department of power annual report 1991-92 - Ministry of Power

2.1 POWER GENERATION
2.2 HIGHLIGHTS
As a result of favourable monsoon, the generation targets
fixed for 1991-92 (upto December, 91) for Hydro, have
been exceeded during the period April, 1991 to
December, 1991. The Thermal generation was 2.7% less
than the programme. However, it was 11.8% more than
that of the corresponding period of last year. The Hydro
generation during this period was 11.5% more than the
programme and 4.4% more than that of last year.
The total energy generation in the country during 1990-91
was 264.231 BUs, showing an increase of 7.8% over the
generation in 1989-90. The increase in Thermal
generation during 1990-91 over the previous year was
4.4%. The Hydro generation registered an increase of
15.4% during 1990-91 over the last year because of
favourable monsoon.
For the year 1991-92, the generation target of 283.450
BUs has been fixed, comprising 211.700 BUs Thermal,
6.850 BUs. Nuclear and 64.900 BUs Hydro Power. This
envisaged an increase of about 7.2% over the generation
achieved during 1990-91.
During the period April, 1991 to December, 1991 the
Hydro generation was about 4.4% more than that of last
year. This was mainly due to favourable monsoon. The
Thermal generation was however 2.7% less than the
programme because of backing down due to low system
demand, delay in commissioning and stabilisation of
certain units and non availability of requisite quantity and
quality of coal. The total generation during this period
was 211.381 BUs which is 9.01% more than the
generation during the corresponding period of the
previous year. The actual generation during the period,
April 1991 to December, 1991, as compared with the
target is given below :-
(Figures in MU)
APRIL TO DECEMBER, 1991
Type of Programme Actual %age %age of the
Generation 1991 1991 of the Corresponding
programme period/
last year
Thermal 154738 150597 97.3 111.6
Nuclear 4593 3943 85.8 82.0
Hydro 50965 56841 111.5 104.4
Total 210296 211381 100.6 109.0
4
2.3 PLANT LOAD FACTOR OF THERMAL
STATIONS
Thermal capacity, at present consitutes abot 69% of the
total installed capacity, in the country, and contributes
about 72% of the total power generation. At the beginning
of the 6th Five Year Plan, the performance of the thermal
power stations was unsatisfactory with the plant load
factor of 44.3% only. To improve their performance, a
number of measures were taken to achieve the optimum
utilisation of the existing thermal units. At the beginning
of 7th Five Year Plan i.e., 1985-86, the PLF improved to
52.4% and further increased to 53.2% in 1986-87. During
1987-88, the PLF increased to 56.5% which was the
highest achieved in any year. During 1990-91 the PLF
was 53.80%. The decrease in PLF during 1990-91 over
the previous year was mainly due to favourable monsoon
and consequent reduction in demand, particularly in
agricultural sector, resulting in low thermal generation.
During the period April, 1991 to December, 1991 the PLF
has been 53.4%.
During the period April, 1991 to December, 1991, the
following State Electricity Board/Corporations achieved
PLF higher than the All-India average of 53.4%.