Download - Restructuring of power grid
![Page 1: Restructuring of power grid](https://reader031.vdocuments.site/reader031/viewer/2022020218/55a671b91a28ab78208b45bd/html5/thumbnails/1.jpg)
RESTRUCTURING OF GRID
SARAVANAN SIVAMANI 1
![Page 2: Restructuring of power grid](https://reader031.vdocuments.site/reader031/viewer/2022020218/55a671b91a28ab78208b45bd/html5/thumbnails/2.jpg)
INTRODUCTION
• Power sector across the world is undergoing a lot of
restructuring; India is no exception to this.
• In some States of India there are multiple private
utilities, which are technically and financially in a
position to enter the phase of a competitive
electricity market.
SARAVANAN SIVAMANI 2
![Page 3: Restructuring of power grid](https://reader031.vdocuments.site/reader031/viewer/2022020218/55a671b91a28ab78208b45bd/html5/thumbnails/3.jpg)
What is a “Grid” ?
WHAT IS AN “INTER-CONNECTION” ?
WHY DO WE NEED THIS INTER-CONNECTION ?
1)Reliability
2)Economy
3)Proper Load Sharing
Two or more generating stations are interconnected by tie lines.
Interconnection provides the best use of power resources and
ensures greater security of supply.
An Interconnected power system covering a major portion of a
country’s territory (or state) is called a Grid. The different state grids
may be a interconnected through transmission lines to form a Grid.
SARAVANAN SIVAMANI 3
![Page 4: Restructuring of power grid](https://reader031.vdocuments.site/reader031/viewer/2022020218/55a671b91a28ab78208b45bd/html5/thumbnails/4.jpg)
All Power-Grid equipments used
Lightning Arrestor Power Transformer
Current Transformer/Potential Transformer
SARAVANAN SIVAMANI 4
![Page 5: Restructuring of power grid](https://reader031.vdocuments.site/reader031/viewer/2022020218/55a671b91a28ab78208b45bd/html5/thumbnails/5.jpg)
Circuit Breakers Insulators Isolators
Wave Trap
SARAVANAN SIVAMANI 5
![Page 6: Restructuring of power grid](https://reader031.vdocuments.site/reader031/viewer/2022020218/55a671b91a28ab78208b45bd/html5/thumbnails/6.jpg)
NEED FOR RESTRUCTURING
• The need for restructuring the power sector was felt
due to the scarcity of financial resources available
with Central and State Governments.
• Necessity of improving the technical and commercial
efficiency.
SARAVANAN SIVAMANI 6
![Page 7: Restructuring of power grid](https://reader031.vdocuments.site/reader031/viewer/2022020218/55a671b91a28ab78208b45bd/html5/thumbnails/7.jpg)
PROPOSED MODEL FOR
RESTRUCTURING IN INDIA
• In many parts of the world wherever unbundling, i.e.
separation of generation, transmission and
distribution has taken place, the two models are more
prevalent for system operation.
• Independent System Operator (ISO) model
• Transmission System Operator (TSO) model.
SARAVANAN SIVAMANI 7
![Page 8: Restructuring of power grid](https://reader031.vdocuments.site/reader031/viewer/2022020218/55a671b91a28ab78208b45bd/html5/thumbnails/8.jpg)
ISO AND TSO MODELS
• . In ISO model, transmission companies are also permitted to own, manage and control generation and distribution companies, an independent system operator is created to facilitate open access and competitive markets.
• In TSO model, operation of the grid and ownership of the grid are integrated in a single entity, which is responsible for development of transmission system and to provide non-discriminatory open access to all eligible market participants.
SARAVANAN SIVAMANI 8
![Page 9: Restructuring of power grid](https://reader031.vdocuments.site/reader031/viewer/2022020218/55a671b91a28ab78208b45bd/html5/thumbnails/9.jpg)
TO BE CONTINUED….
• TSO model seems to be most suitable for future
restructured electricity market in India.
• This is because the government owned transmission
company is merely responsible to provide non-
discriminatory open access.
SARAVANAN SIVAMANI 9
![Page 10: Restructuring of power grid](https://reader031.vdocuments.site/reader031/viewer/2022020218/55a671b91a28ab78208b45bd/html5/thumbnails/10.jpg)
ELECTRICITY ACT 2003
• This act consolidates all the existing laws and
introduces provisions with respect to new developments in the sector. It focuses on
creating competition, protecting consumer interests, rationalizing tariff, etc.
• All the necessary powers including issue of licenses are given to the regulators which
are made independent entities from the government.
SARAVANAN SIVAMANI 100
![Page 11: Restructuring of power grid](https://reader031.vdocuments.site/reader031/viewer/2022020218/55a671b91a28ab78208b45bd/html5/thumbnails/11.jpg)
SARAVANAN SIVAMANI 111
![Page 12: Restructuring of power grid](https://reader031.vdocuments.site/reader031/viewer/2022020218/55a671b91a28ab78208b45bd/html5/thumbnails/12.jpg)
SALIENT FEATURES
• Open access in transmission with provision of surcharge for cross subsidy and this surcharge
will be gradually phased out.
• Distribution licensees are free to undertake generation and generating companies are free to take up distribution licensees.
• For rural and remote areas stand alone systems for generation and distribution would be permitted.
• State Governments can convert State Electricity Boards (SEBs) into companies or continue them as distribution licensees.
SARAVANAN SIVAMANI 122
![Page 13: Restructuring of power grid](https://reader031.vdocuments.site/reader031/viewer/2022020218/55a671b91a28ab78208b45bd/html5/thumbnails/13.jpg)
CENTRAL AUTHORITY SYSTEM
SARAVANAN SIVAMANI 13
COORDINATE WITH
OTHER
SYSNCHRONOUS GRIDS
(EX NR, ER,NER)
REGIONAL (SYNCHRONOUS GRID)
LOAD DESPATCH CENTRE
STATE LOAD
DESPATCH
CENTRES
CENTRALLY
OWNED LINESCENTRALLY
OWNED PLANTS
INTER-STATE TIE
LINES
STATE OWNED
HVDC LINESDISTRIBUTION
SUBSTATION
POWERPLANT
OPERATORS
![Page 14: Restructuring of power grid](https://reader031.vdocuments.site/reader031/viewer/2022020218/55a671b91a28ab78208b45bd/html5/thumbnails/14.jpg)
GENERATION OF ELECTRICITY• The generating company should establish, operate and
maintain generating stations, tie-lines, substations and dedicated transmission lines.
• According to the 16th Electric Power survey conducted by CEA, the country has energy shortage of 7.8 % and peaking shortage of 13 % (100GW).
• As per the reports published by Oxford Institute for Energy Studies (OIES) [6] the Indian Government should do more to encourage and facilitate local private investment in small-scale distributed electricity generation capacity.
SARAVANAN SIVAMANI 144
![Page 15: Restructuring of power grid](https://reader031.vdocuments.site/reader031/viewer/2022020218/55a671b91a28ab78208b45bd/html5/thumbnails/15.jpg)
Central Authority System (contd.)
•The Central Electricity Authority of India (CEA) is a
statutory organisation constituted under section 3(1) of
Electricity Supply Act 1948
•To develop a sound adequate and uniform national power
policy, formulate short-term and perspective plans for power
development and co-ordinate the activities of planning
agencies in relation to the control and utilisation of national
power resources.
•To collect and record the data concerning generation,
distribution and utilisation of power and carry out studies
relating to cost, efficiency, losses, benefits and such like
matters.
SARAVANAN SIVAMANI 155
![Page 16: Restructuring of power grid](https://reader031.vdocuments.site/reader031/viewer/2022020218/55a671b91a28ab78208b45bd/html5/thumbnails/16.jpg)
What is a National load Dispatch Centre ?
The main functions assigned to NLDC are:
• Supervision Over the Regional Load Dispatch Centers.
• Scheduling and dispatch of electricity over the inter-regional
links in accordance with grid standards specified by the
authority and grid code specified by Central Commission in
coordination with Regional Load Dispatch Centers.
• Coordination with Regional Load Dispatch Centers for
achieving maximum economy and efficiency in the operation
of National Grid.
• Monitoring of operations and grid security of the National
Grid.
• Coordination for restoration of synchronous operation of
national grid with Regional Load Despatch Centres.
SARAVANAN SIVAMANI 166
![Page 17: Restructuring of power grid](https://reader031.vdocuments.site/reader031/viewer/2022020218/55a671b91a28ab78208b45bd/html5/thumbnails/17.jpg)
Sharing Of Transmission Charges
WHEELING CHARGES:
•Wheeling is the transportation of electric power (megawatts
or megavolt-amperes) over transmission lines.
•An entity that generates power does not have to own power transmission lines•The entity then pays the owner of the transmission line based on how much power is being moved and how congested the line is.
•Charges for inter-regional lines may be shared by twocontiguous regions on 50 : 50 basis.•Charges for the regional assets may be shared by the regionalbeneficiaries•If an inter regional asset is used for wheeling by a third partythe balance transmission charges may be shared by thebeneficiaries of the contiguous region on 50 : 50 basis.
SARAVANAN SIVAMANI 177
![Page 18: Restructuring of power grid](https://reader031.vdocuments.site/reader031/viewer/2022020218/55a671b91a28ab78208b45bd/html5/thumbnails/18.jpg)
Ownership and Coordination
• Inter-State and other transmission links may be owned by other independent entity (Ex: PGCIL).
• State Electricity Boards can Import or Export a pre decided amount of power from neighboring states or generators owned by other entities like National Thermal Power Corporation.
• State Electricity Boards are divided into
1) Generation companies (GENCOs)
2) Distribution Companies (DISCOs)
3) Transmission Companies(TRANSCOs)
• Overall coordination is done by a Load Dispatch Centre.
SARAVANAN SIVAMANI 188
![Page 19: Restructuring of power grid](https://reader031.vdocuments.site/reader031/viewer/2022020218/55a671b91a28ab78208b45bd/html5/thumbnails/19.jpg)
TRANSCOs:
DISCOS:
GENCOS:
The companies which are responsible for power generation are
called as Generation Companies(GENCOs) ex: NTPC
The companies which are responsible for transmission of large
amounts of power are called as Transmission
companies(TRANSCOs) Ex: PowerGrid
The companies which are responsible for Distribution of the
large amounts of power to the general public are called as
Distribution Companies(DISCOs) Ex: UP-RVVNL
SARAVANAN SIVAMANI 199
![Page 20: Restructuring of power grid](https://reader031.vdocuments.site/reader031/viewer/2022020218/55a671b91a28ab78208b45bd/html5/thumbnails/20.jpg)
Transmission of Electricity
• The RLDC will work as per the Indian Electricity Grid Code (IEGC) to ensure integrated operation of the power system in the concerned regions.
• It has to monitor grid operations, keep accounts of
the quantity of electricity transmitted through the regional grids, exercise supervision and control over the Intra-State transmission.
• It will be responsible for carrying out real time operations for grid control and dispatch of electricity within the state through secure and economic operation of the state grid in accordance with grid standards and the state grid code.
SARAVANAN SIVAMANI 20
![Page 21: Restructuring of power grid](https://reader031.vdocuments.site/reader031/viewer/2022020218/55a671b91a28ab78208b45bd/html5/thumbnails/21.jpg)
Distribution of Electricity
• State Commission permits a consumer or class of consumers to receive supply of electricity from a person other than the distribution licensee of his area of supply, such consumer shall be liable to pay an additional surcharge on the charges of wheeling, as may be specified by the State Commission, to meet the fixed cost of such distribution licensee arising out of his obligation to supply.
• Distribution companies have been given mandate for achieving complete metering within two years from the enactment of the law.
SARAVANAN SIVAMANI 21
![Page 22: Restructuring of power grid](https://reader031.vdocuments.site/reader031/viewer/2022020218/55a671b91a28ab78208b45bd/html5/thumbnails/22.jpg)
Different grids of India
SARAVANAN SIVAMANI 22
![Page 23: Restructuring of power grid](https://reader031.vdocuments.site/reader031/viewer/2022020218/55a671b91a28ab78208b45bd/html5/thumbnails/23.jpg)
Some Landmark Events Of Power Grid
• 1948 - Growth of supply systems
• 1962- First 220KV Voltage level
• 1967- Interconnection Of state Grids to form
Regional Grids
• 1975- First 400Kv Voltage level
• 1989- HVDC Back to Back
• 1998- Installation of 765 Kv line(Charged at 400Kv)
• 2006- Synchronisation of NR with ER-NER-WR
• 2007- Transmission at 765 Kv
• 2010/11- Installation of 800Kv HVDC Bi-pole Line
SARAVANAN SIVAMANI 23
![Page 24: Restructuring of power grid](https://reader031.vdocuments.site/reader031/viewer/2022020218/55a671b91a28ab78208b45bd/html5/thumbnails/24.jpg)
Thank You…
SARAVANAN SIVAMANI 24