Solar Power Control System Overload Prevention
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Solution Overview
Problem
Solar power generation systems often halt due to overload conditions, requiring manual reactivation when output power from a power conditioner exceeds generated power, leading to inefficiencies and operational disruptions.
Innovation Solution
A power control system that includes a power converter, storage battery, charge controller, power detecting means, and controlling means to monitor and adjust input power, preventing overload by maintaining a differential between generated and input power within a predetermined value, thereby preventing system shutdown.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the power converter operates in isolated operation mode to maximize power output, then the productivity is improved, but the system becomes vulnerable to overload conditions that cause shutdowns
Solution Approach 1:
The control unit continuously monitors the differential between generated power and input power, and automatically adjusts the input power to the charge controller based on this feedback. This closed-loop control prevents overload conditions while maximizing power utilization, resolving the contradiction between productivity and reliability.
Solution Approach 2:
The system proactively controls input power before overload conditions occur by maintaining a predetermined differential between generated and input power. This preliminary action prevents shutdowns before they happen, ensuring continuous operation while maximizing power output.
2Device complexity
If manual reactivation is required after overload shutdown, then the system complexity is reduced, but the loss of time and operational efficiency deteriorates
Solution Approach 1:
The control unit automatically manages power input and prevents overload conditions without requiring manual intervention. The system serves itself by continuously monitoring and adjusting power levels, eliminating shutdowns and reactivation needs, thus reducing both complexity and time loss.
3Ease of operation
If the differential between generated power and input power is not controlled, then the ease of operation is improved, but the harmful effects of overload conditions increase
Solution Approach 1:
The system automatically monitors and controls the power differential without requiring operator intervention. The control unit adjusts input power based on real-time conditions, preventing overload harmful effects while maintaining operational simplicity.
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
The system effectively inhibits shutdowns by controlling input power, ensuring continuous operation and maximizing generated power output without manual reactivation, even during fluctuations in sunlight intensity.
Implementation Method 1
a power converter configured to convert DC power generated by the solar power generation module into AC power
Implementation Method 2
convert the AC power into DC power, and to store the DC power in the storage battery
Data Source
AI summary
A solar power generation system includes: a solar power generation module; a power converter for solar power generation configured to convert DC power generated by the solar power generation module into AC power; a storage battery unit; a charge and discharge controller configured to take out the AC power obtained through conversion by the power converter 3 for solar power generation from an isolated operation mode terminal, convert the AC power into DC power, and to store the DC power in the storage battery unit. A controller detects input power taken out from the isolated operation mode terminal and inputted into the charge and discharge controller, acquires generated power generated by the solar power generation module, and lowers the input power inputted into the charge and discharge controller when a differential between the acquired generated power and the detected input power is not greater than a predetermined value.