The Research Of Power System Load Model With Variable Structures

During the last decades, a series of blackouts relating to voltage problem have happened in the whole world. Voltage stability becomes the focus of power system studies. In voltage stability analysis, the importance of description of load is very outstanding. Practical load models that suitable for voltage stability analysis is need to be set up. This dissertation studies the variable structure characteristic of load, and offers corresponding modeling methods after analyzing the reason of changing load structure. After analyzing present static models, a new static model with variable structure is proposed and simulation data are utilized to carry out modeling. Proposed static model is added to the model library of simulation software Eurostag and validated by simulation test. ANFIS is utilized to construct dynamic load models with variable structures.