Series Solar Module Layout With Insulated Carriers for Medium Voltage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing solar power systems face inefficiencies and high costs due to the grounding of solar modules and carrier units, particularly in large PV parks exceeding 100 MW, leading to high currents and significant energy losses during power transmission.
Innovation Solution
A series circuit arrangement of solar modules with insulated carrier units, utilizing a medium voltage power converter to generate and transmit AC voltage, eliminating the need for grounding and reducing insulation demands, allowing for higher voltage generation and lower current usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If solar modules are connected in series to generate high voltage, then the power output increases, but the insulating DC voltage exceeds the insulation resistance limit of the modules
Solution Approach 1:
The patent divides the series circuit of solar modules into multiple segments, each with a string of solar modules connected in series. Each segment is equipped with its own connecting point and insulator, allowing the high voltage to be segmented into manageable portions that each remain within the insulation resistance limits of the solar modules.
Solution Approach 2:
The patent introduces insulators as intermediary components between the connecting points and the carrier unit. These insulators act as mediators that electrically isolate the high voltage potential at the connecting points from the grounded carrier unit, enabling high voltage operation while maintaining insulation integrity.
2Object-affected harmful factors
If the carrier unit is electrically conductive and connected to ground, then safety is improved, but the insulating DC voltage between connectors and housing is exceeded
Solution Approach 1:
The patent introduces insulators as intermediary components between the connecting points and the carrier unit. These insulators act as mediators that electrically isolate the high voltage potential at the connecting points from the grounded carrier unit, enabling high voltage operation while maintaining insulation integrity.
Solution Approach 2:
The patent segments the electrical circuit into isolated sections using insulators at each connecting point. This segmentation allows the carrier unit to be grounded for safety while the solar module strings maintain their high voltage potential through the insulating barriers.
3Reliability
If insulators are provided between carrier units of solar units arranged in series, then the insulating DC voltage is maintained, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the solar power generation system into multiple independent solar units, each with its own connecting point and insulator. This modular segmentation maintains insulation requirements while allowing standardized replication of units, which can reduce overall system complexity through modularity.
Solution Approach 2:
The patent combines multiple solar units with identical insulation requirements into a series configuration, where the insulators serve dual purposes: maintaining insulation for each unit and enabling the series connection for voltage multiplication. This merging approach consolidates insulation requirements rather than requiring separate insulation systems for each unit.
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 approach enhances efficiency and reduces energy losses, enables longer transmission distances without additional transformers, and decreases component costs by using lower voltage cables and fewer components, making large-scale solar power systems more economical and compact.
Implementation Method 1
Solar modules, also referred to as photovoltaic (PV) modules or photovoltaic panels, are connected in series in order to generate electrical power from sunlight
Implementation Method 2
the carrier units of the respective solar modules are arranged to be electrically insulated from one another by means of an insulator
Data Source
AI summary
A solar group unit includes at least two solar units. Each of the solar unit includes plurality of solar modules which are each arranged in a carrier unit. A connecting point to an electrical connection is arranged between two of the solar modules that are arranged in a series circuit. The carrier unit is at least partially electrically conductive and is electrically conductively connected to the connection point. The solar units are arranged electrically in series in order to transmit the generated electrical power. The carrier units of the respective solar modules are arranged such as to be electrically insulated from one another by an insulator which is embodied as a component.