Net injection of Inter State Generating stations (ISGS)/BBMB
generating stations & net drawal of State Utilities using Special Energy
(i) The sign convention of
power flow recorded by meters is positive for flow out of bus-bar and negative
for power flow into the bus-bar. However, for meters on LV/HV side of Generator
Transformers, the meters have actually been connected so as to read positive for
power flow into the HV bus-bar.
(ii) Net injection/drawal at any
location is algebraic sum of meters (including sign) on all feeders/ICTs/GTs
listed with that location.
(iii) Net drawal of State
Utilities would be algebraic sum of drawals at all the locations listed for that
(iv) Multiplying factor to be
applied with standby meters is to compensate for transmission/transformation
losses & would depend upon voltage level (1.5 % for 400 kV, 3% for 220 kV
lines & 4% for 132 & below lines) as agreed by Commercial Committee of
NREB in its 105th meeting held on 08.03.2001.
(v) State Utilities would also
be required to send daily readings of the Existing Conventional Meter (ECM)
along with time of outages of some LV feeders listed with respective states to
NRLDC on a weekly basis. (SEMs on these feeder have not been installed in view
of negligible/ constant power flows).