Calculation method for theoretical line loss of distribution network considering small power supply

A calculation method and a technology of theoretical line loss, applied in the field of power system, can solve the problems of shortage of running records, difficult to realize calculation, lack of solutions, etc., and achieve the effect of simple and clear calculation process, improved accuracy, and obvious correction effect.

Inactive Publication Date: 2019-01-11
UNIV OF JINAN
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Problems solved by technology

Based on the power flow calculation, it considers the influence of small power sources to the distribution network or the reverse power and the line voltage on the loss, and removes the assumption that the node voltages are equal. Due to the large scale of the distribution network

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  • Calculation method for theoretical line loss of distribution network considering small power supply
  • Calculation method for theoretical line loss of distribution network considering small power supply
  • Calculation method for theoretical line loss of distribution network considering small power supply

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[0061] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0062] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0063] It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore, it is to be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates that There are features, steps, operations, devices, components and / ...

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Abstract

The invention discloses a calculation method for theoretical line loss of a distribution network considering a small power supply. The calculation method comprises the following steps of: obtaining aresistance of each branch of the distribution network, the active power, a reactive power, a voltage and current data of each node; counting a power consumption of each small power node, using an average current method to calculate the power loss of the distribution network; calculating injection current of each node according to the active power, the reactive power, a voltage amplitude and a current amplitude of each node; forming a path mutual resistance matrix by using a search method; obtaining an accurate electric energy loss calculation model, and a loss calculation model based on the average current method by adopting a loop analysis method based on the path mutual resistance matrix and the injection current of each node; using the accurate power loss calculation model, and the losscalculation model based on the average current method to obtain a calculation error of the average current method, that is, a correction amount of loss; and calculating the sum of the power loss obtained by the average current method and the correction amount of the loss, and obtaining the theoretical power loss of the distribution network.

Description

technical field [0001] The invention belongs to the technical field of electric power systems, and in particular relates to a method for calculating the theoretical line loss of a distribution network that takes into account small power sources. Background technique [0002] Distribution network line loss is a comprehensive economic and technical indicator. Reasonable and accurate theoretical calculation method of line loss has important practical significance for reducing line loss and improving economic benefits. At present, the theoretical line loss calculation methods of distribution network mainly include root mean square current method, average current method, loss factor method and equivalent resistance method. Among them, the root mean square current method has a simple calculation process and high calculation accuracy, but due to the complex structure of the distribution network and imperfect parameters, the calculation workload of this method is large, and the cal...

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Application Information

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IPC IPC(8): G01R31/08H02J3/00
CPCG01R31/088H02J3/00H02J2203/20
Inventor 汝绪丽陈芳程新功
Owner UNIV OF JINAN
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