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Photovoltaic system cascading failure sequence identification method and system

A technology of cascading faults and photovoltaic systems, applied in the direction of instruments, data processing applications, AC network circuits, etc., can solve problems such as analysis

Pending Publication Date: 2022-06-21
XIAN THERMAL POWER RES INST CO LTD
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Problems solved by technology

[0003] The above methods are all based on the construction of corresponding indicators from the aspects of system topology and power flow operation to analyze the cascading fault sequence of the power system. Cascading fault sequence search for photovoltaic systems

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  • Photovoltaic system cascading failure sequence identification method and system
  • Photovoltaic system cascading failure sequence identification method and system
  • Photovoltaic system cascading failure sequence identification method and system

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[0048] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0049] In the description of the present invention, it is to be understood that the terms "comprising" and "comprising" indicate the presence of the described features, integers, steps, operations, elements and / or components, but do not exclude one or more other features, The existence or addition of a whole, step, operation, element, component, and / or a collection thereof.

[0050] It should also be understood that the terminology used in t...

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Abstract

The invention discloses a method and a system for identifying a cascading failure sequence of a photovoltaic system. The method comprises the following steps: selecting a key line as an initial failure of the cascading failure sequence according to expert experience; constructing a link prediction index, a weighted power flow entropy index and a photoelectric weighted fluctuation entropy index from the perspective of a local topological structure, a power flow operation condition and a photovoltaic power generation influence condition; constructing a game model of a non-cooperative relationship according to the link prediction index, the weighted power flow entropy index and the photoelectric weighted fluctuation entropy index, determining weights of the link prediction index, the weighted power flow entropy index and the photoelectric weighted fluctuation entropy index, and obtaining a cascading failure sequence comprehensive index of the photovoltaic system according to the weights. And determining a condition for ending the cascading failure sequence prediction of the photovoltaic system in combination with the initial failure, and completing the identification of the cascading failure sequence of the photovoltaic system when the system is split or the cascading failure sequence reaches the maximum. According to the method, the comprehensive indexes are established through the non-cooperative game theory, and the cascading failure sequence of the photovoltaic system can be predicted more comprehensively.

Description

technical field [0001] The invention belongs to the technical field of safe operation of power systems, and in particular relates to a method and system for identifying cascading failure sequences of photovoltaic systems. Background technique [0002] At present, most of the research on the cascading failure simulation model is aimed at the traditional power system, and there are few models considering the photovoltaic power generation system. Applicable to photovoltaic power generation system has a certain one-sidedness. The existing method is to partition the system by algorithm according to the topological characteristics of the system structure, and then construct the shock vulnerability index and the specific vulnerability index in terms of line vulnerability to search for cascading failure sequences; or add comprehensive vulnerability to the dynamic power flow method. degree indicators, forming a cascading failure mode search method, etc. [0003] The above methods a...

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Application Information

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IPC IPC(8): G06Q10/06G06Q10/00G06Q50/06H02J3/06
CPCG06Q10/06393G06Q10/20G06Q50/06H02J3/06H02J2203/10H02J2203/20
Inventor 程文姬杨博吴琼赵磊牛凯王淑娟郗航刘增博康英
Owner XIAN THERMAL POWER RES INST CO LTD
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