A balanced optimization method for distribution network main transformer operation

Abstract

The invention discloses an operation equilibrium optimization method of a main transformer of a distribution network, and relates to the field of power distribution of a power network. At present, while solving the heavy and overload of the main transformer of the distribution network, it often exacerbates the problem of low utilization of power grid equipment during the low power consumption period, or causes low return on investment in power grid construction and waste of investment in power grid construction. This technical scheme screens and optimizes the target main transformer group; by changing the feeder combination connected to the main transformer, the main transformer balance optimization calculation is performed on each target main transformer group, and the comprehensive index of each candidate scheme is calculated; the candidate is selected according to the comprehensive index The schemes are sorted, and the optimal scheme is selected for power flow calculation and verification; the feasibility evaluation of each candidate scheme is obtained according to the network loss value, and the optimal feasible scheme is obtained for the actual transformation of the distribution network. This technical solution reduces the peak load and volatility of the main transformer by changing the feeder connected to the main transformer, and increases the openable capacity of the main transformer of the distribution network. It is highly operable and has significant scalability.

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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