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A Calculation Method of Distribution Network Line Loss Based on Improved Equivalent Resistance Method

A technology of equivalent resistance and calculation method, applied in the field of distribution network, can solve the problems of low calculation accuracy and unbalanced load of distribution network, and achieve the effect of accurate line loss rate and beneficial to economic operation.

Active Publication Date: 2020-02-04
SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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  • Application Information

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Problems solved by technology

However, in actual situations, the phenomenon of unbalanced distribution network load is common, so the calculation accuracy of this method is relatively low.

Method used

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  • A Calculation Method of Distribution Network Line Loss Based on Improved Equivalent Resistance Method
  • A Calculation Method of Distribution Network Line Loss Based on Improved Equivalent Resistance Method
  • A Calculation Method of Distribution Network Line Loss Based on Improved Equivalent Resistance Method

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Embodiment Construction

[0060] based on the following Figure 1 ~ Figure 2 , specifically explain the preferred embodiment of the present invention.

[0061] Since the unbalanced load in the distribution network is ubiquitous, the traditional equivalent resistance method does not consider the increase in the line loss of the distribution network caused by the load asymmetry. Therefore, in order to consider the impact of load imbalance on equivalent resistance meter and distribution network line loss, the equivalent resistance method is improved and corrected.

[0062] like figure 1 As shown, the distribution network line loss calculation method based on the improved equivalent resistance method provided by the present invention includes the following steps:

[0063] S1. Determine the parameters of the distribution network;

[0064] S2. Calculate the load current unbalance degree of the distribution network, and calculate the head-end structure coefficient of the distribution line according to the ...

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Abstract

The invention relates to a power distribution network line loss calculation method based on the improved equivalent electric resistance method. The power distribution network line loss calculation method comprises the following steps: S1, determining parameters of a power distribution network; S2, calculating the degree of unbalancedness of the load current of the power distribution network, and calculating the head-end structure coefficient of a distribution line according to the degree of unbalancedness; S3, calculating the total electric energy loss of the power distribution network according to the head-end structure coefficient and the improved equivalent electric resistance method; and S4, calculating the line loss rate of the power distribution network according to the total electric energy loss, and comparing the line loss rate with a practical line loss rate to calculate error. As the impact of unbalanced load on equivalent resistance and power distribution network line loss is taken into consideration, the line loss rate of the power distribution network can be calculated more accurately, and be more approximate to the practical line loss rate, and a guiding meaning is provided for economical running of the power distribution network.

Description

technical field [0001] The invention relates to a method for calculating line loss of a distribution network, in particular to a method for calculating line loss of a distribution network based on an improved equivalent resistance method, and belongs to the technical field of distribution networks. Background technique [0002] In recent years, with the state's support for small businesses and the improvement of people's living standards, the load on medium and low voltage distribution networks has grown rapidly. The medium and low voltage distribution network mostly adopts radial connection mode, and the power supply radius is large, resulting in the line loss of the medium and low voltage distribution network accounting for a large proportion of the entire network line loss. Therefore, the in-depth research on the calculation method of the line loss of medium and low voltage distribution network has certain theoretical significance and practical value. [0003] At present...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q50/06
CPCG06Q50/06
Inventor 杨帆刘俊陆冰冰
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO