Control and energy management of a large scale grid connected pv system
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This document presents a novel control strategy for managing a grid-connected photovoltaic system to enhance power quality while maximizing power generation. The strategy emphasizes active power production, followed by reactive power compensation and active filtering, ensuring the system operates within its power limits. Simulation results demonstrate the effectiveness of the proposed approach in optimizing power generation and improving power quality.
Control and energy management of a large scale grid connected pv system
- 1. ELECTRICAL PROJECTS USING MATLAB/SIMULINK Gmail: asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in 0-9347143789/9949240245 For Simulation Results of the project Contact Us Gmail: asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in 0-9347143789/9949240245 Control and energy management of a large scale grid- connected PV system for power quality improvement ABSTRACT: Power quality is highlighted as an important parameter in modern power systems. Moreover, grid-connected photovoltaic power plants are increasing significantly in size and capacity. Elsewhere, due to the progressive integration of nonlinear loads in the grid, the principal role of a Solar Energy Conversion System (SECS) is not only to capture the maximum power from solar but, also to ensure some ancillary services and improve the quality of power. This paper presents a novel strategy dedicated to improve the management of active power generation, reactive power compensation and power quality of a SECS, while guaranteeing the possibility of exploiting the full capacity of the Power Conditioning System (PCS) and the PhotoVoltaic System (PVS). The proposed control algorithm is applied to a large scale PVS connected to the grid through a cascade of a DC-DC converter and a PWM inverter. This control strategy manages the SECS function’s priorities, between main active power generation, reactive power compensation and active filtering in such a way to guarantee a smooth and stable DC voltage and ensure a sinusoidal grid current. Top priority is given to the active power production over power quality improvement. Then, priority is given to reactive power compensation over mitigation of current harmonics absorbed by the non-linear load connected to the Point of Common Coupling (PCC). Moreover, the whole system upper limits of active and reactive powers have been determined in the (PQ) power plane on the basis of PVS available power, converters rated power and DC bus voltage smoothness and stability. Finally, a control procedure dedicated to the calculation of the inverter current commands is proposed in order to exploit the full capacity of the SECS and respect the determined power limits. Simulation results confirm the effectiveness
- 2. ELECTRICAL PROJECTS USING MATLAB/SIMULINK Gmail: asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in 0-9347143789/9949240245 For Simulation Results of the project Contact Us Gmail: asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in 0-9347143789/9949240245 and the performance of this control strategy and prove that the SECS can operate at its full power whilst the power quality can be improved by reactive power compensation and active filtering. KEYWORDS: 1. Power decoupled control 2. Harmonic currents 3. Power quality 4. Active filtering 5. Reactive power compensation 6. SECS full power exploitation SOFTWARE: MATLAB/SIMULINK CONCLUSION: In this paper, a novel strategy has been proposed to manage and improve the power quality of a grid connected large scale PVS. More accurately, fuzzy logic controllers have been used to guarantee a decoupled control of active and reactive powers injected into the grid. The PWM inverter is controlled in such a way to manage between active power production and power quality improvement without exceeding the whole system power capacity. The proposed priority control block gives top priority to active power production, then reactive power compensation and finally active filtering. The power capability of the whole system has been delimited in the (PQ) power plane (on the basis of the PVS available power, the power electronics converters rated power and the DC bus voltage smoothness and stability) and fully exploited without over- rating, by the calculation of an appropriate portion of current commands in order to ensure a better active filtering quality and keep the inverter current under its limit value corresponding to the whole system power capacity. Simulation results show the effectiveness and the performance of the proposed approach in terms of power generation, reactive power compensation and active filtering.
- 3. ELECTRICAL PROJECTS USING MATLAB/SIMULINK Gmail: asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in 0-9347143789/9949240245 For Simulation Results of the project Contact Us Gmail: asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in 0-9347143789/9949240245 REFERENCES: Ahmad, Z., Singh, S.N., 2018. Improved modulation strategy for single phase grid connected transformerless PV inverter topologies with reactive power generation capability. Sol. Energy 153, 356–375. Aboudrar, I., El Hani, S., Mediouni, H., Bennis, N., Echchaachouai, A., 2017. Hybrid algorithm and active filtering dedicated to the optimization and the improvement of photovoltaic system connected to grid energy quality. Int. J. Renw. Energy Res. 7 (2), 894–900. Arul Murugan, S., Anbarasan, A., 2014. Harmonics elimination in grid connected single phase PV inverter. In: Int. Conference on Engineering Technology and Science, Tamilnadu, India, 10– 11 February 2014, (3) 1, pp. 1474–1480. Albarracin, R., Alonso, M., 2013. Photovoltaic reactive power limits. In: 2013 12th IEEE Int. Conference Environ. Electr. Eng. Wroclaw, Poland, 5–8 May 2013, pp. 13–18. Bhole, N., Shah Dr, P.J., 2017. Enhancement of power quality in grid connected photovoltaic system using predictive current control technique. Int. J. Rece. Innova. Trends in Compu. Communi 5 (7), 549–553.