Multi-Level Magnetic Dipole Modeling for Electromagnetic Wave Analysis
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Solution Overview
Problem
Conventional underwater target detection methods, such as sonar, face challenges with false alarms due to ocean sediment and seabed terrain, and acoustic detection is inefficient in large sea areas, while existing electromagnetic wave modeling is limited to plane surfaces, ignoring refraction and curvature, leading to low accuracy in power frequency electromagnetic wave analysis.
Innovation Solution
An electromagnetic wave spatial analysis method based on multi-level magnetic dipole group modeling, which accounts for altitude and curvature, dividing power grids into levels, calculating magnetic dipole groups, and building multi-level dipole models to simulate power frequency electromagnetic wave distribution, including ionized, land-ocean-seabed, and air layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plane modeling method is used for power grids, then modeling simplicity is maintained, but analysis accuracy of power frequency electromagnetic waves deteriorates due to ignoring refraction and curvature effects
Solution Approach 1:
The power grid system is segmented into multiple voltage levels (e.g., 500kV, 220kV, 110kV), and each level is modeled separately with appropriate dipole configurations. This segmentation allows complex refraction and curvature effects to be handled systematically at each level while maintaining overall modeling manageability
Solution Approach 2:
The invention transitions from two-dimensional plane modeling to three-dimensional spherical coordinate modeling. By introducing altitude as a third dimension and using spherical coordinates (radius, azimuth, elevation), the model accurately represents the curved Earth surface and atmospheric refraction effects that plane modeling cannot capture
2Productivity
If sonar detection method is used for underwater targets, then detection capability is provided, but false alarm rate increases due to ocean sediment and seabed terrain interference
Solution Approach 1:
The invention replaces acoustic detection (sonar) with electromagnetic wave detection. By using power frequency electromagnetic fields generated by power grids as the detection mechanism, the system avoids acoustic interference from seabed terrain and ocean sediment, thereby reducing false alarms while maintaining detection capability
3Area of stationary object
If acoustic detection arrays are deployed for large sea areas, then detection coverage is improved, but system cost and vulnerability to noise interference increase
Solution Approach 1:
The power grid infrastructure serves dual purposes: power transmission and electromagnetic detection. The existing power lines act as both electrical conduits and electromagnetic wave sources for detecting underwater targets, eliminating the need for separate detection arrays and reducing system complexity and cost
Solution Approach 2:
The power grid system provides its own detection function by generating power frequency electromagnetic waves that can detect underwater targets. The infrastructure serves itself for both power distribution and detection purposes, reducing dependency on additional specialized equipment
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method enhances the accuracy of power frequency electromagnetic wave analysis by considering terrain fluctuations and refraction, enabling more precise detection of underwater targets and improving the analysis of power frequency electromagnetic waves in complex environments.
Implementation Method 1
the refraction that may occur when the electromagnetic waves propagate to the far-field regions
Implementation Method 2
equivalent ultra-long wave antenna array modeling analysis... making the power grid of each voltage level corresponding to any one of the loop lengths λ, λ/2, λ/4, λ/8, and λ/10 equivalent to a magnetic dipole
Data Source
AI summary
The present invention discloses an electromagnetic wave spatial analysis method based on multi-level dipole group modeling. The electromagnetic wave spatial analysis method includes the following steps: S1, obtaining a magnetic dipole group according to three-phase loops of power grids of various different voltage levels, and obtaining spatial coordinates of the magnetic dipole group according to the longitudes and latitudes as well as the altitudes of the power grids of various voltage levels; S2, calculating the loop length of each three-phase magnetic dipole according to the spatial coordinates of the magnetic dipole group, and obtaining a multi-level magnetic dipole group according to the loop lengths; S3, obtaining the current corresponding to the voltage on power transmission loops in the power grids of various voltage levels at different levels according to the installed capacities of the power grids of various voltage levels in different countries; S4, building a multi-level dipole model according to the multi-level magnetic dipole group and the current; and S5, solving the multi-level dipole model to obtain spatial power frequency electromagnetic wave distribution. The altitude factor of grid distribution is added in the present invention, and the power grids are divided into multiple levels for modeling analysis respectively, thereby increasing the analytical accuracy of power frequency electromagnetic waves.