Grid Integration & Electrical Infrastructure

Connecting renewable energy systems to existing electrical networks requires careful engineering. Technical Solutions designs and implements the electrical infrastructure needed to safely and reliably integrate solar PV, battery storage, and hybrid systems into grid-connected or isolated power networks.

Grid Connection

Grid-tied renewable energy systems must comply with utility requirements for power quality, protection, and control. Technical Solutions provides:

• Grid connection studies — power flow, fault level, and harmonic impact analysis
• Interconnection design — point of common coupling specification, metering, and protection schemes
• Grid code compliance — ensuring systems meet local utility requirements for voltage, frequency, power factor, and fault ride-through
• Anti-islanding protection — preventing energisation of grid sections during maintenance
• Power quality verification — confirming that injected power meets harmonic and flicker limits

Protection Systems

Renewable energy installations require comprehensive electrical protection:

• Overcurrent and earth fault protection — protecting cables, equipment, and personnel
• Differential protection — for transformers and generator connections
• Surge protection — lightning and switching surge arresters for PV arrays and electrical infrastructure
• Arc fault detection — for DC-side fire prevention in PV string wiring
• Protection coordination — ensuring that faults are cleared by the correct device without unnecessary system tripping

MV and LV Integration

Technical Solutions designs and installs both medium-voltage (MV) and low-voltage (LV) electrical infrastructure:

Medium Voltage (MV)

• Step-up transformers for utility-scale PV plants
• MV switchgear panels (ring main units, circuit breakers)
• MV cable systems and terminations
• MV protection relay configuration and testing

Low Voltage (LV)

• LV distribution boards and switchgear
• Cable sizing and routing for PV and storage systems
• Power factor correction equipment
• Energy metering and monitoring

Switchgear and Substation Interfaces

For larger installations, Technical Solutions provides:

• Substation design and equipment specification
• Switchgear procurement, installation, and commissioning
• Relay protection programming and testing
• SCADA integration for remote monitoring and control
• Earthing system design and installation

Compliance Considerations

All electrical infrastructure is designed and installed in compliance with:

• IEC 60364 — Low-voltage electrical installations
• IEC 61439 — LV switchgear assemblies
• IEC 62271 — HV/MV switchgear
• IEC 60076 — Power transformers
• Local utility grid codes and connection requirements

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