Constant-capacity model selection method considering access of light storage system for power distribution transformer

Abstract

The invention discloses a constant-capacity model selection method considering access of a light storage system for a power distribution transformer. The constant-capacity model selection method comprises the steps of collecting data such as a power distribution technological economic parameter, an energy storage technological parameter and load annular rate of increase; respectively collecting historical data samples of power distribution and transformation low-voltage side load, photovoltaic contribution and a voltage of a high-voltage side for N days, and building a time sequence probability model on the basis of multi-parameter normal-distribution load, the photovoltaic contribution and the voltage of the high-voltage side; building power distribution and transformation model-selectionconstant-capacity dual-layer optimization model taking minimum power distribution and transformation life-cycle cost as a target and considering influence of power distribution and transformation low-voltage side voltage, load rate change constraint, power distribution and transformation running lifetime constraint and energy storage active control; and solving an upper-layer planning model by acataclysmic genetic algorithm, and solving a lower-layer running model by a generalized gradient descent method combined with a three-point estimation method to obtain power distribution and transformation optimal configuration scheme. The influence of the load, the photovoltaic randomness and the energy storage active control on power distribution and transformation constant-capacity model selection is considered, and the scientificity and the economy of a power distribution and transformation configuration scheme are reflected.

Description

technical field [0001] The invention relates to the technical field of considering economical configuration of distribution network equipment, and in particular to a method for constant capacity selection of distribution transformers considering access to optical storage systems. Background technique [0002] Distribution transformer (referred to as distribution transformer) is an important power equipment in the distribution network. It has a large amount of use, a wide range of applications, a long running time, and great energy-saving potential. How to make an economical and scientific distribution transformer investment decision is an important issue in planning and building a safe, reliable and economical distribution network. [0003] In order to make the distribution transformer investment plan economically feasible, it is necessary to accurately calculate the value change characteristics of the distribution transformer during its service period, including initial pur...

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Problems solved by technology

Therefore, under the condition of the active distribution network, the method of calculating the LCC of the distribution transformer with a constant operating life will lead to inaccurate evaluation results, which will easily cause the planning scheme to be too conservative or optimistic.

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