Medium and low voltage distribution network energy efficiency evaluation method based on accurate load measurement data

Abstract

The invention relates to a medium and low voltage distribution network energy efficiency evaluation method based on accurate load measurement data. A complete set of whole-process comprehensive energy efficiency evaluation method for a static and dynamic distribution network is constructed in a distribution network energy efficiency evaluation system. Through the method, various attribute elements of the distribution network can be scientifically, integrally and comprehensively reflected. The system is clear in theory. Compared with the traditional energy-saving and loss-reduction modification measures only based on a quarter line loss method and a sweeping approach, the system has more scientificalness and pertinency and provides a brand new thinking and method for energy efficiency evaluation and energy-saving modification for the distribution network. The invention has a valuable reference to specific distribution network energy efficiency evaluation in various regions, makes pointed references to the distribution network planning and modification construction and also helps distribution network operating personnel master the operating condition of distribution network energy efficiency. Scientific and reasonable distribution network construction and modification projects can be instructed and arranged in actual evaluation and planning works, reliable and economic operation of the distribution network is ensured, and huge economic benefits are created.

Description

technical field [0001] The invention belongs to the field of electric power systems, and in particular relates to a method for evaluating energy efficiency of a medium and low voltage distribution network based on accurately measured load data. Background technique [0002] According to statistics, the loss ratio of 220kV and above transmission network, 110kV (66kV, 35kV) high-voltage distribution network, and 10kV and below medium and low voltage distribution network in China is 10%: 15%: 75%, and the loss of medium and low voltage distribution network accounts for 10%: 15%: 75%. 3 / 4 of the entire network loss. In the transformation of urban and rural power grids, the problem of loss reduction has attracted extensive attention and is listed as one of the key problems to be solved in the transformation of power grids. However, with the conventional measures to increase supply and reduce losses (such as energy-saving transformers, increase reactive power compensation, increa...

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Problems solved by technology

[0006] Aiming at the shortcomings of the existing distribution network energy efficiency evaluation methods, such as roughness, lack of pertinence and blindness, the present invention proposes an energy efficiency evaluation method for medium and low voltage distribution networks based on accurate measurement of load data

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