Optimal Allocation of Fire Extinguishing Equipment for a Power Grid Under Widespread Fire Disasters

Abstract

Widespread fire disasters always occur in several concentrated short periods. A large range of fire disasters can cause the tripping of dozens of transmission lines simultaneously, posing a serious threat to safe operation of the power grid. The degree of risk cannot be efficiently calculated, making it difficult to guide the optimization of the allocation of fire extinguishing equipment. This paper describes the development of a large wildfire disaster power grid fault fire extinguishing equipment optimal allocation method and a proposed fast calculation method of transmission line risk. The risk index is calculated for different regional power grids according to subareas. According to the grid risk, fire extinguishing equipment will be deployed in advance to address high-risk areas of the grid fire, fully exploiting the limited equipment fire extinguishing effectiveness. The proposed method is verified in the Hunan provincial power grid as a case study. The results show that the number of calculations can be reduced to $1.2\times 10^{3}$ for the case in which 20 transmission lines are threatened by fire disasters; using computer resources with 30 trillion operations per second, the calculation time is less than 5 min. This capability can provide scientific and efficient guidance for disaster treatment of the electric power grid.