Maintenance Schedule of Power Transmission Equipment Considering Large-scale Renewable Energy Access

With the quick development of renewable energy, it is required to consider the guarantee of renewable energy delivery capacity in the compilation of maintenance schedule of high-voltage (500kV and above, and 220/330kV in part) power transmission equipment. For this purpose, a method to compile the maintenance schedule of power transmission equipment is given: calculate the wind curtailment according to the probability density function of equivalent load and the daily minimum power-on output, and take it as a goal of maintenance schedule optimization; give the time periods suitable to the maintenance of external channel equipment based on the characteristics of photovoltaic power and hydropower. Considering the operation safety of transmission section, a large power grid maintenance schedule model based on multi-constraints is established in this paper, and this model is solved by use of mixed integer programming, and the compilation of annual maintenance schedule of actual power grid is taken as an example for verification.