Overview
The Dulcinea Solar Plant is an operational photovoltaic power station located in Cuenca, Spain. As a significant solar energy infrastructure project, the facility utilizes direct current photovoltaic technology to convert solar radiation into electricity for the regional grid. The plant is characterized by its substantial land footprint and specific module composition, designed to maximize energy yield in the local climatic conditions of the Cuenca province.
The installation has a total installed capacity of 31.8 MW, contributing to the renewable energy mix in the region. The physical infrastructure occupies a total area of 230,324 m2 (2,479,186.9 ft2), providing ample space for the arrangement of hundreds of generating units. This extensive land use allows for optimal panel orientation and spacing to minimize shading and enhance overall system efficiency.
Technical Configuration
The power station is composed of 300 photovoltaic generating units. The system is equipped with a diverse array of photovoltaic modules to optimize performance. This includes 82,896 Kyocera KC-200-GHT2 modules, 6,078 Kyocera KD-210-GHP2 modules, and 66,286 Suntech STP-210/18Ud modules. The combination of these specific module types reflects the technological choices made during the plant's design and construction phases.
Electrical configuration involves 6,600 strings of 24 photovoltaic panels linked in series. Power conversion is handled by 300 SMA SC100-Outdoor solar inverters, which transform the direct current generated by the panels into alternating current suitable for grid integration. The local solar resource is significant, with an estimated available radiation of 1,810 kWh/m2 per year. This radiation level corresponds to approximately 1,497 peak sunlight hours annually, providing a strong basis for the plant's energy production potential.
Technical Specifications and Module Configuration
The Dulcinea Solar Plant utilizes a diverse configuration of photovoltaic modules to achieve its total installed capacity of 31.8 MW. The facility is equipped with a specific mix of panels from two major manufacturers: Kyocera and Suntech. This heterogeneous module selection is a defining technical characteristic of the station's design.
The plant incorporates 82,896 Kyocera KC-200-GHT2 modules. The total number of photovoltaic modules is the sum of these three distinct types. The choice of specific models reflects the technological standards available at the time of construction and optimization for the local radiation profile.
| Module Model | Manufacturer | Quantity |
|---|---|---|
| KC-200-GHT2 | Kyocera | 82,896 |
| KD-210-GHP2 | Kyocera | 6,078 |
| STP-210/18Ud | Suntech | 66,286 |
These modules are organized into 6,600 strings, with each string consisting of 24 photovoltaic panels linked in series. This series configuration determines the voltage profile of the direct current (DC) input to the inverters. The plant is equipped with 300 SMA SC100-Outdoor solar inverters to convert the DC power into alternating current (AC) for grid integration. The inverter model is specifically designed for outdoor installation, contributing to the spatial layout of the 230,324 m2 site.
The technical performance of these modules is influenced by the local solar resource. The estimated available radiation is 1,810 kWh/m2 per year, which corresponds to approximately 1,497 peak sunlight hours annually. This radiation data is critical for understanding the energy yield potential of the Kyocera and Suntech modules installed at the Cuenca location.
Electrical Infrastructure and Inverters
The electrical infrastructure of the Dulcinea Solar Plant is designed to efficiently convert and condition the direct current (DC) generated by the photovoltaic array into alternating current (AC) suitable for grid integration. The system architecture relies on a specific string configuration and a dedicated inverter fleet to manage the power flow from the panels to the output terminals.
Photovoltaic String Configuration
The plant’s DC side is organized into 6,600 distinct strings, as documented in the technical specifications of the facility. Each string consists of 24 photovoltaic panels linked in series. This series connection ensures that the voltage outputs of the individual modules add up, creating a higher DC voltage level that is optimal for the subsequent inversion stage. The choice of 24 panels per string represents a balance between maximizing voltage to reduce current-related losses and managing the maximum power point tracking range of the inverters.
The panels within these strings are not uniform; they are drawn from the three specific module types installed at the site. The mixing of these different module technologies within the 6,600 strings requires careful electrical matching to minimize mismatch losses, although the specific distribution of module types across the strings is detailed in the plant’s design records. The total count of panels across all strings aligns with the sum of the individual module counts provided in the facility’s inventory.
Inverter System
For power conversion, the Dulcinea Solar Plant utilizes 300 SMA SC100-Outdoor solar inverters. These units are responsible for converting the DC power from the 6,600 strings into AC power. The SMA SC100-Outdoor is a specific model designed for outdoor installation in utility-scale photovoltaic plants, featuring robust enclosures and integrated transformers or connection points suitable for the 31.8 MW total capacity of the station. The use of 300 inverters indicates a distributed conversion strategy, where multiple inverters share the load of the total array, enhancing system reliability and allowing for modular maintenance.
The ratio of inverters to strings suggests that each SMA SC100-Outdoor inverter manages a subset of the 6,600 strings. This configuration allows for efficient maximum power point tracking (MPPT) across the varying irradiance conditions experienced by the panels. The inverters are critical components in determining the overall efficiency of the plant, converting the electrical energy generated by the Kyocera and Suntech modules into a form that can be fed into the Spanish grid. The technical specifications confirm that these 300 units are the sole inversion technology employed at the Dulcinea site, forming the backbone of the plant’s electrical output system.
Site Location and Solar Resource
The Dulcinea Solar Plant is situated in the province of Cuenca, Spain, within the autonomous community of Castile-La Mancha. The facility occupies a total land area of 230,324 m2 (2,479,186.9 ft2), providing sufficient spatial extent for the deployment of its photovoltaic array. The plant’s geographic position is defined by the coordinates 39.65833333, -2.80305556, placing it in a region characterized by significant solar irradiance, which is a critical factor for the efficiency of photovoltaic generating units in the Iberian Peninsula.
Solar Resource and Irradiance
The energy yield potential of the Dulcinea Solar Plant is directly influenced by the local solar resource. The site benefits from an estimated available radiation of 1,810 kWh/m2 per year. This metric represents the total solar energy received per square meter of the photovoltaic modules over a twelve-month period, accounting for atmospheric conditions, seasonal variations, and geographic latitude. High annual irradiance values are essential for maximizing the capacity factor of utility-scale solar farms, ensuring that the installed capacity of 31.8 MW translates into substantial annual energy production.
In addition to total irradiance, the site experiences 1,497 peak sunlight hours annually. Peak sunlight hours, often referred to as Peak Sun Hours (PSH), normalize solar intensity to a standard value of 1,000 W/m2. This figure indicates that the solar array at Dulcinea receives the equivalent of 1,497 hours of full-intensity sunlight each year. This parameter is crucial for sizing the photovoltaic modules and inverters, as it directly impacts the direct current (DC) to alternating current (AC) conversion efficiency and the overall energy output of the 300 photovoltaic generating units.
The combination of high annual radiation and significant peak sunlight hours makes the Cuenca location highly suitable for photovoltaic energy generation. The solar resource data supports the technical design of the plant, which utilizes a mix of Kyocera and Suntech photovoltaic modules optimized for the local climatic conditions. The geographic and meteorological characteristics of the site are fundamental to the operational performance and economic viability of the Dulcinea Solar Plant.
Why it matters
The Dulcinea Solar Plant represents a significant case study in the deployment of mixed-module photovoltaic technology within the regional energy infrastructure of Cuenca, Spain. The facility’s configuration is characterized by the integration of three distinct photovoltaic module types: 82,896 Kyocera KC-200-GHT2 modules, 6,078 Kyocera KD-210-GHP2 modules, and 66,286 Suntech STP-210/18Ud modules. This specific combination of hardware is notable for its diversity in a single operational site, utilizing both Kyocera and Suntech technologies to achieve a total installed capacity of 31.8 MW. The plant is further equipped with 300 SMA SC100-Outdoor solar inverters, which manage power conversion from 6,600 strings of 24 photovoltaic panels linked in series. This technical architecture allows for a detailed analysis of performance variances between different module manufacturers and specifications under identical environmental conditions.
Regional Energy Context
Located in Cuenca, the Dulcinea Solar Plant contributes to the solar infrastructure of the province, leveraging the local solar resource potential. These meteorological factors are critical for the efficiency of the photovoltaic generating units, which consist of 300 individual generating units covering a total area of 230,324 m2. The operational status of the plant as an active solar farm underscores the role of medium-scale photovoltaic installations in diversifying the energy mix in central Spain. The use of specific module types, such as the Kyocera KC-200-GHT2 and Suntech STP-210/18Ud, reflects the technological landscape available during the plant's development phase, providing a benchmark for subsequent solar projects in the region. The plant’s design, including the series-linking of panels and the specific inverter selection, demonstrates an engineering approach optimized for the local irradiance levels and the physical constraints of the 230,324 m2 site area.
How does the Dulcinea Solar Plant compare to other Spanish PV stations?
The Dulcinea Solar Plant’s technical specifications offer a snapshot of mid-scale photovoltaic infrastructure in Spain, characterized by a total capacity of 31.8 MW and a specific module configuration. With an installed base of 300 photovoltaic generating units, the station occupies a land area of 230,324 m2 (2,479,186.9 ft2) in Cuenca. This footprint translates to a module density that can be contextualized against typical Spanish PV installations, which often vary significantly based on terrain and technology generation.
Module Composition and Technology
The plant utilizes a mixed inventory of photovoltaic modules, reflecting procurement strategies common in its era of construction. This diversity in hardware is managed through 6,600 strings, each comprising 24 photovoltaic panels linked in series. Power conversion is handled by 300 SMA SC100-Outdoor solar inverters, indicating a ratio of one inverter per generating unit.
Comparative Context
At 31.8 MW, Dulcinea represents a medium-sized utility-scale installation. While modern Spanish solar farms frequently exceed 50 MW or even 100 MW per site, plants in the 30–40 MW range remain prevalent, particularly in regions with specific grid connection constraints or topographical limitations. The estimated available radiation of 1,810 kWh/m2 per year, equating to 1,497 peak sunlight hours, positions Cuenca as a competitive location for solar generation, comparable to other central Spanish provinces like Guadalajara or Toledo.
| Metric | Dulcinea Solar Plant |
|---|---|
| Total Capacity | 31.8 MW |
| Land Area | 230,324 m2 |
| Generating Units | 300 |
| Inverters | 300 SMA SC100-Outdoor |
| Peak Sunlight Hours | 1,497 hours/year |
The plant’s design prioritizes modular scalability through its string configuration. The use of 24-panel strings allows for standardized maintenance and voltage optimization, a common engineering choice for plants of this capacity. Compared to newer installations utilizing higher-efficiency bifacial modules or tracking systems, Dulcinea’s fixed-tilt, mixed-module approach reflects the technological standards of its commissioning period, balancing cost-efficiency with reliable output in the Cuenca solar regime.
What are the key technical challenges of mixed-module PV arrays?
The Dulcinea Solar Plant utilizes a heterogeneous mix of photovoltaic modules, incorporating 82,896 Kyocera KC-200-GHT2 units, 6,078 Kyocera KD-210-GHP2 units, and 66,286 Suntech STP-210/18Ud units. This multi-vendor, multi-model configuration introduces specific technical challenges related to string matching and inverter optimization. In a photovoltaic array, modules connected in series share the same current, meaning the string's output is often limited by the module with the lowest current, a phenomenon known as the "battleground effect" or "string mismatch."
String Configuration and Mismatch Losses
With 6,600 strings of 24 panels linked in series, the plant relies on precise string configuration to mitigate losses. Mixing Kyocera KC-200-GHT2 and KD-210-GHP2 modules, which may have different current-voltage (I-V) characteristics, requires careful grouping. If modules with significantly different short-circuit currents (Isc) are placed in the same string, the excess current from higher-performing modules is dissipated as heat, often across bypass diodes, reducing the overall string efficiency. The Suntech STP-210/18Ud modules, being a different brand and model, further complicate this matching. Without uniform module types, the "lowest common denominator" effect can reduce the peak power output of individual strings, particularly under partial shading or temperature variations.
Inverter Matching and Power Point Tracking
The plant is equipped with 300 SMA SC100-Outdoor solar inverters, each handling a subset of the 6,600 strings. SMA inverters utilize Maximum Power Point Tracking (MPPT) to optimize energy harvest. However, when strings with different module types feed into the same MPPT channel, the inverter must find a single voltage-current operating point that maximizes the combined output. If the I-V curves of the Kyocera and Suntech modules differ significantly, the MPPT algorithm may settle on a sub-optimal point, leading to "MPPT mismatch losses." This is particularly relevant given the plant's estimated 1,497 peak sunlight hours per year; efficient tracking is crucial to capture the available 1,810 kWh/m2 of radiation. The use of 300 inverters for 6,600 strings suggests a ratio of 22 strings per inverter, requiring robust MPPT channels to handle the diversity of the 31.8 MW total capacity. Proper engineering of these string-inverter relationships is essential to minimize the efficiency penalty of the mixed-module design.