Distribution Network Fault Location Method Based on Improved Quantum Cuckoo Algorithm

Abstract

The invention provides a distribution network fault location method based on the improved quantum cuckoo algorithm. The distribution network fault location is modeled as a high-dimensional combination optimization, and the quantum double-chain code is used to represent the distribution network fault location section. The flight algorithm optimizes the update of the value of each dimension of the quantum cuckoo algorithm, and combines the differential evolution algorithm to mutate the quantum double-chain code, so as to solve the combined optimal solution of the fault location of the distribution network and obtain the optimal solution. The invention establishes the optimal objective function of the distribution network fault location model, uses the improved quantum cuckoo algorithm to optimize the calculation, identifies the fault section, and uses the distribution network calculation example to verify, and can process Fault location when multiple faults occur at the same time.

Description

technical field [0001] The invention belongs to the technical field of distribution networks, and in particular relates to a distribution network fault location method based on an improved quantum cuckoo algorithm. Background technique [0002] At present, distributed power generation has emerged, and the protection and control of power systems have become more and more complex. With the construction of intelligent substations and the introduction of various distribution automation devices, new protection and control methods emerge in an endless stream. After automatically tripping and isolating the permanent fault, the fault location algorithm is used to locate the fault section, and the fault processing is jointly processed by the switchgear of quick disconnection and isolation and the intelligent terminal control equipment with information transmission; based on three-stage current The traditional relay protection of protection is incapable of dealing with the complex net...

AI Technical Summary

Problems solved by technology

[0002] At present, distributed power generation has appeared, and the protection and control of power systems have become more and more complicated. With the construction of intelligent substations and the introduction of various distribution automation devices, new protection and control methods have emerged in an endless stream. The automatic reclosing device After automatically tripping and isolating the permanent fault, use the fault location algorithm to locate the fault section. The fault processing is jointly processed by the fast breaking and isolating switchgear and the intelligent terminal control device with information transmission; based on the three-stage current Due to its complex setting, the traditional relay protection of protection has limited protection range and is helpless when dealing with multi-switch complex networks

Using the distribution network topology method has a network logic protection based on peer-to-peer or master-slave communication network, which can quickly locate the fault section. This method is suitable for complex network structures, but in addition to manually inputting the network topology structure , it is also necessary to establish the action set, non-action set and backup set of vectors according to different types of switches. The method is more complicated. Because the linked list method uses the branch positioning method, it needs to cooperate with the secondary positioning, which is more complicated.

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