Load torque margin based zone area state analysis method of power distribution network

Abstract

The invention discloses a load torque margin based zone area state analysis method of a power distribution network. The load torque margin based zone area state analysis method comprises the following steps of simplifying a grid structure to single-radiation topological types of all load sets hung on a trunk line in a distribution way, wherein the grid structure is a radiation type or adopts other emanant structural types in a zone area of the power distribution network, and branch lines of the zone area are expressed by a large load of a set on a connection point of the trunk line; calculating a load torque value F under a working condition; selecting a circuit model with maximum wire diameter in the trunk line as a reference circuit type of the zone area; acquiring a load torque threshold value F under a corresponding power factor; and solving the load torque margin Delta F of the zone area, thereby obtaining each load margin state possibly severing as an access point of the power distribution zone area according to the load margin Delta P. On one hand, the load torque margin based zone area state analysis method disclosed by the invention can be used for selecting an appropriate load access position, on the other hand, the construction plan of the zone area can be conveniently incorporated into a power distribution network rolling plan, and the life of users and stable household economic development of the zone area are ensured.

Description

technical field [0001] The invention relates to a method for analyzing the state of a distribution network station area, in particular to a method for analyzing the state of a distribution network station area based on a load moment margin. Background technique [0002] Rural power grid is an important part of distribution network. With the development of rural economy, the construction of new countryside puts forward higher requirements on the power supply capacity and quality of rural power grid, and the scope and scale of rural power grid coverage continue to expand. Voltage quality is the basic condition for guaranteeing power supply services. In recent years, the use of household appliances has grown rapidly. "Low voltage" in station areas has become a major problem affecting residents' production and living electricity. Therefore, the user access planning of low-voltage station areas and existing station The analysis of regional load margin status is of great significa...

AI Technical Summary

Problems solved by technology

[0003] Due to the lack of clear guidance on technical principles, there are relatively few studies on user load access and margins in low-voltage station areas. The specific related work still mainly relies on the experience of on-site operators, which is somewhat blind and lacks applicable auxiliary methods.

In addition, the current reconstruction work of the station area is relatively lagging behind, and the treatment work is often carried out after a period of time when the problem occurs, and it is not possible to effectively analyze the station area in advance, determine a reasonable plan for the implementation of the station area renovation, and eliminate the "low voltage" problem In the stage that has not yet appeared or is about to appear, to ensure the quality of electricity consumption and normal life of residents

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