Power system reliability assessment method

A power system and reliability technology, applied in the field of power system reliability assessment, can solve problems such as complex programming algorithms and redundant failure impact analysis, and achieve the effect of complete failure modes and improved efficiency

Active Publication Date: 2019-07-12
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

With the expansion of power system scale, fault impact analysis is very cumbersome, and each programming algorithm is also very complicated

Method used

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Embodiment Construction

[0046] The implementation steps of the present invention will be further described below in conjunction with the drawings and specific embodiments.

[0047] The implementation flow chart of this method is as follows figure 1 shown and specified as follows:

[0048] Step 1. Regional division of the power system

[0049]According to the characteristic that the power system uses switchgear for topology transformation, the power system is divided into independent areas. The zone consists of elements such as lines and transformers and does not contain switchgear inside. Treat each region as a node,

[0050] And denoted by Z; the switchgear is regarded as a branch, and denoted by S. The areas or nodes, switchgear or branches are collectively referred to as components, and the nodes containing power are defined as power nodes, and the nodes containing loads are defined as load nodes. Calculate the reliability parameters for each region, and label the power nodes and load nodes....

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Abstract

The invention discloses a power system reliability assessment method, and relates to the technical field of power system reliability assessment. A power system is divided into a plurality of areas byusing switch equipment, each area is equivalent to a node, and the switch equipment is regarded as a branch; a traditional minimum path set is established by using a search algorithm; an element directly connected with the minimum path or connected with the minimum path through an isolating switch is also contained in the minimum path and is called as an improved minimum path; the improved minimumpath set is described by using a minimum path matrix; column operation is performed according to the minimum path matrix to obtain a first-order cut set and a second-order cut set of the system, thefirst-order cut setis a first-order minimum cut set; and then the second-order cut set is processed to obtain a second-order minimum cut set. Searching is perforemd by using the first-order minimum cut set to obtain a failure mode of circuit breaker operation refusal. The obtained fault mode comprises recovery information of the fault element, so that the reliability evaluation of the system can be simplified.

Description

technical field [0001] The invention relates to the technical field of power system reliability assessment. Background technique [0002] With the development of society, the power supply reliability of power system has been widely concerned. At present, power system reliability assessment has become the basis for decision-making in power sector planning and operation management. Power system reliability assessment methods can be divided into simulation methods and analytical methods. Simulation methods are time-consuming to obtain accurate reliability metrics. The analysis method is mainly the failure mode effect analysis method, which needs to enumerate all the failure modes of the load point. With the expansion of the power system scale, the fault impact analysis is very cumbersome, and the programming algorithms are also very complicated. Contents of the invention [0003] The purpose of the present invention is to provide a power system reliability assessment meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/06393G06Q50/06
Inventor 马庆安
Owner SOUTHWEST JIAOTONG UNIV
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