Band-Pass Storage Control for Renewable Power Variability

The patent segments the power variation compensation task by frequency bands. The control system divides the continuous power variation spectrum into multiple frequency bands and processes each band separately with dedicated control parameters, allowing selective compensation of dominant frequency components while ignoring less critical ones, thus reducing the required energy storage capacity.

The patent applies local quality by using different control parameters (such as different cutoff frequencies, gain values, or control strategies) for different frequency bands. This allows the system to optimize compensation performance for each specific frequency range where power variations are most problematic, rather than applying a uniform approach across all frequencies.

The patent introduces dynamic control parameters that adapt to the actual power variation characteristics in real-time. The control system continuously monitors the power output and adjusts control parameters (such as filter cutoff frequencies or compensating power levels) dynamically, allowing the energy storage system to operate at optimal points and avoid excessive stress conditions that would accelerate aging.

The patent changes the control parameters based on the frequency content and magnitude of power variations. By adjusting parameters such as the cutoff frequency of filters, gain values, or the time constants of control loops, the system can reduce the dynamic demands placed on the energy storage system while maintaining effective compensation for the most problematic frequency components.

The patent applies partial action by compensating only for the most significant frequency components of power variations rather than attempting to eliminate all variations. The control system identifies dominant frequency bands (typically through spectral analysis) and focuses compensation efforts on those specific bands, accepting that some less critical variations will remain uncompensated, thus reducing the required energy storage capacity.

The patent replaces a purely mechanical/sizing-based solution (oversizing the energy storage system) with a control-based solution. Instead of increasing the physical capacity of the energy storage system to handle all possible variations, the system uses intelligent control algorithms with frequency-selective filtering and adaptive parameter adjustment to achieve effective compensation with a smaller, more manageable system.