Distribution network fault location method based on improved quantum cuckoo algorithm

A technology of distribution network fault and locating method, applied in the field of distribution network, can solve the problems of complex method, complex setting, complex power system protection and control, etc.

Active Publication Date: 2019-09-20
XIHUA UNIV
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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 rela...

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  • Distribution network fault location method based on improved quantum cuckoo algorithm
  • Distribution network fault location method based on improved quantum cuckoo algorithm
  • Distribution network fault location method based on improved quantum cuckoo algorithm

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Embodiment Construction

[0083] The specific technical solutions of the present invention are described in conjunction with the examples. The flow chart of the present invention is as figure 1 As shown, the S2.2 switching function a figure 2 Take a simple distribution network as an example.

[0084] For the following image 3 Each FTU of the power distribution network is numbered and divided into 33 sections by 33 switches.

[0085] Step1. First define the switch function and fitness function, initialize the quantum double-chain code, initialize the rotation angle and the maximum number of iterations. S1 generates a double-stranded code, S t =[S t 1 ,...,S t i ,...S t 33 ], S in the above formula t is the t-th generation double-strand code, S t i It is the code value of a certain bit in the double chain, and the upper chain is: [α 1 ,...α 33 ], the lower chain is: [β 1 ,...β 33 ].

[0086] Step2. Utilize coding to transform into a sequence that conforms to the operating state of t...

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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...

Claims

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Application Information

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IPC IPC(8): G01R31/08
CPCG01R31/088Y04S10/52
Inventor 黄小莉谢振宇王丹潘南希胡思宇陈静娴郑永康
Owner XIHUA UNIV
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