Error Analysis and Application of PMU in the Field of Power Grid Static Stability Calculation

The static stability calculation of power grid is an important basis for power grid operation and regulation. However, for a long time, the static stability calculation relies on offline data. With the access of a high proportion of new energy sources, the motion stability analysis theory represented by the extended equal area criterion(EEAC) is affected, and the difficulty of power Angle curve drawing and the relative motion analysis of the center of inertia of complementary clusters is intensified. At the same time, the existing DSA calculation is also difficult to thoroughly model the power electronic equipment, so it is necessary to use PMU data to achieve static and stable online calculation of power grid. In this paper, an online calculation method of static stability boundary based on PMU data is constructed, and the error of PMU data is discussed, and the influence of error on static stability calculation is simulated. Finally, it is given according to the actual field case. The results of static stability calculation meet the requirements of real power grid operation mode.