PV Bypass Control Circuit to Cut Switch Loss and Voltage Stress
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Solution Overview
Problem
Traditional series-type photovoltaic component control devices suffer from high energy consumption due to constantly ON switch transistors, complex control logic, high voltage stress on switch transistors, and difficulty in designing stable power supply circuits, leading to inefficiency and safety risks.
Innovation Solution
A photovoltaic component control device with bypass modules connected in parallel to components, bypassing them under controller control, eliminating series-connected switch transistors, and incorporating power supply and driving circuits to manage energy flow and voltage adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If switch transistors are connected in series and kept in constant ON state to ensure series connection and normal operation, then the photovoltaic system operates normally, but large amount of energy is consumed resulting in low power generation efficiency
Solution Approach 1:
The patent divides the photovoltaic array into multiple independent groups, each with its own control device. This segmentation allows individual groups to be controlled independently, enabling the system to bypass specific groups that would otherwise consume energy while keeping others active, thus reducing overall energy consumption while maintaining system operation.
Solution Approach 2:
The patent introduces bypass modules as intermediary components that can be activated to short-circuit specific photovoltaic groups. These bypass modules act as mediators that allow current to flow through alternative paths, eliminating the need for series-connected switch transistors to remain in constant ON state, thereby reducing energy consumption while maintaining system functionality.
2Reliability
If series-type control device is used to protect safety by disconnecting photovoltaic arrays, then safety rules are met, but the control device complexity increases and power supply circuit design becomes difficult
Solution Approach 1:
The patent divides the photovoltaic array into multiple independent groups with individual control devices. Each control device manages a specific group, simplifying the control logic and power supply design for each unit while maintaining overall system safety through distributed control architecture.
Solution Approach 2:
Each photovoltaic group is equipped with its own control device that can independently detect faults and activate bypass modules. This self-service capability eliminates the need for complex centralized control and power supply circuits, as each unit autonomously manages its own safety protection.
3Use of energy by moving object
If bypass modules are connected in parallel to photovoltaic components to enable independent bypass, then energy consumption is reduced and reliability is improved, but additional components and control circuits are required
Solution Approach 1:
The patent combines the bypass module, driving circuit, power supply module, and controller into an integrated control device that is connected in parallel with each photovoltaic group. This merging of functions into a single modular unit simplifies the overall system architecture while enabling independent bypass capability, reducing energy consumption without proportionally increasing complexity.
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
Reduces power consumption, simplifies circuit structure, enhances safety, improves reliability, and lowers costs by allowing independent failure component removal without affecting system operation, maximizing power generation.
Implementation Method 1
Photovoltaic power generation technology has been one of the widely used clean energy technologies currently
Data Source
AI summary
The embodiment of the present disclosure provides a photovoltaic component control device including at least one bypass module configured to connect in parallel to at least one photovoltaic component; a driving circuit configured to drive the at least one bypass module to operate under control of a controller; a power supply module configured to obtain energy from the at least one photovoltaic component and output the energy to the controller in a case that the at least one photovoltaic component operates normally and the at least one photovoltaic component is bypassed; the controller configured to control an ON state of the at least one bypass module to control whether the at least one photovoltaic component is in a bypass mode. The energy consumption of the control device is greatly reduced, a problem of voltage stress is solved, and the safety performance of the bypass-type control device is improved.