This paper identifies the data requirements for real-time monitoring a
nd control of distribution systems. It points out that in addition to
having supervisory control and data acquisition on switches and contro
l equipment, methods are needed to obtain an accurate estimation of da
ta needed for feeder automation functions. A meter placement method is
proposed for this purpose It is shown that the measurements from such
a metering scheme can be used with a state estimator to provide the r
eal-time data needed for real-time monitoring of distribution system.