Optimal Placement of a Defined Number of Phasor Measurement Units in Power Systems

Author:
, , , , ,
Year
: 2012
Abstract: Abstract—Nowadays, in real power systems in most countries

around the world, common measurement units and SCADA

systems are used for data measurement and state estimation.

Some Electricity Companies have installed and applied Phasor

Measurement Units (PMUs) for system observability.

Nevertheless, number of Phasor Measurement Units might be

limited due to financial considerations and this limited number

may be used together with common measuring systems. Thus,

this paper provides a novel method for optimal placement of a

limited number of phasor measurement units. Two main problem

are discussed in this paper: one is placement of a limited number

of phasor measurement units in case the units are less than the

minimum number required for the system to be observable, and

the other is placement of phasor measurement units in case the

units are more than the minimum number required for the

system to be observable. The first scheme takes into account the

system observability in presence of Phasor Measurement Units,

minimizing state estimation error and considering future

supplementary plan, and also determining candidate buses for

installing PMUs in future. While, the second one, takes into

account maximizing measuring system reliability with an

increase in redundancy of these measurement units and also

determining candidate buses for installing PMUs in future. The

proposed method has been simulated and analyzed on the IEEE

standard 14 bus test system and the results show the efficiency of

the method.
Keyword(s): Placement,State Estimation,Observability,PMU,

SCADA
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