NTPC - Limited Hazaribaug Jharkhand

METHODOLOGY FOR 3 kW GRID-CONNECTED SOLAR TREE
1. Project Details

Project: NTPC Limited – Hazaribaug, Jharkhand
System: 3 kW Grid-Connected Solar Tree
PV Modules: 6 Nos. × 560 Wp Mono-Crystalline Modules
Inverter: Grid-Connected On-Grid Inverter
Structure: Leaf-Shaped Module Mounting Structure
Approx. Height: 7 m
Approx. Width: 6.5 m

2. Scope of Work

The work includes site preparation, foundation work, fabrication and erection of the solar tree structure, installation of PV modules, inverter, DC/AC cabling, earthing, protection systems, testing, commissioning and final handover.

3. Site Preparation

The site shall be inspected and verified for location, orientation, access, existing utilities and grid connection. The solar tree location and foundation points shall be marked as per the approved drawings. All materials shall be inspected before installation.

4. Foundation & Structure Installation

The foundation shall be constructed as per the approved structural drawings, including excavation, reinforcement, anchor bolts and concreting. After the foundation achieves the required strength, the solar tree structure and leaf-shaped MMS shall be erected, aligned, levelled and securely tightened using suitable lifting equipment.

5. Solar Module Installation

Six 560 Wp mono-crystalline solar modules shall be installed on the MMS using approved clamps and fasteners. The modules shall be properly aligned, securely fixed and their cables routed safely to avoid mechanical damage.

6. Electrical Installation

The grid-connected inverter shall be installed at the designated location and connected to the PV array and AC grid connection as per the approved electrical drawings. DC and AC cables shall be properly sized, routed, supported and identified. The structure, module frames, inverter and other metallic parts shall be connected to the earthing system.

7. Testing & Commissioning

Before energization, the system shall be inspected and tested for polarity, continuity, insulation resistance, voltage, earthing and other applicable parameters. The inverter settings and protection systems shall be verified, followed by grid synchronization and commissioning of the system.

8. Safety

All work shall be carried out by competent personnel using appropriate PPE and approved safety procedures. Special precautions shall be taken for lifting operations, electrical work and work at height.

9. Handover

After successful commissioning, the installation shall be inspected and the site cleaned. Test reports, commissioning records, as-built drawings and relevant equipment documents shall be submitted for final approval and handover.