Multifunctional intelligent monitoring cable and online monitoring method
By setting a continuous linear conductive monitoring structure inside the cable, the problems of difficult fault location and misjudgment by high-end equipment in traditional cables are solved, realizing low-cost, all-weather online monitoring and meeting the needs of intelligent power grid management.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 周雄
- Filing Date
- 2026-03-22
- Publication Date
- 2026-05-29
AI Technical Summary
Traditional power cables are not visible during operation, making fault location difficult. Existing detection methods cannot achieve continuous online monitoring and early warning, and high-end equipment is expensive and prone to misjudgment, failing to meet the needs of intelligent power grid management.
A continuous linear conductive monitoring structure is installed inside the cable, including metal conductors, multi-strand strands, conductive fibers, conductive coatings, etc., to form an independent detection circuit. Fault early warning is achieved by monitoring resistance and insulation resistance, and a redundant design is adopted to avoid false alarms. Temperature-sensitive materials are integrated for distributed temperature measurement and partial discharge monitoring.
It enables low-cost, all-weather online multi-parameter monitoring of live cables, reduces operation and maintenance costs, and improves the reliability and coverage of monitoring, making it suitable for the entire life cycle management of cables.
Smart Images
Figure FT_1 
Figure FT_2
Abstract
Description
Technical Field
[0001] This invention relates to the field of intelligent cable monitoring technology, specifically to a multifunctional intelligent monitoring cable and online monitoring method that can be used in low-voltage power distribution, photovoltaic energy storage, urban power grids and 110kV high-voltage transmission systems. Background Technology
[0002] Traditional power cables are not visible during operation, making fault location difficult and time-consuming, and easily causing power outages. Current cable testing mainly relies on factory withstand voltage tests and insulation resistance tests, which can only determine overall compliance and cannot identify early local defects. Operational methods often rely on leakage current protection, manual inspections, or segmented checks, failing to achieve continuous online monitoring and early warning.
[0003] High-end monitoring equipment, such as pulse reflectometers and partial discharge detectors, is costly and requires power-off operation, making large-scale deployment difficult. Existing cables with monitoring lines have limited functionality, typically only detecting continuity, and the monitoring lines themselves are prone to breakage, leading to false alarms and insufficient reliability. Furthermore, existing technologies are largely limited to traditional metal conductors and do not protect new structures such as co-extruded conductive lines, printed circuits, and conductive coatings within the insulation or sheath. These features are easily circumvented, failing to meet the power grid's requirements for intelligent, full-lifecycle cable management. Summary of the Invention
[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a multifunctional intelligent monitoring cable and online monitoring method. By setting a continuous linear conductive monitoring structure inside the cable, it can achieve low-cost, all-weather, live online multi-parameter monitoring, while solving the problem of false alarms. It also provides forward-looking coverage of various monitoring structure forms, with a wide protection range and strong practicality.
[0005] The technical solution of this invention is as follows: A multifunctional intelligent monitoring cable includes a cable body, with at least one set of transmission cores inside the cable body, and at least one continuous linear conductive monitoring structure integrated inside the cable body; the structure includes one or more of the following: metal conductor, multi-strand strand, conductive fiber, conductive colored wire, conductive coating, conductive strip, printed conductive line, colored conductive mark, which can be set inside the cable body, inside the insulation layer, inside the sheath layer, or between layers.
[0006] The linear conductive monitoring structure forms an independent detection loop, which can identify and locate broken wires by detecting its resistance and continuity status; and can provide early warning of faults such as insulation damage, leakage, moisture, and water ingress by monitoring its insulation resistance and leakage current with the transmission core.
[0007] As a preferred option, a dual monitoring structure can be set up to form redundancy, and a cable fault can only be determined when multiple monitoring structures are abnormal at the same time, thus avoiding false alarms caused by the breakage of a single monitoring structure.
[0008] The monitoring structure can use temperature-sensitive, piezoelectric, or strain-sensitive materials to further realize distributed temperature measurement, partial discharge monitoring, sheath circulating current monitoring, and external force damage monitoring. It can also integrate an identification unit to realize cable identification and full life cycle management.
[0009] This invention can monitor online 24 hours a day under energized conditions without the need for high-end instruments. It is suitable for factory defect screening and long-term operation and maintenance early warning, and is compatible with all voltage levels from low voltage to 110kV. Beneficial effects
[0010] 1. A single linear structure enables integrated monitoring of multiple parameters, covering functions such as breakpoint location, insulation, leakage current, temperature measurement, partial discharge, and protection against external damage, which is far superior to traditional single-function monitoring lines.
[0011] 2. Achieve truly low-cost, 24 / 7 online monitoring without power outages or expensive equipment, significantly reducing operation and maintenance costs.
[0012] 3. The redundant structure design solves the problem of false alarms due to self-disconnection of the monitoring line at its root, and the reliability is greatly improved.
[0013] 4. The protection range covers various forms such as wires, conductive colored wires, printed circuits, and coatings, making it difficult to circumvent.
[0014] 5. It is applicable to both factory testing and operation and maintenance, enabling full life-cycle management of cables.
[0015] 6. Adaptable to all voltage levels from low voltage to 110kV, fully meeting the needs of smart cable monitoring in power grids. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the cable cross-section structure of the present invention; Figure 2 This is a schematic diagram of the overall cable and monitoring device connection of the present invention.
[0017] Figure label: 1—Cable sheath; 2—Insulation layer; 3—Transmission core; 4—Linear conductive monitoring structure; 5—Filling structure; 6—Cable body; 7—External monitoring device. Detailed Implementation Example
[0019] A metal conductor is installed inside the cable as a linear conductive monitoring structure. An external monitoring device detects its continuity and resistance changes in real time to locate the break point. At the same time, it monitors the insulation resistance between the conductor and the transmission core to provide early warning of leakage, moisture, and insulation damage. Example
[0020] A conductive colored line is co-extruded into the insulation layer, which appears as an identification strip and has an internal conductivity monitoring function. It does not occupy extra space and enables the monitoring of wire breakage and insulation faults. Example
[0021] A conductive line is printed on the inner layer of the sheath as a monitoring structure to detect the integrity of the sheath, external pressure and damage, and to monitor the insulation status. Example
[0022] The system employs a redundant dual-monitoring structure. If one of the monitoring structures breaks unexpectedly, the system will only indicate an anomaly without determining a cable fault, thus avoiding false alarms. Example
[0023] The monitoring structure uses temperature-sensitive conductive materials to achieve distributed monitoring of cable temperature, and also has partial discharge induction characteristics, which can provide early warning of insulation degradation risks. Example
[0024] During the production phase, this cable undergoes localized defect detection through structural monitoring, and during the operation phase, it achieves 24-hour online monitoring, covering the entire lifecycle management.
[0025] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection. Any simple substitutions or modifications made based on the basic concept of the present invention, in terms of structural form, material selection, or layout, shall fall within the scope of protection of the present invention.
Claims
1. A multifunctional intelligent monitoring cable, comprising a cable body, wherein at least one set of transmission cores is disposed within the cable body, characterized in that, At least one continuous linear conductive monitoring structure is integrated within the cable body; the linear conductive monitoring structure includes one or more of the following: metal conductor, multi-strand strand, conductive fiber, conductive colored wire, conductive coating, conductive strip, printed conductive line, and colored conductive mark; the monitoring structure can be located inside the cable body, inside the insulation layer, inside the sheath layer, or between layers.
2. The cable according to claim 1, characterized in that, The linear conductive monitoring structure forms an independent detection circuit, used to detect cable breakage, damage, insulation deterioration, and abnormal conduction.
3. The cable according to claim 1, characterized in that, By detecting the resistance and circuit continuity of the linear conductive monitoring structure, cable fault diagnosis and break point location can be achieved.
4. The cable according to claim 1, characterized in that, The linear conductive monitoring structure is insulated from the transmission core. By detecting the changes in insulation resistance and leakage current between the two, it can monitor the insulation damage, leakage, moisture and water ingress.
5. The cable according to claim 1, characterized in that, The linear conductive monitoring structure adopts a multi-strand twisted form, and its mechanical strength is matched with that of the transmission core to reduce the probability of its own breakage.
6. The cable according to claim 1, characterized in that, Two or more linear conductive monitoring structures can be installed inside the cable to form redundancy; the cable body is only judged to be faulty when multiple monitoring structures are abnormal at the same time, and a single abnormality only indicates the circuit status, so as to avoid false alarms and missed alarms.
7. The cable according to claim 1, characterized in that, Linear conductive monitoring structures can use temperature-sensitive materials or fiber optic composite structures to achieve distributed temperature monitoring; they can collect partial discharge pulse signals to achieve early warning of insulation degradation; they can be used in conjunction with cable metal shielding or metal sheath to achieve sheath circulating current and grounding current monitoring; and they can have strain or vibration sensing capabilities to achieve monitoring of mechanical extrusion, bending and external force damage.
8. The cable according to claim 1, characterized in that, The linear conductive monitoring structure can integrate an identification unit to achieve cable identification and full life cycle traceability, and can be connected to external monitoring devices to realize alarm, data upload and remote online monitoring.
9. The cable according to claim 1, characterized in that, The transmission core is one or more combinations of power core, control core, and signal core.
10. The cable according to claim 1, characterized in that, The cable enables low-cost online monitoring, continuously monitors the condition and provides fault warnings while energized, and is compatible with all voltage levels from low voltage to 110kV.