HIGH VOLTAGE REGULATED [350V AND 0.92AMPS] DC-DC BOOST CONVERTER FOR RENEWABLE ENERGY APPLICATIONS

Abstract

7. ABSTRACT High voltage regulated [350V and 0.92amps] DC-DC boost converter for renewable energy applications. A DC-DC boost converter configured with a FPGA controller (XC6SLX97TQGI44C Spartan-6) for implementation of a 350V and 0.92 Amps DC-DC boost converter wherein the inverter circuit converts the solar panels 20V DC input into 20V AC, the linear boosting transformer increases the 20V AC into 350V AC wherein a rectifier circuit further converts the 350V AC into 350V DC wherein the driver circuits provide the gate pulses to the switches and the output of 350 volts is regulated using the FPGA digital controller-based artificial algorithm wherein the controller also achieves time domain specifications such as rise time, undershoot, overshoot, and slew rate [FIG. 1].

Specification

Description:4. DESCRIPTION
HIGH VOLTAGE REGULATED [350V AND 0.92AMPS] DC-DC BOOST CONVERTER FOR RENEWABLE ENERGY APPLICATIONS TECHNICAL FIELD
[0001] The present invention relates to renewable energy systems and methods. The present invention also relates to converter systems and methods for renewable energy applications. Further, the invention relates to DC-DC boost converters. Further, the present invention specifically relates to high voltage regulated [350V and 0.92amps] DC-DC boost converter for renewable energy applications.
BACKGROUND OF THE INVENTION
[0002] With increased penetration of renewable energy sources and energy storage, high gain DC/DC power electronic converters find increased applications in, for example, green energy systems. They can be used to interface low voltage sources like fuel cells, photovoltaic (also called PV or solar) panels, batteries, and the like with a high voltage (e.g., 400 V) bus in a DC microgrid system. These converters also find applications in different types of electronic equipment such as high-intensity-discharge (HID) lamps for automobile headlamps, servo-motor drives, X-ray power generators, computer periphery power supplies, and uninterruptible power supplies (UPS).
[0003] Conventional DC/DC converter topologies feature varying levels of integration between commonly used topologies, such as boost and flyback topologies, in order to provide a high-gain. For example, in embodiment of prior art, DE102009028973A1 teaches a half-bridge converter for a battery system and a battery system. The DC / DC converter circuit according to the invention comprises at least two DC / DC converters and a low pass, the DC / DC converters each having an input side and an output side and the DC / DC converter are connected in series with one another on their output side and the low-pass filter is connected downstream of the series-connected DC / DC converters for smoothing an output voltage generated by the DC / DC converters on their output side.
[0004] In another embodiment of prior art, US20190097543A1 teaches a bidirectional DC converter assembly which includes two serially-arranged DC/DC converters. The first converter is a buck (or a buck/boost) converter to be connected to a high-voltage (HV) level of an electric vehicle. The second converter is a series resonant switching converter to be connected to a low-voltage (LV) of the vehicle. The series resonant switching converter of the second converter is formed by a DC/AC converter, a transformer, and an AC/DC converter, which are serially arranged in the stated order between the first converter and the LV level. A bidirectional peak current controller is associated with the first converter. The peak current controller is realized by a current measurement at an inductor of the first converter. The peak current controller uses the coil current value, which is modified with an offset value and thus has a constant sign, as a set point in controlling the first converter.
[0005] In one more embodiment of prior art, US20220006378A1 teaches an adaptive DC-DC Boost arrangement including a circuit board with a plurality of electronic components mounted thereon, implementing an adaptive DC-DC boost converter circuit and a boost decoupling capacitor. The adaptive DC-DC boost converter circuit comprises a DC-DC boost converter having a converter set value input, a boost supply input, and a boost voltage output, and an adaptive DC-DC boost control unit having a control input and a control output. An acoustical noise suppression filter is present having a filter input connected to the control output of the adaptive DC-DC boost control unit and a filter output connected to the converter set value input of the DC-DC boost converter.
[0006] The conventional prior art DC-DC boost converters lack hardware implementation of a 350-volt and 0.92-amp boost converter, and the converters were employed only with traditional PI and PID algorithms, but the artificial intelligence algorithms were not emphasized. A need therefore exists for an improved DC-DC boost converter that addresses these limitations by implementing a hardware FPGA controller using artificial intelligence algorithms for better voltage regulation and fast transient response. Based on the foregoing, a need therefore exists for an improved high voltage regulated [350V and 0.92amps] DC-DC boost converter for renewable energy applications, as discussed in greater detail herein.
SUMMARY OF THE INVENTION
[0007] The following summary is provided to facilitate an understanding of some of the innovative features unique to the disclosed embodiment and is not intended to be a full description.
[0008] It is, therefore, one aspect of the disclosed embodiments to provide for an improved DC-DC boost converter system and method for renewable energy applications.
[0009] It is another aspect of the disclosed embodiments to provide for an improved high voltage DC-DC boost converter for renewable energy applications.
[0010] It is further aspect of the disclosed embodiments to provide for an improved high voltage regulated [350V and 0.92amps] DC-DC boost converter for renewable energy applications.
[0011] High voltage regulated [350V and 0.92amps] DC-DC boost converter for renewable energy applications. A DC-DC boost converter configured with a FPGA controller (XC6SLX97TQGI44C Spartan-6) for implementation of a 350V and 0.92 Amps DC-DC boost converter wherein the inverter circuit converts the solar panels 20V DC input into 20V AC, the linear boosting transformer increases the 20V AC into 350V AC wherein a rectifier circuit further converts the 350V AC into 350V DC wherein the driver circuits provide the gate pulses to the switches and the output of 350 volts is regulated using the FPGA digital controller-based artificial algorithm wherein the controller also achieves time domain specifications such as rise time, undershoot, overshoot, and slew rate.
[0012] The high-voltage DC-DC boost converter was implemented on open loop and closed loop systems wherein the voltage regulation and the time domain parameters were achieved through the artificial algorithm-based closed loop system wherein the converter was also implemented in hardware using FPGA controller-based algorithms to obtain better voltage regulation and fast transient response.
DETAILED DESCRIPTION
[0013] The values and configurations discussed in these non-limiting examples can be varied and are cited merely to illustrate at least one embodiment and are not intended to limit the scope thereof.
[0014] The embodiments now will be described more fully hereinafter with reference to the accompanying drawings, in which illustrative embodiments of the invention are shown. The embodiments disclosed herein can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Like numbers refer to like elements throughout. As used herein, the term "and/or" includes all combinations of one or more of the associated listed items.
[0015] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
[0016] Invention: High voltage regulated [350V and 0.92amps] DC-DC boost converter for renewable energy applications. A DC-DC boost converter configured with a FPGA controller (XC6SLX97TQGI44C Spartan-6) for implementation of a 350V and 0.92 Amps DC-DC boost converter wherein the inverter circuit converts the solar panels 20V DC input into 20V AC, the linear boosting transformer increases the 20V AC into 350V AC wherein a rectifier circuit further converts the 350V AC into 350V DC wherein the driver circuits provide the gate pulses to the switches and the output of 350 volts is regulated using the FPGA digital controller-based artificial algorithm wherein the controller also achieves time domain specifications such as rise time, undershoot, overshoot, and slew rate.
[0017] The high-voltage DC-DC boost converter was implemented on open loop and closed loop systems wherein the voltage regulation and the time domain parameters were achieved through the artificial algorithm-based closed loop system wherein the converter was also implemented in hardware using FPGA controller-based algorithms to obtain better voltage regulation and fast transient response.
[0018] Working of the invention: The experimental setup of the high voltage converter is depicted in Figure 1. The regulated power supply is used to provide the input of 20V DC to the DC-DC converter. The converter topology consists of inverter and rectifier bridges. The inverter bridge converts the input 20V DC voltage into 20V AC voltage. The boosting transformer is present between the two bridges to increase the 20V AC voltage into 350V AC voltage. The six switches of the converter are triggered using the driver circuits. The rectifier bridge converts the 350V AC voltage into a 350V DC voltage. The voltage sensing circuit is used to provide the feedback voltage to the converter. The FPGA (Field Programmable Gate Array) controller with artificial algorithms is used to compensate for the variations and to provide a stable voltage of 350V. The compact data acquisition module is used to determine the time domain specifications of the converter interfaced with the CPU. The hardware results of the converter were depicted in Figures 2, 3, and 4. In Figure 2, the switching pulses of the converter were depicted. In Figure 3, waveforms of the voltage and current in the proposed converter's transformer were depicted. In Figure 4, the voltage and current waveforms of the high-voltage converter were depicted.
[0019] The high-voltage DC-DC boost converter was implemented using the FPGA controller-based artificial algorithms (PIO and Fuzzy control algorithms) to obtain better voltage regulation and fast transient response. The line and load analysis of the DC-DC boost converter was performed for the experimental method by tuning various line and load values. The line analysis was done by tuning various input voltage values and keeping the load resistance RL =500 Q constant. The load analysis was done by tuning various load resistance values and keeping the input voltage, Vi=20V constant. The converter was operated with a switching frequency of25 kHz and the presence of zero current switching (ZCS) recovers the stored energy from the magnetics. The input power, output power and transient characteristics were measured and analysed for different artificial algorithms. The high-voltage converter successfully achieved an output DC voltage of 350V and an output current of 0.92A, based on an input DC voltage of 20V and an input current of 17 A. The converter has gained a rise time of 97.797 ms, an undershoot of 0.955%, and an overshoot of 0.505%. The converter has achieved a high efficiency of 94.71 % from the output power of 322 W and the input power of 340 W.
[0020] The topology of the proposed DC-DC boost converter has been depicted in Figure 5. Vi represents the input DC voltage source, S1 to S6 are active switches, D1-D6 correspond to the body diodes of switches S1 to S6, D7 and D8 serve as power diodes, C denotes the filter capacitor, T signifies the linear transformer, L stands for inductance, and R represents the load resistance. A power switch serves the dual purpose of providing current protection and establishing an electrical connection from a voltage source to a load. The diodes D1-D6, associated with the switches, create a path for load current, when the switch is in the OFF condition. To elevate the input DC voltage from 20 V to the output DC voltage of 350 V, a booster transformer is incorporated in this converter. An inductor is utilized on the output side of the booster transformer to smooth the current waveform by storing energy. Diodes D7 and D8 are employed to prevent current flow in the reverse direction. The filter capacitor C is implemented to reduce the ripples of the rectified voltage.
[0021] The Simulink diagram of the open loop converter has been depicted in Figure 6. The open loop converter had been simulated using the MATLAB Simulink for the input voltage of 20 V, and a switching frequency of 25 kHz. After simulation, the converter attained the output voltage of 350 V. In open loop converter system, the output voltage was unregulated and obtained the output current of 1 A. Since the open loop converter produces unregulated voltage, closed loop control algorithms are implemented for the better voltage regulation even though the load and line values are varied.
[0022] It will be appreciated that variations of the above-disclosed and other features and functions, or alternatives thereof, may be desirably combined into many other different systems or applications. Also, that various presently unforeseen or unanticipated alternatives, modifications, variations or improvements therein may be subsequently made by those skilled in the art which are also intended to be encompassed by the following claims.
, Claims: 
5. CLAIMS
1. A high voltage regulated [350V and 0.92amps] DC-DC boost converter for renewable energy applications, comprising:
a DC-DC boost converter configured with a FPGA controller (XC6SLX97TQGI44C Spartan-6) for implementation of a 350V and 0.92 Amps DC-DC boost converter wherein the inverter circuit converts the solar panels 20V DC input into 20V AC, the linear boosting transformer increases the 20V AC into 350V AC wherein a rectifier circuit further converts the 350V AC into 350V DC wherein the driver circuits provide the gate pulses to the switches and the output of 350 volts is regulated using the FPGA digital controller-based artificial algorithm wherein the controller also achieves time domain specifications such as rise time, undershoot, overshoot, and slew rate.
2. The converter as claimed in claim 1 wherein the high-voltage DC-DC boost converter was implemented on open loop and closed loop systems wherein the voltage regulation and the time domain parameters were achieved through the artificial algorithm-based closed loop system.

6. SIGNATURE WITH DATE

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