摘要：The paper is concerned with the problem of choice of the minimum number of smart meters to ensure either the observability of all state variables in distribution network or the observability of voltage magnitudes whose control is particularly important in the low voltage distribution networks with distributed generation.Currently only voltage magnitudes,active and reactive currents can be synchronized.It is shown that replacement of voltage phasor measurements with the measurements of voltage magnitudes alone makes it possible to provide observability of voltage magnitudes at all feeder nodes with the number of smart meters lower than the number of load nodes.
