A strong and weak electric coexistence global transmission system based on power frequency magnetic field synchronous coupling and a control method thereof

Abstract

This invention discloses a full-domain transmission system and control method based on synchronous coupling of power frequency magnetic field and strong and weak current signals, belonging to the field of power and communication convergence technology. The system adopts a strong-master, weak-slave transmission paradigm, using power frequency strong current as the sole synchronization reference, with weak current signals following the power frequency magnetic field for synchronous coupling transmission. The core carrier is a five-layer coaxial cable, consisting of, from the inside out, a strong current conductive core, a low-conductivity uniform field multifunctional metal composite layer, an inner insulating medium, a weak current conductive layer, and an outer insulating sheath. The composite layer enhances the power frequency magnetic field and provides electromagnetic isolation, while the insulation structure ensures complete electrical isolation between strong and weak currents. The system is divided into a three-level architecture: central control level, hub level, and terminal level, covering the entire link from the power grid backbone to community distribution and home access. The home terminal uses a wall panel with an integrated wireless module for seamless roaming throughout the house. A dual-path current anomaly monitoring and automatic isolation unit is deployed hierarchically throughout the entire link, distinguishing between equipment surges and leakage faults, enabling early warning of weak current anomalies and hierarchical isolation of strong current faults. In home scenarios, precise isolation and power outage can be achieved in a single room. This system can be smoothly expanded from home scenarios to the national power grid, relying on the existing power grid to build a backup communication network, with simple wiring, high security, and low overall cost.

Description

Technical Field

[0001] This invention belongs to the field of convergence and intersection of power transmission and communication technologies. It specifically relates to a whole-domain integrated transmission system and its closed-loop control method that uses high-voltage power as the energy core and synchronization benchmark, low-voltage signals follow the coupling at the same frequency, magnetic field symbiotic gain, built-in hierarchical safety monitoring and automatic isolation mechanism, and can be smoothly expanded from a single panel in a household to the national power grid level. It is particularly suitable for scenarios such as whole-house intelligence, ultra-wideband indoor coverage, community power distribution communication integration, urban power grid communication integration, national-level emergency backup communication, and all-domain signal protection without dead zones. Background Technology

[0002] Currently, global power supply and data communication rely on two completely independent, physically separate, and mutually shielded technological systems. Humanity has laid billions of kilometers of power lines, permeating every town, building, and room; these lines themselves are natural, globally interconnected physical carriers. However, existing technological systems choose to lay a separate network of fiber optics, copper cables, and base stations to meet communication needs, resulting in repetitive construction, compounded costs, and incomplete coverage.

[0003] The root of this contradiction lies in the technological inertia of "strong and weak currents must be separated" formed over a century. In the early days of alternating current, communication signals were highly susceptible to electromagnetic interference from power lines. As a result, the industry developed a design tradition of physically isolating power and communication, which was solidified into a standard specification in subsequent technological evolution. However, this inertia did not fundamentally demonstrate whether the power frequency magnetic field of power lines can only be shielded as an interference source and cannot be transformed into an auxiliary carrier of communication signals.

[0004] In existing buildings and infrastructure, the problem of redundant wiring caused by the separation of strong and weak current lines is particularly prominent. Within a building, various weak current systems, such as fire protection lines, security monitoring lines, cable TV lines, communication network lines, and building intercom lines, all require separate, independent wiring. Each type of line requires separate trenching, conduit installation, and maintenance. Construction teams lay the wiring layer by layer and section by section, resulting in long construction periods, high labor costs, and significant material consumption. Within homes, power lines and communication networks are completely separated. During renovations, power lines and network cables must be laid separately, requiring two types of cables, two types of panels, and two types of construction standards, leading to compounded material and labor costs. Larger homes also require the deployment of multiple routers or repeaters to achieve whole-house signal coverage, further increasing equipment procurement costs. Wireless routers are typically placed in the living room, where the signal weakens significantly after passing through multiple walls, often resulting in weak or non-existent signals in distant bedrooms, bathrooms, and kitchens.

[0005] Furthermore, a core engineering concern regarding the shared power and data transmission cables is leakage safety. In traditional separate cables, high-voltage leakage cannot be detected in time, often only being discovered after a fire or equipment damage. Community power distribution lines are spread throughout residential buildings, and household wiring is closely integrated into daily life; a high-voltage leakage failure can have extremely serious consequences. Traditional household circuits rely on residual current devices (RCDs) in the inlet distribution box, which have slow response times and low location accuracy; once triggered, they trip the entire circuit breaker, failing to isolate the fault within a single room. Therefore, shared cable transmission systems must incorporate a built-in safety mechanism capable of automatically detecting, providing tiered warnings, and accurately isolating leakage. This mechanism should extend down to the inlet and room levels to achieve the smallest possible fault containment area.

[0006] This invention proposes a novel transmission paradigm: power and communication are not inherently opposed, but can coexist in the same cable, share the same gain, and operate synchronously. Furthermore, it achieves higher safety and reliability than traditional separate cables through a built-in hierarchical safety monitoring mechanism. Specifically, existing technologies suffer from the following six fundamental deficiencies.

[0007] First, the separate laying and duplication of power and communication lines result in high construction costs and significant resource consumption. From the national power grid to community distribution and into homes, the entire line is separated into two tracks, resulting in a massive number of pipelines and a heavy burden of construction and maintenance.

[0008] Second, traditional power line carrier communication simply superimposes and couples data signals onto power lines without achieving magnetic field synchronization and energy synergy. It is susceptible to power load fluctuations, has low transmission rate, poor stability, and high latency, and cannot support the needs of high-computing-power terminals and ultra-wideband communication.

[0009] Third, wireless communication relies on multi-level base station hopping and over-the-air radio frequency transmission, which has inherent bottlenecks such as large attenuation when penetrating walls, many coverage dead zones, easy disconnection in extreme scenarios, bandwidth congestion, and severe multipath interference. Home WiFi signals are also susceptible to interference from neighboring routers, microwave ovens, and other devices operating on the same frequency, resulting in channel congestion and large latency fluctuations.

[0010] Fourth, existing technologies all regard the power frequency electromagnetic field generated by high-voltage operation as a harmful interference source and only use passive shielding, isolation and filtering methods to deal with it. They completely fail to utilize the natural magnetic field of high voltage to support, synchronize and couple weak voltage signals, resulting in a huge waste of physical carriers and energy fields.

[0011] Fifth, the national-level communication network relies excessively on terrestrial base stations and satellite networking, resulting in extremely high construction and maintenance costs. It lacks a fundamental communication system that relies on the national power grid, is uninterrupted, provides full coverage, is accessible to all citizens, and is resistant to interference and destruction.

[0012] Sixth, existing technologies lack a safety mechanism capable of real-time monitoring of leakage anomalies, tiered early warning, and automatic isolation during the transmission of both strong and weak current cables. Furthermore, there is a lack of technical solutions to extend this mechanism down to the entry-level and room-level, achieving precise fault isolation in individual rooms. This is one of the key reasons why the engineering implementation of shared strong and weak current cables has been hindered for so long.

[0013] This invention proposes a complete closed-loop, logically self-consistent, progressively expandable, and compatible system for smooth upgrades from existing systems, with built-in hierarchical security monitoring and automatic isolation mechanisms for the coexistence of strong and weak current transmission. It fundamentally solves core industry problems such as transmission attenuation, incomplete coverage, cabling redundancy, communication interruption, excessive construction costs, and shared cable security. Summary of the Invention

[0014] 3.1 Purpose of the Invention This invention aims to establish a novel transmission paradigm with strong current as the core rigidity and weak current as the external flexibility, combining rigidity and flexibility, clearly defining master and servant relationships, and synchronous symbiosis. This completely overturns the century-old, inherent technological path of mutual isolation, avoidance, and shielding between strong and weak currents. It achieves end-to-end power supply and data communication across the entire chain, from the national backbone power grid to community distribution networks to interior wall panels in homes, with simultaneous cable transmission, gain, synchronous operation, no interference, and secure electrical isolation. By embedding hierarchically deployed dual-path current anomaly monitoring and automatic isolation units at both ends of each cable segment, it achieves full-level safety protection from the national backbone network to community distribution networks to the room level in homes—hierarchical early warning for weak current anomalies, precise isolation of leakage current breakdown at the strong current layer, and containment of faults to the minimum extent at the entry point and panel levels. It constructs a fully compatible system that can smoothly expand from a single household and single panel to buildings, communities, cities, and the national power grid, without disruptive modifications or interruptions to existing public services, and can naturally complete nationwide upgrades along with the iteration of aging power grid lines. This will form a three-tiered, three-dimensional, all-encompassing communication network with the power grid backbone at its core, base stations providing spatial reinforcement, and satellites serving as extreme backup. The ultimate vision of this invention is to ensure stable, secure, and universally covered communication signals wherever there is electricity, making the power grid itself the nation's most reliable information lifeline, and turning every wall panel into an information gateway.

[0015] 3.2 The Formation Process of Technical Ideas and Underlying Design Principles The technical concept of this invention stems from a fundamental question: since power lines are natural, ubiquitous physical carriers, why can't energy transmission and data communication be completed simultaneously on the same cable? If so, how can we ensure the safety of every segment of the shared cable transmission from the national power grid to a household room? Step 1: The separation of strong and weak electricity is not a physical law, but a historical choice. The inventors discovered that in the early days of alternating current (AC), communication signals were highly susceptible to electromagnetic interference from power lines, leading to a design tradition of physically isolating power and communication signals. This tradition solidified into standard specifications in subsequent technological evolution. However, this inertia did not fundamentally demonstrate whether the power frequency magnetic field of power lines could only be shielded as an interference source and could not be converted into an auxiliary carrier for communication signals. The inventors thus established a fundamental technical judgment: the separation of strong and weak currents is not a mandatory requirement of physical laws, but rather a technological compromise at a specific historical period. With the development of insulation material technology, electromagnetic coupling technology, and signal processing technology, the historical conditions for re-examining this century-old tradition have matured.

[0016] Step Two: Redefining the Power Frequency Magnetic Field – A Cognitive Reversal from “Interference Source” to “Reference Source” Traditional systems characterize strong power frequency magnetic fields as electromagnetic interference to communication systems, employing passive shielding, isolation, and filtering to mitigate them. The inventors, however, took a reverse approach. Power frequency magnetic fields possess numerous inherent advantages: frequency stability, full coverage, immunity to building obstruction, and strong penetration. If this naturally occurring stable magnetic field could be used as a synchronization reference and energy source for weak electrical signals, the power grid itself could become a communication carrier spanning the entire area, eliminating the need for a separate transmission channel. Therefore, the inventors established the core design principle of "strong current as the reference, weak current as the follower, and magnetic field as the link."

[0017] Step 3: Physical structure deduction of symbiotic cables – internal rigidity and external flexibility, electrical isolation, and interconnected and enhanced magnetic fields. After establishing the core design principles, the inventors faced the challenge of translating these principles into a concrete physical structure. The cable structure needed to simultaneously meet four requirements: complete electrical isolation between strong and weak currents to eliminate the risk of crosstalk and leakage; the power frequency magnetic field generated by the strong current operation could not merely passively penetrate to the weak current layer, but also needed to be actively regulated and enhanced to provide a stronger coupling field source for the weak current signal; electromagnetic interference generated on the strong current side must be confined to the side close to the core wire, preventing it from spreading outwards and affecting the transmission of the weak current signal; and both sides should share the same physical carrier to reduce laying costs and space occupation. The inventors designed a coaxial symbiotic cable with an inner strong and outer weak current core as the core transmission carrier, and added a low-conductivity, uniform-field, multifunctional metal composite layer between the strong current conductive core and the inner insulating medium to achieve the convergence, homogenization, directional enhancement, and electromagnetic isolation of the power frequency magnetic field.

[0018] Step 4: Three-Tier Full-Level Connectivity Architecture – A Comprehensive Deduction from the National Backbone Network to Home Wall Panels After determining the cable structure, the inventors further deduced the signal transmission architecture across the entire network. After being injected into the State Grid hub, the signal experiences attenuation and phase shift over long distances, requiring pickup, calibration, amplification, and re-injection at intermediate nodes. Based on this, the inventors designed a three-tiered, fully interconnected architecture: a central control level, a hub level, and a terminal level. The central control level corresponds to the high-voltage backbone transmission segment of the power grid, the hub level corresponds to the community distribution transmission segment, and the terminal level corresponds to the end-user transmission segment. These three links are seamlessly connected and follow a unified set of rules. The hub level utilizes natural nodes such as community transformers and building distribution boxes to deploy relay amplification equipment. The terminal level upgrades each wall socket panel into a composite terminal for signal transmission and reception and wireless coverage, with multiple panels working together to form a seamless roaming network throughout the house.

[0019] Step 5: Building a security monitoring mechanism – tiered deployment and precise isolation After completing the transmission architecture simulation, the inventors faced one final core problem: how to ensure the safety of every segment of the shared cable transmission from the national backbone network to individual homes. In traditional separate cables, high-voltage leakage cannot be detected in time, and household leakage protection switches can only trip the entire house, failing to pinpoint the exact location. Inspired by the applicant's prior research in metering supervision and intervention systems, the inventors transferred the core logic of dual-path independent data acquisition, dual-reference anchoring, and cross-arbitration judgment to the safety monitoring of shared cables. More importantly, the inventors deployed this safety mechanism in a tiered manner: monitoring units deployed in the central control and hub-level equipment are responsible for the safety of the backbone network and community distribution network; monitoring units deployed in the in-home distribution box are responsible for the safety of the in-home bus segment; and miniature monitoring units deployed in each wall panel terminal are responsible for the safety of their respective branch lines within their room. When a high-voltage leakage breakdown occurs in a room, only the panel terminal in that room triggers a secondary emergency isolation, cutting off the branch lines in that room, while other rooms maintain normal power supply and communication, achieving precise fault isolation in a single room and preventing a complete house trip.

[0020] Step 6: Smooth Expansion and Gradual Replacement – ​​Design Boundaries for Compatibility with Existing Systems After completing the simulation of the core architecture and security mechanisms, the inventors clarified the engineering deployment principles of this system: avoid a one-size-fits-all approach, avoid disruptive modifications, and avoid interrupting existing residential power supply. The system can be gradually replaced with coexisting cables as the aging power grid lines naturally iterate. During home renovations, only coexisting cables need to be laid and corresponding panels installed during routine circuit construction; no additional network cables or routers are required. Existing operator base stations can be retained as spatial signal reinforcement nodes, and satellite communication can be reserved as a backup for extreme scenarios. Ultimately, a three-tiered, multi-path redundant, and uninterrupted national-level communication network will be formed, with the power grid backbone as the core, base stations as spatial reinforcement, and satellite as an extreme backup. Under this system, existing communication operators not only do not need to replace their core equipment, but can also expand new business growth opportunities by participating in the joint research and development and production of coexisting cables and coupling / decoupling devices.

[0021] 3.3 Core Technology Solution 3.3.1 Underlying Core Principles This invention strictly follows the rigid-flexible master-slave underlying rules that cannot be reversed, cannot be reversed, and cannot be disrupted, with a clear physical mechanism and a complete logical closed loop.

[0022] High-voltage electricity serves as the core, the reference, and the anode: it is the energy source, the global synchronous clock, and the core of operation for the entire system. Its voltage, current, power frequency, and load conditions are completely unaffected by any disturbance, influence, or change from low-voltage signals, and it always maintains the standard operating state of the power grid.

[0023] Low voltage is externally flexible, subordinate, coupled, and cathode: it fully follows the real-time voltage, current, flow rate, and power frequency fluctuations of high voltage for dynamic synchronization, phase calibration, and amplitude adaptation, always maintaining the same frequency and direction and synchronous fluctuations, eliminating phase cancellation and electromagnetic interference from the source, and never generating reverse disturbances.

[0024] Electrical isolation, magnetic field interconnection and enhancement: Complete electrical isolation between strong and weak currents is achieved through a dedicated physical insulation layer, completely eliminating the risks of cross-current, leakage current, and electric shock. At the same time, a low-conductivity homogenizing multifunctional metal composite layer concentrates, homogenizes, and directionally enhances the power frequency magnetic field generated by strong currents, forming a controllable magnetic field with higher energy density and more concentrated direction, providing a stronger coupling field source and continuous unidirectional transmission gain for weak current signals.

[0025] Full-area carrier, power-as-network: The entire power transmission line also serves as a data communication transmission carrier, from the national backbone power grid to the community power distribution network to the indoor wall panels of homes. There is no need for multi-level hopping at base stations or satellite relays. The signal extends throughout the entire power grid, and the transmission path is continuous and stable, significantly reducing transmission loss and multipath interference, and achieving full coverage without dead zones.

[0026] 3.3.2 Symbiotic Cable Structure To achieve the aforementioned underlying principle, this invention employs a coaxial cable with an inner high-voltage and an outer low-voltage conductive layer as the core transmission carrier. This cable has a coaxial composite structure, consisting of, from the inside out, a high-voltage conductive core, a low-voltage conductive multi-functional metal composite layer, an inner insulating dielectric layer, a low-voltage conductive layer, and an outer insulating sheath, all coaxially nested. Each structural layer is arranged coaxially and concentrically, with tight interlayer bonding, forming an integrated cable body.

[0027] The high-voltage conductive core is located at the center of the cable and is made of highly conductive copper material. It undertakes the main power transmission function and generates an alternating magnetic field and working current during operation.

[0028] A low-conductivity, uniform-field, multifunctional metallic composite layer is coated around the periphery of a high-electric-conducting core, forming a special alloy composite structure with magnetic field modulation, power frequency field enhancement, and electromagnetic isolation characteristics. This structure concentrates, homogenizes, and directionally enhances the power frequency magnetic field generated by the high-electric-conducting core, precisely constraining the magnetic field distribution range. Simultaneously, it completely confines the alternating magnetic field and electromagnetic clutter from the high-electric side within this layer, blocking the outward transmission of electromagnetic interference. This layer does not participate in electrical conduction, maintains stable physicochemical properties at its interface with the adjacent insulating medium, and collaboratively constructs a graded insulation protection system, exhibiting extremely low temperature rise during operation.

[0029] The inner insulating layer, sandwiched between the low-conductivity uniform-field multifunctional metal composite layer and the weak-current conductive layer, serves as a high-voltage insulating layer. It achieves electrical and physical isolation between the high-voltage and low-voltage functional areas, preventing direct conduction between high and low potentials and enhancing the layered insulation capability. It is the core insulating component for separating high and low voltage zones. A stable interface structure is formed between this inner insulating layer and the low-conductivity uniform-field multifunctional metal composite layer. The low-heat generation characteristics of the composite layer reduce insulation aging caused by temperature changes, indirectly extending the service life of the insulation system. This inner insulating layer exhibits high penetration into the enhanced magnetic field, regulated by the low-conductivity uniform-field multifunctional metal composite layer, allowing the magnetic field to couple efficiently to the weak-current conductive layer.

[0030] The low-voltage conductive layer is arranged outside the inner insulating medium and adopts a high-conductivity metal braided mesh or metal foil wrapping structure, independently forming a low-voltage transmission channel for signals and communications. Relying on the dual protection of the inner insulating medium and the low-conductivity uniform field multifunctional metal composite layer, this low-voltage conductive layer stably transmits low-voltage signals in an environment free from electromagnetic interference. At the same time, it is subjected to the continuous unidirectional coupling effect of the regularized and enhanced power frequency magnetic field, effectively compensating for transmission losses.

[0031] The outer insulating sheath covers the outermost layer of the weak current conductive layer, forming the overall outer protective insulation structure of the cable. It isolates the cable from external environmental moisture, dust, and external force damage, while also providing external insulation and preventing leakage. Together with the internal multi-layer insulation structure, it forms a comprehensive insulation protection system.

[0032] 3.3.3 Three-Tier Full-Level System Architecture This system consists of three levels of nodes: central control, hub, and terminal. From top to bottom, the rules are unified, synchronized, rigid and flexible, and collaborative across the entire domain. The three levels of nodes correspond to complete transmission links from top to bottom: the central control level corresponds to the high-voltage backbone transmission segment of the power grid, the hub level corresponds to the community distribution transmission segment, and the terminal level corresponds to the end-user transmission segment. These three links are seamlessly connected and governed by unified rules.

[0033] The central control level uses the power grid's central dispatch hub and step-up substations as core nodes, corresponding to the high-voltage backbone transmission section of the power grid. The central control level deploys centralized synchronous coupling main control equipment, which includes a power frequency reference locking module, a data signal modulation module, and a strong electromagnetic field coupling injection module. The power frequency reference locking module collects voltage, current, power frequency fluctuations, and power parameters of the high-voltage circuit in real time, generating a unified synchronous clock for the entire region. The data signal modulation module uses this synchronous clock as a reference to modulate the communication data signal to be transmitted into a signal with the same frequency as the fundamental frequency of the high-voltage power line or its integer multiples of harmonics, ensuring that the weak current signal and the high-voltage power frequency magnetic field always maintain a state of coupling in the same direction. The strong electromagnetic field coupling injection module injects the modulated weak current signal into the weak current conductive layer of the symbiotic cable through a non-contact magnetic field coupling method, forming a nationally unified, frequency-consistent, and phase-synchronized underlying communication backbone network.

[0034] The hub-level distribution system uses regional hub substations, regional main substations, community transformers, distribution rooms, building distribution boxes, and transformer substations as relay nodes, corresponding to the community power distribution transmission segment. The hub-level system deploys regional synchronization amplification and coupling equipment, which includes a line signal acquisition module, a signal synchronization enhancement module, and a magnetic field coupling re-injection module. The line signal acquisition module non-contactly picks up weak electrical signals from the weak electrical conductive layer of the coexisting cable. The signal synchronization enhancement module performs synchronization calibration, waveform shaping, and power enhancement on the acquired signal, eliminating the attenuation and distortion accumulated during transmission. The magnetic field coupling re-injection module re-injects the enhanced signal into the weak electrical conductive layer of the next coexisting cable segment via magnetic field coupling, maintaining network-wide frequency uniformity, phase synchronization, and signal direction consistency.

[0035] In the community power distribution transmission segment, the hub-level equipment is specifically deployed as community-level synchronization coupling equipment and building-level relay amplification equipment. The community-level synchronization coupling equipment is deployed at the community transformer node, receiving signals from the upstream source and performing synchronization calibration using the community transformer's power frequency as the local reference before injecting them into the community power distribution network. The building-level relay amplification equipment is deployed at the distribution box node of each building, non-contactly picking up signals from the distribution lines, performing synchronization calibration and reinforcement, and then re-injecting them into the distribution lines of each unit in the building for transmission to each floor and household's entry point.

[0036] The terminal level utilizes building-level centralized power distribution equipment, household power distribution equipment, in-home distribution boxes, wall socket terminals, and intelligent receiving devices as terminal carriers, corresponding to the in-home end transmission segment. The terminal level deploys plug-and-play terminal equipment, which includes a line signal coupling pickup module, a synchronization calibration module, a signal synchronization enhancement module, a wired reinjection module, and a spatial wireless coverage module. The line signal coupling pickup module non-contactly picks up weak current signals from the weak current conductive layer of the coexisting cable. The synchronization calibration module performs frequency and phase calibration on the signal. The signal synchronization enhancement module enhances the power of the calibrated signal. The wired reinjection module recouples the enhanced signal back to the line-enhanced full-domain transmission. The spatial wireless coverage module converts the signal into a standard spatial wireless signal. A terminal decoupling unit is installed at the terminal to completely separate the long-term coexisting power frequency and weak current signals. Power is connected to the terminal's electrical load, and weak current signals are connected to the terminal's signal equipment, completing the entire link transmission operation.

[0037] At the end-of-home transmission segment, the terminal-level equipment is specifically deployed as an in-home signal access and distribution device and a panel-type signal reinforcement and coverage module. The in-home signal access and distribution device is installed at the in-home distribution box, non-contactly picking up weak electrical signals from the in-home co-current cable and distributing them to branch lines in each room. The panel-type signal reinforcement and coverage module is embedded inside the wall socket panel of each room, forming a single panel structure. It non-contactly picks up signals from the branch line in its room, synchronously calibrates using the in-home power frequency as a reference, reinforces the signal, and then transmits it back along the line, while converting it into a standard spatial wireless signal to cover the corresponding room. Multiple room panels work collaboratively; as the terminal device moves between rooms, it automatically switches to the panel with the strongest signal, achieving seamless roaming coverage throughout the house. Each wall panel is a miniature wireless transceiver terminal; the signal reaches every room along with the power lines, eliminating wall attenuation and coverage dead zones.

[0038] 3.3.4 Coupling and Decoupling Devices To achieve non-contact coupling injection and separation analysis of power frequency electrical energy, power frequency magnetic field, and weak current signals at various nodes, this system is equipped with a dedicated coupling and decoupling device. The device adopts a docking cavity structure with tapered docking ports at both ends and the core coupling working area in the middle.

[0039] The tapered docking port is used to achieve a sealed coaxial connection with the aforementioned strong and weak current coexisting cables, ensuring that the coaxial shape remains unchanged after the cable is inserted, maintaining the original transmission mode of the magnetic and electric fields. The central core coupling working area is the energy and signal interaction region. Relying on the power frequency magnetic field enhanced by the low-conductivity uniform field multifunctional metal composite layer inside the cable, it completes the coupling loading of weak current signals; or decouples and separates synchronously transmitted power and signals, realizing independent separation of power and signal paths. The entire device has the characteristics of sealing, insulation, and magnetic circuit sealing, with no electromagnetic leakage after docking, ensuring a safe and stable interaction process.

[0040] Coupling / decoupling devices are required at all levels of nodes, including the central control level, hub level, and terminal level. At the central control level, this device couples the modulated low-voltage signal into the low-voltage conductive layer of the symbiotic cable. At the hub level, this device picks up signals from the cable, reinforces them, and then injects them into the next cable segment, while also decoupling signals as needed. At the terminal level, the terminal decoupling unit is the low-voltage termination form of the coupling / decoupling device, used to completely separate power and signals and connect them separately to the electrical load and signal equipment.

[0041] 3.3.5 Hierarchically Deployed Dual-Path Current Anomaly Monitoring and Automatic Isolation Unit In normal operation, high-voltage and low-voltage co-current cables maintain complete electrical isolation between the high-voltage conductive core and the low-voltage conductive layer, allowing each to operate independently without interference. However, when the inner insulation layer develops insulation defects due to aging, damage, external force, or improper installation, high-voltage current may break through the insulation layer and enter the low-voltage conductive layer, causing equipment burnout, fire, or even electric shock. In traditional separate cables, such leakage often goes undetected. Community power distribution lines are ubiquitous in residential buildings, and household wiring is closely integrated into daily life; a high-voltage leakage breakdown can have extremely serious consequences. Traditional household circuits rely on residual current devices (RCDs) in the distribution box, which have slow response times and low positioning accuracy; once triggered, the entire house trips, failing to isolate the fault within a single room.

[0042] To address this core safety hazard, this invention integrates dual-path current anomaly monitoring and automatic isolation units at both ends of each coexisting cable segment, and deploys them hierarchically according to node level. The main control-level synchronous coupling equipment and the hub-level regional synchronous amplification and coupling equipment integrate backbone-level and community-level monitoring and isolation units. The in-home distribution box integrates an in-home level monitoring and isolation unit responsible for monitoring the safety status of the in-home bus segment. Each wall panel terminal integrates a panel-level miniature monitoring and isolation unit, each independently responsible for the safety status of its own room's branch lines.

[0043] Each dual-path current anomaly monitoring and automatic isolation unit consists of five parts: a high-voltage side current acquisition module, a low-voltage side signal acquisition module, a factory reference storage module, a cross-comparison arbitration module, and a graded response execution module.

[0044] The high-voltage side current acquisition module acquires the current amplitude, waveform characteristics, and rate of change of the high-voltage conductive core in real time through a non-contact current transformer. The low-voltage side signal acquisition module acquires the signal amplitude, frequency characteristics, and waveform changes of the low-voltage conductive layer in real time through a non-contact magnetic field coupling method. Both modules acquire data independently, are powered independently, and do not interfere with each other. Both the high-voltage side current acquisition module and the low-voltage side signal acquisition module employ a multi-channel redundant sampling backup mechanism. Each acquisition module integrates at least three independent sampling channels, each with independent power supply, independent acquisition, and independent output. The cross-comparison arbitration module performs consistency judgment on the acquired data from each channel: when the data from the three channels are consistent, the average value is used as the judgment basis; when the data from one channel deviates from the other two by more than a preset tolerance threshold, the arbitration module determines that the channel is faulty, automatically isolates it, and switches to the remaining healthy channel to continue working, while simultaneously triggering an abnormal acquisition channel warning.

[0045] The factory-installed reference storage module performs reference calibration on both the high-voltage and low-voltage layers of the cable after installation, commissioning, and normal system operation. The calibration includes the normal current amplitude range and waveform characteristics of the high-voltage layer, and the normal signal amplitude range and frequency characteristics of the low-voltage layer. The reference data is permanently stored in the security chip, serving as the sole basis for subsequent anomaly detection.

[0046] The cross-comparison arbitration module is the core decision-making component of this unit. During normal operation, real-time data collected from the high-voltage side is compared with the factory baseline, and the real-time data collected from the low-voltage side is also compared with the factory baseline. Simultaneously, the high-voltage and low-voltage sides exchange real-time data—the high-voltage side sends its current high-voltage parameters to the low-voltage side, and the low-voltage side sends its current low-voltage parameters to the high-voltage side. Each monitoring unit simultaneously possesses three sets of information: its own real-time data, the other party's real-time data, and the factory baseline data from both sides. The cross-comparison arbitration module determines the consistency of these three sets of information.

[0047] The cross-comparison arbitration module incorporates a surge detection mechanism for extreme operating conditions. When the high-voltage side detects a sudden surge in current, but this surge matches the surge current characteristics of high-power equipment startup—that is, the current rises sharply to its peak in a very short time and then decays exponentially, and the low-voltage side does not simultaneously detect high-voltage intrusion characteristic signals—the cross-comparison arbitration module determines it as a normal power surge and does not trigger false isolation. This detection mechanism distinguishes between surges and leakage currents by comparing the synchronous change characteristics of the high-voltage and low-voltage sides: during a surge, the current on the high-voltage side changes abruptly, but the signal waveform on the low-voltage side still maintains a normal coupling relationship with the high-voltage power frequency; during leakage current breakdown, the current on the high-voltage side changes abruptly, and the signal waveform on the low-voltage side shows high-voltage power frequency intrusion characteristics, and the two lose their normal coupling relationship. Through this detection logic, false disconnection caused by high-power equipment startup can be effectively avoided, while ensuring millisecond-level response to actual leakage current breakdown.

[0048] The hierarchical response execution module executes two levels of response actions based on the judgment results of the cross-comparison arbitration module.

[0049] The first level is a low-voltage anomaly warning. When the signal parameters collected by the low-voltage side deviate from the factory reference range—such as signal amplitude attenuation exceeding a preset threshold, waveform distortion, or frequency shift—but the parameters collected by the high-voltage side remain within the normal range, and no high-voltage characteristic signals are detected from the low-voltage layer, the cross-comparison arbitration module determines it to be a low-voltage layer anomaly. This anomaly is usually caused by local damage to the low-voltage conductive layer, signal leakage, poor contact, etc., and does not affect the safety of high-voltage power supply. The graded response execution module triggers the first-level warning: it sends an alarm signal to the operation and maintenance platform or user terminal through the low-voltage conductive layer, reporting the location information of the fault section and prompting the arrangement of planned maintenance. At this time, the power supply is not cut off, ensuring normal power use.

[0050] The second level is emergency isolation for high-voltage leakage. When a sudden current change is detected on the high-voltage side, and simultaneously a sudden voltage surge, a sudden current increase, and the appearance of high-voltage characteristic signals in the waveform—that is, the power frequency current characteristics of the high-voltage conductive core appearing in the low-voltage conductive layer—the cross-comparison arbitration module determines that the high-voltage current has broken down the inner insulating medium and entered the low-voltage conductive layer. At this time, the graded response execution module triggers the second-level emergency isolation within milliseconds: this node automatically disconnects the electrical connection with the adjacent nodes on the fault side, and simultaneously sends isolation commands to downstream and upstream nodes through the low-voltage conductive layer. The upstream and downstream nodes simultaneously disconnect their corresponding connections, sealing off the faulty section within the smallest possible area and preventing the fault from spreading.

[0051] In a hierarchical deployment architecture, the isolation range precisely corresponds to the node level. When backbone and community-level units trigger isolation, the corresponding backbone or community segment is disconnected. Inbound-level units monitor the inbound bus segment and disconnect it when isolation is triggered. Panel-level units independently monitor their own room's branch lines. When a high-voltage leakage breakdown occurs in a room, only the panel terminal in that room triggers secondary emergency isolation, disconnecting the branch lines in that room. Other rooms maintain normal power supply and communication, achieving precise fault isolation in a single room and preventing system-wide tripping.

[0052] 3.3.6 Core Control Methods The present invention provides a closed-loop control method for synchronously protecting the entire system, wherein the steps are irreversible and the master-slave logic is invertible.

[0053] The first step is the reference locking process. Using the power frequency high-voltage line as the sole absolute reference, the main control-level power frequency reference locking module collects voltage, current, current velocity, power frequency fluctuation, and power tolerance parameters in real time to generate a unified synchronous clock across the entire network, ensuring that the reference of all nodes in the network is unique.

[0054] The second step is the master-slave synchronization process. Using the high-voltage synchronous clock as the core, the frequency of the low-voltage data signal is locked to the fundamental frequency of the high-voltage signal or its integer multiple harmonic frequencies. The phase and amplitude are dynamically calibrated to ensure that the low-voltage signal completely follows the high-voltage signal in the same frequency and direction, and fluctuates synchronously.

[0055] The third step is the magnetic field coupling process. A centrally controlled high-power electromagnetic field coupling injection module injects the synchronously completed low-voltage signal into the low-voltage conductive layer of the symbiotic cable through a non-contact, non-overcurrent-free, and highly electrically safe magnetic field coupling method. Utilizing the ring-shaped power frequency magnetic field generated by the high-power conductive core, and after being regularized and enhanced by a low-conductivity uniform field multifunctional metal composite layer, a continuous unidirectional energy coupling supply is provided to the low-voltage signal, offsetting line transmission losses.

[0056] The fourth step is the full-area connectivity process. The central control level, hub level, and terminal level nodes maintain the same reference, frequency, and phase. The hub level picks up, synchronously strengthens, and re-injects signals. Each level of node achieves non-contact coupling and decoupling of signals through coupling and decoupling devices. In the community power distribution transmission segment, community-level synchronous coupling equipment and building-level repeater amplification equipment relay the signal step by step. In the household terminal transmission segment, household-level signal access and distribution equipment distributes the signal to each room, and panel-type terminals pick up, calibrate, strengthen, and convert it into spatial wireless signals. This achieves conflict-free, non-cancelling, non-interference, and continuous full-area connectivity of the entire network.

[0057] The fifth step is the end-point regeneration step. At the end node, plug-and-play terminal equipment synchronously calibrates and enhances the line-coupled signal. One path is reinjected to enhance the entire transmission range, while the other path is separated by the terminal decoupling unit and connected to the terminal signal equipment, or converted into standard spatial wireless signal coverage. Panel-type terminals in each room work collaboratively, with terminal equipment automatically roaming and switching, achieving integrated and coordinated gain for wired transmission and wireless coverage throughout the house.

[0058] 3.3.7 Full-level extension rules This invention protects a smooth scaling architecture from home to the national power grid.

[0059] Home-grade: Utilizing a signal access and distribution device in the inlet distribution box, coupled with co-location cabling throughout the house and panel-type terminals in each room, it achieves stable coverage throughout the house without network cables, routers, repeaters, or dead zones. A single inlet cable handles both power supply and network communication throughout the house. Each wall panel acts as a miniature wireless transceiver, and multiple panels work together to form a seamless roaming network throughout the house. During renovation, only co-location cabling needs to be laid and corresponding panels installed during standard electrical wiring; no additional network cabling is required.

[0060] Building-level: A centralized main control system is used in conjunction with shared cabling throughout the building. Building-level repeater amplification equipment is deployed in the building's distribution box to achieve full-area signal continuity throughout the building. No floor wiring or multi-level repeaters are required; fire protection, monitoring, communication, and cable TV systems can all be transmitted through the same cable.

[0061] Community-level: Using the community transformer as the signal injection node and the distribution boxes in each building as relay nodes, this approach utilizes the existing community power distribution network and nodes, eliminating the need for additional communication lines. Construction is concentrated on installing equipment within existing power distribution rooms and boxes, resulting in minimal construction work and a short timeframe. The community-level synchronization coupling equipment and building-level relay amplification equipment employ standardized interfaces, adaptable to different community sizes, and can be quickly replicated and promoted.

[0062] City-level: By combining the replacement of symbiotic cables with the replacement of old power grid lines and the installation of coupling amplification equipment at transformer nodes, full coverage of the city can be achieved without the need for a large number of new base stations, thus significantly reducing infrastructure investment.

[0063] At the national level: The national power grid serves as the underlying communication backbone, with data from the three major telecom operators seamlessly coupled into the network. Existing base stations are transformed into space signal reinforcement nodes, and satellites are used only as backups in extreme scenarios, forming a three-layered, multi-path redundant, and uninterrupted national-level communication network. In this process, existing telecom operators not only do not need to replace their core network equipment, but can also participate in the joint R&D, production, and standardization of new equipment such as coexisting cables and coupling / decoupling devices, expanding new areas for industrial growth.

[0064] 3.4 Beneficial Effects Compared with the prior art, the beneficial effects of the present invention are reflected in the following aspects: First, it pioneers a brand-new underlying transmission system that is both rigid and flexible, combining rigidity and flexibility, with strong master and weak slave, and co-field gain, eliminating electromagnetic interference at the source rather than through passive filtering and compensation.

[0065] Second, an irreversible master-slave rule is established, with strong current absolutely dominating and weak current absolutely following. Source synchronization is achieved with strong current as the sole global benchmark. Its anti-interference capability, transmission stability, and maximum transmission distance far exceed all existing power line carrier and wireless communication technologies.

[0066] Third, a fully integrated system that can be seamlessly expanded from a single household panel to the national power grid, compatible with both civilian and commercial applications and national emergency communications. From the national backbone power grid to the community distribution network to the interior wall panels of homes, the entire chain is connected, requiring no repeated construction, no one-size-fits-all modifications, and no interruption of existing public services. It can be upgraded naturally along with the power grid.

[0067] Fourth, the shared cable transmission for power and communications replaces the traditional separate lines for fire protection, monitoring, communications, and cable TV within buildings with a single cable, significantly reducing the number of pipelines, lowering construction difficulty, and shortening the construction cycle. Within homes, there's no need to lay separate network cables or deploy routers and repeaters during renovations; only shared cables and corresponding panels need to be laid, reducing wiring complexity and equipment procurement costs. Nationwide, as aging power grid lines are naturally replaced by shared cables, there's no need for separate projects, additional land acquisition, or repeated construction, resulting in a significant reduction in overall construction costs. Existing telecommunications operators don't need to replace core equipment and can expand their business by participating in the research and development of new equipment.

[0068] Fifth, a bottom-line communication solution based on the national power grid. In extreme cases, it does not rely on base stations or satellites. As long as the power grid remains uninterrupted, it can achieve nationwide signal coverage and ensure that national commands are accessible to all citizens. Where there is electricity, there is signal; the power grid itself is the nation's most reliable information lifeline.

[0069] Sixth, it features a built-in, hierarchically deployed dual-path current anomaly monitoring and automatic isolation unit. Through a four-step closed-loop process—factory benchmark anchoring, independent dual-path acquisition, cross-comparison arbitration, and hierarchical response execution—it provides first-level early warning monitoring of weak current layer anomalies, notifying maintenance and repair without interrupting power supply. Second-level emergency isolation monitoring of strong current layer leakage current breakdown automatically cuts off the faulty segment within milliseconds, containing the fault within a minimal scope. Within the home, each panel-level unit independently monitors its own room's branch circuit. A single room leakage current only disconnects that room, while other rooms maintain normal power and communication, achieving precise fault isolation in a single room and preventing whole-house tripping. A built-in extreme condition surge discrimination mechanism effectively distinguishes between high-power device startup surges and actual leakage current breakdowns, avoiding false disconnections. The acquisition module employs a multi-path redundant sampling backup mechanism, automatically isolating and switching to the remaining healthy channel in case of a single-path failure, ensuring high reliability of the monitoring link itself.

[0070] Seventh, compared to traditional WiFi, it requires no separate wiring, has no wall penetration attenuation, and no coverage dead zones. The signal reaches every room via the power lines, and each wall panel acts as a signal transceiver terminal. Multiple panels work together for seamless roaming throughout the house, significantly improving stability and continuity. Compared to traditional power line carrier, it achieves synchronous operation from the source, eliminating load fluctuation interference. Energy replenishment is achieved through magnetic field coupling, significantly reducing transmission loss. Compared to terrestrial base stations, it eliminates the need for multi-level hopping, relay delays, and large-scale base station construction, achieving full coverage based on the existing power grid. Attached Figure Description

[0071] Figure 1 Schematic diagram of the cross-section of a high-voltage and low-voltage co-current cable; Figure 2 Schematic diagram of the structure and operation of a strong-weak electrical coupling / decoupling device; Figure 3 Schematic diagram of power transmission from the main step-up transformer to the regional hub transformer in a combined high-voltage and low-voltage cable; Figure 4 Schematic diagram of power transmission from the regional hub transformer to the district-level main transformer using a combined strong and weak current cable; Figure 5 Schematic diagram of power transmission from the district-level main transformer to the transformer in the substation using a combined strong and weak current cable; Figure 6 Schematic diagram of power transmission from transformer to terminal decoupling panel in a transformer substation with coexisting high and low voltage cables.

[0072] Attached image annotations: 1. Special low-conductivity uniform field metal composite layer; 2. High-voltage center cable; 3. Inner insulation layer; 4. Weakly conductive layer; 5. Outer insulation layer; 12. High-voltage output terminal 6. Strong / weak current coupling / decoupling device; 13. Weak current output terminal 7. Core coupling region; 8. Output terminal of the combined high-voltage and low-voltage cable; 9. Coupler terminal outgoing line monitoring module; 10. Areas with high-voltage electricity; 11. Low-voltage area; 12. High-voltage output terminal; 13. Low-voltage output terminal; 14. Low-voltage tapered coupling interface; 15. Input terminal for both high-voltage and low-voltage cables; 16. Coupler end incoming line monitoring module; 17. Regional hub transformer; 18. Low-voltage side outgoing terminal; 19. Outgoing line monitoring module; 20. Incoming line monitoring module; 21. Main cable channel; 22. Main step-up transformer; 23. High-voltage side incoming line terminal; 24. Municipal-level main transformer; 25. District-level main transformer; 26. Transmission transformer; 27. Patch-type transformer; 28. Building unit distribution box; 29. Household electrical distribution box; 30. Terminal decoupling panel. Detailed Implementation

[0073] During system deployment, the reference frequency is synchronized step-by-step from the central control level to the terminal level to ensure that the entire network operates with the same clock, phase, frequency, and direction. During power line upgrades, coaxial cables with internal strong and external weak current are replaced simultaneously to achieve electrical isolation between strong and weak currents, enhanced magnetic field coupling, and simultaneous power and communication transmission over the same cable. Each node is equipped with coupling and decoupling devices. At the central control level, weak current signals are coupled and injected; at the hub level, signals are picked up, reinforced, and re-injected; and at the terminal level, power and signals are completely separated.

[0074] In the community power distribution transmission section, community-level synchronous coupling equipment is installed at the community transformer nodes to receive signals from the upper level and inject them into the community power distribution network after synchronous calibration based on the community transformer's power frequency. Each building's distribution box is equipped with building-level repeater amplification equipment to non-contactly pick up signals from the distribution lines, synchronously calibrate and strengthen them before reinjecting them into the distribution lines of each unit in the building. All community power distribution lines use co-existing cables, which are laid with newly built communities or replaced during the renovation of older communities.

[0075] At the end-of-home transmission segment, the in-home distribution box is equipped with in-home signal access and distribution equipment to pick up low-voltage signals from the in-home co-location cable and distribute them to branch lines in each room. Wall sockets in each room utilize co-location panels with embedded panel-type signal reinforcement and coverage modules. During renovation, only co-location cables need to be laid and corresponding panels installed, making it fully compatible with conventional circuit construction procedures. Once the equipment is installed, the system operates automatically, with multiple room panels working together to form a seamless roaming network throughout the house.

[0076] Each node at both ends of the symbiotic cable integrates a corresponding level of safety monitoring unit, which is calibrated and stored during factory installation. During normal operation, each unit monitors and cross-compares data in real time. An anomaly in the low-voltage layer triggers a Level 1 early warning to notify the maintenance platform or user. A leakage current breakdown in the high-voltage layer triggers a Level 2 emergency isolation, automatically disconnecting the corresponding segment within milliseconds. Within a home, each panel-level unit independently monitors its own room's branch circuit; a leakage current in a single room only disconnects that room, while other rooms maintain normal power and communication, preventing a whole-house trip. When high-power appliances start, the cross-comparison arbitration module identifies surge current characteristics through an extreme operating condition surge discrimination mechanism, preventing false isolation. The acquisition module has multiple redundant backups; in the event of a single-channel failure, it automatically switches to the healthy channel and reports the anomaly.

[0077] Ordinary electrical equipment only draws on high-voltage electricity and does not come into contact with or interfere with low-voltage signals, so electrical safety is not affected in any way. The system is fully compatible with existing operator base stations and satellite networks, allowing for a smooth transition and step-by-step iteration, ultimately forming a three-tiered, three-dimensional, all-domain communication system with the power grid backbone, base station reinforcement, and satellite backup.

Claims

1. A strong-weak electrical coexistence global transmission system based on power frequency magnetic field synchronous coupling, characterized in that, Using high-voltage power as the core and sole synchronization reference, and low-voltage signals as the flexible coupling carrier, the system employs a robust master-slave architecture with synchronized frequency, magnetic field coupling, and electrical isolation. It comprises three levels of nodes: a central control level, a hub level, and a terminal level. These nodes correspond sequentially from top to bottom to the high-voltage backbone transmission section of the power grid, the community distribution transmission section, and the end-user transmission section. This enables seamless power supply and data communication across the entire power supply chain, from the national backbone power grid to the community distribution network and even to the interior wall panels of homes, with simultaneous cable transmission, field gain, full connectivity, and progressive expansion. The system uses a coaxial cable with an inner high-voltage and an outer low-voltage conductor as the core transmission carrier. This cable, from the inside out, consists of a high-voltage conductive core, a low-conductivity uniform field multifunctional metal composite layer, an inner insulating layer, a low-voltage conductive layer, and an outer insulating sheath, all nested coaxially. The inner insulating layer ensures complete electrical isolation between high and low voltage signals. The low-conductivity, uniform-field, multi-functional metal composite layer concentrates, homogenizes, and directionally enhances the power frequency magnetic field generated by the high-voltage conductive core, confining electromagnetic interference from the high-voltage side to the inner side of this layer. The enhanced power frequency magnetic field penetrates the inner insulating medium and couples to the low-voltage conductive layer, providing continuous unidirectional energy coupling replenishment for low-voltage signals, offsetting line transmission losses, and achieving stable, dead-angle-free coverage across the entire area without the need for multi-level hopping at base stations or satellite relays. The system deploys dual-path current anomaly monitoring and automatic isolation units at both ends of each coexisting cable segment. The entry-level unit monitors the entry bus segment, while the panel-level units independently monitor their respective branch segments within the room. Through a four-step closed-loop process of factory benchmark anchoring, dual-path independent acquisition, cross-comparison arbitration, and graded response execution, the system achieves graded early warning of low-voltage layer anomalies and graded emergency isolation of high-voltage layer leakage breakdown. When a panel-level unit triggers isolation, it only cuts off the branch line within its own room, while other rooms maintain normal power supply, achieving precise fault isolation within a single room.

2. The system according to claim 1, characterized in that, The low-conductivity homogenizing multifunctional metal composite layer is a special alloy composite structure with magnetic field modulation, power frequency field enhancement, and electromagnetic isolation characteristics. This structure concentrates, homogenizes, and directionally enhances the power frequency magnetic field generated by the high-electric-conducting core, precisely constraining the magnetic field distribution range. Simultaneously, it completely confines the alternating magnetic field and electromagnetic clutter on the high-electric side within the layer, blocking the outward transmission of electromagnetic interference. This layer does not participate in power conduction, has stable physicochemical properties at its interface with the adjacent insulating medium, and collaboratively constructs a graded insulation protection system. During operation, its own temperature rise is extremely low.

3. The system according to claim 1, characterized in that, The system is equipped with a dedicated coupling / decoupling device for non-contact coupling injection and separation of power frequency electrical energy, power frequency magnetic field, and weak electrical signals. The device employs a docking-type cavity structure with tapered docking ports at both ends and a core coupling working area in the middle. The tapered docking ports are used for sealed coaxial connection with coexisting cables, while the core coupling working area utilizes a modulated and enhanced power frequency magnetic field to couple or decouple weak electrical signals. The device possesses sealing, insulation, and magnetic circuit sealing characteristics.

4. The system according to claim 1, characterized in that, The central control level, with power grid hubs and step-up transformers as core nodes, deploys centralized synchronous coupling main control equipment. This equipment includes a power frequency reference locking module, a data signal modulation module, and a strong electromagnetic field coupling injection module. The power frequency reference locking module collects voltage, current, power frequency fluctuations, and power parameters of the high-voltage circuit in real time, generating a unified synchronous clock across the entire domain. The data signal modulation module uses this synchronous clock as a reference to modulate the communication data signal to be transmitted into a signal with the same frequency as the fundamental frequency of the high-voltage circuit or its integer multiples of harmonics. The strong electromagnetic field coupling injection module injects the modulated weak current signal into the weak current conductive layer of the symbiotic cable through a non-contact magnetic field coupling method.

5. The system according to claim 1, characterized in that, The hub-level system uses regional hub substations, regional main substations, community transformers, distribution rooms, distribution boxes, and transformer substations as relay nodes, deploying regional synchronous amplification and coupling equipment. This equipment includes a line signal acquisition module, a signal synchronization reinforcement module, and a magnetic field coupling re-injection module. In the community power distribution transmission section, the hub-level equipment is specifically deployed as community-level synchronous coupling equipment and building-level relay amplification equipment. The community-level synchronous coupling equipment is deployed at the community transformer node, receiving signals from the upper level and synchronously calibrating them using the community transformer's power frequency as a local reference before injecting them into the community power distribution network. The building-level relay amplification equipment is deployed at each building's distribution box node, non-contactly acquiring signals from the distribution lines, synchronously calibrating and reinforcing them before re-injecting them into the distribution lines of each unit in the building.

6. The system according to claim 1, characterized in that, The terminal level utilizes building-wide centralized power distribution equipment, household power distribution equipment, in-home distribution boxes, wall socket terminals, and smart receiving devices as terminal carriers after the output of the box-type power distribution equipment, deploying plug-and-play terminal devices. In the in-home transmission segment, the terminal level equipment is specifically deployed as in-home signal access and distribution equipment and panel-type signal reinforcement and coverage modules. The in-home signal access and distribution equipment is installed at the in-home distribution box, non-contactly picking up weak current signals from the in-home co-existing cables and distributing them to branch lines in each room. The panel-type signal reinforcement and coverage module is embedded inside the wall socket panel of each room, forming a panel-type integrated structure. It includes a line signal coupling pickup module, a synchronization calibration module, a signal synchronization reinforcement module, a wired reinjection module, and a spatial wireless coverage module. It non-contactly picks up signals from the branch lines in its own room, performs synchronous calibration and reinforcement, and then reinjects one signal back into the line for reinforcement transmission, while converting another into a standard spatial wireless signal to cover the corresponding room. Multiple room panels work collaboratively, with terminal devices automatically switching to the panel with the strongest signal, achieving seamless roaming coverage throughout the house. A terminal decoupling unit is installed at the terminal to completely separate power and signal.

7. The system according to claim 1, characterized in that, Strictly adhering to the irreversible master-slave rule: the high-voltage signal is the core reference, and its operating conditions are not affected or changed by the low-voltage signal; the low-voltage signal is the subordinate coupling carrier, and its frequency, phase, and amplitude are dynamically and synchronously calibrated in accordance with the real-time operating conditions of the high-voltage signal, always maintaining the same frequency and direction and synchronous fluctuations, thus eliminating electromagnetic interference and phase cancellation from the source.

8. The system according to claim 1, characterized in that, Each level of dual-path current anomaly monitoring and automatic isolation unit consists of a high-voltage side current acquisition module, a low-voltage side signal acquisition module, a factory reference storage module, a cross-comparison arbitration module, and a graded response execution module. The high-voltage and low-voltage sides independently acquire their respective parameters and compare them with the factory reference, while simultaneously exchanging real-time acquired data for cross-comparison. When the low-voltage side parameters deviate from the factory reference but the high-voltage side is normal, a level one early warning is triggered, notifying maintenance for repair without interrupting power supply. When the high-voltage side detects a sudden current change and the low-voltage side detects high-voltage intrusion characteristics, a level two emergency isolation is triggered. This node automatically disconnects the electrical connection with adjacent nodes on the faulty side within milliseconds and sends isolation commands to upstream and downstream nodes, containing the faulty section within the smallest possible area. When a panel-level unit triggers level two emergency isolation, only the branch lines in its own room are disconnected; other rooms maintain normal power supply and communication.

9. The system according to claim 8, characterized in that, The cross-comparison arbitration module incorporates an extreme operating condition surge detection mechanism, distinguishing between surges and leakage by comparing the synchronous change characteristics of the high-voltage and low-voltage sides. Both the high-voltage side current acquisition module and the low-voltage side signal acquisition module employ a multi-channel redundant sampling backup mechanism, with each module integrating at least three independent sampling channels. Each channel is independently powered and independently acquired. The arbitration module performs consistency judgment on the data from each channel, automatically isolating and switching to the remaining healthy channel in case of a single channel failure.

10. A method for global control of strong and weak current coexistence based on synchronous coupling of power frequency magnetic field, characterized in that, The process includes the following irreversible steps: using the high-voltage power frequency as the sole absolute reference, real-time acquisition of voltage, current, flow rate, power frequency fluctuations, and power tolerance parameters generates a globally unified synchronous clock; using the high-voltage synchronous clock as the core, locking the frequency of the low-voltage data signal to the fundamental frequency of the high-voltage power frequency or its integer multiple harmonic frequencies, dynamically calibrating the phase and amplitude to achieve complete synchronization of low-voltage signals with the high-voltage power frequency and direction; injecting the synchronized low-voltage signal into the low-voltage conductive layer of the cable through a non-contact magnetic field coupling method, utilizing the ring power frequency generated by the operation of the high-voltage conductive core. After the magnetic field is regularized and enhanced by a low-conductivity uniform field multifunctional metal composite layer, it provides continuous unidirectional energy replenishment for weak electrical signals. Through the three-level nodes of the master control level, hub level and terminal level, the entire area is connected. The hub level picks up, synchronously strengthens and re-injects the signal. The terminal level distributes the signal to each room at the entrance end and converts it into a spatial wireless signal by the panel terminal, realizing the same reference, the same frequency, the same phase and seamless roaming throughout the house. At the terminal node, the coupled signal is synchronously calibrated and the power is strengthened to realize the full-area reinjection reinforcement of the line and spatial wireless coverage.

11. The global extended application of the system according to claim 1, characterized in that, It is seamlessly compatible with five levels of deployment: home, building, community, city, and national power grid. At the home level, it achieves whole-house coverage without network cables or routers through in-home distribution box equipment and panel terminals in each room. At the building level, it achieves full-area signal continuity through relay amplification equipment in the building's distribution box. At the community level, it achieves full-area coverage of the community through community transformer synchronous coupling equipment and building relay amplification equipment. At the city and national levels, it integrates with the replacement of aging power grid lines and coexisting cables, allowing for synchronized upgrades, phased implementation, and smooth transitions with the natural iteration of the power grid. The system can coexist and complement existing terrestrial base stations and satellite communication systems, ultimately forming a three-tiered, multi-path redundant, and uninterrupted national-level all-area communication network with a power grid backbone, base station reinforcement, and satellite backup.

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