Power distribution network multi-blocking control method based on load aggregator optimization and grading

Abstract

The invention relates to a power distribution network multi-blocking control method based on optimal grading of load aggregators, and the method comprises the following steps: S1, obtaining the information of a power transmission line, calculating a line blocking risk index, and building a comprehensive load transfer distribution factor model; S2, obtaining all load aggregators participating in congestion management and demand response time period information, and grading the load aggregators by adopting gray fixed weight clustering according to reliability indexes of the load aggregators and a comprehensive load transfer distribution factor model; and S3, obtaining congestion management cost information of the load aggregator, establishing a power distribution network congestion management optimization model by taking the minimum congestion management cost as an optimization objective function, and generating a power transmission line congestion management scheme by adopting opportunity constraint according to a grading result of the load aggregator. Compared with the prior art, the method has the advantages that the higher reliability of the system is ensured under the condition of slightly increasing the congestion management cost, and the re-congestion phenomenon of the system caused by photovoltaic uncertainty output is effectively resisted.

Description

technical field [0001] The invention relates to the technical field of congestion management after the occurrence of congestion in a distribution network, in particular to a method for controlling multiple congestions in a distribution network based on the optimal classification of load aggregators. Background technique [0002] With the development of society and economy, the power load of the power grid continues to rise, especially the air-conditioning load in the distribution network and the charging load of electric vehicles. The distribution of power load in time and space is uneven, resulting in the distribution line running close to the limit of stability. If the power flow of the system is not adjusted reasonably, the power flow of some lines with weak transmission capacity in the distribution network will exceed the limit, resulting in distribution network congestion. [0003] Investing in the replacement of distribution lines, transformers, and other in-grid powe...

AI Technical Summary

Problems solved by technology

If the power flow of the system is not adjusted reasonably, the power flow of some lines with weak transmission capacity in the distribution network will exceed the limit, resulting in distribution network congestion.

[0003] Investing in the replacement of distribution lines, transformers, and other in-grid power equipment is the most direct and effective way to alleviate distribution grid congestion, but this method is capital-intensive congestion management and only generates value at peak loads, further reducing grid operation. efficiency

In addition, direct control methods can be used to eliminate line power flow violations, such as network reconfiguration of the distribution network, limiting load power consumption, or calling auxiliary equipment, etc., but such methods will affect users' satisfaction with electricity consumption. Moreover, the related operations in the scheduling control process are complicated

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