Digitalization Transformation of Power Transmission and Transformation Under the Background of New Power System

Due to the unique distribution characteristics of new energy in China, there is a low correlation between new-energy-rich areas and high load areas.Power grid enterprises can effectively alleviate the contradiction between supply and demand by increasing the construction of high-voltage power transmission and transformation projects and transmitting clean power generated by new energy to high load areas. Therefore, in order to ensure the reliable operation of the new power system with new energy as the main body and to improve the defect early-warning level of power transmission and transformation equipment, power grid enterprises urgently need the digitalization transformation of power transmission and transformation. Firstly, in this paper, the characteristics and development direction of the new power system with new energy as the main body and the digitalization transformation of power transmission and transformation are introduced. Then, the substation (converter station), overhead transmission line, cable tunnel, and gas-insulated transmission line (GIL) gallery, etc, are taken as examples to perform the digitalization analysis. Finally, the key technologies affecting the digitalization transformation of power transmission and transformation at this stage are discussed, namely, applying the accurate sensing technology of chip multi-physical quantity integration, the defect intelligent identification technology of multi-source spatio-temporal data coupling, and the state anomaly early-warning technology of high fidelity dynamic multi-dimensional digital twin. Moreover, the future prospects in digitalization transformation of power transmission and transformation are put forward. © 2022, High Voltage Engineering Editorial Department of CEPRI. All right reserved.