Overhead remote transmission fault indicator
At present, small-current grounding systems are mostly used in distribution networks. When single-phase grounding faults occur in such systems, due to the small fault current and complex fault characteristics, the selection and positioning of single-phase grounding in low-current grounding systems has always troubled the distribution network. Operational technical difficulties. Accurate selection of grounding lines and finding grounded sections can avoid unnecessary switching operations and maintain continuous power supply.
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Power Distribution Terminal
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Overhead remote transmission fault indicator
At present, the distribution network mostly adopts the low-current grounding system. When a single-phase grounding fault occurs in such a system, due to the small fault current and complex fault characteristics, the selection and positioning of the single-phase grounding in the low-current grounding system has always been a problem. Technical difficulties in distribution network operation. Accurate selection of grounding lines and finding grounded sections can avoid unnecessary switching operations and maintain continuous power supply. The principle of signal source detection method (asymmetrical current) to detect single-earth fault is to realize fault line selection and fault point by detecting the characteristics of the asymmetrical current signal generated on the fault line according to the characteristics of single-phase grounding fault of small current grounding system. positioned.
Overhead Recording Failure Indicator
The distribution network fault location system is a simple and practical solution for distribution automation. The wave recording type fault location system is composed of the main station background, acquisition unit, collection unit, supporting communication terminal and necessary public communication network. It is suitable for online detection of 3~35kV overhead lines, and has line fault collection and fault information actively reported to the main station. It has the characteristics of simple use, stable operation, convenient maintenance, high reliability, good openness and high cost performance.
The acquisition unit of the wave recording type fault location device has the functions of fault recording, zero-sequence current synthesis, and micro-power wireless networking. The fault information can be uploaded to the remote collection unit through the local wireless network, and then the collection unit will real-time fault information. Report to the master station positioning system, and the master station will process and complete the graphical positioning display.
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Henan Sanhe Electric Group Co., Ltd.
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Copyright © Henan Sanhe Electric Group Co., Ltd.
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