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[IEEE 2018 IEEE Energy Conversion Congress and Exposition (ECCE) - Portland, OR, USA (2018.9.23-2018.9.27)] 2018 IEEE Energy Conversion Congress and Exposition (ECCE) - Evaluation of 2.5 kV Silicon Carbide MOSFET for 1.5 kV Solar Inverter Application
摘要： 1.5 kV DC link voltage has been a trend for the solar industry. Moving from 1 kV to 1.5 kV DC voltage can increase string length, enhance inverter conversion ability, increase array block sizes, and improve performance. Multilevel converters are the natural choices while the control becomes more complicated. If a simple two-level converter is adopted, the 1.7 kV device may not be applicable considering the voltage derating for certain failure rate. Therefore, devices with higher blocking voltage should be considered. This paper reports for the first time the performance characterization of 2.5 kV Silicon Carbide (SiC) MOSFET. The potential application of this device for 1.5 kV solar inverter is also evaluated.
关键词： Solar Inverter,Silicon Carbide MOSFET,Silicon Carbide converter
更新于2025-09-23 15:22:29
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[IEEE 2018 International Conference on Control, Power, Communication and Computing Technologies (ICCPCCT) - Kannur,Kerala, India (2018.3.23-2018.3.24)] 2018 International Conference on Control, Power, Communication and Computing Technologies (ICCPCCT) - A Brief Study of Solar Home Inverters
摘要： In every field of human development, electricity usage is increasing promptly. Utilization of solar energy is a way to meet the energy demand. The solar inverter is one such device, which makes the solar energy to usable form. In this paper, three major inverters are presented. The voltage source and current source inverters, stand-alone and grid-connected inverters and, square, modified square and sine wave inverters come under the classification. An open loop strategy is considered for the MATLAB Simulation of the three main types of PWM inverters available in the market. A brief description of PV array, charge controller and battery is also presented in this paper.
关键词： Solar Inverter,SPWM,PWM,Off-Grid inverters,Single phase inverters,Power Inverters
更新于2025-09-23 15:22:29
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[IEEE 2019 8th International Conference on Renewable Energy Research and Applications (ICRERA) - Brasov, Romania (2019.11.3-2019.11.6)] 2019 8th International Conference on Renewable Energy Research and Applications (ICRERA) - The Closed Loop Controller Gain Characterization for Enhanced Current Quality in Solar Inverters Coupled with Weak Grid
摘要： Majority of solar installations are coming up in remote locations where the stiffness of the grid is very weak, enforces to connect solar inverters to weak grid. In weak grid scenario, solar inverter would inject harmonic current into the grid that affect the power quality of the system. The solar inverters are designed to operate with stiff grid in which the closed (feedback and feed forward) loop control is planned by considering absolute decoupling between the direct and quadrature grid injected current. With the conventional design speci?cations in weak grid scenario, the absolute decoupling between the direct and quadrature current cannot be achieved due to grid inductance. The improper decoupling would create the oscillations in the grid injected current that result in increased harmonic distortion. To compensate the current oscillations, the current controller feedback loop gain need to be designed by accessing the degree of coupling. Since the grid injected current sensed at the point of common coupling and transformed to DC quantities (direct current id and quadrature current iq) using synchronous angle, the same current oscillations appear in d-axis and q-axis current control loop. In this work, the d-axis and q-axis loop oscillations with respect to grid inductance are analyzed analytically. Based on the analysis the d-axis and q-axis PI controllers are designed independently unlike conventional PI controller to ensure not only faster dynamic response of the system but also improved power quality.
关键词： closed loop control,weak grid,PI controllers,current THD,Grid connected solar inverter,single stage transformer less grid connected inverter,Power quality
更新于2025-09-23 15:19:57
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[IEEE 2018 9th IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG) - Charlotte, NC, USA (2018.6.25-2018.6.28)] 2018 9th IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG) - Calculations for Asymmetrical Fault Synthesis for Evaluating Ride-Through of Grid Connected Solar Inverters
摘要： Evaluating the efficacy of grid-tied solar inverters requires specific tests to be conducted. With the ability to provide a simulated grid environment, various voltage and frequency conditions can be applied to a device under test (DUT) to assess its performance. A characteristic such as ride-through capability requires the device to be exposed to specified voltage events to industry standards. However, validate interconnections between the grid simulator environment, inverters, and grid-tie transformers provide challenges in determining the voltages to output in the grid simulator that are seen by the inverter. This paper details the voltage sag analysis used to obtain grid-side voltage references based on different transformer connections and type of sag condition. Formulas are presented based on the specific type of connection and voltage sag event. Simulation and experimental data are provided to confirm the calculations based on the equations given.
关键词： ride-through,Asymmetrical,voltage sag,IEEE 1547,solar inverter
更新于2025-09-10 09:29:36
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[Lecture Notes in Networks and Systems] Renewable Energy for Smart and Sustainable Cities Volume 62 (Artificial Intelligence in Renewable Energetic Systems) || Validation of Three Level Solar Inverter Based on Tabu Search Algorithm
摘要： Providing electrical energy for oil and gas extraction sites can be a real challenge especially for a large oil and gas company like Sonatrach. Solar energy can be great solution for this issue. This study presents an ef?cient way to convert electrical energy from DC to AC using a modulation strategy called selective harmonic elimination (SHE); this method will be used to optimize the performance of a three level solar inverter for standalone power system. Harmonic pollution is a very common problem in the ?eld of power electronics, this problem can cause multiple problems for power converters and electrical devices and also reduce their lifespan. The SHE modulation strategy allows the elimination of low order harmonics and also control the amplitude of the fundamental component of the output voltage spectrum. In this paper Tabu Search Algorithm (TSA) is used to determine optimum switching angles for a three level solar inverter. Simulation and experimental results are presented in this work.
关键词： Optimization,Tabu Search Algorithm,Solar inverter,Harmonic elimination
更新于2025-09-10 09:29:36
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[IEEE 2018 IEEE Energy Conversion Congress and Exposition (ECCE) - Portland, OR, USA (2018.9.23-2018.9.27)] 2018 IEEE Energy Conversion Congress and Exposition (ECCE) - Passive Filter Design to Mitigate Dead-Time Effects in Three-Level T-Type NPC Transformerless PV Inverters Modulated with Zero CMV PWM
摘要： Common-mode voltage (CMV) can cause common-mode (CM) current in transformerless PV inverters. In practice, large CM choke is usually required to suppress the CM current. Alternatively, zero common-mode voltage (ZCMV) modulation can be applied to eliminate the CMV. But in practical applications, CMV spikes are inevitable due to the dead-time effect. Such dead-time effect can be mitigated by special PWM sequence design, however, at the expense of increasing switching losses. In this paper, our study addresses this issue by using the DC neutral-point connected LCL (NC-LCL) filter. As the differential-mode (DM) output quality is undermined with ZCMV PWM, the LCL filter parameters must be carefully designed, where both CM and DM filters need to be considered. In addition, filter design for conventional phase disposition (PD) modulation is also included as a comparison. Both simulation results and experimental results are provided for verification.
关键词： Photovoltaic (PV) solar inverter,LCL filter design,Phase disposition modulation,T-type 3L-NPC (PD) inverter,Zero CMV modulation
更新于2025-09-04 15:30:14