Impacts of the load and line inaccurate models on the voltage control problem of the MV distribution systems

摘要

The electric distribution systems are generally modelled in an inaccurate way since the exact model of their components is not practically available. The model inaccuracy creates errors in the calculations and can mislead the analyses into the wrong directions. In this regard, this paper studies impact of the model inaccuracy on the voltage control problem of the Medium Voltage (MV) distribution systems. Firstly, a Voltage Control Algorithm (VCA) is proposed which is subject to the inaccuracies associated with the load and line models. Then, Monte Carlo (MC) simulation are used to create a wide range of scenarios that covers the possible values that parameters of the model under study can take. These scenarios represent the uncertain nature of the model under study. Finally, the load flow calculations are performed considering the set-point obtained by the VCA and for each of the scenarios created by the MC tool. By evaluating all scenarios, impact of the model inaccuracy on the voltage control problem is obtained. If the system voltages are found to be within the permitted voltage range, it is concluded that the inaccuracy in the studied model will not create a voltage violation problem for the VCA.