Description:BACKGROUND
Field of Invention
[001] Embodiments of the present invention generally relate to a converter system and particularly to a high-gain boost converter system for optimizing low-voltage renewable energy sources in an islanded microgrid.
Description of Related Art
[002] The increasing demand for energy, coupled with concerns over environmental sustainability, has led to a significant shift towards renewable energy sources. Solar, wind, and other renewable systems offer a clean and sustainable alternative to conventional fossil fuels. However, these energy sources often generate low and variable voltage levels, which require efficient power conversion techniques to integrate them into existing electrical systems. Efficient energy conversion is essential to maximize energy utilization, minimize losses, and ensure reliable power supply for both grid-connected and islanded microgrid applications.
[003] Over the years, various power conversion technologies have been developed to address the challenges associated with low-voltage renewable energy systems. Traditional boost converters have been widely used to step up voltage levels, but they often suffer from high switching losses, component stress, and limited voltage gain. To improve performance, researchers have introduced advanced topologies such as interleaved boost converters, coupled inductor-based designs, and switched-capacitor circuits. While these approaches enhance efficiency and voltage gain, they also introduce complexities in control strategies and increase the cost of implementation.
[004] The need for high-efficiency power conversion solutions remains a critical focus for the integration of renewable energy sources. Addressing issues such as voltage instability, high component stress, and conversion losses is essential for ensuring the reliability of renewable-based microgrids. Further advancements in converter topologies and control methodologies are required to overcome the limitations of existing solutions and enhance the sustainability and practicality of renewable energy systems.
[005] There is thus a need for an improved and advanced high-gain boost converter system for optimizing low-voltage renewable energy sources in an islanded microgrid that can administer the aforementioned limitations in a more efficient manner.
SUMMARY
[006] Embodiments in accordance with the present invention provide a high-gain boost converter system for optimizing low-voltage renewable energy sources in an islanded microgrid. The system comprising a coupled inductor and switched capacitor circuit topology configured to achieve high voltage gain without extreme duty cycles. The system further comprising an interleaved topology configured to reduce input current ripple. The system further comprising a dynamic control strategy utilizing a Maximum Power Point Tracking (MPPT) algorithm for efficient energy extraction. The system further comprising a soft-switching circuitry implementing Zero Voltage Switching (ZVS) and Zero Current Switching (ZCS) to minimize switching losses. The system further comprising a thermal management subsystem for dissipating heat from power components. The system further comprising a fault protection circuitry integrated to ensure system reliability during grid isolation. The system further comprising a microprocessor communicatively connected to the energy sources. The microprocessor is configured to step up a low-voltage input from the energy sources via the coupled inductor and switched capacitor circuit topology; apply the dynamic control strategy with the Maximum Power Point Tracking (MPPT) algorithm to maximize energy extraction; reduce switching losses through the soft-switching circuitry using a Zero Voltage Switching (ZVS) and a Zero Current Switching (ZCS); monitor component stress; synchronize an interleaved converter to minimize input current ripple; and integrate the fault protection circuitry to isolate the system during grid instability.
[007] Embodiments in accordance with the present invention further provide a method for high-gain boost conversion for optimizing low-voltage renewable energy sources in an islanded microgrid. The method comprising steps of stepping up a low-voltage input from the energy sources via a coupled inductor and switched capacitor circuit topology; applying a dynamic control strategy with a Maximum Power Point Tracking (MPPT) algorithm; reducing switching losses through a soft-switching circuitry using a Zero Voltage Switching (ZVS) and a Zero Current Switching (ZCS); monitoring component stress; synchronizing an interleaved converter to minimize input current ripple; and integrating the fault protection circuitry to isolate the system during grid instability.
[008] Embodiments of the present invention may provide a number of advantages depending on their particular configuration. First, embodiments of the present application may provide a high-gain boost converter system for optimizing low-voltage renewable energy sources in an islanded microgrid.
[009] Next, embodiments of the present application may provide a boost converter system that achieves a significantly higher voltage boost compared to traditional converters, making it suitable for low-voltage renewable energy sources in islanded microgrids.
[0010] Next, embodiments of the present application may provide a boost converter system that minimizes energy losses, enhancing the overall efficiency of power conversion.
[0011] Next, embodiments of the present application may provide a boost converter system that optimizes voltage and current distribution across components, reducing stress on key elements like MOSFETs, inductors, and capacitors, thereby increasing their lifespan and reliability.
[0012] Next, embodiments of the present application may provide a boost converter system that ensure stable operation under varying input conditions, improving power quality and grid integration.
[0013] Next, embodiments of the present application may provide a boost converter system that achieves high performance with a more compact and lightweight structure, reducing material costs and making it easier to implement in microgrid systems.
[0014] These and other advantages will be apparent from the present application of the embodiments described herein.
[0015] The preceding is a simplified summary to provide an understanding of some embodiments of the present invention. This summary is neither an extensive nor exhaustive overview of the present invention and its various embodiments. The summary presents selected concepts of the embodiments of the present invention in a simplified form as an introduction to the more detailed description presented below. As will be appreciated, other embodiments of the present invention are possible utilizing, alone or in combination, one or more of the features set forth above or described in detail below.
BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The above and still further features and advantages of embodiments of the present invention will become apparent upon consideration of the following detailed description of embodiments thereof, especially when taken in conjunction with the accompanying drawings, and wherein:
[0017] FIG. 1A illustrates a high-gain boost converter system for optimizing low-voltage renewable energy sources in an islanded microgrid, according to an embodiment of the present invention;
[0018] FIG. 1B illustrates an exemplary high-gain boost converter system, according to an embodiment of the present invention; and
[0019] FIG. 2 depicts a flowchart of a method for high-gain boost conversion for optimizing low-voltage renewable energy sources in the islanded microgrid, according to an embodiment of the present invention.
[0020] The headings used herein are for organizational purposes only and are not meant to be used to limit the scope of the description or the claims. As used throughout this application, the word "may" is used in a permissive sense (i.e., meaning having the potential to), rather than the mandatory sense (i.e., meaning must). Similarly, the words “include”, “including”, and “includes” mean including but not limited to. To facilitate understanding, like reference numerals have been used, where possible, to designate like elements common to the figures. Optional portions of the figures may be illustrated using dashed or dotted lines, unless the context of usage indicates otherwise.
DETAILED DESCRIPTION
[0021] The following description includes the preferred best mode of one embodiment of the present invention. It will be clear from this description of the invention that the invention is not limited to these illustrated embodiments but that the invention also includes a variety of modifications and embodiments thereto. Therefore, the present description should be seen as illustrative and not limiting. While the invention is susceptible to various modifications and alternative constructions, it should be understood, that there is no intention to limit the invention to the specific form disclosed, but, on the contrary, the invention is to cover all modifications, alternative constructions, and equivalents falling within the scope of the invention as defined in the claims.
[0022] In any embodiment described herein, the open-ended terms "comprising", "comprises”, and the like (which are synonymous with "including", "having” and "characterized by") may be replaced by the respective partially closed phrases "consisting essentially of", “consists essentially of", and the like or the respective closed phrases "consisting of", "consists of”, the like.
[0023] As used herein, the singular forms “a”, “an”, and “the” designate both the singular and the plural, unless expressly stated to designate the singular only.
[0024] FIG. 1A illustrates a high-gain boost converter system 100 (hereinafter referred to as the system 100) for optimizing low-voltage renewable energy sources 102 in an islanded microgrid 104, according to an embodiment of the present invention. The system 100 may be adapted to collect energy generated from the energy sources 102 such as, but not limited to, a windmill, a solar panel, and so forth, and boost a low-voltage into a high-voltage. Embodiments of the present invention are intended to include or otherwise cover any type of the energy sources 102, including known, related art, and/or later developed technologies.
[0025] According to the embodiments of the present invention, the system 100 may incorporate non-limiting hardware components to enhance the processing speed and efficiency such as the system 100 may comprise the energy sources 102, the islanded microgrid 104, a circuit topology 106, an interleaved topology 108, a dynamic control strategy 110, a soft-switching circuitry 112, a thermal management subsystem 114, a fault protection circuitry 116, a microprocessor 118, and an interleaved converter 120. In an embodiment of the present invention, the hardware components of the system 100 may be integrated with computer-executable instructions for overcoming the challenges and the limitations of the existing systems.
[0026] In an embodiment of the present invention, a coupled inductor and switched capacitor may be accommodated in the circuit topology 106. The circuit topology 106 may be configured to achieve high voltage gain without extreme duty cycles.
[0027] In an embodiment of the present invention, the interleaved topology 108 may be configured to reduce input current ripple.
[0028] In an embodiment of the present invention, the dynamic control strategy 110 may utilize a Maximum Power Point Tracking (MPPT) algorithm for efficient energy extraction. The dynamic control strategy 110 may employ an adaptive duty cycle modulation to maintain a stable output voltage under variable input conditions. The dynamic control strategy 110 may employ predictive analytics to anticipate load variations and preemptively adjust converter parameters.
[0029] In an embodiment of the present invention, the soft-switching circuitry 112 may be adapted to implement Zero Voltage Switching (ZVS) and Zero Current Switching (ZCS) to minimize switching losses.
[0030] In an embodiment of the present invention, the thermal management subsystem 114 may be adapted for dissipating heat from power components. The thermal management subsystem 114 may regulate component temperatures using heat sinks, cooling fans, or a combination thereof to enhance reliability.
[0031] In an embodiment of the present invention, the fault protection circuitry 116 may be integrated to ensure a reliability of the system 100 during grid isolation.
[0032] In an embodiment of the present invention, the microprocessor 118 communicatively connected to the energy sources 102. The microprocessor 118 may be configured to step up a low-voltage input from the energy sources 102 via the coupled inductor and switched capacitor circuit topology 106. The microprocessor 118 may be configured to apply the dynamic control strategy 110 with the Maximum Power Point Tracking (MPPT) algorithm to maximize energy extraction. The microprocessor 118 may be configured to reduce switching losses through the soft-switching circuitry 112 using a Zero Voltage Switching (ZVS) and a Zero Current Switching (ZCS). The microprocessor 118 may be configured to monitor component stress. The component stress may be monitored on an Insulated Gate Bipolar Transistor (IGBT), a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET), a Power Spectral Density (PSD), and so forth.
[0033] The microprocessor 118 may be configured to synchronize an interleaved converter 120 to minimize input current ripple. The microprocessor 118 may be configured to integrate the fault protection circuitry 116 to isolate the system 100 during grid instability.
[0034] FIG. 1B illustrates an exemplary system 100, according to an embodiment of the present invention. In an embodiment of the present invention, the system 100 may optimize the energy sources 102 in the islanded microgrid 104. The energy sources 102 may be, but not limited to, solar panels, windmills, and so forth. The microprocessor 118 may continuously monitor the performance and voltage levels of the energy sources 102 to optimize power extraction. The microprocessor 118 may further utilizes the Maximum Power Point Tracking (MPPT) algorithm to maximize energy extraction from the energy sources 102. The microprocessor 118 may employ adaptive duty cycle modulation to maintain stable output voltage under varying conditions of energy sources 102.
[0035] FIG. 2 depicts a flowchart of a method 200 for the high-gain boost conversion for optimizing the energy sources 102 in the islanded microgrid 104, according to an embodiment of the present invention.
[0036] At step 202, the system 100 may step up the low-voltage input from the energy sources 102 via the coupled inductor and switched capacitor circuit topology 106.
[0037] At step 204, the system 100 may apply the dynamic control strategy 110 with the Maximum Power Point Tracking (MPPT) algorithm to maximize energy extraction.
[0038] At step 206, the system 100 may reduce switching losses through the soft-switching circuitry 112 using the Zero Voltage Switching (ZVS) and the Zero Current Switching (ZCS).
[0039] At step 208, the system 100 may monitor the component stress.
[0040] At step 210, the system 100 may synchronize the interleaved converter 120 to minimize input current ripple.
[0041] At step 212, the system 100 may integrate the fault protection circuitry 116 to isolate the system during grid instability.
[0042] While the invention has been described in connection with what is presently considered to be the most practical and various embodiments, it is to be understood that the invention is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the scope of the appended claims.
[0043] This written description uses examples to disclose the invention, including the best mode, and also to enable any person skilled in the art to practice the invention, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the invention is defined in the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements within substantial differences from the literal languages of the claims. , Claims:CLAIMS
I/We Claim:
1. A high-gain boost converter system (100) for optimizing low-voltage renewable energy sources (102) in an islanded microgrid (104), the system (100) comprising:
a coupled inductor and switched capacitor circuit topology (106) configured to achieve high voltage gain without extreme duty cycles;
an interleaved topology (108) configured to reduce input current ripple;
a dynamic control strategy (110) utilizing a Maximum Power Point Tracking (MPPT) algorithm for efficient energy extraction;
a soft-switching circuitry (112) implementing Zero Voltage Switching (ZVS) and Zero Current Switching (ZCS) to minimize switching losses;
a thermal management subsystem (114) for dissipating heat from power components;
a fault protection circuitry (116) integrated to ensure reliability during grid isolation; and
a microprocessor (118) communicatively connected to the energy sources (102), characterized in that the microprocessor (118) is configured to;
step up a low-voltage input from the energy sources (102) via the coupled inductor and switched capacitor circuit topology (106);
apply the dynamic control strategy (110) with the Maximum Power Point Tracking (MPPT) algorithm to maximize energy extraction;
reduce switching losses through the soft-switching circuitry (112) using a Zero Voltage Switching (ZVS) and a Zero Current Switching (ZCS);
monitor component stress;
synchronize an interleaved converter (120) to minimize input current ripple; and
integrate the fault protection circuitry (116) to isolate the system (100) during grid instability.
2. The system (100) as claimed in claim 1, wherein the component stress is monitored on an Insulated Gate Bipolar Transistor (IGBT), a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET), a Power Spectral Density (PSD), or a combination thereof.
3. The system (100) as claimed in claim 1, wherein the dynamic control strategy (110) employs an adaptive duty cycle modulation to maintain a stable output voltage under variable input conditions.
4. The system (100) as claimed in claim 1, wherein the dynamic control strategy (110) employs predictive analytics to anticipate load variations and preemptively adjust converter parameters.
5. The system (100) as claimed in claim 1, wherein the thermal management subsystem (114) regulates component temperatures using heat sinks, cooling fans, or a combination thereof to enhance reliability.
6. A method (200) for high-gain boost conversion for optimizing low-voltage renewable energy sources (102) in an islanded microgrid (104), the method (200) is characterized by steps of:
stepping up a low-voltage input from the energy sources (102) via a coupled inductor and switched capacitor circuit topology (106);
applying a dynamic control strategy (110) with a Maximum Power Point Tracking (MPPT) algorithm;
reducing switching losses through a soft-switching circuitry (112) using a Zero Voltage Switching (ZVS) and a Zero Current Switching (ZCS);
monitoring component stress;
synchronizing an interleaved converter (120) to minimize input current ripple; and
integrating the fault protection circuitry (116) to isolate the system (100) during grid instability.
7. The method (200) as claimed in claim 6, wherein the component stress is monitored on an Insulated Gate Bipolar Transistor (IGBT), a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET), a Power Spectral Density (PSD), or a combination thereof.
8. The method (200) as claimed in claim 6, wherein the dynamic control strategy (110) employs an adaptive duty cycle modulation to maintain a stable output voltage under variable input conditions.
9. The method (200) as claimed in claim 6, wherein the dynamic control strategy (110) employs predictive analytics to anticipate load variations and preemptively adjust converter parameters.
10. The method (200) as claimed in claim 6, wherein the Maximum Power Point Tracking (MPPT) algorithm maximizes energy extraction
Date: March 13, 2025
Place: Noida

Nainsi Rastogi
Patent Agent (IN/PA-2372)
Agent for the Applicant