PLP Layout for Photovoltaic Lightning Protection Coverage
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Solution Overview
Problem
There is a lack of an optimization layout method for Passive Plasma Lightning Protector (PLP) devices in photovoltaic power stations, which are vulnerable to lightning strikes, leading to potential equipment damage and safety hazards.
Innovation Solution
A method for optimizing the layout of PLP devices by measuring protected areas, determining object heights, calculating protection distances and distances between devices, and adjusting installation heights and numbers to ensure comprehensive coverage, considering terrain complexity and economic efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional lightning rods and air terminals are used to attract lightning to ground, then direct lightning strike protection is achieved, but ground potential rises causing equipment back-flashover overvoltage and personal electric shock hazards
Solution Approach 1:
The patent converts the harmful effect of lightning attraction into a beneficial neutralization process. Instead of allowing lightning to discharge through traditional rods (causing ground potential rise), the PLP device uses the thundercloud's own electric field to generate plasma that actively neutralizes cloud charges, transforming the harmful lightning attraction mechanism into a protective charge cancellation process that prevents ground potential rise and equipment overvoltage
Solution Approach 2:
The patent replaces the mechanical/electrical conduction system of traditional lightning rods with a plasma-based electromagnetic field system. The PLP device uses dielectric barrier discharge to generate plasma that neutralizes charges through electromagnetic interaction, substituting the direct electrical conduction path (which causes ground potential rise) with a field-based neutralization mechanism that eliminates the harmful side effects
2Area of stationary object
If multiple PLP devices are installed to expand protection range, then coverage area increases, but installation cost and system complexity increase
Solution Approach 1:
The patent divides the large photovoltaic power station area into multiple smaller protection zones, each covered by individual PLP devices. This segmentation allows the system to achieve comprehensive coverage through coordinated operation of multiple units, where each device protects a specific radius area and overlapping coverage ensures complete protection without excessive device density
Solution Approach 2:
The patent optimizes protection range by utilizing the three-dimensional space above the photovoltaic array. By installing PLP devices at elevated heights and leveraging their spherical protection radius, the system achieves area coverage through vertical positioning rather than simply increasing horizontal device density, reducing the number of devices needed while maintaining comprehensive coverage
3Area of stationary object
If PLP devices are installed at higher heights to increase protection radius, then coverage area expands, but installation cost and structural requirements increase
Solution Approach 1:
The patent establishes a dynamic optimization relationship between installation height and protection effectiveness. Rather than fixing devices at maximum heights, the method determines optimal heights based on specific site requirements, protected object heights, and desired protection radii, allowing flexible adjustment that balances coverage needs with installation feasibility and cost constraints
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
Maximizes protection range and economic efficiency while ensuring effective lightning protection for photovoltaic power stations, enhancing protection in intermediate areas and accommodating complex terrains.
Implementation Method 1
The strong ionization discharge device generates and emits high-concentration plasma in both directions between the cloud and the ground
Implementation Method 2
generates and emits high-concentration plasma
Implementation Method 3
The principle of traditional lightning rods and air terminals is to utilize the phenomenon of corona discharge at the tip to attract the lightning cloud charges in the atmosphere to the lightning rod
Implementation Method 4
With the 'quasi-tip effect', its own electric field strength under the thundercloud is two orders of magnitude higher than that of the protected object
Implementation Method 5
conduct the lightning current to the ground through its own grounding conductor
Data Source
AI summary
An optimization layout method for PLP lightning protection in a photovoltaic power station includes: determining the size of the protected area required by the photovoltaic power station; determining the height hx of the protected electrical equipment; determining the protection distance rx of a single PLP device at the protected height hx; determining the external protection range and the internal protection range when multiple PLP devices jointly protect; calculating the optimal PLP layout scheme by combining the respective maximum horizontal distances to achieve effective lightning protection for the photovoltaic power station. The method of the present invention can be widely applied to the optimization layout of lightning protection in photovoltaic power stations.