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Transformer area line impedance calculation method and calculation system, and computer readable storage medium

A line impedance and calculation method technology, applied in the field of distribution network, can solve the problem of inaccurate monitoring of line impedance in the station area, so as to improve the reliability of power supply, improve the calculation accuracy, and reduce the occurrence of faults

Active Publication Date: 2021-03-26
广东电网有限责任公司云浮供电局
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the inaccurate monitoring of the line impedance in the station area in the above-mentioned prior art, the present invention provides a calculation method for the line impedance in the station area

Method used

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  • Transformer area line impedance calculation method and calculation system, and computer readable storage medium
  • Transformer area line impedance calculation method and calculation system, and computer readable storage medium
  • Transformer area line impedance calculation method and calculation system, and computer readable storage medium

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Experimental program
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Effect test

Embodiment 1

[0068] like Figure 1 to Figure 4 As shown, a method for calculating line impedance in a station area includes the following steps:

[0069] S1: Construct the equivalent power supply circuit model of the station area;

[0070] S2: Construct a mathematical model of loop impedance according to the equivalent power supply loop model of the station area in step S1;

[0071] S3: Using the collected voltage and current data of distribution transformers and users in the station area and the mathematical model of loop impedance, based on the binary linear regression analysis algorithm, solve the line impedance in the station area.

[0072] Wherein, step S1 specifically includes the following steps:

[0073] s11: if figure 1 As shown, it is the equivalent power supply circuit diagram of the urban building station area. According to the voltage distribution characteristics of each user and distribution transformer in the low-voltage distribution station area, the closer the user's po...

Embodiment 2

[0119] The modeling process is as follows:

[0120] 1. According to the voltage distribution characteristics of each user and distribution transformer in the low-voltage distribution station area, the closer the user's power supply position is to the same-phase outlet position of the distribution transformer, the closer the user's voltage is to the same-phase voltage of the distribution transformer to which the user belongs. Reflected on the equivalent power supply circuit diagram of the urban building station area, the voltage distribution characteristics of the distribution transformer in the station area and the k users connected to each phase at any time are as follows:

[0121] UT(t)>U1(t)>U2(t)>U3(t)>…>UK(t)

[0122] Considering the possible impact of the instantaneous measurement error of the smart meter, this feature can be further established on the basis of the daily average voltage, that is, the 96-point daily average voltage distribution between the distribution tr...

Embodiment 3

[0147] A system for calculating line impedance in a station area includes a memory and a processor. The memory includes a program for calculating the line impedance in a station area. When the program for calculating the line impedance in a station area is executed by the processor, the following steps are implemented:

[0148] S1: Construct the equivalent power supply circuit model of the station area;

[0149] S2: Construct a mathematical model of loop impedance according to the equivalent power supply loop model of the station area in step S1;

[0150] S3: Using the collected voltage and current data of distribution transformers and users in the station area and the mathematical model of loop impedance, based on the binary linear regression analysis algorithm, solve the line impedance in the station area.

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Abstract

The invention relates to the technical field of power distribution networks, in particular to a transformer area line impedance calculation method. The invention discloses a transformer area line impedance calculation method. The method comprises the following steps: S1, constructing a transformer area equivalent power supply loop model; s2, constructing a loop impedance mathematical model according to the transformer area equivalent power supply loop model in the step S1; and S3, solving the transformer area line impedance based on a binary linear regression analysis algorithm by utilizing the acquired voltage and current data of the transformer area distribution transformer and the user and the loop impedance mathematical model. According to the invention, the purpose of further improving the transformer area user impedance calculation precision can be achieved, the user loop impedance is monitored in real time, the line aging phenomenon is found in time, short-circuit or open-circuit fault pre-judgment is conducted, faults can be effectively reduced, the power supply reliability is improved, and through monitoring and analysis of the low-voltage user loop impedance, the abnormalelectricity utilization behaviors of electricity stealing of users can be effectively found, and an electricity manager is helped to strengthen electricity utilization management.

Description

technical field [0001] The present invention relates to the field of distribution network technology, and more specifically, to a calculation method, a calculation system and a computer-readable storage medium for line impedance in a station area. Background technique [0002] Due to the large number of users, complex power supply network, uneven quality of power supply lines, and frequent changes in equipment and lines, low-voltage distribution network graphics and models are difficult to draw and measure effectively. At the same time, with the increase of the service life of the line and the erosion of the external harsh natural environment, the line will gradually age. On the one hand, there is a possibility of disconnection in the aging line, and more often, after the aging of the wire, the insulation performance decreases, and leakage or short circuit is prone to occur. It has brought great potential safety hazards to the daily life of users. As a typical type of low-v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F113/04
CPCG06F30/20G06F2113/04
Inventor 庞鹏蔡日欧锋钟爽赖国清赖群黄祖迪林海明冯超坤刘涵陈东明
Owner 广东电网有限责任公司云浮供电局
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