Simulation Study on Load Model Parameters for Stability Analysis of Central China Power Grid

Load model is one of the important factors effecting power system stability simulation. To research the accuracy of the load model and its parameters being adopted in the dispatching department of central China power grid to guide the load modeling scientifically, the equivalent impedances of distribution networks of central China power grid are calculated by power system analysis software package (PSASP). Simulation results show that there is a certain difference between the equivalent load model parameters being adopted and their practical values, and the factors, such as the structure of distribution network, its operating voltage and the approach to process the equivalent impedance and so on, effect the equivalence accuracy of load model. Using the equivalent load model parameters obtained from simulation, the measures being adopted currently to enhance voltage stability of power network can be simplified.