Distribution network fault location method based on improved quantum cuckoo algorithm

Abstract

The invention provides a distribution network fault location method based on an improved quantum cuckoo algorithm. Distribution network fault location is modeled into high-dimensional combination optimization; a distribution network fault location section is expressed by using a quantum double-chain code; with an improved Levy flight algorithm, updating of a value of each dimension of a quantum cuckoo algorithm is optimized; and the quantum double-chain code is processed by variation by combining a differential evolution algorithm, so that an optimal solution to the distribution network fault location combination and an optimal solution is calculated. According to the invention, an optimized objective function of the distribution network fault location model is established; optimization calculation of the objective function is performed based on the improved quantum cuckoo algorithm; a fault section is identified; and verification is performed by using a distribution network example. Moreover, fault point location under the condition of multi-point simultaneous fault occurrence can be processed.

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 appeared, 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 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 prote...

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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