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Low-current line selection device for wireless networking

A line selection device and wireless networking technology, applied in the field of power systems, can solve problems such as misjudgment and difficulty in troubleshooting ground fault lines, and achieve the effects of small installation space, improved accuracy, and high line selection accuracy

Active Publication Date: 2015-04-08
ANHUI HEKAI ELECTRICAL TECH CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

It is difficult to eliminate the ground fault line, and it is easy to cause wrong judgment

Method used

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  • Low-current line selection device for wireless networking

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Embodiment Construction

[0017] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0018] like figure 1 As shown, a wireless network small current line selection device, a line selection controller is installed in each power distribution room (arc suppression cabinet, suppression cabinet), and the line selection controller selects an independent line selection controller for each power distribution room Some arc suppression methods are used to select the line, and then the most likely faulty line is selected for each power distribution room, the value change and direction change information of the zero-sequence current of the faulty line, the line selection method, and the time of occurrence are uniformly sent through the GPRS network. For the line selection receiving device of the main station, and the receiving controller in...

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Abstract

The invention discloses a low-current line selection device for wireless networking. Each power distribution room is provided with a line selection controller; each line selection controller selects a unique arc-suppression mode to select the line according to each power distribution room; the most likely faulty line, numerical value change and direction change information of zero-sequence current of the faulty line, a line selection mode and occurrence time selected out from each power distribution room are uniformly transmitted to a line selection receiving device through a GPRS (general packet radio service) network; a receiving controller in a master station uniformly receives the data transmitted from the line selection controller for the power distribution rooms within a certain period of time; meanwhile, the receiving controller in the master station also collects a path of incoming line zero sequence CT; whether an outer network, a bus or an outer network has fault can be judged according to the incoming line; the data of all power distribution rooms and the data of the incoming line are uniformly compared and judged; finally the sole faulty line is determined, thus the line selection accuracy rate is improved; the data are transmitted to mobile phones or other equipment of customers for reminding through a GSM (global system for mobile communications) short message function after the faulty line is selected out.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a wireless network small current line selection device, especially a line selection device capable of selecting faulty lines for complex power systems. Background technique [0002] At present, the low-current grounding system is widely used in the 6-35KV power grid system in my country, and the probability of single-phase grounding fault in the small-current grounding system is as high as 80%, and it has caused serious losses to the power grid system. Therefore, timely handling of ground faults is of positive significance to the safe operation of power systems. However, there are different arc suppression methods in the unified system, which will cause the zero-sequence current in each substation to not be calculated according to the same algorithm. The line selection accuracy of the line selection device in the system is poor. It is difficult to eliminate the ground fau...

Claims

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Application Information

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IPC IPC(8): G01R31/08
Inventor 王笋张泉斌
Owner ANHUI HEKAI ELECTRICAL TECH CO LTD
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