Synchronous DC-DC PV Converter for Low-Storage Solar Strings
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Solution Overview
Problem
Current solar power systems face inefficiencies in energy harvesting across the entire power spectrum due to varying solar energy influx and photovoltaic effects, along with regulatory challenges related to safety and voltage limits, particularly when generating power with larger strings of panels.
Innovation Solution
The development of advanced circuitry and methods that include DC-DC photovoltaic converters with synchronous phase control, low inductance, and low capacitance designs to enhance power generation efficiency, reduce energy storage, and minimize ripple in electrical outputs, allowing for higher operational voltage within regulatory limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If larger strings of photovoltaic panels are used to generate more power, then power generation capacity increases, but voltage may exceed regulatory limits and efficiency decreases due to varying solar energy influx
Solution Approach 1:
The system divides the photovoltaic array into multiple independent strings, each with its own DC-DC converter operating at maximum power point. This segmentation allows each string to be independently controlled and converted, preventing voltage exceedance while maintaining overall power generation capacity.
Solution Approach 2:
The DC-DC converters dynamically adjust conversion parameters including duty cycle, switching frequency, and output voltage to maintain regulatory compliance. The controllers modify these parameters in real-time based on solar energy influx variations, ensuring voltage remains within limits while maximizing power extraction.
2Power
If traditional DC-DC converters are used, then power conversion is achieved, but efficiency drops to 70-80% due to high inductance and capacitance energy storage
Solution Approach 1:
The patent extracts and removes the traditional high-value inductors and capacitors from the DC-DC converter circuitry. By eliminating these energy storage components, the system reduces parasitic energy storage and associated losses, achieving conversion efficiencies exceeding 99.5%.
Solution Approach 2:
The system replaces the mechanical/physical energy storage mechanism (inductors and capacitors) with an electronic control-based energy transfer mechanism. The DC-DC converters use synchronous switching and controlled rectification to transfer energy directly without significant storage, substituting physical energy storage with electronic energy management.
3Adaptability or versatility
If solar power systems operate under varying solar energy influx conditions, then adaptability to environmental changes is achieved, but power generation efficiency becomes inconsistent
Solution Approach 1:
Each DC-DC converter incorporates controllers that continuously monitor solar energy influx, output voltage, and current. Based on this feedback, the controllers dynamically adjust duty cycle and switching parameters to maintain maximum power point tracking (MPPT), ensuring consistent efficiency across varying environmental conditions.
Solution Approach 2:
The system employs dynamic control strategies where conversion parameters are continuously adjusted in real-time. The DC-DC converters adapt their operating points dynamically based on instantaneous solar irradiance and load conditions, maintaining optimal efficiency regardless of environmental variability.
4Power
If conventional solar power systems are designed, then basic power delivery is achieved, but complexity increases and efficiency decreases due to high energy storage requirements
Solution Approach 1:
The patent removes traditional energy storage components (large inductors and capacitors) from the power conversion architecture. This extraction simplifies the system structure, reduces component count, and eliminates the need for complex energy management strategies associated with high-value storage elements.
Solution Approach 2:
The DC-DC converters are designed to perform multiple functions simultaneously: power conversion, voltage regulation, maximum power point tracking, and ripple filtering. This multi-functionality consolidates what would traditionally require separate components, reducing overall system complexity while maintaining power delivery capability.
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
These solutions achieve high efficiency in solar power delivery, with efficiencies reaching up to 99.5% across a range of operational conditions, significantly improving power generation and delivery while maintaining stability and compliance with regulatory standards.
Implementation Method 1
accepting power from photovoltaic sources; The value of solar power for society has been known for many years. It offers clean energy but requires harnessing the energy and feeding it into electrical grid or other load.
Implementation Method 2
synchronous phase control to which said first low photovoltaic energy storage DC-DC photovoltaic converter and said second low photovoltaic energy storage DC-DC photovoltaic converter are switch timing responsive
Implementation Method 3
low inductance, low capacitance, and lower energy storage both at the input and output levels
Implementation Method 4
low inductance, low capacitance, and lower energy storage both at the input and output levels
Data Source
AI summary
A high efficiency solar power system combining photovoltaic sources of power (1) can be converted by a base phase DC-DC photovoltaic converter (6) and an altered phase DC-DC photovoltaic converter (8) that have outputs combined through low energy storage combiner circuitry (9). The converters can be synchronously controlled through a synchronous phase control (11) that synchronously operates switches to provide a conversion combined photovoltaic DC output (10). Converters can be provided for individual source conversion or phased operational modes, the latter presenting a combined low photovoltaic energy storage DC-DC photovoltaic converter (15) at string or individual panel levels.