The safe operation of high-voltage cables is crucial in power transmission and distribution systems. target, aim at, address, focus on, in response to10kVThe grounding status of the metal protective layer of single core cables with voltage levels and above directly affects the overall safety and service life of the cable.Online monitoring system for circulating current of high-voltage cable sheath(With)TH-Z-CT01As an advanced monitoring method, the model effectively prevents safety hazards caused by multi-point grounding by real-time monitoring of the grounding current of the cable metal sheath. This article will provide a detailed analysis of the structural composition and functional characteristics of the system.

system architecture

The online monitoring system for high-voltage cable sheath circulation mainly consists of two core parts: front-end monitoring equipment and back-end monitoring center, which are closely connected through efficient communication links to form a complete monitoring system.

Front end monitoring equipment

Front end monitoring equipment is system based“sense”Partially installed directly on key monitoring points of high-voltage cables. Its core components include:

high precisionCTCurrent Transformer: Adopting0～200ASingle mode precise design, capable of accurately capturing small current changes at the grounding point of the cable metal sheath, with measurement accuracy not lower than0.5Level to ensure the reliability of data.

Accurate grounding circulation collection device: andCTThe current transformer works closely together to collect and process real-time grounding current data, providing a foundation for subsequent analysis.

Weather resistant shell: using aluminum die-casting technology, the shell achievesIP65Protection level, capable of-20℃to+85℃Stable operation in a temperature environment with humidity coverage15%~98%Adapt to various harsh weather conditions.

Industrial grade components: The system uses industrial grade standard components internally, which are resistant to high and low temperatures, ensuring stability and durability during long-term operation.

Backend monitoring center

The backend monitoring center is part of the system“brain”Responsible for receiving, processing, and analyzing data uploaded by front-end devices. Its functions include but are not limited to:

Data reception and parsing: throughRS485or4GCommunication method, real-time reception of grounding circulation data sent by front-end devices, and analysis and processing.

Intelligent analysis and warning: The system has built-in intelligent algorithms that can autonomously set warning and alarm values. Once abnormal circulation data is detected, the warning mechanism is immediately triggered to notify maintenance personnel to handle it in a timely manner.

Data Storage and Query: Provides long-term data storage functionality, supports querying and analyzing historical data, and provides data support for cable operation and maintenance.

Remote management and control: Support remote configuration of front-end device parameters, upgrade system software, and achieve unmanned automated management.

System functions

Real time monitoring and warning: The system can continuously monitor the grounding current of the cable metal sheath, upload data to the monitoring center in real time, and immediately warn if any abnormalities are found, effectively preventing safety hazards such as cable outer sheath breakdown and sheath protector burnout caused by multi-point grounding.

Replace manual inspection: Replace the traditional manual periodic grounding circulation inspection method, greatly reduce the labor intensity of on-site measurement, and improve system maintenance efficiency.

Strong environmental adaptability: The system design takes into account various harsh environmental factors, ensuringStay safe in extreme weather conditionsIt can still work stably under gas conditions and provide reliable monitoring data.

Openness and Scalability: The system adopts an open communication protocol, which facilitates the development of secondary data, and supports the external connection of multiple grounding circulation sensors to meet the monitoring needs of cable lines of different scales.

The online monitoring system for the circulating current of high-voltage cable sheath provides strong guarantee for the safe operation of power cables with its precise structural design and powerful functional characteristics.