A Method Based on Weighted Least Squares for Estimating Voltage of Distribution Network System Integrated with Distributed Generations Using Remote Measurement Data
Voltage quality of a distribution network system is one of the most important issues. To evaluate the voltage in real-time, this paper proposes a method of voltage estimation in distribution network systems which are integrated with distributed generations (DGs). In the proposed method, the weighted least squares (WLS) method is used to optimize the objective function of the error measurement which is built by the network configuration, real-time and pseudo measurements at the main substation and DG buses. The proposed method is verified by simulation case studies of the 17-bus radial distribution network integrated with DGs including a solar power plant and two wind power plants. The simulation results in this work confirm that the proposed method is high accuracy for voltage estimation
