Comprehensive evaluation method for reliability and economy of radiation type power distribution network

Abstract

The invention belongs to the field of power distribution network reliability evaluation, and particularly relates to a comprehensive evaluation method for the reliability and economy of a radiation type power distribution network. A multi-objective optimization model based on the mixed integer nonlinear programming is constructed, so that the problem of complexity between the reliability investment and the reliability level improvement amplitude is solved, and the distribution network technical constraints and the reliability index constraints are fully considered during the multi-objective optimization process. A fuzzy membership function of the failure rate and the failure duration is constructed according to the historical power failure data by applying the fuzzy theory to estimate the power failure parameter failure rate and the failure duration, so that the problems of limited historical power failure data and power distribution system fuzziness are solved. The method provided by the invention can help the power supply company to analyze the investment cost required by a reliability transformation scheme, can select the optimal reliability transformation scheme on the premise that the distribution network meets a certain reliability level, and has a certain practical value.

Description

technical field [0001] The invention belongs to the field of distribution network reliability evaluation, and particularly relates to a comprehensive evaluation method for the reliability and economy of a radiation type distribution network. Background technique [0002] In the entire power system, the distribution network, as a link directly connected to the power customers, directly affects the power supply of the power customers. Therefore, the reliability of the power supply of the distribution network has become the focus of power supply enterprises and power customers. By means of distribution network reconstruction, improving the level of distribution network technology and equipment, and improving the level of distribution network operation and maintenance, the failure duration and failure rate can be reduced, thereby improving the reliability of the distribution network. However, in power distribution system planning, how to improve the reliability of the distributi...

AI Technical Summary

Problems solved by technology

Therefore, for the above problems, the present invention proposes a fuzzy model of fault duration and failure rate to solve the limited and fuzzy problems of historical power outage data

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