Alternating current and direct current system optimization power flow calculation method based on an interior point method

Abstract

The invention relates to the field of power flow optimization of alternating current and direct current hybrid power distribution networks, in particular to an alternating current and direct current system optimization power flow calculation method based on an interior point method, which comprises the following steps: step 1, calculating a composite objective function of network loss and voltage deviation of a power grid; 2, analyzing the AC / DC hybrid power distribution network according to the distribution network reactive power optimization basic model to obtain AC / DC hybrid power distribution network increase constraint information; and 3, performing target reactive power optimization on the power grid system by adopting an interior point method based on the composite target function of the network loss and the voltage deviation and the constraint information. The method has the following characteristics that a direct current system is added to a traditional alternating current system, the power flow optimization algorithm does not need a specific initial value, and the problem that it is difficult to find a feasible initial point for a large-scale actual problem is solved; and the technical effects of simplifying the calculation process and ensuring that the multi-dimensional actual problem can be reliably converged are achieved.

Description

technical field [0001] The invention relates to the field of power flow optimization of a large-scale AC-DC hybrid distribution network, in particular to a method for calculating the power flow optimization of an AC-DC system based on an interior point method. Background technique [0002] Compared with the AC transmission system, the DC transmission system has significant advantages in reducing the cost of line construction and reducing line loss. In addition, the DC system is more conducive to the integration of the distributed power generation system into the grid, and the DC distribution network has become an inevitable trend in the development of the future distribution network. AC-DC hybrid distribution network, as a transitional network in the process of developing DC distribution network, adds DC transmission to traditional AC transmission, which is conducive to improving power supply reliability and power quality, and is currently a hot spot in power research. [0...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides an AC / DC system optimization power flow calculation method based on the interior point method, which solves the technical problem that for large-scale practical problems, it is usually difficult to find a feasible initial point, and the traditional interior point method is difficult to reliably converge. The initial value solves the difficult problem of finding a feasible initial point for large-scale practical problems; it achieves the technical effect of simplifying the calculation process and ensuring reliable convergence of multi-dimensional practical problems

Images