Automatic Modeling of Large Scale New Energy for the Electromagnetic Transient Grid-Connected Study of New Power System

In order to respond to the national clean development strategy, meet the growing demand for electricity, and build a clean, low-carbon, safe and efficient power system, the proportion of new energy units is increasing. Due to the reverse distribution of China's energy resource supply and power load demand, the establishment of large-scale new energy grid connection and the establishment of trans-regional power grid, conventional units are replaced by a large number of new energy units, making the stable operation characteristics of the power grid become more complex, and even affect the safe and stable operation of the power grid. In order to further study these problems, this paper develops automatic modeling software for large-scale power grid electromagnetic transient research to conduct electromagnetic transient for large-scale new energy access to the power grid State full-digital or number-analog hybrid simulation study. Compared with the traditional electromechanical transient simulation, the electromagnetic transient digital-analog hybrid simulation has the advantages of high accuracy and large simulation scale, and the complexity of power grid modeling, debugging and simulation analysis has been greatly improved. At the same time, this paper proposes a new energy automatic modeling technology, through the design of various types of new energy unit template, establish the corresponding new energy single multiplier model, in the actual application test, can complete the components of new energy units, new energy grid connection, voltage correction, tide calibration and other functions. This paper also designed a scheme to match the manufacturer model intelligently, and has a high modeling Efficiency and precision. At present, the new energy automatic modeling software has been successfully applied to the digital-analog hybrid real-time simulation research of the electromechanical transient data of several regional power grids. The conversion scale of the new energy units of a single set of electromechanical transient data has reached more than hundreds, and the overall modeling efficiency has been greatly improved, which has good research and application significance.