Power distribution network main transformer operation equalization optimization method

Abstract

The invention discloses a power distribution network main transformer operation equalization optimization method, and relates to the field of power distribution of a power grid. At present, the problem that the utilization rate of power grid equipment in the existing power consumption valley period is intensified or the phenomena of low power grid construction investment return rate and power gridconstruction investment waste are caused while the problem of serious overload of the main transformer of the power distribution network is solved. According to the technical scheme, the method comprises the following steps: optimization target main transformer groups are screened; main transformer equalization optimization calculation is carried out on each target main transformer group by changing the combination mode of feeders accessed to the main transformers, and the comprehensive index of each candidate scheme is calculated; the candidate schemes are sorted according to the comprehensive index, and an optimal scheme is screened out for power flow calculation verification; and the feasibility of each candidate scheme is evaluated according to the network loss value, and an optimal feasible scheme is obtained to carry out actual transformation on the power distribution network. According to the technical scheme, the load peak values and volatility of the main transformers are reduced and the openable capacity of the main transformers of the power distribution network is improved by changing the feeders connected to the main transformers, and the method is of high operabilityand remarkable generalizability.

Description

technical field [0001] The invention relates to the field of power distribution of a power grid, in particular to a method for balancing and optimizing the operation of a main transformer of a power distribution network. Background technique [0002] With the rapid development of social economy, people's quality of life has been significantly improved, and users have higher and higher requirements for a stable supply of electric energy. There are potential safety hazards in the heavy overload operation of 10kV distribution network transformers, which may not only affect social production and cause economic losses, but also directly affect the living order of the people. Therefore, in order to provide users with a more stable, reliable and safe power supply, and to achieve the best state of power supply, it is of great practical significance to conduct research on the optimization of the main transformer operation of the distribution network. [0003] At present, in order to...

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Problems solved by technology

[0003] At present, in order to solve the problem of heavy overload of the main transformer in the distribution network, the measures usually taken are mainly to change the state of the tie switch or section switch, or add a new main transformer to transfer the load. Although this type of method meets the requirements of the distribution network The requirement for the load ratio margin of the main transformer has exacerbated the existing problem of generally low utilization rate of power grid equipment during the low power consumption period, which may lead to low return on investment in power grid construction and waste of investment in power grid construction

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