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Power supply reliability-oriented secondary optimization evaluation model for reliability of power distribution network

A technology for evaluating models and secondary optimization, applied in instruments, data processing applications, calculations, etc., can solve problems such as difficulty in expressing conditional dependencies, inability to disseminate hypothesis analysis, and failure to deeply reveal the degree of influence of component reliability.

Inactive Publication Date: 2014-01-22
STATE GRID CORP OF CHINA +2
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Problems solved by technology

The sensitivity method can only analyze the change of reliability index caused by the change of local parameters in each calculation, and does not reveal the influence degree of components on the overall reliability of the system, and a large number of repeated calculations are required to analyze the changes of different parameters
The minimum path algorithm and the minimum cut set algorithm analyze the influence of components on the reliability of the load point by recording the contribution of each component to the reliability index of the load point during the calculation process, but the minimum path algorithm or the minimum cut set algorithm and the disjoint The processing requires a large amount of calculation and node storage overhead, and these models are also difficult to express the conditional dependencies among various uncertain factors, and cannot flexibly carry out information dissemination and various hypothetical analysis

Method used

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  • Power supply reliability-oriented secondary optimization evaluation model for reliability of power distribution network
  • Power supply reliability-oriented secondary optimization evaluation model for reliability of power distribution network
  • Power supply reliability-oriented secondary optimization evaluation model for reliability of power distribution network

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Embodiment 1

[0061] A secondary optimization evaluation model for distribution network reliability oriented to power supply reliability. The evaluation model includes a minimum isolation area sub-model, a fault area impact sub-model and a load area statistics sub-model. Both the sub-model and the evaluation model use a dual Layer isomorphic structure, double-layer means that the model includes two layers of probability layer and frequency layer, which are used to calculate the outage probability index and outage frequency index respectively; "isomorphic" means that the graphic structure of the probability layer and the frequency layer One layer of graph structure can correspond to two layers of data,

[0062] Due to the short duration of instantaneous power outage events, their impact on the annual power outage time can be ignored, but the impact on the frequency of instantaneous power outages needs to be considered. Therefore, the instantaneous power failure is not calculated in the proba...

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Abstract

The invention discloses a power supply reliability-oriented secondary optimization evaluation model for the reliability of a power distribution network. The evaluation model comprises a smallest isolation area sub-model, a failing area influence sub-model and a load area statistical sub-model, wherein a double-layer heterogeneous structure is adopted for each of the sub-models and the evaluation model, and comprises a probability layer and a frequency layer, which are used for calculating a power failure probability index and a power failure frequency index respectively, graphic structures of the probability layers and the frequency layers are the same, and a layer of graphic structure can correspond to two layers of data during model storage. According to the power supply reliability-oriented secondary optimization evaluation model for the reliability of the power distribution network, an intuitive graphical method, a solid probability theory basis and an effective reasoning algorithm are used for performing modeling and reliability analysis on the power distribution network.

Description

technical field [0001] The invention relates to an evaluation model of distribution network power supply reliability, in particular to a distribution network reliability secondary optimization evaluation model for power supply reliability. Background technique [0002] The power distribution system is an important link between the power supply and the user, and its power supply reliability has a direct relationship with the user. With the improvement of users' requirements for power supply quality, people pay more and more attention to the reliability of power distribution system. The power distribution system has the characteristics of many components and complex structures. How to quickly and accurately evaluate the reliability and determine the weak links of the network has become a very important issue. [0003] At present, the reliability planning modeling and analysis methods of distribution network mainly include sensitivity analysis method, minimum path algorithm an...

Claims

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Application Information

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IPC IPC(8): G06Q50/06
Inventor 吴思谋何后裕蔡秀雯王毅峰林明熙许杭海王彦铭李小娴
Owner STATE GRID CORP OF CHINA
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