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Comprehensive power distribution network fault risk assessment method

A distribution network fault and comprehensive evaluation technology, applied in the field of distribution network, can solve problems such as weakness, failure to propose overall failure risk and technical management, failure to strictly distinguish the risk of failure and blackout events, etc., and achieve a good guiding effect

Inactive Publication Date: 2014-11-19
TIANJIN UNIV +3
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Problems solved by technology

The deficiencies of the above literature are: 1) the research mainly focuses on the economic risk, and there is no targeted research on the risk of outage; 2) there is no strict distinction between the risk caused by the outage event and the pre-arranged outage event; 3) there is no A set of evaluation methods that can comprehensively reflect the overall failure risk and technical management weaknesses of the distribution network

Method used

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  • Comprehensive power distribution network fault risk assessment method
  • Comprehensive power distribution network fault risk assessment method
  • Comprehensive power distribution network fault risk assessment method

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Embodiment Construction

[0019] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0020] The evaluation basis of the present invention is the comprehensive failure probability value and the comprehensive failure consequence value. The calculation method of the distribution network fault risk value determined according to the concept of distribution network fault risk assessment is:

[0021] Failure risk value = comprehensive failure probability value × comprehensive failure consequence value.

[0022] Among them, the comprehensive failure probability value and the comprehensive failure consequence value are respectively calculated from the reference failure probability value, reference failure consequence value and related influence factors calculated in the failure risk assessment index system. The product of the comprehensive failure probability value and the comprehensive failure consequence value...

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Abstract

The invention discloses a comprehensive power distribution network fault risk assessment method. According to the method, firstly basic information of a power distribution network is obtained for calculating the value of a basic index; then the index is graded based on a grading standard; a comprehensive fault probability value, a comprehensive fault result value and a fault risk value are calculated according to the weight of the index, the grade of the index and the value of each factor; and finally, the power distribution network is subjected to fault risk grading according to the calculation results and then analysis of weak links of the power distribution network is carried out. Compared with the prior art, the method can comprehensive assess the power distribution network fault power-off risk under influence of many factors, is suitable for evaluation and comparison of power distribution networks in different regions in China, and has a good guidance function for plan and construction of power distribution networks.

Description

technical field [0001] The invention belongs to the field of distribution networks of power supply systems, in particular to a distribution network operation risk assessment method. Background technique [0002] Grid security refers to the ability of the grid to resist disturbances such as faults, which directly reflects the strength of the grid and the ability to provide uninterrupted power supply to users. The safe operation of the distribution network is an important part of the safe operation of the entire power grid, and it is the key link to improve the operation level of the power supply system. Statistics show that about 80% of power outages are caused by power distribution system failures. Therefore, it has become an urgent problem to be solved to accurately assess the risk of power outage in the distribution network, find out the weak link and improve it, so as to improve the security of power supply. [0003] At present, the research on power system risk assessm...

Claims

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Application Information

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IPC IPC(8): G06Q50/06
CPCY04S10/50
Inventor 刘洪朱振环马康
Owner TIANJIN UNIV
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