Modified Cascaded H-bridge Multilevel Inverter for Hybrid Renewable Energy Applications

ABSTRACT:

Renewable energy sources and technologies have the potential to provide solutions to the longstanding energy problems being faced by developing countries. The renewable energy sources like wind energy, solar energy, geothermal energy, ocean energy, biomass energy and fuel cell technology can be used to overcome energy shortage in India. This paper proposes a modified multi-level inverter (MLI) topology for Hybrid Renewable Energy Sources (HRES) and a design of hybrid solar-wind power generation model with 9-level, 13-level and 17-level inverter topologies. A HRES connected to a modified Cascaded H-Bridge Multi Level Inverter (CHB-MLI) is developed, whose switches are controlled using Artificial Neural Network (ANN) model. The proposed hybrid energy system model consists of 10 Metal Oxide Semiconductor Field Effect Transistors (MOSFETs) that intend to give 17 levels of output voltage. The proposed topology performs effectively with reduced number of components and reduced Total Harmonic Distortion (THD). The performance of the proposed system is analyzed by designing the model in MATLAB/SIMULINK environment. The simulation results of the proposed inverter for the HRES application are compared with the results of the existing topologies to show the effectiveness of the proposed model.

 KEYWORDS:

  1. Battery energy storage system (BESS)
  2. Modified cascaded H-bridge Multi-level inverter (MCHBMLI)
  3. Total harmonic distortion (THD)

 SOFTWARE: MATLAB/SIMULINK

CONCLUSION:

In this paper, 9-level, 13-level and 17-level inverters are designed by employing modified cascaded MLI, followed by ANN as a control approach for the inverter. Using the ANN method, the MPP exactly searching when the solar irradiance changes sharply, and it can make the system work under a stable mode. The advantage of the ANN-based PV model method is the fast MPP approximation according to the parameters of the PV panel. The proposed new MPPT algorithm can search the MPP fast and exactly based on the feedback voltage and current with different solar irradiance and temperature of the environment. The simulations are performed in MATLAB/SIMULINK environment. The output voltage waveform shows less distortion with a reduced number of power switches and is validated by calculating THD as a performance measure. The results attained from the proposed model exhibits superiority over the previously suggested models when compared. The proposed modified system can be analyzed in the future, with different sources such as fuel cell, diesel generator, etc. in the standalone microgrid topology. This is more cost-effective due to the use of reduced number of switches and other components. Thus it helps in improving the total harmonic distortions as per the IEEE 519 standards, in terms of power quality of the islanded microgrid. The limitation of the proposed topology is that, in case of a failure of one ofH-bridges, theMLI can still be operated with decreased number of levels. However, full power cannot be supplied to the load. This can be improved by designing a fault tolerant MLI topology in the future.

REFERENCES:

  1. M. A. Rosen, and I. Dincer, “Exergy as the confluence of energy, environment and sustainable development,” Exergy Int. J., Vol. 1, pp. 3–13, 2001.
  2. P. Thongprasri. “Capacitor voltage balancing in the dc-link five-level full-bridge diode-clamped multilevel inverter,” 2016.
  3. C. L. Kuppuswamy, and T. A. Raghavendiran. “FPGA Implementation of Carrier Disposition PWM for Closed Loop Seven Level Diode Clamped Multilevel Inverter in Speed Control of Induction Motor,” 2018.
  4. F. Khoucha, S. M. Lagoun, K. Marouani, A. Kheloui, and M. El Hachemi Benbouzid, “Hybrid cascaded H-bridge multilevel-inverter induction-motor-drive direct torque control for automotive applications,” IEEE Trans. Ind. Electron., Vol. 57, no. 3, pp. 892–899, 2010.
  5. V. Jammala, S. Yellasiri, and A. K. Panda, “Development of a new hybrid multilevel inverter using modified carrier SPWM switching strategy,” IEEE Trans. Power Electron., Vol. 33, no. 10, pp. 8192–8197, 2018.

A Modified Cascaded H-Bridge Multilevel Inverter For Solar Applications

ABSTRACT:

In this paper, a modified cascaded H-bridge multilevel inverter (MLI) is proposed and designed for solar applications. Generally, as the level of conventional multilevel inverter increases, the required number of switches and size increases. The proposed topology is cascade of unit stages which involves 5 switches and two voltage source; moreover a unit stage is capable of generating 5 levels. Also, the detailed analysis of cascaded multilevel inverter is discussed which incorporates three different methodologies involving less number of power devices in order to generate maximum number of levels. This results into reduction in gate drive circuitry and less switching losses. The proposed MLI is designed for power 1.5kW and Inphase level shifting SPWM technique has been incorporated in which 5kHz carrier wave is compared with 50Hz of sinusoidal wave with a modulation index of 0.8. As a result, total harmonic distortion (THD) is achieved as 4.71% with LC-filter for above mentioned multilevel inverter. The circuits are modeled and simulated with the help of MATLAB/SIMULINK.

KEYWORDS:

  1. Modified cascaded H-bridge MLI
  2. Solar
  3. SPWM techniques
  4. Total Harmonic Distortions

SOFTWARE: MATLAB/SIMULINK

 CONCLUSION:

In this paper, a new topology of modified cascaded H bridge MLI is designed for solar high power application. The three different methodologies have been analyzed and 9-level, 13-level and 17-level output is observed in the respective methodology. The number of switches used in the topology is less which in turn reduced the corresponding gate driving circuitry and made the circuit compact in size. The circuits of proposed MLI are simulated in MATLAB/SIMULINK and total harmonic distortions for the three methodologies are obtained by using FFT analysis window. The lowest THD observed with LC-filter is 4.71%. The proposed MLI is designed for power 1.5kW and In-Phase level shifting method is followed for the pulse generation for all three methodologies.

REFERENCES:

[1] Wei Zhao; Hyuntae Choi; G. Konstantinou; M. Ciobotaru; and V. G. Agelidis “Cascaded H-bridge Multilevel Converter for Large-scale PV Grid-Integration with Isolated DC-DC stage” PEDG, IEEE 2012.

[2] S. Rivera; S. Kouro; B. Wu; J. I. Leon; J. Rodriguez; and L. G. Franquelo “Cascaded H-bridge multilevel converter multistring topology for large scale photovoltaic systems,” IEEE ISIE 2011, pp.1837-1844.

[3] N.A. Rahim; K. Chaniago; and J. Selvaraj “Single-Phase Seven-Level Grid Connected Inverter for Photovoltaic System”, IEEE Transactions on Industrial Electronics, Vol. 58, No. 6, June 2011, pp. 2435-2443

[4] B. Singh; N. Mittal; and K. S. Verma “Multi-Level Inverter: A Literature Survey On Topologies And Control Strategies”, International Journal of Reviews in Computing, Vol. 10, July 2012, pp. 1-16

[5] Zhiguo pan; F .Z Peng; Victor Stefanoic; and Mickey Leuthen “A Diode-Clamped Multilevel Converter with Reduced Number of Clamping Diodes.”2004 IEEE.

Modeling, Simulation and Implementation of a Five-Phase Induction Motor Drive System

ABSTRACT:

This paper presents a comprehensive simulation model of a five-phase induction motor drive system. Both open loop and closed-loop control is elaborated. The complete component modeling is developed using ‘simpower system’ blocksets of Matlab/Simulink. To address the real time implementation issues, dead banding of the inverter switches are also incorporated in the simulation model. To validate the modeling procedure, experimental implementation is done in TMS320F2812 DSP platform with a custom built five-phase drive system. Excitation, acceleration and loading transients are investigated. The developed simulation model is fully verified by the real time implementation

KEYWORDS:

  1. Five-phase drive
  2. V/f control
  3. Induction motor

 SOFTWARE: MATLAB/SIMULINK

CONCLUSION:

This paper presents a complete simulation model to simulate a five-phase induction motor drive system for constant v/f speed control method. The simulation model is developed using simpower system block sets of the Matlab/Simulink software. Step by step model development is elaborated. Dead banding in the simulation procedure is presented. A detailed simulation results are presented to validate the modeling procedure. Experimental set up is discussed and the experimental results are provided to exactly match the results obtained using simulation. This proves the successful implementation of the control scheme.

 REFERENCES:

[1] D. Novotony, and T.A. Lipo, Vector control and dynamics of ac drives, Clarendon Press, Oxford, UK, 2000.

[2] A.M. Trzynadlowski, The field oriented Principle in Control of Induction motors, Kuluwer Press, 1994.

[3] I. Boldea and S.A. Nasar, Vector Control of AC Drives, CRC Press, London, 1992.

[4] D.C. White and H.H. Woodson, Electromechanical energy conversion, John Wiley and Sons, New York, 1959.

[5] S.A. Nasar and I. Boldea, The Induction Machine Handbook, CRC Press, London, 2002.

A Novel Multilevel Multi-Output BidirectionalActive Buck PFC Rectifier

ABSTRACT:

 This paper presents a new family of buck type PFC (power factor corrector) rectifiers that operates in CCM (continuous conduction mode) and generates multilevel voltage waveform at the input. Due to CCM operation, commonly used AC side capacitive filter and DC side inductive filter are removed from the proposed modified packed U-cell rectifier structure. Dual DC output terminals are provided to have a 5-level voltage waveform at the input points of the rectifier where it is supplied by a grid via a line inductor. Producing different voltage levels reduces the voltage harmonics which affects the grid current harmonic contents directly. Low switching frequency of the proposed rectifier is a distinguished characteristic among other buck type rectifiers that reduces switching losses and any high switching frequency related issues, significantly. The proposed transformer-less, reduced filter and multilevel rectifier topology has been investigated experimentally to validate the good dynamic performance in generating and regulating dual 125V DC outputs terminals as telecommunication boards feeders or industrial battery chargers under various situation including change in the loads and change in the in main grid voltage amplitude.

KEYWORDS:

  1. Packed U-Cell
  2. PUC5
  3. HPUC
  4. Buck PFC rectifie
  5. Multilevel converter
  6. Power quality

 

SOFTWARE: MATLAB/SIMULINK

CONCLUSION:

In this paper a 5-level rectifier operating in buck mode has been proposed which is called HPUC as a slight modification to PUC multilevel converter. It has been demonstrated that the proposed rectifier can deceive the grid by generating maximum voltage level of 250V at AC side as boost mode while splitting this voltage value at its two output terminals to provide buck mode of operation with 125V DC useable for battery chargers or telecommunication boards’ feeder. Although it has more active switches than other buck rectifier topologies and some limitations on power balance between loads, overall system works in boost mode and CCM which results in removing bulky AC and DC filters that usually used in conventional buck PFC rectifiers. Moreover, generating multilevel waveform leads to reduced harmonic component of the voltage waveform and consequently the line current. It also aims at operating with low switching frequency and small line inductor that all in all characterizes low power losses and high efficiency of the HPUC rectifier. Comprehensive theoretical studies and simulations have been performed on power balancing issue of the HPUC rectifier. Full experimental results in steady state and during load and supply variation have been illustrated to prove the fact that HPUC topology can be a good candidate in a new family of buck bridgeless PFC rectifiers with acceptable performance. Future works can be devoted to developing robust and nonlinear controllers on the proposed rectifier topology.

REFERENCES:

[1] M. Mobarrez, M. G. Kashani, G. Chavan, and S. Bhattacharya, “A Novel Control Approach for Protection of Multi-Terminal VSC based HVDC Transmission System against DC Faults,” in ECCE 2015- Energy Conversion Congress & Exposition, Canada, 2015, pp. 4208- 4213.

[2] IEEE, “IEEE Recommended Practice and Requirements for Harmonic Control in Electric Power Systems,” in IEEE Std 519-2014 (Revision of IEEE Std 519-1992), ed, 2014, pp. 1-29.

[3] IEC, “Limits for Harmonic Current Emissions (Equipment Input Current_ 16A Per Phase),”in IEC 61000-3-2 (Ed. 3.2, 2009), ed, 1995.

[4] B. Singh, B. N. Singh, A. Chandra, K. Al-Haddad, A. Pandey, and D. P. Kothari, “A review of single-phase improved power quality ACDC converters,” IEEE Trans. Ind. Electron., vol. 50, no. 5, pp. 962- 981, 2003.

[5] H. Choi, “Interleaved boundary conduction mode (BCM) buck power factor correction (PFC) converter,” IEEE Trans. Power Electron., vol. 28, no. 6, pp. 2629-2634, 2013.

Hybrid converter topology for reducing torque ripple of BLDC motor

ABSTRACT:

 This study investigates the torque ripple performance of brushless DC (BLDC) motor drive system by integrating both modified single-ended primary inductor converter (SEPIC) and silicon carbide metal–oxide–semiconductor field-effect transistor based three-level neutral-point-clamped (NPC) inverter. In BLDC motor, the high commutation torque ripple is an important origin of vibration, speed ripple and prevents the use of the BLDC motor drive system in high-performance and high-precision applications. For torque ripple reduction, the modified SEPIC converter is employed at the entrance of the three-level NPC inverter, which regulates the DC-link voltage according to the motor speed. Moreover, the three-level NPC inverter is employed as a second-stage converter to suppress current ripple for further torque ripple reduction. Finally, the performance of the proposed hybrid converter topology is verified by simulation and laboratory experimental results.

KEYWORDS:

  1. DSP controller
  2. Energy eficiency
  3. Fuzzy logic (FL)
  4. MPPT
  5. Photovoltaic systems

 SOFTWARE: MATLAB/SIMULINK

 CONCLUSION:

A novel hybrid circuit topology has been proposed in this paper which is built by a modified SEPIC converter and a SiC-MOSFETbased three-level NPC converter for minimising torque ripple in a BLDC motor drive system. For efficient reduction of torque ripple, the first stage is the modified SEPIC converter that lifts the DClink voltage to the desired value based on the motor speed measurement. For further torque ripple reduction, the three-level NPC inverter is employed as the second-stage converter to suppress current ripple. Experimental results show that the proposed hybrid converter topology can suppress the torque ripple to 14.6% at the speed of 6000 rpm, commutation torque ripple is reduced substantially and produce smooth torque waveform than the BLDC motor driven by the two-level, three-level NPC, twolevel inverter with DC-link voltage control, and two-level inverter with SEPIC converter and switch selection circuit topologies.

REFERENCES:

[1] Singh, B., Bist, V.: ‘An improved power quality bridgeless Cuk converter fed BLDC motor drive for air conditioning system’, IET Power Electron., 2013, 6, (5), pp. 902–913

[2] Carlson, R., Lajoie-Mazenc, M., Fagundes, J.C.D.S.: ‘Analysis of torque ripple due to phase commutation in brushless dc machines’, IEEE Trans. Ind. Appl., 1992, 28, (3), pp. 632–638

[3] Lee, S.K., Kang, G.H., Hur, J., et al.: ‘Stator and rotor shape designs of interior permanent magnet type brushless DC motor for reducing torque fluctuation’, IEEE Trans. Magn., 2012, 48, pp. 4662–4665

[4] Seo, U.J., Chun, Y.D., Choi, J.H., et al.: ‘A technique of torque ripple reduction in interior permanent magnet synchronous motor’, IEEE Trans. Magn., 2011, 47, (10), pp. 3240–3243

[5] Murai, Y., Kawase, K., Ohashi, K., et al.: ‘Torque ripple improvement for brushless DC miniature motors’, IEEE Trans. Ind. Appl., 1989, 25, (3), pp. 441–450

Design and Performance Analysis of Three-Phase Solar PV Integrated UPQC

ABSTRACT:

This paper deals with the design and performance analysis of a three-phase single stage solar photovoltaic integrated unified power quality conditioner (PV-UPQC). The PV-UPQC consists of a shunt and series connected voltage compensators connected back to back with common DC-link.The shunt compensator performs the dual function of extracting power from PV array apart from compensating for load current harmonics. An improved synchronous reference frame control based on moving average filter is used for extraction of load active current component for improved performance of the PVUPQC. The series compensator compensates for the grid side power quality problems such as grid voltage sags/swells. The compensator injects voltage in-phase/out of phase with point of common coupling (PCC) voltage during sag and swell conditions respectively. The proposed system combines both the benefits of clean energy generation along with improving power quality. The steady state and dynamic performance of the system are evaluated by simulating in Matlab-Simulink under a nonlinear load. The system performance is then verified using a scaled down laboratory prototype under a number of disturbances such as load unbalancing, PCC voltage sags/swells and irradiation variation.

KEYWORDS:

  1. Power Quality
  2. Shunt compensator
  3. Series compensator
  4. UPQC
  5. Solar PV
  6. MPPT

SOFTWARE: MATLAB/SIMULINK

CONCLUSION:

The design and dynamic performance of three-phase PVUPQC have been analyzed under conditions of variable irradiation and grid voltage sags/swells. The performance of the system has been validated through experimentation on scaled down laboratory prototype. It is observed that PVUPQC mitigates the harmonics caused by nonlinear load and maintains the THD of grid current under limits of IEEE-519 standard. The system is found to be stable under variation of irradiation, voltage sags/swell and load unbalance. The performance of d-q control particularly in load unbalanced condition has been improved through the use of moving average filter. It can be seen that PV-UPQC is a good solution for modern distribution system by integrating distributed generation with power quality improvement.

REFERENCES:

[1] B. Mountain and P. Szuster, “Solar, solar everywhere: Opportunities and challenges for australia’s rooftop pv systems,” IEEE Power and Energy Magazine, vol. 13, no. 4, pp. 53–60, July 2015.

[2] A. R. Malekpour, A. Pahwa, A. Malekpour, and B. Natarajan, “Hierarchical architecture for integration of rooftop pv in smart distribution systems,” IEEE Transactions on Smart Grid, vol. PP, no. 99, pp. 1–1, 2017.

[3] Y. Yang, P. Enjeti, F. Blaabjerg, and H. Wang, “Wide-scale adoption of photovoltaic energy: Grid code modifications are explored in the distribution grid,” IEEE Ind. Appl. Mag., vol. 21, no. 5, pp. 21–31, Sept 2015.

[4] M. J. E. Alam, K. M. Muttaqi, and D. Sutanto, “An approach for online assessment of rooftop solar pv impacts on low-voltage distribution networks,” IEEE Transactions on Sustainable Energy, vol. 5, no. 2, pp.663–672, April 2014.

A Switched-Capacitor Inverter Using Series/Parallel Conversion with Inductive Load

ABSTRACT

A novel switched-capacitor inverter is proposed. The proposed inverter outputs larger voltage than the input voltage by switching the capacitors in series and in parallel. The maximum output voltage is determined by the number of the capacitors. The proposed inverter, which does not need any inductors, can be smaller than a conventional two-stage unit which consists of a boost converter and an inverter bridge. Its output harmonics are reduced compared to a conventional voltage source single phase full bridge inverter. In this paper, the circuit configuration, the theoretical operation, the simulation results with MATLAB/ SIMULINK, and the experimental results are shown. The experimental results accorded with the theoretical calculation and the simulation results.

KEYWORDS

  1. Charge pump
  2. Multicarrier PWM
  3. Multilevel Inverter
  4. Switched capacitor (SC)

CONCLUSION

In this paper, a novel boost switched-capacitor inverter was proposed. The circuit topology was introduced. The modulation method, the determination method of the capacitance, and the loss calculation of the proposed inverter were shown. The circuit operation of the proposed inverter was confirmed by the simulation results and the experimental results with a resistive load and an inductive load. The proposed inverter outputs a larger voltage than the input voltage by switching the capacitors in series and in parallel. The inverter can operate with an inductive load. The structure of the inverter is simpler than the conventional switched-capacitor inverters. THD of the output waveform of the inverter is reduced compared to the conventional single phase full bridge inverter as the conventional multilevel inverter.

REFERENCES

[1] H. Liu, L. M. Tolbert, S. Khomfoi, B. Ozpineci, and Z. Du, “Hybrid cascaded multilevel inverter with PWM control method,” in Proc. IEEE Power Electron. Spec. Conf., Jun. 2008, pp. 162–166.

[2] A. Emadi, S. S. Williamson, and A. Khaligh, “Power electronics intensive solutions for advanced electric, hybrid electric, and fuel cell vehicular power systems,” IEEE Trans. Power Electron., vol. 21, no. 3, pp. 567–577, May 2006.

[3] L. G. Franquelo, J. Rodriguez, J. I. Leon, S. Kouro, R. Portillo, and M. A. M. Prats, “The age of multilevel converters arrives,” IEEE Ind. Electron. Mag., vol. 2, no. 2, pp. 28–39, Jun. 2008.

[4] Y. Hinago and H. Koizumi, “A single phase multilevel inverter using switched series/parallel DC voltage sources,” IEEE Trans. Ind. Electron., vol. 57, no. 8, pp. 2643–2650, Aug. 2010.

[5] S. Chandrasekaran and L. U. Gokdere, “Integrated magnetics for interleaved DC–DC boost converter for fuel cell powered vehicles,” in Proc. IEEE Power Electron. Spec. Conf., Jun. 2004, pp. 356–361.

Solar PV Array Fed Direct Torque Controlled Induction Motor Drive for Water Pumping

ABSTRACT:

 This paper deals with the solar photovoltaic (PV) array fed direct torque controlled (DTC) induction motor drive for water pumping system. To extract maximum power from the solar PV array, a DC-DC boost converter is employed. The soft starting of a three-phase induction motor is achieved by controlling the DC-DC boost converter through the incremental conductance maximum power point tracking (MPPT) technique. The induction motor is well matched to drive a type water pump due to its load characteristics. It is well suited to the MPPT of the solar PV array. By using DTC technique, an induction motor exhibits homogeneous or even better response than the DC motor drive. The proposed system is designed and its performance is simulated in MATLAB/Simulink platform. Simulated results are demonstrated to validate the design and control of the proposed system.

KEYWORDS:

  1. Solar Photovoltaic (PV)
  2. Direct Torque Control (DTC)
  3. MPPT Control
  4. Induction Motor
  5. Water Pump

 SOFTWARE: MATLAB/SIMULINK

 CONCLUSION:

It has been demonstrated that the solar PV array fed DTC controlled induction motor drive has been found quite suitable for water pumping. A new method for reference speed generation for DTC scheme has been proposed by controlling the voltage at DC bus and pump affinity law has been used to control the speed of an induction motor. Solar PV array has been operated at maximum power during varying atmospheric conditions. This is achieved by using incremental conductance based MPPT algorithm. The speed PI controller has controlled the motor stator current and controlled the flow rate of pump. Simulation results have demonstrated that the performance of the controller has been found satisfactory under steady state as well as dynamic conditions.

REFERENCES:

[I] R. Foster, M. Ghassemi and M. Cota, Solar energy: Renewable energy and the environment, CRC Press, Taylor and francis Group, Inc. 20 I O.

[2] S. Jain, Thopukara, AK. Karampur and V.T. Somasekhar, “A SingleStage Photovoltaic System for a Dual-Inverter-Fed Open-End Winding Induction Motor Drive for Pumping Applications,” iEEE Trans. On Power Electro.. vo1.30, no.9, pp.4809-4818, Sept. 2015.

[3] M. A Razzak, A S. K. Chowdhury and K. M. A Salam, “Induction motor drive system using Push-Pull converter and three-phase SPWM inverter fed from solar photovoltaic panel,” international Conference on 2014 Power and Energy Systems: Towards Sustainable Energy, 13- 15 March 2014.

[4] J.V. Caracas Mapurunga, G. Farias Carvalho De, L. F. Moreira Teixeira, L.A Ribeiro De Souza, “Implementation of a HighEfficiency, High-Lifetime, and Low-Cost Converter for an Autonomous Photovoltaic Water Pumping System,” iEEE Trans. On ind. Appl., vo1.50, no.!, pp.631-641, Jan.-Feb. 2014.

 

Solar Powered Based Water Pumping System Using Perturb and Observation MPPT Technique

ABSTRACT:

 This paper concentrates on solar photovoltaic(PV) water pumping system using perturb and observation maximum power point tracking(MPPT) technique. This whole system is divided into two stages. In the first stage, an arrangement of PV modules is made which is a combination of number PV cells in series or parallel to extract the solar energy and convert into electricity. To maximize the power output of PV module, perturb and observation (P&O) MPPT technique has been used. In its second stage, direct torque and flux control(DTFC) with space vector modulation(SVM) is used to control switching pulses of the voltage source inverter(VSI). The speed of induction motor drive is controlled by DTFC technique. The whole system is developed in MATLAB and outputs are observed.

 KEYWORDS:

  1. Solar PV array
  2. MPPT
  3. P&O Algorithm
  4. DC-DC Boost converter
  5. DTFC-SVM
  6. Induction motor

 SOFTWARE: MATLAB/SIMULINK

CONCLUSION:

In this paper control methods which regulates the flow rate of water supply of solar powered based water pumping systen using IMD is illustrated. From the simulation results it can be concluded that this system has good performance. As per view of irrigation system , the SPV array has been operated under standard enviromental conditions. The system is operated on maximum power by using P&O MPPT algorithm. Water flow rate and stator current of motor is controlled by the speed PI controller.

 REFERENCES:

 [1] U. Sharma, S. Kumar, and B. Singh, “Solar array fed water pumping system using induction motor drive,” 1st IEEE Int. Conf. Power Electron. Intell. Control Energy Syst. ICPEICES 2016, 2017.

[2] M. A. G. De Brito, L. P. Sampaio, L. G. Jr, G. A. Melo, and C. A. Canesin, “Comparative Analysis of MPPT Techniques for PV Applications,” pp. 99–104, 2011.

[3] D. P. Hohm, “Comparative Study of Maximum Power Point Tracking Algorithms Using an Experimental, Programmable, Maximum Power Point Tracking Test Bed,” 2000.

[4] S. Member, “A Comparative study of different MPPT techniques using different dc-dc converters in a standalone PV system,” pp. 1690–1695, 2016.

[5] Z. Ben Mahmoud, M. Ramouda, and A. Khedher, “A Comparative Study of Four Widely-Adopted MPPT Techniques for PV Power Systems,” no. 1, pp. 16–18, 2016.

Solar Power Based Two Level Inverter Fed DTFC SVM of a Sensorless IM Drive

ABSTRACT:

 This paper presents a solar power based two level inverter fed sensorless induction motor drive (SIMD) with space vector modulation based direct torque and flux control (DTFCSVM) for the water pumping applications. Due to the robustness and the flexible operating characteristics, induction motor is most suitable for water pump system. The back emf based model reference adaptive system (MRAS) is used to estimate the speed of the motor. This sensorless MRAS based speed estimation technique is independent to the changes in the temperature and it makes the system simple, robust and economic. Moreover, it reduces the complexity while implementing the hardware setup. DC/DC boost converter along with perturb and observe method of maximum power point tracking (MPPT) control technique is employed to draw sophisticated power from the solar photovoltaic (PV) array. The DTFC-SVM of an IMD using basic two level inverter is proposed for water pumping application. The proposed method is simulated in MATLAB/SIMULINK environment and simulated results are presented under various operating conditions.

KEYWORDS:

  1. Direct torque and flux control
  2. Sensorless induction motor drive
  3. Space vector modulation
  4. Photovoltaic array

SOFTWARE: MATLAB/SIMULINK

CONCLUSION:

It has been concluded that the solar power based basic two level inverter fed sensorless induction motor drive with DTFC-SVM using proportional-integral controller (PIC) is simple,robust,reduces the complexity while desgningthe hard ware setup hence it is quite suitable for the water pumping applications. The solar panel has been operated at the peak values of voltage, current and power by using a simple perturb and observe method of MPPT algorithm, and the required DC output voltage achieved by using DC/DC boost converter. From the simulation results we can conclude that the basic two level-SVM based sensorless IM drives can provide good performance and less ripple content in torque , fluxes.

REFERENCES:

[1] G. S Buja and Kazmierkowski. M. P, “DTC of pwm inverter-fed AC motors – A Survey”, IEEE Trans. on Ind. Elec., vol. 54, no. 5, pp. 744 – 757, 2004.

[2] J. Rodriguez, J. S. Lai, and F. Z. Peng, “Multilevel inverters: a survey of topologies, controls, and applications,” IEEE Trans. Ind. Electron., vol.49, no.4, pp.724-738, 2002.

[3] Tejavathu Ramesh, Anup Kumar Panda, and S. Shiva Kumar. “MRAS Speed Estimator Based on Type-1 and Type-2 Fuzzy Logic Controller for the Speed Sensorless DTFC-SVPWM of an Induction Motor Drive.” Journal of Power Electr., vol. 15, No. 3, pp. 730-740, 2015.

[4] Shukla, Saurabh, and Bhim Singh. “MRAS based speed estimation of single stage solar powered vector controlled induction motor drive for water pumping.” Power India International Conference (PIICON), 2016 IEEE 7th. IEEE, 2016.

[5] Shukla, Saurabh, and Bhim Singh. “Single Stage PV Array Fed Speed Sensorless Vector Control of Induction Motor Drive for Water Pumping.” IEEE Transactions on Industry Applications (2018).