Method and device for monitoring and analyzing line loss of power grid

The invention relates to a method and a device for monitoring and analyzing the line loss of a power grid. The method comprises the following steps of: establishing a power grid model parameter library through a series of analysis methods; acquiring real-time data, gateway meter data and meteorological data such as temperature data, humidity data and the like, storing in a database, and calculating actual line loss and theoretical line loss; calculating the tidal current of the power grid by using a Newton Raphson algorithm, and calculating the power loss of the power grid so as to calculate the theoretical line loss of the power grid; analyzing and comparing the line loss, searching error reasons and making analysis suggestions; and obtaining a result and ensuring the real-time property of the data. By comparing and analyzing a theoretical calculated value and an actual test calculated value of the line loss, an association relationship between the line loss of the power grid and factors such as a grid structure, the tidal current of the power grid, meteorological factors and the like is searched, the error reasons of the line loss are analyzed, the statistical calculation and analysis of the line loss of the power grid are guided, and scientific evidences are provided for making and performing loss reducing measures.