Method for determining power system parallel load flow based on heuristic automatic network partitioning

Abstract

The invention relates to a method for determining a power system parallel load flow based on heuristic automatic network partitioning, which comprises the following steps: partitioning distribution network; generating the admittance matrixes of the partitioning nodes, the power flow calculation constant-jacobian matrix and the voltage-power sensitivity matrixes of virtual generators in partitions, sending the voltage-power sensitivity matrixes to a coordination layer; sending initial voltage magnitude and phase angle of virtual engines at the split points by the coordination layer; carrying out power flow calculation on the partitions, sending output power of the virtual engines to a coordination server; judging whether the boundary coordination quantity precision is met or not according to the mismatch quantity of the sum of output power of two virtual engines at the split points by the coordination layer, if no, correcting the voltage of the partitioning points, sending the corrected result to sub-areas, skipping to the last step, and otherwise, skipping to the next step; outputting the data result. The determining method has good convergence, high calculation speed, less memory occupied rate and calculation convenience and flexibility.

Description

technical field [0001] The invention relates to a method for determining power flow in a power system, in particular to a method for determining parallel power flow in a power system. Background technique [0002] The function of power system power flow calculation is to calculate the operating state of the entire system for a given operating condition and network structure, which belongs to the category of solving large-scale nonlinear equations. Classical solution methods include Newton's method, PQ decomposition method, forward-backward substitution method, etc. The main requirements of the power flow calculation algorithm are the convergence of the algorithm, the calculation speed, the memory usage rate, the convenience and flexibility of the calculation, etc. [0003] On the one hand, as the characteristics of strong nonlinearity and multi-components of modern power system become more and more prominent, its calculation volume and calculation complexity increase sharpl...

AI Technical Summary

Problems solved by technology

[0004] In view of the continuous expansion of power system scale and the continuous improvement of online analysis and control requirements, centralized algorithms are used to analyze and calculate large-scale power system power flow and optimal power flow problems often have problems of dimensionality disasters such as insufficient computer memory and slow convergence speed.

Images