【導讀】JOrgePhZ,Studentmember,IEEE,VictorCiirdenas,Member,IEEE,HomeroMiranda,Studentmember,lEEE. e-mail:,,,.pensateupto25%voltagesagsand50%voltageswells.converterswitches,executingsnubber-lessoperation.The

　　

【正文】 pable to reproduce the necessary voltage to pensate the load voltage even when the AC mains present a distortion due to the harmonics. VIII. EXPERIMENTAL RESULTS A laboratory prototype to pensate voltage sags and v4 lOV/diV V0t 1 ovidiv [... I...... .......... .+ .... .. ....... ..... . 4 ...$... . . . . . . . Experimental results of the ACAC converter. (a) AC mains, (b) Filtered output voltage ofthe converter, (c) Current in the AC mains. Fig. 15 shows steady state pensation. A 15% of voltage sag is present in the AC mains. Waveform (a) is the voltage of the AC mains, @) is the pensation voltage generated by the converter and (c) is the output voltage. During the pensation, the single phase ACAC converter reproduces the necessary voltage to maintain regulated the voltage in the Ioad. 1615 ......... .......... vi, IOOVidiv VWI 100V/div vo IOOV/div Steady slate pensation results. (a) AC mains, (b) Compensation voltage generated by the converter, (c) Output voltage. Fig. I6 shows the control signals Sla and SIB generated by the DSP to pensate voltage sags. The dead time generated by the FPGA between the turn on and the tum off of the bidirectional switches is equal to lps. .. .... I q .... : .... .... I ............... D 5Vldiv vin 5VIdiv s/* 5Vtdiv SIB 5 VJdiv Fig. 16 Control signals generated by the DSP. (a) Duty cycle, (b) AC mains polarity, (c) SIA switching device, (cj SfB switching device. TX. CONCLUSIONS In this paper a topology to pensate voItage sags and swells simultaneously in critical loads as well as to maintain a continuous regulation in the output voltage has been proposed. The scheme uses a singlephase ACAC converter in matrix arrangement and it has the advantage that energy storage devices are not required. A four step switching technique is used to drive the ACAC converter switches to execute snubberless operations, Simulation and experimental results confirm the good performance of the singlephase ACAC converter and shows a fast response to pensation. x. REFERENCES D. Sabin, An Assessment of Distribution System Power Quality, Vol. 2: Statistical Summy Report, Palo Alto, CA. EPRl Final Report TR106294V2, May 1996. E. Randolph Collins Jr, Arshad Mansoor, “Effects of Voltage Sags on AC Motor Drives”, IEEE 1997 Annucd Textile? Fiber and Film Industry Technical Confzrence, 68 May 1997. E. C. Aeloiza, P. N. Enjeti, L. A. Morin, I. Pitel, “Next Generation Distribution Transformer: To Address power Quality for Critical Loads”, Power Electronics Specialists Conference PESC 2020, Vol. 3, June 2020, pp. 12661271. E. C. Aeloiza, P. N. Enjeti, 0. C. Montero, L. A. Morin, “A~lysis and Design of a New Voltage Sag Compensator for Critical Loads in Electrical Power Distribution Systems”, Industrid Applifionr Cun]erenceL4SZUO2,Vol. 2, 1318de ,pp. 911916. Patrick W. Wheeler, Jon C. Clare, Lee Empringha, Michael Bland, “Matrix Converters: The Technology and Potential for Exploitation”, The Drives and Controls Power Electronics Conference, London, Section 5, March 2020. Patrick W. Wheeler, JOG Rodriguez, Jon C. CLare, Lee Etnpringha, Alejandro Weinstein, “Matrix Converter: A Technology Review”, IEEE Transactions on IndustrirrI Electronics, Vol. 49, Aprit 2020. pp. 276288. J. Adamek, W. Hofmann, M. Ziegler, “Fast Commutation Process and Demand of Bidirectional Switches in Matrix Converters”, Power Electronics Specidisamp。 ConJ’erence PESC 2020, Vol. 3, June 2020, pp. 12811286. Jorge Pkrez, Victor Cirdenas, Felipe Pazos, Sinhut Ram’rez, “Voltage Harmonic CanceIlation in SinglePhase Systems wing a Series Active Filter with a Low Order Controller”, IEEE International Power Electronics Congress CIEP 2092, pp. 270274. Richard Zhang, Mark Cardinal, Paul Szczesny, Mark Dame, “A Grid simulator with ControI of Singlephase Power Converters in DQ Rotatine Frame”. Power Electronics Specialists Conference PESC 2020, fol. 3,2327 June 2020, pp. 14311436. [lo] Mario Gonzalez, Victor Cirdenas, Felipe Pazos, “DQ Transformation Development for Singlephase Systems to Compensate Harmonic Distortion and Reactive Power“, IEEE Internationnl Power Electronics Congress CIEP 2020, Vol. I, 1722 Oct. 2020. 161