Abstract
As the world increasingly turns to renewable energy sources, the integration of solar photovoltaic (PV) systems into the grid has emerged as a pivotal solution. Effective control methods are paramount to harnessing the full potential of these grid-connected PV systems. While existing control methods have laid a foundation, there persists a compelling need for innovative approaches capable of surpassing the limitations of conventional methods. This paper introduces a novel nonlinear control approach utilizing an enhanced Lyapunov function for a single-phase PV/grid electric power system. High-performance operation of the solar PV system, interfacing with a grid-connected single-stage inverter, is achieved through the control of maximum PV voltage using predictive voltage control for MPPT. The enhanced Lyapunov function maintains PV voltage stability at the dc-bus by treating the difference between PV voltage and its reference as a controlled state error. Notably, this approach ensures the stability of the closed-loop PV system even under varying solar irradiances. To achieve full active power injection into the grid with high quality, the proposed enhanced Lyapunov function is augmented by integrating an LCL filter with virtual resistance as an active damping circuit for grid current feedback control. This integration introduces an opposing current to the grid-side inductance current. This compensation mechanism corrects the q-axis grid current using the dq-SRF mathematical model of the global PV/grid system. The LCL parameters and virtual resistance design methods are provided. The effectiveness of the enhanced Lyapunov function is demonstrated through simulations using MATLAB/Simulink software. The results showcase outstanding performance when compared to conventional Lyapunov function and sliding mode control strategies in achieving key objectives, including zero state errors, global stability, and the generation of a sinusoidal grid current signal with low total harmonic distortion and the unit power factor at the point of common coupling.
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Abbreviations
- PVC:
-
Predictive voltage control
- PV:
-
Photovoltaic
- \(P_{{{\text{PV}}}}\) :
-
Output PV power
- \(V_{{{\text{pv}}}}\) :
-
Output PV voltage
- \(I_{{{\text{pv}}}}\) :
-
Output PV current
- \(I_{ph}\) :
-
Light-generated current
- \(I_{{\text{S}}}\) :
-
Diode saturation current
- \(N_{{\text{p}}} ,\;N_{{\text{S}}}\) :
-
Parallel and series PV cells number
- \(R_{{\text{S}}} ,\;R_{sh}\) :
-
Equivalent series and parallel resistances of the PV array
- \(A,\;K,\;T\) :
-
Ideal factor, Boltzmann’s constant and PV cell temperature
- q :
-
Electron’s charge
- MPPT:
-
Maximum power point tracking
- \(V_{mpp}\) :
-
Maximum output PV voltage under each applied irradiance
- \(C_{{\text{F}}}\) :
-
Cost function
- \(T_{S}\) :
-
Time of prediction
- 1,2 :
-
Two possible predictions index
- i :
-
Prediction step
- \(C_{{{\text{dc}}}}\) :
-
Capacitor at the dc-bus
- \(L_{{{\text{inv}}}} ,\;C_{{\text{f}}} ,\;L_{{\text{g}}}\) :
-
Inverter-side inductance, filter capacitor, and grid-side inductance
- \(R_{{{\text{AD}}}}\) :
-
Virtual resistance
- \(R_{{{\text{inv}}}} ,\;R_{g}\) :
-
Internal resistance of both inductances filter
- \(I_{{{\text{inv}}}} ,\;V_{{{\text{inv}}}}\) :
-
Output ac—single-phase inverter current and voltage
- \(I_{L}\) :
-
Grid-side inductance current
- \(I_{{{\text{AD}}}}\) :
-
Active damping current through the virtual resistance
- \(I_{{{\text{grid}}}} ,\;V_{{{\text{grid}}}}\) :
-
Output ac—single-phase grid current and voltage
- \(V_{{\text{C}}}\) :
-
Output voltage across the filter capacitor
- \(I_{{{\text{Load}}}}\) :
-
Nonlinear loads current
- \(\omega_{{\text{g}}} ,\;\omega_{{{\text{res}}}} ,\;\omega_{{{\text{sw}}}}\) :
-
Grid, resonance, and switching frequencies respectively
- SPLL:
-
Single-phase looked loop
- SRF:
-
Synchronous reference frame
- \(\alpha_{d} ,\alpha_{q}\) :
-
Control laws of single-phase single-stage inverter in dq-SRF
- \(T_{1} ,T_{2} ,T_{3} ,T_{4}\) :
-
Switching states of the singe-phase inverter
- \(P_{{{\text{grid}}}} ,\;Q_{{{\text{grid}}}} ,\;S_{{{\text{grid}}}}\) :
-
Active, reactive and apparent powers of the grid
- PCC:
-
Point of common coupling
- THD:
-
Total harmonic distortion
- rms:
-
Root mean square
References
Agarwal RK, Hussain I, Singh B (2017) Three-phase single-stage grid tied solar PV ECS using PLL-less fast CTF control technique. IET Power Electron 10(2):178–188
Aourir M, Abouloifa A, Lachkar I et al (2020) Nonlinear control and stability analysis of single stage grid-connected photovoltaic systems. Int J Electr Power Energy Syst 115:105439
Butt HZ, Awon M, Khalid HA (2018) Performance analysis of a continuous and discretized second order generalized integrator based phase lock loop for single phase grid connected PV systems. In: 2018 international conference on power generation systems and renewable energy technologies (PGSRET), IEEE, pp 1–6
Cha H, Vu TK (2010) Comparative analysis of low-pass output filter for single-phase grid-connected Photovoltaic inverter. In: 2010 twenty-fifth annual ieee applied power electronics conference and exposition (APEC), IEEE, pp 1659–1665
Eren S, Pahlevaninezhad M, Bakhshai A et al (2012) Composite nonlinear feedback control and stability analysis of a grid-connected voltage source inverter with LCL filter. IEEE Trans Ind Electron 60(11):5059–5074
Faraji F, Hajirayat A, Birjandi AAM et al (2017) Single-stage single-phase three-level neutral-point-clamped transformerless grid-connected photovoltaic inverters: topology review. Renew Sustain Energy Rev 80:197–214
Heydari E, Varjani AY, Diallo D (2020) Fast terminal sliding mode control-based direct power control for single-stage single-phase PV system. Control Eng Pract 104:104635
Hoppmann J, Volland J, Schmidt TS et al (2014) The economic viability of battery storage for residential solar photovoltaic systems–a review and a simulation model. Renew Sustain Energy Rev 39:1101–1118
Hussain I, Kandpal M, Singh B (2017) Grid integration of single stage SPV-STATCOM using cascaded 7-level VSC. Int J Electr Power Energy Syst 93:238–252
Ikaouassen H, Raddaoui A, Rezkallah M (2019) Real time implementation of improved predictive model control for standalone power generation system-based PV renewable energy. IET Gener Transm Distrib. https://doi.org/10.1049/iet-gtd.2018.5010
Jain S, Agarwal V (2007) A single-stage grid connected inverter topology for solar PV systems with maximum power point tracking. IEEE Trans Power Electron 22(5):1928–1940
Jiang J, Pan S, Gong J et al (2020) A leakage current eliminated and power oscillation suppressed single-phase single-stage nonisolated photovoltaic grid-tied inverter and its improved control strategy. IEEE Trans Power Electron 36(6):6738–6749
Kan S, Ruan X, Huang X et al (2020) Second-harmonic current reduction for flying capacitor clamped boost three-level converter in photovoltaic grid-connected inverter. IEEE Trans Power Electron 36(2):1669–1679
Khan AA, Eberle W, Wang L et al (2019) Coupled-inductor buck-boost inverter with reduced current ripple. IEEE Trans Power Electron 35(8):7933–7946
Kjaer SB, Pedersen JK, Blaabjerg F (2005) A review of single-phase grid-connected inverters for photovoltaic modules. IEEE Trans Ind Appl 41(5):1292–1306
Komurcugil H, Altin N, Ozdemir S et al (2014) An extended Lyapunov-function-based control strategy for single-phase UPS inverters. IEEE Trans Power Electron 30(7):3976–3983
Komurcugil H, Altin N, Ozdemir S et al (2015) Lyapunov-function and proportional-resonant-based control strategy for single-phase grid-connected VSI with LCL filter. IEEE Trans Ind Electron 63(5):2838–2849
Komurcugil H, Ozdemir S, Sefa I et al (2015) Sliding-mode control for single-phase grid-connected LCL-filtered VSI with double-band hysteresis scheme. IEEE Trans Ind Electron 63(2):864–873
Lekouaghet B, Boukabou A, Lourci N et al (2018) Control of PV grid connected systems using MPC technique and different inverter configuration models. Electr Power Syst Res 154:287–298
Liu B, Wang L, Song D et al (2018) Input current ripple and grid current harmonics restraint approach for single-phase inverter under battery input condition in residential photovoltaic/battery systems. IEEE Trans Sustain Energy 9(4):1957–1968
Liu Y, Xu J, Shuai Z et al (2020) Passivity-based decoupling control strategy of single-phase LCL-type VSRs for harmonics suppression in railway power systems. Int J Electr Power Energy Syst 117:105698
Moutaki K, Ikaouassen H, Raddaoui A (2018a) Improved Lyapunov function based control approach for single-stage inverter grid interfacing solar photovoltaic system. In: International conference on industrial technology (ICIT), 2018 IEEE international conference, IEEE
Moutaki, K, Ikaouassen, H, Raddaoui A (2018b) Lyapunov function based control for grid-interfacing solar photovoltaic system with constant voltage MPPT technique. In: International conference on advanced intelligent systems for sustainable development, Springer, Cham, pp 210–219
Prakash G, Subramani C, Bharatiraja C et al (2016) A low cost single phase grid connected reduced switch PV inverter based on Time Frame Switching Scheme. Int J Electr Power Energy Syst 77:100–111
Radwan AAA, Mohamed YARI (2013) Analysis and active suppression of AC-and DC-side instabilities in grid-connected current-source converter-based photovoltaic system. IEEE Trans Sustain Energy 4(3):630–642
Rezkallah M, Sharma SK, Chandra A et al (2016) Lyapunov function and sliding mode control approach for the solar-PV grid interface system. IEEE Trans Ind Electron 64(1):785–795
Saxena N, Singh B, Vyas AL (2017) Single-phase solar PV system with battery and exchange of power in grid-connected and standalone modes. IET Renew Power Gener 11(2):325–333
Sefa I, Ozdemir S, Komurcugil H et al (2017) Comparative study on Lyapunov-function-based control schemes for single-phase grid-connected voltage-source inverter with LCL filter. IET Renew Power Gener 11(11):1473–1482
Shi Y, Liu B, Duan S (2018) Modelling, control and performance analysis of a single-stage single-phase inverter with reduced low-frequency input current ripple. IET Power Electron 11(6):1074–1082
Wang X, Blaabjerg F, Loh PC (2015) Grid-current-feedback active damping for LCL resonance in grid-connected voltage-source converters. IEEE Trans Power Electron 31(1):213–223
Xu J, Xie S, Tang T (2013) Active damping-based control for grid-connected $ LCL $-filtered inverter with injected grid current feedback only. IEEE Trans Ind Electron 61(9):4746–4758
Yang H, Gong Z, Ma Y et al (2020) Optimal two-stage dispatch method of household PV-BESS integrated generation system under time-of-use electricity price. Int J Electr Power Energy Syst 123:106244
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Ikaouassen, H., Raddaoui, A. & Rezkallah, M. Performance and Stability Analysis of Enhanced Lyapunov Function and Predictive Voltage Control with Active Damping for Single-Phase PV/Grid Electric Power System. Iran J Sci Technol Trans Electr Eng (2024). https://doi.org/10.1007/s40998-023-00686-7
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DOI: https://doi.org/10.1007/s40998-023-00686-7