This project belongs to the technical field of operation and maintenance of ultra-high voltage power transmission and transformation facilities.
This project is a systematic study on the impact of natural environmental disasters on power transmission and transformation facilities and response measures. The purpose of the project is to improve the performance of power transmission and transformation facilities in resisting disastrous environmental conditions, achieve equipment status monitoring that combines online monitoring and meteorological and environmental risk warning, and improve the efficiency of the power grid in responding to disastrous climatic environments, so that power transmission and transformation facilities can be more reliable in the climate environment, the operation and maintenance goals are clearer, and the safety assessment of power grid dispatch is closer to the current status of equipment. The project research adopts the project group research method.
Research on line typhoon fault risk warning based on meteorological forecast and research on wind resistance of transmission lines were carried out for typhoon disasters; research on line risk warning based on lightning landing statistics in line corridors was carried out for lightning strikes; research on ice coating and tower anti-icing research and online monitoring of ice coating; research on line pollution flashover risk warning for pollution and research on external insulation anti-pollution technology for transmission and transformation equipment were carried out; In response to the earthquake disaster, earthquake resistance research on UHV transmission towers and electrical equipment in substations was carried out. The "Wire Ice Prediction and Ice Condition Monitoring and Warning System" and the "Transmission Line Fault Risk Early Warning System Based on Meteorological Environment" have been developed for transmission lines, and the three will be integrated into the final development and construction of the "East China Power Grid Power Transmission and Transformation Equipment Condition Monitoring System", realizing the application of disaster prevention technology for power transmission and transformation facilities that combines online monitoring and risk warning.
Completed the research on multi-parameter line virtual reality monitoring technology for the first time; completed data security access based on OPGW communication; completed the research on the wind-induced coupled vibration characteristics of the tower-line system based on wind tunnel tests, and discovered the wind load transmission path between the transmission tower and the conductor. and the dynamic damage mechanism caused by coupling internal resonance has formed technical measures for wind and ice reinforcement of towers, and developed buckling restraint supports with independent intellectual property rights; For the first time, the earthquake simulation experiment of real substation coupling equipment and the earthquake damage mechanism experiment of large transformers were completed, and the seismic design method and improvement suggestions were put forward; the wind load shielding effect between UHV eight-split conductors was discovered for the first time and the wind load was greatly reduced; For the first time, a grid-based high-resolution meteorological parameter transmission mechanism has been established. The algorithm model of the fault risk line set is given in advance based on regional grid wind speed and wind direction forecast data, and the calculation model of the line set based on ground lightning strike data is completed.
The research has obtained 6 invention patent authorizations, 6 utility model patent authorizations, and 2 invention patent applications have been accepted. The project research has published 73 academic papers in important academic journals and conferences at home and abroad (including a total of 37 papers included in SCI and EI), and part of the content has been involved in the preparation of 2 monographs.
The research results have been applied to the operation and maintenance management of East China Power Grid's power transmission and transformation facilities and the safety assessment of power grid dispatch, ensuring the safety and reliability of East China Power Grid. The transmission line fault risk warning model based on meteorological environmental parameters developed in this project is of great significance for supporting the formulation of safety plans for power grid dispatch and guiding line operation maintenance and fault handling. At the same time, the research results of this project are also applied to the construction of UHV power grids and transformer manufacturing in my country. The conductor icing prediction and ice condition monitoring and warning system researched and developed by the project is a key part of the ice disaster prevention and control system. It can predict and monitor the ice condition of transmission line conductors in real time, and provide warnings according to the specific structure of the line, providing important technical means for the transmission line safe operation under ice and snow weather conditions. The research on wind and ice resistance technology for line towers, earthquake resistance research on substation equipment, and pollution flashover research on power transmission and transformation equipment carried out by the project are also important technical means to ensure safe transmission and power supply and maintain social stability. This project has a good role in promoting the construction of "green power grid, first-class enterprises, and harmonious society" and has considerable economic and social benefits. After acceptance by experts, the project has generally reached the international advanced level, and some results have reached the international leading level.