Solar Network Shut-Off Circuit Layout for Fast Module Isolation
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Solution Overview
Problem
Conventional solar power generation network shut-off systems require multiple circuit breakers for each module, leading to high installation costs and time-consuming setups during emergencies or maintenance.
Innovation Solution
A solar power generation network shut-off unit with a first circuit breaker connected in series between solar power generation modules and a power conditioner, and second circuit breakers distributed among the modules, which receive an emergency shut-off signal to shut off power, reducing the need for individual module circuit breakers and enabling efficient power disruption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If one circuit breaker is provided for each solar power generation module, then the safety and reliability of power shut-off is improved, but the installation cost and time increase
Solution Approach 1:
The system divides the circuit breaker functionality into two segments: a first circuit breaker disposed in series with the power conditioner that handles main power interruption, and second circuit breakers disposed at individual solar power generation modules that handle localized shut-off. This segmentation allows the system to maintain high reliability through distributed protection while reducing overall complexity by using fewer total circuit breakers compared to having one per module.
Solution Approach 2:
The first circuit breaker acts as an intermediary that receives emergency shut-off signals and transmits them to the second circuit breakers. This intermediary role allows centralized control while maintaining distributed protection, resolving the contradiction by enabling reliable shut-off through a hierarchical structure rather than requiring every module to have independent control capability.
2Reliability
If multiple circuit breakers are installed for each module, then the emergency response capability is improved, but the installation cost increases
Solution Approach 1:
The circuit breaker system is segmented into two functional groups with different roles: the first circuit breaker provides centralized emergency response capability, while the second circuit breakers provide localized module-level protection. This segmentation enables the system to achieve comprehensive emergency response capability without requiring expensive redundant circuit breakers at every module, thus reducing installation cost while maintaining reliability.
Solution Approach 2:
The first circuit breaker serves multiple functions: it provides main power interruption, acts as a signal transmission hub for emergency shut-off commands, and coordinates the operation of multiple second circuit breakers. This multi-functionality reduces the total number of circuit breakers needed, thereby lowering installation cost while maintaining comprehensive emergency response capability.
3Speed
If one circuit breaker is provided for each solar power generation module, then the power shut-off speed is improved, but the installation time increases
Solution Approach 1:
The shut-off function is segmented between the first circuit breaker that provides rapid centralized interruption and the second circuit breakers that provide faster localized response. This segmentation enables the system to achieve fast power shut-off speed without requiring extensive installation time, as the hierarchical structure allows coordinated operation rather than requiring individual configuration of every circuit breaker.
Solution Approach 2:
The system implements feedback through signal transmission between the first and second circuit breakers. When the first circuit breaker receives an emergency shut-off signal, it immediately interrupts power and simultaneously transmits shutdown commands to the second circuit breakers, which then execute localized shut-off. This feedback mechanism ensures rapid coordinated response without requiring manual configuration or lengthy installation procedures.
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 configuration lowers installation costs and ensures safe power shutdown during emergencies by allowing a single first circuit breaker to initiate power shutdown, with second circuit breakers following suit, reducing voltage stress and installation expenses.
Implementation Method 1
DC voltage is generated by photoelectric conversion in a solar power generation module
Data Source
AI summary
A solar power generation network shut-off unit comprises a first circuit breaker and second circuit breakers. The first circuit breaker is provided to a power line connecting a plurality of solar power generation modules and a power conditioner in series. When an emergency shut-off button is pressed, the supply of power from the solar power generation modules through the power line is shut-off, and an emergency shut-off signal is transmitted. The second circuit breakers are provided to each of a plurality of solar power generation modules, and when an emergency shut-off signal is received from the first circuit breaker, the supply of power from the plurality of solar power generation modules through the power line is shut-off.