Quantitative analysis method for influence of electric energy quality on comprehensive energy consumption of power transmission line

Abstract

The invention relates to the field of power equipment energy consumption monitoring and energy saving assessment, in particular to a quantitative analysis method for influence of electric energy quality on comprehensive energy consumption of a power transmission line. The quantitative analysis method mainly comprises the steps of: (1) acquiring electric energy quality data parameters of the power transmission line from an electric energy quality online monitoring device; (2) carrying out quantitative analysis calculation according to energy consumption of the power transmission line caused by harmonic waves, energy consumption of the power transmission line caused by voltage deviation and energy consumption of the power transmission line caused by three-phase unbalance degree; (3) and endowing different weights for calculating energy consumption of the power transmission line based on results of quantitative analysis calculation of the energy consumption of the power transmission line caused by harmonic waves, energy consumption of the power transmission line caused by voltage deviation and energy consumption of the power transmission line caused by three-phase unbalance degree. The quantitative analysis method offers practical and effective help in quantitative analysis of energy consumption distribution characteristics of the power transmission line, studying and developing power transmission line energy-saving measures and the like, and provides effective data support for analyzing energy consumption of the power transmission line.

Description

technical field [0001] The invention relates to the fields of energy consumption monitoring and energy-saving evaluation of electric equipment, in particular to a quantitative analysis method for the influence of power quality on comprehensive energy consumption of transmission lines. Background technique [0002] Energy saving and loss reduction is one of the development directions of the smart grid. The transmission line is an important link in the power system and the main method of power transmission through power transmission, exchange, regulation and distribution. Its main features are: a wide distribution area, the environment of the area it passes through is relatively complex, and it is easy to be restricted and affected by various factors to form different faults and morphological differences. Once the transmission line fails, it will endanger the power supply safety and power supply efficiency of the power supply area, and even cause immeasurable losses in severe ...

AI Technical Summary

Problems solved by technology

Long-term research and analysis of power quality shows that different power quality phenomena will more or less bring additional energy consumption to electrical equipment (including transmission lines), for example, when harmonic current flows through transmission lines, it increases the eddy current of transmission lines Loss, circulation loss, shielding resistance loss, as the harmonic frequency increases, the skin effect becomes more serious and the loss is greater; when the voltage is high or the three-phase load is unbalanced, the loss of the transmission line will also increase

However, since power quality and energy saving are two relatively independent fields, the research on the application of power quality data at home and abroad, especially the research on equipment energy consumption caused by poor power quality, is still in its infancy, staying at the qualitative analysis level, and there is no Develop intuitive and accurate quantitative analysis methods and models; especially the research on quantitative analysis methods of multiple power quality indicators for equipment energy consumption is still in the blank

Therefore, in actual work, it is impossible to quantitatively calculate the impact of power quality on the comprehensive energy consumption of transmission lines, and it is impossible to evaluate the direct economic benefits of power quality control, which affects the development of power grid equipment energy saving work

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