IMPACT OF THREE-PHASE PSEUDO-MEASUREMENT GENERATION FROM SMART METER DATA ON DISTRIBUTION GRID STATE ESTIMATION

This paper addresses the modelling of unknown power values, so-called pseudo-measurements, for the use in distribution grid state estimation. Historical load data from smart metering devices in private households a photovoltaic systems is analysed regarding phase distribution, reactive power and correlation betwee n different generators. Based on this, methods for ps eudomeasurement generation are developed and tested in combination with state estimation. Depending on the active power a corresponding value for the power fa ctor has been found that enables the modelling of reacti ve power by using lookup tables. The high correlation in relative PV feed-in can be represented by assumptio n of equal standardized power. The developed methods are validated by simulation on the basis of an electric distribution grid. It is shown that phase distribut ion in pseudo-measurements is of minor importance, while t he developed methods improve the quality of the distri bution system state estimation result.