Overview
The Solar One Ceylon Power Station is an operational solar photovoltaic farm located in Welikanda, within the Polonnaruwa District of Sri Lanka. Commissioned in January 2017, the facility represents a significant utility-scale solar installation in the region, with a total installed capacity of 12.56 MW. The station is operated by Solar One Ceylon, which manages the generation assets to feed power into the local grid infrastructure. The project was developed to leverage the high solar irradiance characteristic of the Polonnaruwa region, utilizing advanced tracking technology to maximize energy yield compared to traditional fixed-tilt arrays.
Technical Configuration and Equipment
The power station’s technical design centers on the use of polycrystalline photovoltaic modules manufactured by JA Solar Holdings. The installation incorporates two specific module ratings: 315W and 320W units, which are deployed across the site to optimize power generation under varying irradiance conditions. These modules are mounted on 624 single-axis solar trackers supplied by the Spanish engineering firm Grupo Clavijo. The integration of single-axis tracking allows the panels to follow the sun’s path from east to west throughout the day, thereby increasing the angle of incidence of sunlight on the cell surfaces.
According to the project specifications, the use of these trackers is expected to boost energy production by up to 20% compared to a conventional fixed-tilt setup. This enhancement in yield is critical for improving the levelized cost of energy (LCOE) and maximizing the return on investment for the 12.56 MW capacity. The choice of polycrystalline technology reflects a balance between cost-efficiency and performance, suitable for the climatic conditions of the Polonnaruwa District. The station remains operational, contributing to Sri Lanka’s renewable energy mix and reducing reliance on thermal generation sources in the north-central province.
Technical Specifications
The Solar One Ceylon Power Station utilizes a photovoltaic technology configuration designed to maximize energy yield through specific module selection and tracking systems. The installation comprises polycrystalline solar modules manufactured by JA Solar Holdings. These modules are specified in two power ratings: 315W and 320W. The choice of polycrystalline silicon technology represents a standard approach for utility-scale solar farms, balancing efficiency and cost-effectiveness for the given geographic location in the Polonnaruwa District.
A critical component of the station's technical design is the integration of single-axis solar trackers. The farm is equipped with 624 single-axis trackers supplied by Grupo Clavijo, a Spanish firm specializing in solar tracking solutions. The deployment of these trackers allows the photovoltaic arrays to follow the sun's path across the sky, thereby increasing the duration of peak irradiance exposure compared to static installations. This enhancement is significant for optimizing the capacity factor of the 12.56 MW plant.
The physical footprint of the Solar One Ceylon Power Station covers an area of 19.95 km2. This extensive land use is necessary to accommodate the 624 tracking rows and the associated infrastructure required for the 12.56 MW capacity. The layout within the Welikanda site is designed to minimize shading between adjacent tracker rows while maximizing the utilization of the available land area.
| Parameter | Specification |
|---|---|
| Module Type | Polycrystalline |
| Module Manufacturer | JA Solar Holdings |
| Module Power Ratings | 315W, 320W |
| Tracker Type | Single-axis |
| Tracker Quantity | 624 |
| Tracker Supplier | Grupo Clavijo |
| Production Boost (vs. Fixed Tilt) | Up to 20% |
| Total Area | 19.95 km2 |
Development and Ownership
The development of the Solar One Ceylon Power Station was spearheaded by WindForce (Private) Limited, which served as the primary developer for the project. The ownership structure involves Akbar Brothers, a prominent conglomerate in Sri Lanka, which holds the stake in the solar farm. The project also saw significant financial backing from Hayleys, a major industrial group in the region, which provided key funding to support the construction and operational launch of the facility. These entities collaborated to establish the 12.56 MW solar photovoltaic installation at Welikanda, within the Polonnaruwa District of Sri Lanka.
Construction Timeline
The construction phase for the Solar One Ceylon Power Station was executed over a five-month timeline, culminating in the official commissioning of the plant in January 2017. This rapid development schedule allowed for the timely integration of the solar array into the national grid. The project utilized 315W and 320W polycrystalline modules manufactured by JA Solar Holdings. The selection of single-axis trackers was a strategic technical decision aimed at enhancing energy yield. This technology choice reflects a focus on maximizing output per unit of land area in the Welikanda location. The successful completion of the five-month build phase marked a significant milestone for solar infrastructure in the Polonnaruwa District.
Operational Performance
The Solar One Ceylon Power Station is designed to deliver an expected annual energy production of 20,000 MWh, a figure that reflects the integration of high-efficiency photovoltaic modules with advanced mechanical tracking systems. This output capacity is critical for the grid stability of the Polonnaruwa District, providing a consistent renewable energy source that complements the region's existing hydroelectric and thermal infrastructure. The station's ability to reach this production target relies heavily on the specific technical configuration chosen by the operator, Solar One Ceylon, during the planning and commissioning phases in 2017.
Impact of Single-Axis Tracking Systems
A central component of the station's operational performance strategy is the use of 624 single-axis solar trackers supplied by the Spanish firm Grupo Clavijo. These mechanical systems are engineered to follow the sun's path across the sky throughout the day, ensuring that the photovoltaic panels maintain an optimal angle of incidence relative to solar radiation. This significant efficiency gain is particularly valuable in the tropical climate of Sri Lanka, where solar irradiance can vary due to seasonal monsoon patterns and cloud cover.
The decision to implement single-axis trackers represents a strategic investment in capital expenditure to maximize the levelized cost of energy (LCOE) over the plant's lifespan. While fixed-tilt systems are simpler and require less maintenance, the 20% production increase provided by the Grupo Clavijo trackers allows the Solar One Ceylon Power Station to generate more electricity per square meter of land. This is especially important in the Welikanda location, where land availability may be a constraining factor for future expansion. The trackers adjust the orientation of the 315W and 320W polycrystalline modules manufactured by JA Solar Holdings, ensuring that the panels capture maximum sunlight during peak morning and afternoon hours, as well as midday.
The operational reliability of these tracking systems is essential for maintaining the projected 20,000 MWh annual output. Any mechanical failure or misalignment in the 624 tracker units could reduce the efficiency gains, potentially narrowing the performance gap between the tracked system and a fixed-tilt alternative. Therefore, the maintenance regimen for the Solar One Ceylon Power Station must include regular inspections and calibrations of the tracking mechanisms to ensure they continue to deliver the anticipated 20% boost. This technical approach underscores the importance of integrating hardware optimization with site-specific environmental data to achieve optimal solar farm performance.
Why it matters
The Solar One Ceylon Power Station represents a significant milestone in the diversification of Sri Lanka’s renewable energy portfolio, particularly within the Polonnaruwa District. As a 12.56-megawatt solar photovoltaic facility, it contributes directly to the national grid, helping to alleviate pressure on the country’s traditional hydro and thermal power sources. The project’s operational status since its commissioning in January 2017 underscores its role as a stable, long-term energy asset for the region.
Technological Advancement in Local PV Infrastructure
The technical configuration of the Solar One Ceylon Power Station highlights the integration of advanced tracking systems into Sri Lanka’s solar landscape. This specific technological choice is notable because the single-axis tracking system is expected to boost energy production by up to 20% compared to a conventional fixed-tilt setup. This efficiency gain is critical for maximizing the output per hectare in the Polonnaruwa District, where land availability and solar irradiance are key factors in project economics.
Contribution to the National Grid
By adding 12.56 MW of capacity to the grid, the Solar One Ceylon Power Station supports the broader energy security goals of Sri Lanka. The operational stability of the plant, managed by Solar One Ceylon, ensures a consistent feed of solar energy into the national network. This contribution is particularly relevant during peak sunlight hours, helping to flatten the daily load curve and reducing the need for peaking thermal plants. The project serves as a reference case for future solar developments in the region, demonstrating the viability of large-scale PV farms with tracker technology in the Polonnaruwa District. The successful deployment of Grupo Clavijo’s tracking systems and JA Solar’s modules provides empirical data on performance and maintenance requirements for similar installations in Sri Lanka.
How do single-axis solar trackers improve efficiency?
The Solar One Ceylon Power Station utilizes 624 single-axis solar trackers supplied by the Spanish firm Grupo Clavijo to optimize energy capture. These mechanical systems are designed to increase solar yield by up to 20% compared to a fixed tilt setup, according to the project's technical data. The trackers function by adjusting the angle of the photovoltaic modules to follow the sun's apparent path across the sky, ensuring that the solar panels receive direct irradiance for a longer duration each day.
Mechanical Operation and Solar Tracking
Unlike fixed-tilt systems, which remain at a static angle throughout the day, single-axis trackers rotate along a single axis, typically aligned north-south. This allows the 315W and 320W polycrystalline modules manufactured by JA Solar Holdings to tilt east in the morning and west in the evening. By maintaining a more perpendicular angle to the incoming solar radiation, the trackers reduce the cosine loss that occurs when sunlight strikes a panel at an oblique angle. This mechanical adjustment maximizes the effective surface area exposed to peak solar intensity, particularly during the morning and late afternoon hours when fixed panels are often less efficient.
Efficiency Gains and Yield Improvement
The projected 20% boost in production is a direct result of this dynamic positioning. In a fixed-tilt configuration, the panels are optimized for a specific time of day or season, leading to suboptimal angles during other periods. The Grupo Clavijo trackers mitigate this by continuously adapting to the sun's position, thereby extending the period of peak power generation. This increased efficiency is critical for maximizing the output of the 12.56-megawatt solar photovoltaic farm built in January 2017 at Welikanda, in the Polonnaruwa District of Sri Lanka. The use of polycrystalline modules further complements the tracking system, as these cells often benefit from the extended exposure to direct sunlight provided by the single-axis rotation.
Technical Integration
The integration of 624 individual tracking units requires precise coordination to ensure uniform movement and minimal shading between adjacent rows. The system is designed to operate reliably in the local climate conditions of the Polonnaruwa District, maintaining the structural integrity of the JA Solar Holdings modules while optimizing their electrical output. This technological choice reflects a strategic decision to enhance the energy density of the site, allowing the Solar One Ceylon operator to achieve higher annual energy production from the same land area compared to traditional fixed-tilt installations.