Scope of Work:
- System Design & complete EPC
- Supply of all project related material (Such as PV modules, inverters, Structures etc.,)
- Civil activities which shall consist of module foundation and cable conduit construction.
- Installation & commissioning of all electrical components.
- Project planning & controlling
- All the technical support & documentation required for statutory and regulatory approvals will be supported by MSS POWERTECH.
TECHNOLOGY Offered:
The Solar photovoltaic Roof top power plant to be proposed shall be consisting of Multi crystalline solar modules with fixed tilt angle mounting systems and the solar inverters shall be of String type Inverters.
BENEFITS OF PROPOSED TECHNOLOGY
- It occupies less area when compared to other thin film technologies
- Proven technology over 35 years
- Proven Long-term performance (25 Years )
- Abundant semiconductor materials to support high volume production and demand.
PV Installation Lay out
1. SYSTEM DESCRIPTION
A grid connected system is connected to a large independent grid (typically the public electricity grid) and feeds power into the grid & it’s a system without battery back-up.
A String Inverter is a special type of Inverter (electrical) that is used in Solar Photovoltaic power system to convert direct current into alternating current and fed it into the System. The technical name for a String inverter is “Grid connected String inverter”. They may also be called synchronous inverters. Grid-connected inverters typically cannot be used in standalone applications where utility power is not available.
The String Inverter is designed to convert solar electric (photovoltaic or PV) power into utility- grade electricity that can be used by the local load or sold to the local power company. In order to operate, the inverter must have grid power available and connected. The inverter will automatically synchronize itself to grid. The inverter is provided with the isolation transformer internally with basic insulation.
2. SYSTEM COMPONENTS:
I. SOLAR PV MODULES
II. SOLAR ON GRID – STRING INVERTER
III. STRUCTURE
IV. MONITORING SYSTEM
V. AJB – ARRAY JUNCTION BOX
VI. CABLES
VII. LIGHTNING PROTECTION
VIII. ACCESSORIES FOR CABLE INTERCONNECTION AND INSTALLATION KIT
I. SOLAR PV MODULES
Solar cells produce direct current electricity from light, which can be used to power equipment or to recharge a battery. Cells require protection from the environment and are usually packaged tightly behind a glass sheet. When more power is required than a single cell can deliver, cells are electrically connected together to form photovoltaic modules, or solar panels. A photovoltaic module is a packaged interconnected assembly of photovoltaic cells, which converts sunlight into electrical power. The cells are hermitically sealed between glass and back cover (Tedlar) to protect them from harsh environments.
Module Construction
II. SOLAR ON GRID – STRING INVERTER
The CM is a high-quality central inverter which is used to supply photovoltaically converted solar energy from PV modules to low-voltage networks. The String inverter converts the direct current generated in PV cells into alternating current. This enables you to feed the solar electricity which you have generated into the system or public electricity grid of the utility company. The efficient MPP tracking system ensures that the PV plant operates at maximum efficiency, even on dull days when the sky is cloudy.
With the MPPT concept, PV modules connected in series (strings) or strings at the same voltage so that the amount of wiring in the photovoltaic plant is substantially reduced. The photovoltaic plant can also be optimized to the input voltage range of the inverter by the interconnection in the strings.
The modular design of the inverter takes into account the market requirements for flexible inverter solutions with higher output ranges.
III. STRUCTURES
The module mounting structure is designed for holding suitable number of modules in series. The frames and leg assemblies of the module mounting structures is of M.S. Powder coated of suitable sections of Angle, Channel, Tubes or any other sections conforming to IS:2062 to meet the design criteria. All hardware considered for fastening modules with this structure are of very good quality of Stainless Steel (SS304). The module mounting structure is designed in such a way that it will occupy minimum space without sacrificing the output from SPV panels at the same time it will withstand severe wind speed up to a maximum 150 kmph.
V. AJB – ARRAY JUNCTION BOX
The junction boxes are of dust, vermin, and waterproof and made of Thermo Plastic. The terminals will be connected to copper bus-bar arrangement of proper sizes. The junction boxes will have suitable cable entry points fitted with cable glands of appropriate sizes for both incoming and outgoing cables.
MONITORING SYSTEM
The size of the cables between array interconnections, array to junction boxes, junction boxes to Charge controller etc is so selected to keep the voltage drop and losses to the minimum.
Lightning Protection: The SPV Power Plant will be provided with lightning & over voltage protection. The main aim in this protection shall be to reduce the over voltage to a tolerable value before it reaches the PV or other sub system components. The source of over voltage can be lightning, atmosphere disturbances etc.
Earthing: The array structure of the PV yard will be grounded properly using adequate number of earthing kits. All metal casing / shielding of the plant shall be thoroughly grounded to ensure safety of the power plant.Earthing: The array structure of the PV yard will be grounded properly using adequate number of earthing kits. All metal casing / shielding of the plant shall be thoroughly grounded to ensure safety of the power plant.
