Distribution network maintenance optimization method based on distributed photovoltaic

Abstract

The invention discloses a distribution network overhaul optimization method based on distributed photovoltaic, which comprises the following steps: S1, construction of an overhaul time optimization model; S2, Construction of load transfer path optimization model; S3, the solution of the model. The invention establishes a joint optimization model of equipment overhaul time and load transfer path considering a plurality of constraint conditions, and adopts an improved genetic algorithm to solve the problems of equipment overhaul time optimization and load transfer path optimization, so as to obtain the global optimization. Firstly, the maintenance time is optimized, and then the load affected by the maintenance is transferred to other feeder lines through the appropriate path through the optimization of load transfer path, so as to obtain the optimal maintenance plan. On the premise of ensuring the safe operation of the system, the power supply reliability of the system can be improved to the maximum extent, repeated power outages can be avoided, and the power outage losses of users and power supply enterprises can be reduced.

Description

technical field [0001] The invention relates to the technical field of power grid maintenance, in particular to a distribution network maintenance optimization method based on distributed photovoltaics. Background technique [0002] In recent years, with the intensive introduction of policies at all levels, distributed photovoltaic power has developed rapidly. A large number of distributed power sources are connected to the grid, so that the distribution network changes from a traditional radial single-ended network to a multi-terminal network interconnected between power sources and users. The power flow no longer flows unidirectionally from the busbar of the substation to each load. There may be distributed power sources operating in isolated islands in the region, causing reverse power transmission and becoming a new risk that threatens the safety of maintenance personnel. In addition, the connection of a large number of distributed power sources to the low-voltage distr...

AI Technical Summary

Problems solved by technology

A large number of distributed power sources are connected to the grid, so that the distribution network changes from a traditional radial single-ended network to a multi-terminal network interconnected between power sources and users. The power flow no longer flows unidirectionally from the busbar of the substation to each load. There may be distributed power sources operating in isolated islands in the area, causing reverse power transmission and becoming a new risk that threatens the safety of maintenance personnel

In addition, the connection of a large number of distributed power sources to the low-voltage distribution network will have a certain impact on the short-circuit current level of the distribution network, power quality, relay protection, automation device action, and system stability.

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