ii) any consumer as and when such open access is provided by the State Commission under sub-section (2) of Section 42, on payment of transmission charges and a surcharge thereon as may be specified by the Central Commission
“Open Access’ means
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”
