TECHNICAL PROPOSAL100KWP GRID CONNECTED SOLAR PV SYSTEM

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TABLE OF CONTENT

TECHNICAL PROPOSAL

SYSTEM DESIGN 6

SYSTEM DESCRIPTION 9 SINGlE lINE DIaGRaM 10

SYSTEM CONFIGURaTION 11

BIll OF MaTERIal 15

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i. CUSTOMER REQUIREMENT

The Customer would like to install 100 kWp Grid connected Solar PV Power Plant in region of Thiruchengode, Morur, Tamil Nadu, India.

ii. DESIGN aSSUMPTIONS

Module Facing : True South

Module Tilt angle : 11°

Type of System : Grid Connected System

iii.PROPOSED TECHNOlOGY

The on-grid solar photovoltaic power plant to be proposed shall be consisting of crystalline solar modules with fixed tilt angle mounting systems and the solar inverters shall be of grid interactive type.

iv.BENEFITS OF PROPOSED TECHNOlOGY

The benefit of crystalline technology as compared to other existing technologies is as follows;

It occupies less area when compared to other thin film technologies

Proven technology over years

abundant semiconductor materials to support high volume production and demand.

High volumes of production facilities throughout world

v. ENERGY SIMUlaTION RESUlT

Based on the above inputs & assumption, an energy simulation of solar radiation available at the geographical location for solar modules has been derived from NaSa Surface meteorology and solar energy.

1. SYSTEM DESIGN

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aSSUMPTIONS THaT aRE CONSIDERED FOR CalCUlaTING THE ENERGY YIElD aRE lISTED BElOW

Site : Sri Shanmuga college of Engineering & Technology Thiruchengode, Morur, Tamil Nadu, India.

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VI.DESIGN SUMMaRY

Total Installed capacity : 99.840Kwp

PV Module : 240Wp Crystalline Modules (Kl240)

Total Number of Modules : 416 Numbers

GRID TIE Inverter : 100 kW

Total Number of Inverters : 1No.

approx yearly generation/KWp : 1642.5 kwh/kwp/year**

approx Yearly generation : 164.25 MWh/annum**

** approx average Daily generation : 425 - 475 kwh**

Module Tilt angle : 11Deg

Module orientation : True South

area required for module installation : 900 Sq.mtrs.

** Note

The above values are indicative for the location based on the historical radiation data. The actual data may vary depending on the site conditions.

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I. SOlaR PV GRID CONNECTED SYSTEM

a grid connected system is connected to a large independent grid (typically the public electricity

grid) and feeds power in to the grid. This is a form of decentralized electricity generation. In the

case of residential or building mounted grid connected PV systems, the electricity demand of the

building is met by the PV system. Only the excess is fed in to the grid when there is an excess. The

feeding of electricity in to the grid requires the transformation of DC into aC by a special,grid-con-

trolled inverter.

a Grid Tie inverter or a (GTI) is a special type of Inverter (electrical) that isused in a renewable en-

ergy power system to convert direct current into alternating current and feed it into the utility grid.

The technical name for a grid-tie inverter is”grid-interactive inverter”. They may also be called syn-

chronous inverters. Grid-interactive inverters typically cannot be used in standalone applications

where utility power is not available.

The Grid Tie Solar Inverter is designed to convert solar electric (photovoltaic or PV) power into

utility-grade electricity that can be used by the home or sold to the local power company. In order

to operate, the inverter must have grid power available and connected. It will not provide back up

power if the aC grid fails. The inverter will automatically synchronize itself to grid.The inverter is

provided with the isolation transformer internally with basic insulation.

BlOCK DIaGRaM

2. SYSTEM DESCRIPTION

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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 electri-

cally 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.

The detail technical specifications of both types of modules are provided below.

The major components of the proposed power plant are as follows:

3. SYSTEM CONFIGURATION

S No Item Description

1 Module Crystalline solar modules each of 240Wp

2 Structure Fixed Mounting

3 Inverter GRID TIE Inverter

4 Monitoring System Central Monitoring system

5 Junction box DC Combiner Box(DCCB)

aC Distribution Box(aCDB)

6 Cables PVC Cu Cables

7 accessories accessories for cable inter connection,

installation kit & conduits

8 lightning lightning Protection Units

Technical Specifications for Crystalline Modules – Asper KL 240 specs/equivalent

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ii. MODUlE MOUNTING 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 Mild Steel 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 away that it will occupy minimum

space without sacrificing the output from SPV panels at the same time it will withstand severe wind-

speed upto a maximum150kmph.

iii. JUNCTION BOxES

The junction boxes are dust, vermin, and water proof 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 out-

going cables.

TechnicalSpecification–Module Mounting Structures

Material MS

Overall dimension as per design

Coating Galvanized (GI) Thickness >120 micron

Wind rating 150km/hr

Tilt angle Fixed ,depends on the site latitude

Foundation PCC with bed bolt at ground level

Fixing type SS304/GI fasteners

Technical Specification–Junction Boxes

Material Thermoplastic

Type Dust, Vermin & Waterproof

Hardware SS304

CableGland Thermoplastic

Protection IP65

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iv. GRID CONNECT INVERTER

Grid Tie inverters operate on MPPT (Maximum Power Point Tracking) mode to ensure maximum

output from the solar generators at different ambient conditions. Grid Tie inverters use higher sys-

tem voltages to reach very high plant efficiency. Further more, installations can be expanded with

additions of more modules without problems.

The design of the technical parameters has been optimized with regard to the operating time of

the inverter. For example, the IGBTs not only increase the efficiency factor, but their high dielectric

strength inhibits the transmission of voltage spikes. The intelligent minimum performance recog-

nition system protects the aC contactors and a fast over-current recognition system for all

transistors protects the IGBTs.

With a wide range of input voltages from 400 to 900V, the inverter allows the largest possible range

of module connection possibilities. For larger installations, the proposed inverters can be easily

combined to provide higher performance.

v.MONITORING SYSTEM

Monitoring systems is mainly used to monitor the performance of the Inverter, energy yield, etc.

at optional cost the system provides an extremely flexible interface to facilitate PC- based inverter

monitoring and control via Ethernet, or Internet connections.

Industry-Leading Features and Performance:

Inverter monitoring parameters include: energy yield, power, array voltages, array currents,

aCparameters and temperatures.

Field-Proven Reliability:

Enhanced remote-monitoring capabilities enable the collection and analysis of critical data

needed to facilitate increased power system reliability.

Installer Friendly:

a front-mounted lCD displayprovides visual confirmation of all critical operating parameters.

Compact easy-to-install package with readily-accessible electrical connections.

Technical Specifications for Delta, SMA, Schenider/Equivalent

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Unmatched Applications Flexibility (optional):

active alarm management capabilities with automatic delivery of SMS, e-mail, or fax alarm

messages.

Data logger and display-enabled configurations are available.

vi. CaBlES

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.

The bright-annealed 99.97% pure bare copper conductors that offer low conductor resistance,

they result in lower heating there by increase in life and savings in power consumption. These wires

are insulated with a special grade PVC compound formulated and manufactured in- house. The

skin coloration offers high insulation resistance and long life.

vii. EaRTHING & lIGHTNING PROTECTION

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.

Lightning: The SPV Power Plant shall be provided with lightning & overvoltage 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 subsystem components. The source of overvoltage can be lightning, atmosphere

disturbances etc. Metal oxide variastors shall be provided inside the array Combiner Boxes. In ad-

dition suitable SPD’s also shall be provided in the Inverter to protect the inverter from over voltage.

TechnicalSpecification–Cables

Type PVInsulated,sheath&UVresistance

Material Copper

Voltage Max.1100V

TestVoltage 650V/1.1V

Temperature 10–70°C

Colour Red/Black/Green

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The brief bill of material is provided below as ready reference.

S No Description Quantity

1 240Wp Crystalline Modules (60Cells) 414Nos.

2 Mounting structures as required

3 GRID TIE inverter as required

4 Monitoring System as required

5 Earthing & lightning protection as required

6 Junction boxes as required

7 Cables as required

8 accessories 1Set

4. BILL OF MATERIAL

VRV ENERGIES INDIa PRIVaTE lIMITEDaN ISO 9001 : 2008 COMPaNY

135/B1, Chinnathottam, Udayampalayam Road, Chinnavedampatty, Coimbatore – 641 049. Tamil Nadu, India.

Phone : +91 422 6580005. Mobile : +91 72005 45000.email : info@vrvenergies.com, Website : www.vrvenergies.com