Method for quantified assessing three-phase imbalance treating effect

Abstract

The invention discloses a method for quantified assessing three-phase imbalance treating effect. The method includes the steps of obtaining the shape factor interval value of a distribution transform outlet line, obtaining a shape factor interval value before three-phase imbalance treatment, determining the instantaneous three-phase imbalance level, determining the instantaneous average current of loads, calculating equivalence resistance of the line, calculating the electric quantity interval loss, and obtaining the really saved electric quantity by comparing with a measured loss value. Load states before and after three-phase imbalance treatment are normalized to a same load level, so that the line loss values before and after three-phase imbalance treatment can be compared to obtain the really saved electric quantity. The three-phase imbalance treating effect can be assessed in a quantified way, good technical foundation is provided for development of low carbon electric power of a power grid, and huge economic benefit can be provided to electric power enterprises.

Description

technical field [0001] The invention belongs to the field of low-carbon and energy-saving distribution networks, and in particular relates to a quantitative evaluation method for three-phase imbalance control effects. Background technique [0002] From the perspective of my country's energy structure, saving energy and protecting the environment is a long-term strategic policy for my country's economic and social development. Since my country's energy is mainly coal, the current carbon emissions mainly come from the energy sector, especially the power industry. The subject of emissions. As the main carrier of power transmission, the power grid should focus on energy conservation and loss reduction in all aspects of power generation, transmission, distribution, and power consumption. This is also the development goal and social responsibility of power grid enterprises. Effectively reducing the loss of low-voltage distribution network lines has far-reaching significance for en...

AI Technical Summary

Problems solved by technology

The above research has carried out a quick and effective calculation of the line loss caused by the three-phase unbalance, but the above research only involves the calculation of the corresponding line loss when the three-phase unbalance degree is determined, and cannot reflect the three-phase unbalance. real energy saving

Because the operating status of the power grid is not exactly the same before and after the three-phase unbalance control, it is not practical to simply compare the line losses in the two states before and after the three-phase unbalance control

[0005] To sum up, although there are many studies on the calculation method of line loss caused by three-phase unbalance, the obtained results cannot reflect the real energy-saving loss effect of the power grid, so a quantitative evaluation method for three-phase unbalance control effect is needed. Provide a theoretical basis for the preliminary research on energy efficiency evaluation of new energy-saving equipment and technology and improve the energy efficiency detection method and evaluation system of energy-saving equipment, and provide decision-making reference for power grid enterprises in the application of new energy-saving equipment

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