Large-scale distribution network power flow analysis method based on ILUTP preprocessing parallel iteration method

Abstract

The invention discloses a large-scale distribution network power flow analysis method based on an ILUTP preprocessing parallel iteration method. The large-scale distribution network power flow analysis method relates to a power grid power flow analysis method. With the continuous scale expansion of a distribution network, the scale of a system of linear equations in the distribution network powerflow calculation process is expanded continuously, the system of linear equations occupies most of the time of the power flow calculation process, and the traditional direct methods such as an LU decomposition method have very low calculation efficiency. The large-scale distribution network power flow analysis method comprises two main steps including formation of a power distribution topologicalstructure and Newton-Raphson power flow calculation, wherein formation of the power distribution topological structure is implemented based on a loop current method; and the Newton-Raphson power flowcalculation process specifically comprises substeps of setting an iterative initial value, forming a Jacobian matrix, solving the system of linear equations, judging convergence and the like. The solution of the system of linear equations is implemented based on the ILUTP preprocessing parallel iteration method. The large-scale distribution network power flow analysis method can greatly increase the calculation efficiency, so as to adapt to the real-time requirement of large-scale distribution network power flow calculation.

Description

technical field [0001] The invention relates to a power flow analysis method of a power grid, in particular to a large-scale distribution network power flow analysis method based on an ILUTP preprocessing parallel iteration method. Background technique [0002] Distribution network power flow calculation is the basis of distribution network design and dispatching operation. With the continuous expansion of distribution network scale and the complexity of distribution network structure, the demand for upgrading distribution network power flow calculation technology is also increasing. Although the forward and backward method widely used at present is simple in operation, saves memory and has good convergence, it has weak loop processing ability, and the calculation is easy to diverge for the distribution network with many loops. The loop current method is another commonly used power flow calculation method for distribution networks, which can effectively deal with the ring ne...

AI Technical Summary

Problems solved by technology

Although the widely used forward and backward method is simple in operation, saves memory and has good convergence, the loop processing ability is weak, and the calculation of the distribution network with many loops is easy to diverge.

The loop current method is another commonly used power flow calculation method for distribution networks, which can effectively deal with the ring network, but the calculation process involves a large number of linear equations to solve. At present, traditional direct methods such as LU decomposition and QR decomposition are mainly used, and the calculation efficiency is low. Low, unable to meet the real-time computing needs of large-scale distribution network

Images