PLL-BASED 3? INVERTER CIRCUIT FOR MICROGRID SYSTEM OPERATED BY ELECTROSTATIC GENERATOR

Authors

DOI:

https://doi.org/10.31436/iiumej.v20i1.1071

Keywords:

PSI, PLL, Current Controller, PWM controller, Inverter Switching Topology, Output LCL Filter, Microgrid

Abstract

A current source control based PLL (phase lock loop) technique is one of the most efficient methods for modern 3? synchronized grid power systems. When an inverter circuit is driven by an electrostatic generator with wind power, it encounters some problems, such as static and dynamic turn-on-off switching losses, unbalanced source voltage, low continuous current, higher frequency harmonic distortion, phase angle imbalance, etc. To solve these problems, a series of connected switching inverter modules technique is proposed. It is not only a traditional inverter system, but it also works as a low-frequency ripple current inverter with lower switch losses. A new topology of phase synchronous inverter (PSI) is designed using a PLL current source controller. The input voltage source of the PSI is a high DC voltage from an electrostatic generator (ESG). The modified ESG is capable of generating the HVDC and a continuous moderate amount of current. The proposed switching topology of the inverter is able to control the microgrid power as well as reduce the dynamic and static switching loss. It also reduces the high-frequency harmonic distortion and improves the phase angle error. The output LCL lowpass filter scheme of the inverter is designed to reduce the total harmonic distortion of 1.62%. The PSI circuit is designed and simulated using MATLAB software. In the developed system, the input voltage of 8 k , microgrid frequency of 50Hz, switching frequency of the carrier of 10 kHz, and modulation index of 0.85 are considered to be implemented. The proposed novel microgrid connected PSI switching module design technique has significantly enhanced the power stability. The overall system efficiency improved by 95.52%.

ABSTRAK: Sumber-arus terkawal berdasarkan teknik PLL (fasa litar kunci) adalah satu kaedah cekap bagi sistem moden tenaga grid selaras 3?. Apabila litar songsang (inverter) digerak menggunakan penjana elektrostatik bersama tenaga angin, ia mengalami masalah seperti kehilangan tenaga statik dan dinamik suis hidup-mati, sumber voltan yang tidak seimbang, kurang arus terus, gangguan harmoni frekuensi tinggi, ketidak-seimbangan sudut fasa, dan sebagainya. Bagi menyelesaikan masalah ini, teknik modul suis bersiri dihubung bersama inverter telah dicadangkan. Ini bukan semata-mata teknik lama sistem inverter, tetapi ia juga berfungsi sebagai arus tidak tetap frekuensi-rendah dengan kurang kehilangan tenaga pada suis inverter. Topologi baru fasa inverter tetap (PSI) ini telah direka menggunakan kawalan sumber arus PLL. Sumber voltan masuk PSI ini telah digunakan daripada voltan DC tinggi penjana elektrostatik (ESG). ESG yang diubah suai ini dapat menghasilkan HVDC dan arus terus yang sederhana. Topologi suis inverter yang dicadang ini dapat mengawal kuasa mikrogrid serta mengurangkan kehilangan dinamik dan statik suis. Ia juga mengurangkan gangguan harmoni frekuensi tinggi dan memperbaiki ketidak-seimbangan sudut fasa. Skim tapisan signal keluar yang rendah pada LCL inverter ini direka bagi mengurangkan total gangguan harmoni sebanyak 1.62%. Litar PSI ini direka dan disimulasi menggunakan perisian MATLAB. Dalam sistem yang dibangunkan ini, 8 kVDCvoltan masuk, 50Hz frekuensi mikrogrid, 10 kHz frekuensi suis angkutan dan 0.85 indeks modulasi telah dipertimbangkan untuk kegunaan. Teknik baru modul suis PSI mikrogrid bersambung yang dicadangkan ini mempunyai kepentingan dalam menstabilkan kuasa dan memperbaiki kecekapan sistem keseluruhan sebanyak 95.52%.

Downloads

Download data is not yet available.

Metrics

Metrics Loading ...

References

Rahman T., Motakabber, S. M. A., & Ibrahimy, M. I. (2016, July). Phase synchronous inverter for microgrid system. In 2016 International Conference on Computer and Communication Engineering (ICCCE) (pp. 167-171). IEEE. DOI: https://doi.org/10.1109/ICCCE.2016.45

Huangfu Y, Pang S, Nahid-Mobarakeh B, Guo L, Rathore AK, Gao F. (2018). Stability Analysis and Active Stabilization of On-board DC Power Converter System with Input Filter. IEEE Trans. on Industrial Electronics, 65(1):790-799.

Gomes CC, Cupertino AF, Pereira HA. (2018). Damping techniques for grid-connected voltage source converters based on LCL filter: An overview. Renewable and Sustainable Energy Reviews, 81:116-135.

Dasgupta S, Mohan SN, Sahoo SK, Panda SK. (2013). Lyapunov function-based current controller to control active and reactive power flow from a renewable energy source to a generalized three-phase microgrid system. IEEE Trans. on Industrial Electronics, DOI: https://doi.org/10.1109/TIE.2012.2206356

(2):799-813.

Rahman T, Ibrahimy MI, Motakabber SM, Mostafa MG. (2014). Three phase three-layer phase synchronous inverter for microgrid system. In Computer and Communication Engineering (ICCCE), pp 44-47. DOI: https://doi.org/10.1109/ICCCE.2014.25

Cao Y, Xu Y, Li Y, Yu J, Yu J. (2017). A Lyapunov stability theory-based control strategy for three-level shunt active power filter. Energies, 10(1):112.

Rahman T., Motakabber, S. M. A., & Ibrahimy, M. I. (2017). A Zero Crossing PWM Controller of a Full Bridge Single Phase Synchronous Inverter for Microgrid Systems. International Journal of Engineering and Information Systems, 1(6), 202-211.

Yue Y, Chen Y, Luo A, Ma F, Xu Q, He Z. (2017). Robust predictive dual-loop control method based on Lyapunov function stability and energy equilibrium though double-core processors for active power filter. International Journal of Electrical Power & Energy Systems, 89:69-81.

Rahman T, Ibrahimy M I, Motakabber S M A. (2017). Synchronization of output voltage waveforms in phase synchronous inverter with LCL filter for smart grid systems. In 3rd International Conference on Science and Social Research, pp. 6-7.

Costa BL, Bacon VD, da Silva SA, Angélico BA. (2017). Tuning of a PI-MR controller based on differential evolution metaheuristic applied to the current control loop of a shunt-APF. IEEE Trans. on Industrial Electronics, 64(6):4751-4761.

Rahman T, Motakabber SM, Ibrahimy MI. (2016) Design of a switching mode three-phase inverters. In Computer and Communication Engineering (ICCCE), pp.155-160. DOI: https://doi.org/10.1109/ICCCE.2016.43

Jayalath S, Hanif M. (2017). Generalized LCL-filter design algorithm for grid-connected voltage-source inverter. IEEE Trans. on Industrial Electronics, 64(3):1905-1915.

Rahman T, Motakabber S M A, Ibrahimy M I. (2016). Low noise inverter for polyphase microgrid system. In Computer and Communication Engineering (ICCCE), pp172-176.

Abdelrahem, M., Hackl, C. M., & Kennel, R. (2018). Finite position set-phase locked loop for sensorless control of direct-driven permanent-magnet synchronous generators. IEEE Transactions on Power Electronics, 33 (4), 3097-3105. DOI: https://doi.org/10.1109/TPEL.2017.2705245

Rahman T., Motakabber, S. M. A., Ibrahimy, M. I., & Rahman, M. W. (2017). An Enhanced Zero Crossing Based HVAC Phase Synchronous Inverter for Electrostatic Generator in Microgrid Systems. Indonesian Journal of Electrical Engineering and Informatics (IJEEI), 5(4), 285-294. DOI: https://doi.org/10.11591/ijeei.v5i4.357

Mondal, A., & Illindala, M. S. (2018). Improved frequency regulation in an islanded mixed source microgrid through coordinated operation of DERs and smart loads. IEEE Transactions on Industry Applications, 54(1), 112-120. DOI: https://doi.org/10.1109/TIA.2017.2761825

Rahman T, Motakabber SMA, Ibrahimy MI. (2017). Design and Simulation of a PWM Based Phase Synchronous Inverter for Utility Grid Systems with 20 km Feeder Line. Scientific Research Journal, 14(2):17-34.

Downloads

Published

2019-06-01

How to Cite

Motakabber, S., Rahman, T., Ibrahimy, M. I., & Alam, A. H. M. Z. (2019). PLL-BASED 3? INVERTER CIRCUIT FOR MICROGRID SYSTEM OPERATED BY ELECTROSTATIC GENERATOR. IIUM Engineering Journal, 20(1), 177–193. https://doi.org/10.31436/iiumej.v20i1.1071

Issue

Section

Electrical, Computer and Communications Engineering

Most read articles by the same author(s)