Power System State Estimation Video Lecture - Electrical Engineering (EE)

hello everyone I am MD Ramon and I
welcome into my lecture series on power
system state estimation so what is the
status dimension state estimation is the
process of removing noise from the
measurements to monitor the power system
properly we collect measurements from
different parts of the system the
collective measurements contained noise
or error in state estimation we remove
these noise and we try to achieve the
actual values of the states in power
system the most prominent estimator is
the weighted least square estimator
which is also known as WL s estimator it
was invented by Edwin merula gender and
called friedrich gauss in between 1805
and 89 it can be mathematically proven
that it is the most efficient estimator
if your system contains Gaussian noise
it was proposed for power system by
fredtrip in 1970 and since then it is
used as the most popular estimator there
are two main types of weighted least
square estimator one works with the DC
or linear power for equations and other
words to the ACM nonlinear part flow
equations so they are called as DC or
linear state estimator and AC or non
linear state estimator so what are the
measurements we collect in power systems
for example this is RGB 14 bus system we
collect the real and reactive power
flows of the transmission line real and
reactive power injections of the bus the
voltage magnitude of the bus current
flows of the transmission lines and with
the newest pmu technology we can also
measure in the phase difference
directly in power systems we take the
voltage magnitudes of all bosses and
voltage angles of all buses as the state
variable if we know them we can
calculate all other variables easy like
the real and reactive power poles and
injections
they can be calculated directly if we
know these things so this these are
called the state variables that's all
for now thank you for watching