Kerala State Electricity Board
Transmission
The
Kerala power system consists of 17 hydel stations including
2 captive power plants 2 thermal stations, 3 IPPs, 5 major
inter-state transmission lines, one 400 KV sub-section,
and II Nos. 220 KV substations with the interconnecting
grid. The main grid is in 220 KV system. The energy requirement
for the year is estimated to be 13,000mu. Out of this about
6,200mu is expected from hydel sources, 3,500mu from central
generating stations, 2,500mu from the IPPs and the balance
from the remaining sources. The present peak load demand
is about 2300MW and is expected to increase up to 2,500
MW during March/April next year. We have a storage capacity
of 3843mu and the present storage is about 72% of the full
capacity.
Load
Dispatch Centre
The
Load Dispatch Station is situated at Kalamassery. Real-time
data from the generating stations and sub-stations are obtained
in the Load Dispatch Station through Power Line Carrier
Communication Network (PLCC). Depending on the load condition,
generators in various power stations are synchronized and
loaded to meet the varying load requirements. Shift-engineers
in the control room of load dispatch station regulate the
power generation as well as import as per the real-time
demand. This is carried out with the aid of computerized
Supervisory Control and Data Acquisition System (SCADA).
The state LD is connected to the Southern Regional Load
Dispatch Centre at Bangalore. The central share and drawal
is regulated by the SRLDC at Bangalore, Water availability,
inflow, consumption, demand etc. are daily collected and
monitored in the Load Dispatch Station. Generation schedule
for the day and long term planning of generation is carried
out based on these details collected in the LD center. Deputy
Chief Engineer in-charge of Load Dispatch Station Co-ordinates
all these activities. All details for the monthly Load Generation
Generation Balance (LGB), operation co-ordination with SREB,
inter-state energy transactions, etc. are handled by this
wing.
The
Unified Load Dispatch and Communication Scheme is implemented
in the state also as part of the National Policy for Unified
Load Dispatching, and the formation of a National Grid and
a National Load Dispatch Station. The implementation works
for the entire Southern Region is coordinated by PGCIL.,
KSEB is providing the infrastructure facilities for the
implementation of the scheme. The works are nearing completion
and the new LD set up in Kerala is expected to become operational
during this financial year itself.
As
per the scheme three sub load dispatch centers will become
operational at Thiruvananthapuram, Kalamassery and Kannur
in addition to the State LD Station at Kalamassery. Data
from 30 important stations (RTU) are being collected for
real time load dispatch activities. These stations include
all major generating stations, all 220kV substations and
major 110KV stations.
The Load
Dispatch Station is supported technically by the communication
wing and protection wing. The communication wing is responsible
for the upkeep of all communication networks, the SCADA
system and the associated software for Energy Management.
The Protection Wing, more popularly known the Relay Wing,
is responsible for ensuring selectivity and sensitivity
to fault clearance in the grid to achieve stability of the
power system.
Communication
System
For
ensuring effective and secured communication, KSEB is maintaining
its own communication network. Earlier, the communication
was predominantly through PLCC. Now, a microwave link is
established from Thiruvananthapuram to Kalamassery and an
optical fibre link is established from Kalamassery to Kannur.
There are 10 nodal stations in this broadband communication
network and the remote stations are hooked on to this network
through PLCC. The broadband network is connected to the
Regional LD Centre, Bangalore through the FO link from Madakathara
through the 400KV interstate lines. The final integration
works are in progress now. The microwave part is done by
Alstom, optical fibre part by Pirelli and the SCADA and
EMS are supplied by GE - Harris.
At
present, the Sub LD Stations are proposed to be manned in
two shifts. The State LD Station will be manned in all the
three shifts. With the commissioning of the ULDC Scheme,
the Load Dispatch Activities in the State level, regional
level and in the National level can be better coordinated
resulting in better stability of the Grid
Plans
for future
Modernisation
of the Load Dispatch is a continuing program so as to cater
to the additions in the generation as well as to manage
the power system to meet the demand for power. The typical
additional works include acquisition of data from the new
generating stations or grid stations as and when they are
commissioned, acquisition of energy meter readings and real
time control of the general at major power stations when
the availability based tariff structure (ABT) is implemented
etc.
With
the expansion of the power system, the traffic in the communication
network increases, and it is necessary to replace the PLCC
network with media supporting more bandwidth. A broadband
communication network is already established from Kannur
to Thiruvananthapuram. Additional broadband network is required
in the grid to connect major stations lying away from this
network. This additional network is being planned in such
a way that the computerization and networking of all the
offices of KSEB is also facilitated. The work is proposed
in the 10th Five Year Plan. The spare capacity in the broadband
network can be utilized to provide the communication infrastructure
for commercial telecom operation. Discussions are also being
held with the ER& DC, Thiruvananthapuram for providing communication
facility for the networking the various offices of the Govt.
of Kerala on a commercial basis.
This
not only has enough capacity to meet all our requirements
of internal communication now carried out through PLCC,
but also provides ample spare capacity to lease out to private
telecom operators,. We have already signed an MOU with PGCL
who has got licence as a National Telecom Operator for a
joint venture to lease out the spare capacity in the wide-band
for a nation wide telecom operation. This wide-band has
also enough capacity to meet our future requirements such
as video conferencing, wide-area networking for the computers
installed in KSEB (Intra Net), facility for Internet Services
(ISP) etc.
Transmission system over the decades
| Transmission Lines (Circuit
Kms |
1960 |
1970 |
1980 |
1990 |
2000 |
2001 |
| 400KV |
0 |
0 |
0 |
0 |
0 |
0 |
| 220KV |
0 |
317 |
854 |
981 |
2056 |
2216 |
| 110KV |
527 |
1350 |
1545 |
2297 |
2870 |
2990 |
| 66KV |
1373 |
1711 |
2005 |
2482 |
2674 |
2490 |
| No.of EHT Sub Stations |
22 |
59 |
86 |
130 |
178 |
182 |
| Step Down Transformer Capacity
MVA |
201 |
1219 |
2832 |
4174 |
9363 |
9921 |
Plans
for the future
no. of stations
|
|
Short Term Plan (20001-2002) |
Mid Term Plan(2002-2003) |
Long Term Plan (2003-2007 |
| 220KV |
5 |
7 |
5 |
| 110 KV |
42 |
48 |
32 |
| 66 KV |
8 |
8 |
- |
| 33 KV |
29 |
98 |
- |
| Total |
84 |
161 |
37 |
For
more details visit
www.kseboard.com
