Alternating current/direct current distribution network distributed optimization method considering wind power uncertainty

Abstract

The invention discloses an alternating current / direct current distribution network distributed optimization method considering wind power uncertainty. Based on the natural partitioning properties of an alternating current / direct current distribution network, a typical alternating current / direct current hybrid distribution network structure and distributed optimization framework are established. Within each alternating current / direct current power grid sub-region, the 1-norm and the infinity-norm are considered at the same time to constrain the probability distribution of each wind power outputscene, and a data-driven two-stage distribution robust model is established. The model uses the electricity purchasing cost of a superior power grid, the electricity purchasing and selling cost of alternating current / direct current sub-regions, the wind abandonment cost, the power generation cost of a micro-turbine and the like as optimization goals, and uses the 1-norm and the infinity-norm to constrain the uncertainty of the probability distribution of the screened typical scene. The data-driven two-stage distribution robust model is established, and column and constraint generation algorithms are used to solve.

Description

technical field [0001] The invention relates to the field of distribution networks, in particular to a distributed optimization method for an AC / DC distribution network considering the uncertainty of wind power. Background technique [0002] The distribution network is composed of overhead lines, cables, towers, distribution transformers, isolating switches, reactive power compensators and some auxiliary facilities, etc., and plays an important role in distributing electric energy in the power network. The distribution network is classified according to the voltage level, which can be divided into high-voltage distribution network (35-110KV), medium-voltage distribution network (6-10KV, 20KV in Suzhou), and low-voltage distribution network (220 / 380V); In larger super-large cities, the 220KV power grid also has power distribution functions. Classified according to the function of the power supply area, it can be divided into urban distribution network, rural distribution net...

AI Technical Summary

Problems solved by technology

The diameter of the distribution line is smaller than that of the transmission line, resulting in a larger R / X of the distribution network

Due to the large R / X of the distribution line, it is difficult to guarantee the convergence of these algorithms commonly used in the transmission network in the power flow calculation of the distribution network.

Images