Voltage Estimation In An Islanded Micro-Grid Using Transient State Estimation Technique

Power quality issues have become an essential research subject especially in micro-grids (MGs) due to the influence of intermittent renewable energy resources and linear and nonlinear local loads. MGs which operate in islanded mode are even more susceptible to disturbances. Hence, power quality measurement is necessary in islanded MGs. Due to the cost of measurements, few measurements will be installed in power networks. As a result, researchers focused on the concept of state estimation technique. In this paper, transient behavior of an islanded 400V AC-MG is investigated by utilizing transient state estimation (TSE) as a type of power quality state estimation (PQSE). Efficiency of TSE in an islanded AC-MG is investigated in order to identify the cause of voltage dip/sag and measure voltage at busbars of AC-MG. In addition, 10% measurement noise is considered in order to have more realistic estimation. The results illustrate that TSE has great performance in the test islanded AC-MG while measurement noise has been considered.