Method for evaluating power supply reliability of power distribution network

Abstract

The invention discloses a method for evaluating the power supply reliability of a power distribution network and belongs to the field of power distribution network power supply. The method includes: reading the original data firstly and enumerating corresponding fault events for grid equipment; searching a transformer to obtain power supply interrupted regions caused by faults, conducting fault state simulation and distinguishing the recoverable power supply region from the unrecoverable power supply region; for each fault event of the recoverable power supply region, acquiring the load transferring path through the load transferring path analysis; conducting load flow calculation, if the load flow is overload and the load transferring is not successful, acquiring a new load transferring path; and calculating the reliability index of each load point and the whole power distribution network according to the recoverable power supply region and the unrecoverable power supply region after faults. The method can more accurately and comprehensively evaluate the power supply reliability of the power distribution network so that the level which the urban power grid can reach in the aspect of the power supply ability, the present problems and the development prospect can be deeply realized.

Description

technical field [0001] The invention belongs to the field of distribution network power supply, in particular to a distribution network power supply reliability evaluation method. Background technique [0002] The urban power grid is an important infrastructure of the city and an important material guarantee for the development of the national economy and social progress. [0003] In recent years, the urban power grid has undergone large-scale construction and transformation, and the power supply capacity, reliability and quality of power supply have been significantly improved. With the rapid development of China's national economy, the growth of power load has accelerated significantly, and the development of urban power grids is facing new opportunities and challenges. The assessment of power supply capacity of power grids is an essential part of power grid planning. [0004] Domestic research on the evaluation system of power grid planning has just started, and there is...

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Problems solved by technology

Although foreign countries have relatively mature theories and rich experience, it is difficult to directly learn from the development stage, development tasks and power market organization methods of foreign power systems and the current situation in Jiangsu Province.

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