Low-voltage transformer area acceptance distributed photovoltaic power generation capability evaluation method

Abstract

The invention provides a low-voltage transformer area acceptance distributed photovoltaic power generation capability evaluation method. The method comprises the following steps: acquiring an evaluation index value of the low-voltage transformer area acceptance distributed photovoltaic power generation capability; and according to the evaluation index value, obtaining an evaluation result of the low-voltage transformer area acceptance distributed photovoltaic power generation capability, wherein the evaluation indexes comprise main transformer exchange capacity, line exchange capacity, adaptability of low-voltage power grid relay protection, voltage deviation, voltage fluctuation, flicker, operation network loss, harmonic pollution, reliability and economy. The evaluation indexes providedby the invention not only comprise the aspects of electric energy quality such as main transformer exchange capacity, but also comprise the aspects of flexibility and economy of distributed photovoltaic power generation, and are comprehensive; meanwhile, according to the evaluation method provided by the invention, weights are allocated to all the evaluation indexes, evaluation is carried out by adopting a weighted average method, and low-voltage transformer area acceptance distributed photovoltaic power generation capability can be comprehensively and scientifically evaluated.

Description

technical field [0001] The invention relates to the field of distributed power supply, in particular to a method for evaluating the ability of a low-voltage station area to receive distributed photovoltaic power generation. Background technique [0002] Solar energy is an inexhaustible source of energy, and it is one of the important measures to solve the problems of energy shortage and environmental pollution in the world today. my country, in particular, has a large land area, long average sunshine, and a large total amount of radiation, and has abundant solar energy resources. Distributed photovoltaic power generation devices can be installed near the user's premises. They have the characteristics of flexible configuration, low network loss, and high power supply reliability. They have high economic and social benefits, and thus have received more and more attention. However, the evaluation of distributed photovoltaic power generation capacity is still in its infancy. At...

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Problems solved by technology

[0003] When distributed photovoltaic power plants are connected to the grid, there are various power quality problems such as allowable voltage deviation and voltage stability, main transformer and line switching capabilities, and harmonics, as well as the flexibility and input-output economic benefits of distributed photovoltaic power generation devices. etc., resulting in the current evaluation of the consumption capacity of photovoltaic power plants in low-voltage power grids that is not sufficiently comprehensive and scientific for the evaluation of the ability to accept distributed photovoltaic power generation in low-voltage power grids. The evaluation of distributed photovoltaic power generation capacity in low-voltage station areas is inaccurate and incomplete

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