Design and Performance Analysis of On-grid Solar Photovoltaic System with single axis tracking

Design and Performance Analysis of On-grid Solar Photovoltaic System with single axis tracking

Shaikh Muhammad Moinuddin, Purshottam Ramsharan Sharma, Mohamed Ali Mohamed Sufiyan Bangdiwalla, Mohd Sadik Mohd Raees Idrisi

M. H. Saboo Siddik Polytechnic

1. ABSTRACT: This paper presents the design and performance analysis of an on-grid solar photovoltaic (PV) system integrated with a single-axis tracking mechanism. The system is designed using site-specific solar irradiation data and grid requirements to maximize energy generation. The single- axis tracker enables continuous alignment of PV modules with the sun, enhancing power output compared to fixed-tilt systems. Performance is evaluated through energy yield, performance ratio, capacity utilization factor, and system efficiency under varying climatic conditions. Results demonstrate improved annual energy production and reliable grid integration, confirming the technical feasibility and economic potential of single-axis tracking in grid-connected solar applications.

2. INTRODUCTION:

   The rapid increase in global energy demand and growing environmental concerns have accelerated the transition toward renewable energy sources. Among various alternatives, solar photovoltaic (PV) technology has emerged as one of the most promising solutions due to its scalability, reliability, and declining installation costs. Grid-connected (on-grid) solar PV systems are particularly attractive because they allow efficient power exchange with the utility grid while reducing dependence on conventional fossil-fuel-based generation.

   However, the performance of conventional fixed-tilt PV systems is limited by their inability to continuously capture maximum solar radiation throughout the day. To overcome this limitation, solar tracking mechanisms have been introduced. A single-axis tracking system adjusts the orientation of PV modules along one axis, enabling improved alignment with the suns movement and thereby increasing energy yield.

   This study focuses on the design and performance analysis of an on-grid solar PV system integrated with a single-axis tracking mechanism. The system is developed considering site-specific solar resources, grid standards, and operational requirements to evaluate its technical effectiveness and energy generation potential under real climatic conditions.

3. FUNDAMENTAL ASPECTS AND PRACTICAL SIGNIFICANCE OF SOLAR ENERGY

   TECHNOLOGIES:

   Solar energy technology is founded on the direct and indirect conversion of solar radiation into usable forms of energy, primarily electricity and heat. The core scientific principle behind solar photovoltaic (PV) systems is the photovoltaic effect, in which semiconductor materials such as crystalline silicon generate electrical current when exposed to sunlight. When photons strike the semiconductor surface, they transfer energy to electrons, enabling their movement and producing direct current (DC) electricity.

   The efficiency and performance of solar PV systems depend on several critical parameters, including solar irradiance, ambient temperature, spectral distribution of sunlight, angle of incidence, and material properties of the PV cells. System design considerations such as module orientation, tilt angle, tracking mechanisms, inverter efficiency, and grid synchronization significantly influence overall energy output. Continuous advancements in cell technology, such as monocrystalline, polycrystalline, and thin-film modules, along with improvements in power electronics and energy storage integration, have enhanced conversion efficiency and system reliability.

   Solar energy technology has emerged as a cornerstone of global sustainable energy strategies. It provides a clean, renewable, and environmentally friendly alternative to fossil- fuel-based power generation, thereby reducing carbon emissions and mitigating climate change impacts. Solar PV systems are scalable and adaptable, making them suitable for residential rooftops, commercial buildings, industrial plants, and large-scale utility projects.

   Grid-connected solar systems contribute to energy security, reduce transmission losses through decentralized generation, and lower long-term electricity costs. Furthermore, supportive government policies, declining module prices, and technological innovations have improved the economic viability of solar installations worldwide. As countries

   transition toward low-carbon economies, solar energy technology plays a crucial role in achieving energy sustainability, environmental protection, and long-term economic development.

4. TYPES OF SOLAR POWER SYSTEMS: ON-GRID AND OFF-GRID CONFIGURATIONS:

   Solar photovoltaic (PV) power systems are broadly classified into on-grid and off-grid configurations based on their interaction with the utility grid. Each configuration is designed to meet specific energy requirements, site conditions, and economic considerations, making them suitable for different applications worldwide.

   1. : image of on grid solar system

      On-grid solar power systems, also known as grid-connected systems, are directly linked to the public electricity network. These systems primarily consist of solar PV modules, grid- tied inverters, and protection devices. The grid acts as virtual energy storage, allowing excess electricity generated during peak sunlight hours to be exported to the utility grid through net metering mechanisms. On-grid systems are characterized by high efficiency, lower initial investment (due to the absence of batteries), and reduced maintenance requirements. However, they are dependent on grid availability and typically shut down during power outages for safety reasons.

      Off-grid solar power systems operate independently of the utility grid and are designed to supply electricity in remote or rural areas where grid access is limited or unreliable. These systems include solar PV modules, charge controllers,

   2. : image of off-grid solar system

      battery banks for energy storage, and off-grid inverters. Off- grid configurations ensure energy availability during night- time or cloudy conditions, providing complete energy autonomy. While they offer reliability and independence, off- grid systems involve higher capital costs and require careful battery management and periodic maintenance.

   3. : image of Hybrid solar system

      Hybrid solar power system integrates the advantages of both on-grid and off-grid configurations by combining solar photovoltaic (PV) generation with battery energy storage and utility grid connectivity. This configuration is designed to ensure uninterrupted power supply, improved energy reliability, and optimized utilization of renewable energy.

5. SYSTEM ARCHITECTURE AND COMPONENTS OF GRID-CONNECTED SOLAR PV SYSTEM:

   1. of Top Solar Panel:

   A solar rooftop panel is a photovoltaic (PV) module installed on the roof of residential, commercial, or industrial buildings to generate electricity from sunlight.

   These panels convert solar radiation into direct current (DC) electricity using the photovoltaic effect. The generated DC power is then converted into alternating current (AC) by an inverter for household or grid use.

   Capacity of plant=1.2 Kw

   1. No. of Panel =5 Connection= Series

   2. Dc Cables :

   DC ables are used to carry direct current from the solar PV modules to the DCDB and then to the inverter. These cables are specially designed for solar in the rating of 4(sq mm) & 6 (sq mm).

   III)DCDB:

   A DCDB is an important protection and distribution unit used in solar photovoltaic (PV) systems. It is installed between the solar panels and the inverter to safely manage the direct current (DC) power generated by the PV modules.

   1. Inverter single phase 3kw:

      The is a transformerless grid-tie solution designed for residential and light commercial rooftop solar systems. It is widely recognized for its high efficiency, reaching up to 98.1% 98.7%, and its robust IP65-rated design suitable for outdoor installation.

   2. ACDB:

      An ACDB is a protection and distribution unit installed between the inverter and the main electrical panel (or grid) in a solar photovoltaic (PV) system. It manages and protects the alternating current (AC) output generated by the inverter.

   3. Ac Cable:-

      An AC cable is used to carry alternating current (AC) power from the inverter to the AC Distribution Box (ACDB), main distribution board, or utility grid in a solar photovoltaic (PV) system.

   4. Maximum Power Point Tracker(MPPT):-

      A Single-Axis MPPT system combines a single-axis solar tracking mechanism with Maximum Power Point Tracking (MPPT) control to maximize the energy output of a solar photovoltaic (PV) system. While the single-axis tracker physically rotates the PV modules along one axis (typically eastwest) to follow the suns movement, the MPPT algorithm electrically adjusts the operating voltage and current to extract maximum power from the panels.

6. COORDINATED OPERATIONAL FRAMEWORK OF SYSTEM COMPONENTS:-

   In an on-grid solar photovoltaic system, different components work together to ensure smooth and efficient power generation. This coordinated operational framework refers to the way each part of the system performs its function while supporting the overall operation of the system.

   The process begins with the PV array, which converts sunlight into direct current (DC) electricity. In systems equipped with single-axis tracking, the panels move along one axis to follow the suns path during the day, allowing them to capture more solar energy. The Maximum Power Point Tracker (MPPT) then adjusts the operating conditions of the PV modules so that the system can produce the highest possible power output.

   1. : Block diagram of On grid solar system

      The generated DC power passes through the DC Distribution Box (DCDB), where protection and switching devices ensure safe power flow. After that, the inverter converts the DC electricity into alternating current (AC) that can be used by electrical loads or supplied to the grid. The AC Distribution Box (ACDB) provides additional protection and control before the electricity is delivered to the utility grid through net metering.

      All these components operate in coordination, ensuring stable system performance, efficient energy conversion, and reliable integration with the power grid. Real-time monitoring systems further help track system performance and support effective operation and maintenance.

7. COST ANALYSIS AND FINANCIAL PERFORMANCE:

   Case Study of the Solar Installation at the Institute:

   A 1.2 kW on-grid solar photovoltaic system installed at the rooftop of Anjuman-I-Islams M.H. Saboo Siddik Polytechnic is designed to generate clean electricity and reduce dependence on conventional grid power. The system consists of solar PV modules, a grid-connected inverter, mounting structure, DC and AC cables, DCDB, ACDB, and a net-metering connection with the utility grid. The approximate installation cost of the system is around

   65,00075,000, including equipment and installation charges. Under favorable solar conditions, the system can generate about 45 kWh of electricity per day, resulting in an annual energy production of approximately 1500 kWh. This generation helps reduce electricity consumption from the grid and can provide annual savings of around 9,00011,000. The estimated payback period of the system is about 56 years, while the operational lifespan of the solar PV system is typically 2025 years. Therefore, the installation demonstrates that small-scale rooftop solar systems are economically viable and environmentally beneficial for educational institutions.

8. LIMITATIONS AND CHALLENGES OF SOLAR PHOTOVOLTAIC TECHNOLOGY:-

   1. Intermittent Energy Source : Solar power generation depends on sunlight availability and cannot produce electricity at night.

   2. Weather Dependency: Cloud cover, rain, and seasonal variations can significantly reduce solar energy production.

   3. High Initial Installation Cost :The cost of PV modules, inverters, mounting structures, and installation can be relatively high.

   4. Limited Conversion Efficiency:Most commercial solar panels convert only a portion of sunlight into electricity.

   5. Energy Storage Requirement :Batteries or other storage systems are needed to supply electricity when solar power is not available.

   6. Large Space Requirement :Large solar power plants require significant land area for installation.

   7. Dust and Dirt Accumulation :Dust, pollution, and bird droppings on solar panels reduce efficiency and require regular cleaning.

   8. Temperature Effect :High temperatures can reduce the efficiency and performance of photovoltaic modules.

   9. Performance Degradation Over Time : Solar panels gradually lose efficiency as they age.

   10. Grid Integration Challenges :Managing voltage stability, frequency control, and power quality can be difficult when integrating solar power into the grid.

   11. Maintenance Requirements: Regular inspection, cleaning, and component replacement are necessary for optimal performance.

   12. Dependence on Advanced Technology: Efficient operation often requires advanced inverters, tracking systems, and monitoring technologies.

   13. Recycling and Disposal Issues : Disposal and recycling of old PV panels can create environmental challenges if not managed properly.

   14. Shading Effects :Shadows from trees, buildings, or other structures can significantly reduce energy output.

   15. Transmission and Distribution Limitations :In remote areas, connecting solar plants to the grid may require additional infrastructure.

9. EMERGING OPPORTUNITIES AND FUTURE TRENDS:-

   1. Advanced Solar Cell Technologies : Development of high-efficiency solar cells such as perovskite and tandem solar cells is expected to significantly increase energy conversion efficiency.

   2. Solar Tracking Systems :The use of single-axis and dual- axis tracking technologies can improve energy generation by enabling panels to follow the suns movement.

   3. Integration with Energy Storage :Combining solar PV systems with battery storage will help provide reliable and continuous power supply even during non-sunny hours.

   4. Smart Monitoring and IoT Integration : Advanced monitoring systems, mobile applications, and IoT-based technologies allow real-time performance tracking and predictive maintenance.

   5. Floting Solar Power Plants: Installing solar panels on water bodies is an emerging trend that helps save land space and improve panel efficiency due to natural cooling.

   6. Building Integrated Photovoltaics (BIPV):

      Solar panels integrated into building materials such as roofs, windows, and facades are gaining popularity in modern infrastructure.

   7. Hybrid Renewable Energy Systems: Combining solar energy with other renewable sources such as wind or hydro can improve system reliability and energy availability.

   8. Improved Grid Integration Technologies : Smart grids and advanced power electronics will enhance the stability and efficiency of grid-connected solar systems.

   9. Reduction in System Cost :Continuous technological advancements and large-scale manufacturing are expected to further reduce the cost of solar PV systems.

   10. Government Policies and Incentives : Supportive policies and incentives worldwide will accelerate the adoption of solar energy technologies.

10. CONCLUSION:

Solar photovoltaic (PV) technology has emerged as a reliable and sustainable solution for meeting the growing global energy demand while reducing dependence on conventional fossil fuels. The design and performance analysis of on-grid solar PV systems, particularly those integrated with single- axis tracking, demonstrate significant improvements in energy generation and overall system efficiency. By optimizing solar radiation capture and ensuring effective power conversion, these systems enhance energy output and support stable grid integration.

Despite certain limitations such as weather dependency and initial investment costs, continuous technological advancements and improved system design are making solar energy more efficient and economically viable. With increasing adoption, supportive policies, and innovations in tracking, monitoring, and energy storage, solar PV systems are expected to play a vital role in the transition toward a clean and sustainable energy future.

REFERENCE:

1. 1.Masters, G. M. (2013). Renewable and Efficient Electric Power Systems (2nd ed.). Wiley.

2. 2.Messenger, R., & Ventre, J. (2010). Photovoltaic Systems Engineering (3rd ed.). CRC Press.

3. 3.Duffie, J. A., & Beckman, W. A. (2013). Solar Engineering of Thermal Processes (4th ed.). Wiley.

4. 4.Luque, A., & Hegedus, S. (2011). Handbook of Photovoltaic Science and Engineering (2nd ed.). Wiley.

5. 5.Kalogirou, S. A. (2014). Solar Energy Engineering: Processes and Systems (2nd ed.). Academic Press.

6. 6.Villalva, M. G., Gazoli, J. R., & Filho, E. R. (2009). Comprehensive approach to modeling and simulation of photovoltaic arrays. IEEE Transactions on Power Electronics, 24(5), 11981208.

7. 7.Esram, T., & Chapman, P. L. (2007). Comparison of photovoltaic array maximum power point tracking techniques. IEEE Transactions on Energy Conversion, 22(2), 439449.

8. 8.International Energy Agency (IEA). (2023). Trends in Photovoltaic Applications. IEA PVPS Report.

9. 9.Fraunhofer Institute for Solar Energy Systems. (2023). Photovoltaics Report.

10. 10.REN21. (2023). Renewables Global Status Report. Renewable Energy Policy Network for the 21st Century.

11. 11.image 4.1- Orientsolar.com

12. 12.image 4.2-Geps solar energy

13. 13.image 4.3-hybrid solar energy

14. 14.image 6.1- R., & Ventre, J. (2010). Photovoltaic Systems Engineering. CRC Press.