Power distribution network line constant value on-off detection method and system based on constant value coordination diagram

A detection method and technology of distribution network, applied in circuit devices, emergency protection detection, emergency protection circuit devices, etc., can solve the problem that the accuracy of protection setting value calculation cannot be guaranteed, the 10KV power grid system cannot be applied, and the accuracy cannot be guaranteed by manual calculation. and other problems, to achieve the effect of narrowing the scope of investigation, reducing time and labor costs, and ensuring the safety and reliability of power supply

Active Publication Date: 2020-12-15
国网山东省电力公司沂南县供电公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, for the operation and maintenance process of the distribution network, the switching operation of the protection device in the distribution network is controlled through the setting value setting of the protection device, so as to avoid the occurrence of safety accidents in the distribution network; for the setting value of the protection device to be adjusted , it is necessary to refer to the fixed value of its adjacent upper and lower protection devices, and calculate the fixed value according to the preset rules; in the prior art, most of them use manual calculations to judge the specific operation of the power gri

Method used

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  • Power distribution network line constant value on-off detection method and system based on constant value coordination diagram
  • Power distribution network line constant value on-off detection method and system based on constant value coordination diagram
  • Power distribution network line constant value on-off detection method and system based on constant value coordination diagram

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Embodiment 1

[0035] Such as figure 1 As shown, this embodiment provides a method for detecting switching on and off at a fixed value of a distribution network line based on a fixed value coordination diagram, including:

[0036] S1: Divide multi-stage protection according to the upper-lower relationship of the protection device in the substation wiring diagram;

[0037] S2: Use the distance protection conversion method to calculate the operating current and action time limit of each section of protection, obtain the fixed value of each section of protection, and simultaneously mark the fixed value and trip logic in the substation wiring diagram to construct a fixed value coordination diagram;

[0038] S3: According to the fixed value coordination diagram and the serial connection mode between substations, control the switching operation of the protection devices on the power supply side and the power consumption side.

[0039] In this embodiment, the CoBase system is used to obtain the wi...

Embodiment 2

[0204] This embodiment provides a fixed-value switch-on and withdrawal detection system for distribution network lines based on a fixed-value coordination diagram, including:

[0205] Segmentation module, which is used to divide multi-segment protection according to the upper-lower relationship of the protection device in the wiring diagram of the substation;

[0206] The calculation module is used to calculate the operating current and operating time limit of each section of protection by using the distance protection conversion method, obtain the fixed value of each section of protection, and simultaneously mark the fixed value and trip logic in the substation wiring diagram to construct a fixed value coordination diagram;

[0207] The control module is used to control the switch-on and withdrawal operations of the protection devices on the power supply side and the power consumption side according to the fixed value coordination diagram and the serial connection mode between...

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Abstract

The invention discloses a power distribution network line constant value on-off detection method and system based on a constant value coordination diagram. The method comprises the steps of: dividingmulti-section protection according to the superior-subordinate relation of protection devices in a transformer substation wiring diagram; calculating action current and action time limit of each section of protection by adopting a distance protection conversion method to obtain a constant value of each section of protection, synchronously marking the constant value and tripping logic in the transformer substation wiring diagram, and constructing a constant value matching diagram; and controlling the on-off operation of the power supply side protection device and the power utilization side protection device according to the fixed value matching graph and the belt stringing mode between the transformer substations. By dividing multi-segment protection, a distance protection conversion methodis adopted to calculate protection constant values in a segmented mode, and the efficiency of constant value calculation is improved; and a constant value matching graph is used to assist in controlling the on-off operation of the protection device, thereby reducing the line patrol operation and maintenance time, reducing the workload, increasing the power supply amount, and guaranteeing the power supply safety and reliability.

Description

technical field [0001] The invention relates to the technical field of electric power systems, in particular to a detection method and system for fixed-value commissioning and withdrawal of distribution network lines based on a fixed-value coordination diagram. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] At present, for the operation and maintenance process of the distribution network, the switching operation of the protection device in the distribution network is controlled through the setting value setting of the protection device, so as to avoid the occurrence of safety accidents in the distribution network; for the setting value of the protection device to be adjusted , it is necessary to refer to the fixed value of its adjacent upper and lower protection devices, and calculate the fixed value according to the preset rules; in the ...

Claims

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Application Information

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IPC IPC(8): H02H7/26H02H1/00G01R31/08
CPCH02H7/26H02H1/0007G01R31/086G01R31/088Y04S10/20
Inventor 贺云峰王家义滕晓辉庄绪珍刘晓东任富德王志强艾永富沈中华张纯哲
Owner 国网山东省电力公司沂南县供电公司
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