Inverter Voltage Control for Stable Energy Storage Output
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Solution Overview
Problem
Existing battery cell packs face challenges in maintaining well-defined output voltage and current parameters due to internal and external non-idealities, particularly in systems with energy storage devices and buck-type power converters like multi-level inverters, where achieving stable closed-loop responses is difficult.
Innovation Solution
Implementing a control system that uses a reference waveform signal, error signal correction, and transfer functions with specific gain components to generate a control signal for the inverter circuit, ensuring stable output voltage and current parameters despite non-idealities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional control methods are used in energy storage systems with battery cell packs, then the system structure remains simple, but the output voltage and current parameters cannot be maintained at well-defined levels due to internal and external non-idealities
Solution Approach 1:
The patent implements a closed-loop control system where the actual output voltage is continuously measured and compared with a reference waveform signal to generate an error signal. This error signal is then processed through a transfer function to produce a correction signal that adjusts the inverter circuit's output, thereby maintaining well-defined voltage and current parameters despite non-idealities in the battery cell packs and external conditions.
Solution Approach 2:
The patent employs a transfer function with specific gain components (first gain component with second-order low-pass response and second gain component with first-order low-pass response) that dynamically adjusts the correction signal parameters. By manipulating these gain parameters and their frequency responses, the system achieves precise control over output voltage and current characteristics while compensating for system non-idealities.
2Stability of the object's composition
If conventional control is applied to buck-type power converters like multi-level inverters, then the device complexity remains low, but achieving stable closed-loop responses becomes difficult due to non-idealities
Solution Approach 1:
The patent implements a closed-loop control system where the actual output voltage is continuously measured and compared with a reference waveform signal to generate an error signal. This error signal is then processed through a transfer function to produce a correction signal that adjusts the inverter circuit's output, thereby maintaining well-defined voltage and current parameters despite non-idealities in the battery cell packs and external conditions.
Solution Approach 2:
The patent introduces a transfer function as an intermediary element between the error signal and the control signal. This transfer function, with its specific gain components and frequency responses, acts as a mediator that shapes the correction signal to ensure stable closed-loop response while isolating the control system from the non-idealities of the power converter and load conditions.
Data Source
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AI summary
Systems, methods and, software products for operating circuit with an energy storage module. The methods comprising: providing a reference waveform signal; acquiring an actual output voltage of the energy storage module; generating an error signal by combining the actual output voltage with the reference waveform signal; applying, to the error signal, a transfer function to obtain a correction signal; generating a control signal by combining the correction signal with the reference waveform signal; and using the control signal to govern an output voltage of an inverter circuit of the energy storage module.