scholarly journals An Innovative Bidirectional DC-AC Converter to Improve Power Quality in a Grid-Connected Microgrid

2018 ◽  
Author(s):  
Sebastien Bissey ◽  
Sebastien Jacques ◽  
Cedric Reymond ◽  
Jean-Charles Le Bunetel
Keyword(s):  
Power Quality ◽  
High Efficiency ◽  
Storage System ◽  
Harmonic Distortion ◽  
Electricity Consumption ◽  
Wide Band ◽  
Electrical Energy ◽  
Voltage Source ◽  
Peak Time ◽  
Uninterruptible Power

The management of the electrical energy still raises a huge interest for end-users at the household level. Home electricity management systems (HEMS) have recently emerged both to warrant uninterruptible power and high power quality, and to decrease the cost of electricity consumption, by either shifting it in off peak time or smoothing it. Such a HEMS requires a bidirectional DC-AC converter, specifically when an energy transfer is required between a storage system and the AC-grid, and vice versa. This article points out the relevance of an innovative topology based on sinusoidal waveforms from the generation of sine half-waves. Such a topology is based on a DC-DC stage equivalent to an adjustable output voltage source and a DC-AC stage (H-bridge) which are in series. The results of a complete experimental procedure prove the feasibility to improve the power quality of the output signals in terms of total harmonic distortion (THD-values about 5%). The complexity of the proposed converter is minimized in comparison with multilevel topologies. Finally, wide band-gap semiconductor devices (SiC MOSFETs) are helpful both to warrant the compactness and the high efficiency (about 96%) of the bidirectional converter, whatever its operation mode (inverter or rectifier mode).

Comparative Study of Two Different Converters with its Controller for Grid Connected WECS with PMSG

2019 ◽  
Vol 8 (2) ◽  
pp. 1-24
Author(s):  
Sasmita Behera ◽  
Matruprasad Jyotiranjan
Keyword(s):  
Power Quality ◽  
Pulse Width Modulation ◽  
Harmonic Distortion ◽  
Synchronous Generator ◽  
Electrical Energy ◽  
Maximum Power ◽  
Multilevel Inverter ◽  
Resistive Load ◽  
Power Extraction ◽  
Point Tracking

Wind is a source for generating clean and economical electrical energy with a proper harnessing mechanism. For a wind energy conversion system (WECS), maximum power extraction with optimum power quality is required. In this article, the grid power quality is enhanced, using a multilevel inverter which provides smoother and pure sinusoidal waves as compared to two-level inverter by decreasing total harmonic distortion (THD) in WECS with a permanent magnet synchronous generator (PMSG). Also, a maximum power point tracking (MPPT) algorithm is based on an optimal torque controller, employed to extract more power. In this study, a WECS with a PMSG connected to the local linear resistive load and grid is considered for simulation. A multilevel inverter grid interface is controlled by in phase disposition pulse width modulation (IPD – PWM). The multilevel inverter with MPPT has been acknowledged as superior to a normal two-level inverter without MPPT Controller. Simulation results as observed for fixed and variable wind speed including MPPT demonstrate benefits of the proposed method.

scholarly journals A New Modular Multilevel Inverter Based on Step-Up Switched-Capacitor Modules

Energies ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 524 ◽  
Author(s):  
Aryorad Khodaparast ◽  
Erfan Azimi ◽  
Ali Azimi ◽  
M. Ebrahim Adabi ◽  
Jafar Adabi ◽  
...  
Keyword(s):  
Theoretical Investigation ◽  
High Efficiency ◽  
Harmonic Distortion ◽  
Low Frequency ◽  
Multilevel Inverter ◽  
Voltage Source ◽  
Switched Capacitor ◽  
Level Control ◽  
Dc Voltage ◽  
Bipolar Voltage

A new structure of switched capacitor multilevel inverter (SCMLI) capable of voltage boosting and with self-balancing ability is introduced in this article. This advantage is the result of a step by step rise of capacitor voltages in each module, supplied by just one DC voltage source. The proposed topology generates a sinusoidal output waveform with a magnitude several times greater than the input one. Higher output staircase AC voltage is obtained by applying a nearest level control (NLC) modulation technique. The most significant features of this configuration can be mentioned as: fewer semiconductor devices, remarkably low total harmonic distortion (THD), desirable operating under high /low frequency, high efficiency, inherent bipolar voltage production, easy circuit expansion, ease of control and size reduction of the circuit thanks to utilizing neither bulky transformer nor inductor. Moreover, the proposed SCMLI is comprehensively surveyed through theoretical investigation and a comparison of its effectiveness to recent topologies. Eventually, the operating principle of a 25-level prototype of the suggested SCMLI is validated by simulation in the MATLAB SIMULINK environment and experimental results.

scholarly journals A Review on Wind Turbine and Wind Generator Used in WECS

2019 ◽  
pp. 01-04
Author(s):  
Nitish Kumar Singh ◽  
Dashrath Kumar
Keyword(s):  
Energy Source ◽  
Wind Energy ◽  
Wind Turbine ◽  
Power Quality ◽  
Power Plants ◽  
Harmonic Distortion ◽  
Energy Resource ◽  
Electrical Energy ◽  
Wind Power Plants ◽  
Core Energy

The applications of wind energy develop much rapidly than the other renewable resources such as solar, geothermal and so on in the 21st century. It becomes the third core energy resource following non-conventional fuels as oil and chemical. Electrical energy generated by wind power plants is the best ever developing and most promising renewable energy source. The wind is a clean, free and limitless energy source. Wind Energy Generation Systems (WECS) are confront with increasing demands for power quality and harmonic distortion control. With the advance in power electronics technology, the fast growth of variable speed WECS is now witness. However, the power quality still remains an important issue to be addressed thoroughly by researchers. This paper presents a comparative study on grid connected WECS having two different Wind Turbine Generator Systems (WTGS) using DFIG and PMSG.

scholarly journals Prediction of the monthly cost of energy usage by PEMFC at housing in North Sumatra Province, Indonesia

2021 ◽  
Vol 927 (1) ◽  
pp. 012035
Author(s):  
Taufiq Bin Nur ◽  
Mar’i Muhammad Harahap
Keyword(s):  
Fuel Cell ◽  
High Efficiency ◽  
Electricity Consumption ◽  
Electrical Energy ◽  
Developed Countries ◽  
Hydrogen Fuel ◽  
Fuel Cost ◽  
High Hydrogen ◽  
Monthly Cost ◽  
Model And Simulation

Abstract The development of renewable energy is increasing nowadays. Besides, the development of energy conversion systems that can work at high efficiency also increases along with the decreasing availability of fossil energy. The fuel cell is an electrochemical device that converts chemical reaction energy directly into direct current electrical energy. The use of fuel cells as power generating in housing has also increased rapidly, especially in developed countries. This study aims to develop a model and simulation for the Polymer Exchange Membrane Fuel Cell (PEMFC) system with a working temperature of 165 °C) using Aspen Plus simulation. In this analysis, the model and simulation developed are used to predict the amount of fuel needed when used in housing as an electricity generator and obtain a monetary value for the monthly fuel procurement. The PEMFC system is designed to generate power up to 0.60 kW by consuming hydrogen fuel with a current density of 0.02 A/cm2. The hydrogen consumed by the PEMFC system is around 0.030 kg/hour, with a monthly cost of hydrogen consumption by the system is Rp. 2,052,000. Meanwhile, the monthly electricity from the national grid (PLN) bill costs around Rp. 569,261 (in the year 2019). In comparing the energy bill, at the moment, the fuel cost for PEMFC as a power generation system is much more expensive than PLN’s electricity consumption costs due to the high hydrogen fuel cost.

scholarly journals Sistema de recuperación de energía basado en emular el movimiento del flujo de agua en tuberías

2020 ◽  
pp. 1-8
Author(s):  
Jorge Edmundo Mastache-Mastache ◽  
César León Ramírez-Chávez ◽  
Jesús Adan Lovera-Garcia ◽  
José Ángel De La Garza-Macedo
Keyword(s):  
Energy Production ◽  
High Efficiency ◽  
Storage System ◽  
Electrical Energy ◽  
Clean Energy ◽  
Power Converter ◽  
Recovery System ◽  
Adaptive Power ◽  
Power Generation Systems ◽  
Mechanical Movement

Energy production is an important factor for the development of productive activities, transformation and services in the country, whose generation and consumption increases year by year, which leads to the use of clean energy more and more. Hydropower as a portable application option contributes little to energy production in industries or homes, so this situation presents an opportunity for the development of adaptive power generation systems that take advantage of the movement of water. In the present work, a test bench based on an energy recovery system was developed, which consists of simulating the flow of water that exists in the pipes in order to generate electrical energy through mechanical movement by coupling a permanent magnet generator, where the behavior of a turbine interconnected to a pipeline was emulated, through a DC motor whose speed is controlled through a power chopper. A storage and power conversion was developed, integrating a rectifier module with filter which converted the signal from alternating to direct, which would later be the input of a Buck reducing CD-CD converter, which has high efficiency and allows to reduce the voltage stabilized at 5V. To complete the storage system at different loads, a Boost power converter module was used which raises and converts the signal from CD to CD, obtaining a voltage output greater than its input, this energy can be stored in batteries and in the same way be used to power any CD device, thus allowing us to save a part of the energy that is consumed when transporting water in a pipe.

scholarly journals Designing an uninterruptible power supply based on the high efficiency push–pull converter

2013 ◽  
Vol 16 (3) ◽  
pp. 29-40
Author(s):  
Phuong Minh Le ◽  
Dzung Quoc Phan ◽  
Huy Minh Nguyen ◽  
Phong Hoai Nguyen
Keyword(s):  
Power Supply ◽  
High Efficiency ◽  
Harmonic Distortion ◽  
Original System ◽  
Uninterruptible Power Supply ◽  
Switching Power ◽  
Wide Range ◽  
Uninterruptible Power ◽  
Modulation Control ◽  
High Level

This paper presents an implementation of the DC/DC push–pull converter for an uninterruptible power supply (UPS). Some classical DC/DC converters are presented and analyzed for pointing out their advantages and drawbacks. Besides, an original system based on a push-pull converter associated with a dynamic modulation control is chosen. The main advantage is the possibility to control the delivered electric power in a wide range from very low level to high level of voltage within the same basic architecture. It can reduce the switching power losses and increase the power conversion efficiency. This paper proposed a new control scheme of the DC/DC converter and DC/AC inverter. The suggested system consists of a high efficiency DC/DC converter and a singlephase DC/AC inverter has been simulated using Matlab/Simulink and designed basing on the DSP TMS320F28027. Both results show high performances of the DC link and AC load voltages, when load changes from zero to rated. The performance of the proposed system has been verified through a 1kW prototype of the system for a 50 Hz/220-230 VAC load sourcing by two series connected batteries of 12V. The proposed DC/DC converter achieves a high efficiency of 93.0%. The system including the DC/DC converter and DC/AC inverter achieves an efficiency of 91.2% and Total Harmonic Distortion (THD) of AC load voltage reached 1.9%.

PV based DG Power Quality Improvement Using Integrated D-STATCOM under varying Insolation

2021 ◽  
Vol 9 (11) ◽  
pp. 1848-1855
Author(s):  
Lakshmi Sravya Kanukolanu
Keyword(s):  
Power Quality ◽  
Power Plants ◽  
Reactive Power ◽  
Harmonic Distortion ◽  
Voltage Control ◽  
Electrical Energy ◽  
Total Harmonic Distortion ◽  
Static Synchronous Compensator ◽  
Pv Systems ◽  
Simulation Results

Abstract: The standalone grid connected Photovoltaic (PV) systems have been gradually increasing for generation of electrical energy due to ever increasing fuel and coal prices, as well as the environmental issues posed by conventional power plants. In this transition phase, power quality is at its expense, resulting in damage to equipment or appliances and lost in production. Inadequate power quality can be caused by network failures and switching operations, which primarily cause voltage dips, interruptions, transients, and network disturbances from loads which primarily produce flicker i.e., rapid voltage changes, harmonics and phase imbalance. In this paper PV is used as an external DC source for D-STATCOM (Distributed Static Synchronous Compensator) which is a FACTS device that can maintain and repair power quality limitations such as power factor correction, voltage control, load balancing and harmonic reduction. The PV-STATCOM system inverter is implemented by impending MPPT method using P&O algorithm so as to provide DC link voltage control and to improve transient response along with counteracting power quality issues. MATLAB/Simulink based simulation results are presented for the proposed PVSTATCOM model. The simulation results proves that the PV-STATCOM system has better Total Harmonic Distortion (THD) and good reactive power compensation at different irradiance levels. Keywords: Photovoltaic (PV) systems, D-STATCOM (Distributed Static Synchronous Compensator), Total Harmonic Distortion (THD), MPPT (Maximum Power Point Tracking), FACTS (Flexible AC Transmission System)

HASIL AUDIT ENERGI DI INDUSTRI TEKSTIL

2010 ◽  
Vol 6 (1) ◽  
Author(s):  
Achmad Hasan
Keyword(s):  
Power Plant ◽  
Power Quality ◽  
Power Factor ◽  
Electric Energy ◽  
Harmonic Distortion ◽  
Electrical Energy ◽  
Total Harmonic Distortion ◽  
Energy Audit ◽  
Hydro Power ◽  
Installed Capacity

Energy audit is one way to plan for optimizing the supply and use of energyneeded by the industry. Portrait of the use of electrical energy used in textileindustry supplied from PT.PLN (Persero) with the power contract for 23000 kVAand POJ Power (Mini Hydro Power Plant, Jatiluhur) with installed capacity of5800 kVA. Especially for electric energy supplied from POJ Power, status ofelectricity continues to be a contract with the manager of POJ Power Jatiluhur.Based on the results of measurement of power quality with PQA Hioki 3197 is asdescribed in the previous section, it can be seen that: (a) Voltage magnitude atsome of the panel is high (about 250 V), (b) The power factor is very low, (c)Generally, voltage and current THD (Total Harmonic Distortion) is very high.Kata kunci: energi, listrik, penghematan, filter harmonik, faktor daya

scholarly journals Design And Implementation of Two-Phase Interleaved Voltage Source Inverter For PV Applications

2019 ◽  
Vol 20 (2) ◽  
pp. 127-141
Author(s):  
HARIKA SRIDHARAN ◽  
Seyezhai Ramalingam
Keyword(s):  
Power Quality ◽  
Harmonic Distortion ◽  
Total Harmonic Distortion ◽  
Voltage Source ◽  
Voltage Source Inverter ◽  
Two Phase ◽  
Distortion Factor ◽  
Matlab Simulink ◽  
Pv Panel ◽  
Current Ripple

ABSTRACT:The design of a voltage source inverter is challenging for PV-grid connected systems due to power quality issues. To improve the power quality,a two-phase interleaved voltage source inverter (IVSI) is proposed in this paper. IVSI phase shifts two voltage source inerters connected in parallel. The inverter topology is interfaced with a 40W PV panel employing a multiple maxima search (MMS) MPPT algorithm. This algorithm results in higher tracking efficiency compared to existing methods. Modelling of the PV with MPPT and the circuit configuration of the interleaved inverter is simulated in MATLAB/SIMULINK. The switches in the IVSI is controlled by employing a unipolar PWM technique. The performance of the IVSI is investigated in terms of weighted total harmonic distortion (WTHD), distortion factor (DF), harmonic spread factor (HSF), and inductor current ripple and compared with classical VSI. From the analysis, it is inferred that the proposed inverter results in reduced total harmonic distortion(THD) and decreased inductor current ripple thereby producing a high-quality output. The hardware model of the two-phase IVSI is developed and interfaced with PV where gating pulses are generated in FPGA. The simulation results are validated experimentally. ABSTRAK: Rekaan pembalik sumber voltan adalah mencabar pada sistem gabungan grid-PV disebabkan isu kualiti tenaga. Bagi memperbaharui kualiti tenaga, pembalik sumber voltan antara lembar dua-fasa (IVSI) telah dicadangkan dalam kajian ini. Anjakan fasa IVSI pembalik sumber voltan dua-fasa telah dihubungkan secara selari. Topologi pembalik telah diantaramukakan dengan 40W panel PV dengan mengunakan carian maksima berganda (MMS) algoritma MPPT. Hasil algoritma menunjukkan lebih tinggi keberkesanan dibandingkan dengan kaedah sedia ada. PV model dengan MPPT dan konfigurasi litar pembalik antaramuka telah disimulasi menggunakan MATLAB/SIMULINK. Suis dalam IVSI dikawal dengan menggunakan teknik PWM unipolar. Dapatan kajian ke atas IVSI adalah berdasarkan berat pengherotan total harmoni (WTHD), faktor pengherotan (DF), faktor sebaran harmoni (HSF), getaran arus pembalik dan dibandingkan dengan kaedah klasik VSI. Analisis menunjukkan kesimpulan dapatan kajian ke atas pembalik yang dicadangkan telah berkurang jumlah pengherotan harmoni (THD) dan getaran arus pembalik telah berkurang, oleh itu menghasilkan hasil akhir yang berkualiti tinggi. Model perkakasan IVSI dua-fasa telah dibangunkan dan diantaramukakan dengan PV di mana signal pengegetan dihasilkan dalam FPGA. Dapatan hasil simulasi telah disahkan secara eksperimen.

scholarly journals Integrated Grid-connected Hybrid Power Generating System with Optimized PLL-based Power Control

2021 ◽  
Vol 18 (16) ◽  
Author(s):  
Pawan PANDEY ◽  
Kanwarjit SANDHU
Keyword(s):  
Power Quality ◽  
Hybrid System ◽  
Storage System ◽  
Energy Storage System ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Power Fluctuation ◽  
Hybrid Power ◽  
Simple Strategy ◽  
Generating System

In this paper, grid-connected photovoltaic-wind energy, including a battery energy storage system (BESS) with a novel topology base proposed controller, is presented. The battery can be reflected in a smooth and stable output under variation of weather and load conditions for the grid-connected system. Robust phase-locked loop- (PLL) based hybrid Voltage Source Converter (VSC) controller is designed to enhance power quality (PQ) with mitigating power fluctuation at DC-link by applied BESS on the DC side. The results can be summarized in 2 stages; in the 1st stage, the performance of the designed hybrid system can be analyzed with untuned parameters of the converter, and in the 2nd stage, a simple strategy base proposed controller to improve the operation stability and analyze the PQ of the hybrid power generating (HPG) system is developed. Finally, the proposed hybrid system is modeled in MATLAB/Simulink and the simulation results as obtained are compared with an existing controller. HIGHLIGHTS Performance analysis of design a grid connected hybrid power generating system The system achieved stability and reliability with proposed controllers The presence of a battery, providing smooth movement of the generated power of the system A coordinated controller designed to improve power fluctuation and power quality Highly robust grid-connected HPG system designed using hybrid VSC and bidirectional controller GRAPHICAL ABSTRACT

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