Power Supply Protection Circuit With Energy Storage Backup
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Solution Overview
Problem
Conventional power supply systems for photovoltaic power generation require redundant control circuits and components, leading to complex and costly designs due to the need for doubled switched-mode power supplies, controllers, and sampling circuits.
Innovation Solution
A power supply control protection system utilizing an energy storage element as an auxiliary power supply, combined with a main and auxiliary controller, and a self-detection sampling circuit, which simplifies the circuitry and reduces costs by eliminating the need for duplicate components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all switched-mode power supply, controller and sampling circuit are doubled for redundant control, then safety and reliability are improved, but device complexity and cost increase
Solution Approach 1:
The patent merges the power supply function by having the switched-mode power supply serve dual purposes: as the primary power source and as a fault detection device. The controller also performs multiple functions including normal control and fault detection. This consolidation reduces the need for completely separate redundant components while maintaining safety requirements.
Solution Approach 2:
The switched-mode power supply is designed to perform multiple functions: providing power to the system and simultaneously detecting faults through monitoring its own operation. The controller similarly handles both normal control operations and fault detection. This multi-functionality reduces the overall component count while maintaining redundant control capabilities.
2Reliability
If all switched-mode power supply, controller and sampling circuit are doubled for redundant control, then safety and reliability are improved, but cost increases
Solution Approach 1:
The patent combines components to reduce the total bill of materials. The switched-mode power supply and controller are designed to perform both primary functions and fault detection functions, eliminating the need for separate duplicate components in many cases, thereby reducing manufacturing cost.
Solution Approach 2:
By designing the switched-mode power supply and controller to handle multiple functions (power supply plus fault detection, control plus monitoring), the patent reduces the overall component count required, leading to lower material costs and simplified manufacturing processes while maintaining safety standards.
3Reliability
If switched-mode power supply fails to supply power, then system operation is interrupted, but with energy storage element, reliable control is maintained
Solution Approach 1:
The energy storage element is pre-charged during normal operation to be ready for immediate use when the switched-mode power supply fails. This preliminary preparation ensures that the controller and sampling circuit can continue operating without interruption, maintaining system reliability during fault conditions.
Solution Approach 2:
The energy storage element acts as an intermediary between the switched-mode power supply and the load (controller and sampling circuit). When the primary power supply fails, the energy storage element mediates by providing temporary power support, allowing the system to maintain operation and complete fault isolation procedures.
Data Source
AI summary
A power supply control protection system includes: a switching power supply, a main controller, an auxiliary controller, a sampling circuit and an energy storage element, the switching power supply is used for supplying power to the sampling circuit, the main controller and the auxiliary controller; the energy storage element is used for providing an auxiliary power supply for the sampling circuit, the main controller and the auxiliary controller; the sampling circuit has a self-checking function and sends a self-checking result to at least one of the main controller and the auxiliary controller; when the self-checking result indicates that the sampling circuit is normal, the main controller or the auxiliary controller controls a converter to work; and the main controller and the auxiliary controller communicate with each other. When a switching power supply cannot normally supply power, an energy storage element supplies power to a circuit.