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[IEEE 2019 Third International Conference on Intelligent Computing in Data Sciences (ICDS) - Marrakech, Morocco (2019.10.28-2019.10.30)] 2019 Third International Conference on Intelligent Computing in Data Sciences (ICDS) - Photovoltaic Interfaced Shunt Active Power Filter Under Online-Varying Parameters Based On Fuzzy Logic Controller And Adaptive Hysteresis Band Current Controller
摘要： This paper explores performances of the photo-voltaic plant associated with shunt active power ?lter (PV-SAPF). The model guarantees uninterrupted power quality, with the bene?t of PV power injection. In order to improve the PV-SAPF dynamics and to reduce harmonic current distortion, the control of the proposed system is based on: 1) instantaneous PQ strategy for reference harmonic term identi?cation, 2) fuzzy logic controller for the Maximum power point tracking MPPT of the PV, 3) fuzzy logic based controller for DC capacitor voltage regulation, and 4) adaptive hysteresis current controller (AHCC) for the switching signals of the PV-SAPF system. The suggested control is performed in a Matlab/Simulink environment and compared with the conventional one using P& O algorithm, proportional integral controller and a ?xed hysteresis band controller. The results show that the proposed control adapted to PV-SAPF gives low value of total harmonic distortion THD and better dynamic performance in terms of references tracking under abrupt variation of the functioning point of the nonlinear load while applying a variable PV irradiance pro?le.
关键词： Fuzzy logic controller (FLC),Adaptive hysteresis current controller (AHCC),PV-SAPF,Dynamic performance,Total harmonic distortion (THD)
更新于2025-09-16 10:30:52
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[IEEE 2019 8th International Conference on Systems and Control (ICSC) - Marrakesh, Morocco (2019.10.23-2019.10.25)] 2019 8th International Conference on Systems and Control (ICSC) - Performance Evaluation of Neural Network Controlled Grid-Connected Photovoltaic System for Power Quality Enhancement
摘要： This paper studies a neural network (NN) control for three-phase grid-connected Photovoltaic (PV) system. This study aims to improve the performances of the system, ensure a high quality of the Total Harmonic Distorsion and extract the maximum power while ensuring unity power factor. A neural network controller is used instead of the two PI regulation loop for grid currents. The Levenberg Marquardt (LM) algorithm is used to train the NN controller and the validation and training data of the utilized neural controller are obtained by simulation of the entire system with the PI controllers calculated for variation of solar irradiance. The simulation study shows that the neural controller indicates significantly more enhanced performance than that of the PI controller, including faster response times, lower overshoot and Total Harmonic Distortion (THD).
关键词： Neural Network Control,Levenberg Marquardt Algorithm,Photovoltaic System,Total Harmonic Distortion,Power Quality
更新于2025-09-16 10:30:52
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[IEEE 2019 8th International Conference on Modeling Simulation and Applied Optimization (ICMSAO) - Manama, Bahrain (2019.4.15-2019.4.17)] 2019 8th International Conference on Modeling Simulation and Applied Optimization (ICMSAO) - Harmonic analysis of high penetration level of Photovoltaic generation in distribution network and solution studies
摘要： The high penetration level of Photovoltaic (PV) generation in distribution network reduces carbon emissions but also becomes problematic in terms of network management. Harmonic distortion is the main factor studied in this paper and a typical three-bus distribution network is built in MATLAB/Simulink to understand the harmonics problem. Results show that current harmonics are more vulnerable to fluctuate compared to voltage harmonics. Based on existing harmonic standards, total demand distortion of current (TDDi) is evaluated to estimate maximum PV penetration level at Point of Common Coupling (PCC), and the maximum acceptable TDDi at each bus differs according to specific loading and short-circuit levels. Meanwhile, total harmonic distortion of current (THDi) at inverter outputs represents inverter performance. Instead of assessing at standard test conditions (STC), the impact of irradiance variations is studied. Low irradiance results in an increased THDi of the inverter whilst doesn’t explicitly affect TDDi at PCC. A simple and low-cost solution is proposed to dynamically vary the settings of inverter’s filter elements against irradiance, and harmonic distortion at low irradiance of the inverter is successfully mitigated.
关键词： power system,total demand distortion,total harmonic distortion,irradiance,PV penetration level
更新于2025-09-12 10:27:22
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[IEEE 2019 IEEE International Conference on Automatic Control and Intelligent Systems (I2CACIS) - Selangor, Malaysia (2019.6.29-2019.6.29)] 2019 IEEE International Conference on Automatic Control and Intelligent Systems (I2CACIS) - Limiting THD of Grid Connected Photovoltaic System using PWM Switching Frequency Selection Based on Solar Irradiance Changing
摘要： Photovoltaic (PV) system becomes the best alternative energy to produce electricity that can replace fuel resource. Grid Connected Photovoltaic (GC-PV) system will supply the AC power generated to the utility grid then distributed to the consumer. Solar irradiance in Malaysia varies daily and throughout the year. The consequence of low irradiance level is the output of the PV array is low and thus the input of the inverter relatively becoming low. The inverter will exhibit large non-linearity when the inverter is operating at low power input during low level of solar irradiance and Total Harmonic Distortion (THD) will increased. Pulse Width Modulation (PWM) techniques that are Continuous Pulse Width Modulation (CPWM) and Discontinuous PWM (DPWM) are implemented in the inverter control of the GC-PV system using MATLAB/Simulink environment to investigate the effect of switching frequency on THD at different level of solar irradiance. THD is limit within standard requirement by selecting appropriate value of switching frequency. Results shows that CPWM has better performance in THD and switching losses at selected switching frequency.
关键词： total harmonic distortion,inverter,pulse width modulation,switching frequency,grid connected photovoltaic,solar irradiance
更新于2025-09-11 14:15:04
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[IEEE 2018 International Power Electronics Conference (IPEC-Niigata 2018-ECCE Asia) - Niigata (2018.5.20-2018.5.24)] 2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia) - Optimized Variable On-Time Control for LED Lighting Driver
摘要： This paper focus on how to implement variable on-time control to predictive boundary conduction mode boost PFC converter for driving LED lighting applications. Normally, the constant on-time control is implemented in predictive PFC converter, which leads to high THD of input line current. Varies of variable on-time control methods have been proposed to improve the THD of input line current. However, most of the proposed variable on-time calculation methods are too complex to be implemented in predictive control. In order to implement the variable on-time control to predictive control, a simple but very accurate variable on-time calculation method is applied. The optimized variable on-time control takes very short calculation time in DSP controller, hence it can be implemented in predictive control. The effectiveness of the proposed method which can reduce THD of line current is demonstrated on a 100 V input and 400 V/30 W output PFC prototype.
关键词： Predictive control,power factor correction,boundary conduction mode,zero-crossing point,total harmonic distortion.,power factor
更新于2025-09-11 14:15:04
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[IEEE 2018 IEEE International Conference on System, Computation, Automation and Networking (ICSCAN) - Pondicherry, India (2018.7.6-2018.7.7)] 2018 IEEE International Conference on System, Computation, Automation and Networking (ICSCA) - Power Factor Correction in Z-Source Resonant Converter for Wireless Power Transfer Applications
摘要： In this paper the Z-source converter is introduced to power factor correction (PFC) applications. The concept is demonstrated through a wireless power transfer (WPT) system for electric vehicle battery charging, namely Z-source resonant converter (ZSRC). Due to the Z-source network (ZSN), the ZSRC inherently performs PFC and regulate the system output voltage simultaneously, without adding extra semiconductor devices and control circuitry to the conventional WPT system such as conventional PFC converters do. In other words, the ZSN can be categorized as a family of the single stage PFC converters. In addition, the ZSN is suitable for high power applications since it is immune to shoot-through states, which increases reliability and adds a boost feature to the system. The ZSRC-based WPT system operating principle is described and analyzed in this paper. Simulations, and experimental results based on a 1-kW prototype with 20-cm air gap between the system primary and secondary side are presented to validate the analysis, and demonstrate the effectiveness of the ZSN in the PFC of the WPT system.
关键词： Power factor correction (PFC),Wireless Power Transfer (WPT),Total Harmonic Distortion (THD),Z-source resonant converter (ZSRC),Series resonant converter (SRC)
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) || Sliding Mode Control of DFIG Driven by Wind Turbine with SVM Inverter
摘要： In this paper, a direct Sliding Mode Control (SMC) of Doubly Fed Induction Generator (DFIG) driven by wind turbine with Space Vector Modulation (SVM) inverter is presented. The SMC is used to track the stator active and reactive power their references. The SVM inverter is used to improve the quality of the energy generated by DFIG which allows the minimizing of stator current harmonics and wide linear modulation range. Simulation results show that the proposed control give good performance and good quality of the energy where the THD of the stator current of the DFIG has small value.
关键词： Total Harmonic Distortion,Doubly Fed Induction Generator,Space Vector Modulation,Sliding Mode Control,Wind Turbine
更新于2025-09-10 09:29:36
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[IEEE 2018 International Conference on Smart Electric Drives and Power System (ICSEDPS) - Maharashtra State, India (2018.6.12-2018.6.13)] 2018 International Conference on Smart Electric Drives and Power System (ICSEDPS) - A Preliminary Study on Harmonics Generated by the Grid-Connected PV System on Distribution
摘要： Increased generation of Power by Solar Photovoltaic (PV) system is seen as an alternative to fulfill the increased demand of electricity. And hence the increased usage of electrical load devices causes the non-sinusoidal waveforms of current and voltage into the distribution system which is the major reason for increasing operating temperature of transformer, leading to deterioration of the insulation and potential reduction in its life time. Hence this paper sheds some light on the effects of THDi and THDv (Total Harmonics Distortion) and how it affects the life of any distribution transformer. The study is implemented by using MATLAB/Simulink version R2015b software.
关键词： temperature rise,nonlinear load,Distribution transformer,life expectancy,Harmonic distortion
更新于2025-09-10 09:29:36
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[IEEE 2017 International Conference on Current Trends in Computer, Electrical, Electronics and Communication (CTCEEC) - Mysore, India (2017.9.8-2017.9.9)] 2017 International Conference on Current Trends in Computer, Electrical, Electronics and Communication (CTCEEC) - Mitigation of Lower Order Harmonics in a Grid-Connected Single-Phase PV Inverter using Shunt Active Filter
摘要： In this paper, a novel technique is proposed for mitigating lower order harmonics for single phase PV inverter using harmonic compensation. Step up transformer is used boost the voltage as per requirement of the grid. However, the implemented system will not introduce any lower order harmonics in the grid, but there are little chances of lower order harmonics, because of the dead time of inverter, core saturation and magnetizing current of the transformer, etc. In this paper, a unique approach is being presented which mitigates lower order harmonics using inverter current control. In this paper, adaptive harmonic compensation technique with additional active filter is being presented before feeding a supply to the grid. To obtain better control proportional resonant integral (PRI) controller is integrated. The advantage of using PRI controller is; it eliminates DC component from the control loop. In this paper, a PRI controller and LMS adaptive harmonic filter are also been discussed in great detail. In this paper, two systems are considered and compared one with an adaptive harmonic filter using SPWM, and in the second system, active filter is added before feeding inverter output to the step up transformer. Hence the first system is explained in great detail and for second system illustration of the active filter and obtained results are compared.
关键词： LMS adaptive filter,single phase PV inverter,harmonic distortion,PRI controller
更新于2025-09-09 09:28:46
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[IEEE 2018 International Conference on Advances in Computing, Communications and Informatics (ICACCI) - Bangalore, India (2018.9.19-2018.9.22)] 2018 International Conference on Advances in Computing, Communications and Informatics (ICACCI) - RTC Based Solar Power Multi-Level Inverter
摘要： Power quality is a very important aspect in power system. The harmonics can be produced from various power electronics devices. This paper proposes a new fifteen level cascaded multilevel inverter. The inverter battery is charged using both solar and from service main. Solar is used to charge battery during day time and service main for the night time. If solar fails in day time the battery charges from service main. The battery charger will not take any supply from the service main during peak hours. Charging of the inverter battery during peak hours from the service main is isolated using real time clock circuit (RTC) controlled relay. Use of multilevel inverter helps to reduce the percentage of total harmonic distortion (THD) considerably.
关键词： Power Quality,Real time clock circuit (RTC),Total harmonic distortion (THD),Multi-level Inverter,Pulse width modulation (PWM)
更新于2025-09-09 09:28:46