Solar Panel Voltage Control for Fast Output Limiting
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Solution Overview
Problem
The rapid increase in renewable energy facilities leads to output limitations due to surplus power, destabilizing the grid and causing conflicts, which conventional methods address inadequately, leading to penalties and inefficiencies.
Innovation Solution
A voltage control device for solar power generation that calculates and adjusts output points flexibly according to market demand or grid commands, using a pattern comparison method to quickly determine the limited output point, minimizing power overshoot/undershoot and grid overload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If repetitive voltage control iterations are performed to calculate the limited output point, then the accuracy of output control is improved, but the computation time increases and convergence speed decreases
Solution Approach 1:
The patent pre-calculates and stores multiple output patterns (P-V curves) covering different operating conditions before actual operation. When an output limit is requested, the system directly compares the current situation with pre-stored patterns to quickly determine the limited output point, avoiding time-consuming real-time iterative calculations while maintaining high accuracy
Solution Approach 2:
The system dynamically selects the most appropriate pre-stored output pattern based on current operating conditions (irradiance, temperature, etc.) and uses pattern comparison algorithms to adaptively determine the optimal limited output point. This dynamic selection approach ensures both rapid response and high precision without requiring repeated iterations
2Measurement precision
If repetitive voltage control iterations are performed to obtain the limited output point, then the control precision is improved, but power overshoot or undershoot occurs
Solution Approach 1:
By pre-calculating output patterns under various conditions and storing them beforehand, the system eliminates the need for repetitive real-time iterations. The pre-stored patterns provide accurate P-V curve information that directly guides voltage adjustment to the limited output point, preventing oscillations and ensuring stable power output without overshoot or undershoot
Solution Approach 2:
The patent creates simplified copies of the complex P-V curves in the form of pre-stored output patterns that capture the essential characteristics. These pattern copies enable rapid comparison and direct determination of the limited output point without requiring repeated computational iterations, thereby maintaining precision while ensuring power stability
3Productivity
If conventional algorithms are used to calculate the limited output point, then the calculation can be performed, but the response time is delayed and computational load increases
Solution Approach 1:
The system performs the computationally intensive task of calculating output patterns in advance and stores them for rapid retrieval. During actual operation, only simple pattern comparison is needed, dramatically reducing computational complexity and response time while maintaining calculation accuracy
Solution Approach 2:
Instead of using computationally expensive algorithms during real-time operation, the patent replaces them with lightweight pattern comparison operations that require minimal computational resources. The complex calculations are performed once offline to create simple, easily comparable pattern representations
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 device ensures rapid and accurate adjustment to the required output, reducing computational time and preventing grid instability by optimizing power generation to meet demand, thus avoiding penalties and improving system stability.
Implementation Method 1
a voltage adjustment unit for controlling the solar panel terminal voltage to the voltage of the final output point of the output pattern
Data Source
AI summary
A voltage control device in an output limit situation of a solar power generation facility performs an algorithm to calculate output points adjacent to a limited output (PR) from the current output point of the solar power generation facility. The voltage control device may include a pattern calculation unit for calculating an output pattern comprised of the output points and a voltage adjustment unit for controlling the terminal voltage of the solar panel with the voltage of the final output point of the output pattern.