ABSTRACT
With the rapid development of power system, power
system structure and operation mode of the increasingly
complex, automation level of power system dispatching center
also development rapidly. Modern scheduling system
requirements can rapid, accurate and comprehensive grasp of
the actual operation of power system, run trend of forecast
and analysis system, to puts forward some measures for the
problems occurred in the operation of countermeasures and
provide the next run. Thus ensure the safety and economy of
power system operation.
At present, all levels of power grid automation system
have the function of power grid analyze. In the grid of
high-level application software, state estimation plays a very
important role; it can provide more abundant, accurate and
reasonable data, for other applications to provide reliable data.
The content of power system state estimation: network
topology analysis, network observability analysis, state
estimation, and trends in state estimation, bad data detection
and identification, etc.
In this paper, the state estimation algorithm are studied,
the state estimation of least squares method, and combined
with the case of the IEEE standard power system simulation
analysis, the calculation result more reasonable, show that the
program has a good practicability.
【Key words】electric power system; state estimation; least
squares method
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