Layered positioning method for fault section of distributed photovoltaic power distribution network

Abstract

The invention relates to a layered positioning method for a fault section of a power distribution network containing distributed photovoltaic power. The layered positioning method comprises the following steps: layering a topological structure of the power distribution network; encoding the fault current information and the section information of the hierarchical model; establishing a switching function and an objective function containing a distributed photovoltaic power distribution network hierarchical model; carrying out fault two-port positioning by utilizing an improved binary particle swarm algorithm; and reading a fault two-port, and positioning a fault section by using an improved binary particle swarm algorithm. Compared with a binary particle swarm algorithm for solving single-layer fault section positioning, the method provided by the invention can obviously reduce the number of iterations during operation, has high fault tolerance for distortion switches, and is suitable for solving the problem of complex power distribution network fault section positioning.

Description

technical field [0001] The invention relates to a method for locating a fault section of a distribution network, in particular to a hierarchical location method for a fault section of a distribution network containing distributed photovoltaics. Background technique [0002] In recent years, with the rapid development of new distributed generators (DG) such as solar energy and wind energy, after DG is connected to the distribution network, the structure of the distribution network becomes more complicated, and the power flow is no longer from the original grid side. On the load side, when a fault occurs, the fault state information is quite different from that of the traditional distribution network, and the traditional fault location method is no longer applicable. Therefore, it is of great practical significance to study the location method of distribution network fault section containing DG, which can quickly and accurately locate the fault section. [0003] The distribut...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned technical problems, the present invention provides a hierarchical location method for fault sections in a distributed photovoltaic distribution network, which can solve the problem that the distribution network structure becomes more and more complicated, the node scale increases greatly, and single-layer fault section location exists. For problems with poor accuracy, provide a high-accuracy, hierarchical model-based fault section location method suitable for complex networks

Images