Wellington North Solar Farm

Overview

The Wellington North Solar Farm is a 425 MWdc solar project in New South Wales generating enough clean electricity to power 152,500 homes annually, while significantly reducing carbon emissions. As part of its advanced high-voltage infrastructure, Insulect supplied a range of key components including 36kV and 330kV Disconnectors, a 330kV Dead Tank Circuit Breaker, Point on Wave Relay for DTCB control, 330kV Capacitive Voltage Transformers, Power Quality Sensors to suit CVTs, 330kV and 33kV Station Post Insulators, and 330kV Overhead Disc Insulators, ensuring safe, reliable, and efficient grid connection and performance.

Challenge

At 330kV, the stakes are high. The Wellington North Solar Farm required a grid connection that could handle large-scale power generation while maintaining strict standards for safety, stability, and power quality.

The challenge wasn’t just about supplying individual components. It was about ensuring that every element of the high-voltage system worked seamlessly together. From switching and protection to measurement and insulation, each piece needed to perform flawlessly under varying load conditions and environmental stresses.

Additionally, the integration of advanced control systems, such as point-on-wave switching, was essential to minimise electrical stress and extend equipment life, adding another layer of technical complexity.

Solution

Insulect delivered an end-to-end high-voltage solution tailored to the project’s demanding requirements. This included 330kV and 36kV disconnectors for safe isolation, a 330kV dead tank circuit breaker for reliable switching and fault protection, and a point-on-wave relay to precisely control breaker operations.

To support accurate measurement and monitoring, Insulect supplied 330kV capacitive voltage transformers (CVTs) along with power quality sensors, ensuring visibility and control over the system’s performance.

Complementing these were robust insulation solutions, including station post insulators and overhead disc insulators, designed to withstand environmental conditions while maintaining system integrity.

Together, these components formed a cohesive, high-performance electrical infrastructure—engineered for reliability, safety, and long-term operation.

Benefits

With Insulect’s integrated solution, the Wellington North Solar Farm benefits from a highly reliable and controllable high-voltage network. The inclusion of advanced switching technology, such as point-on-wave control, reduces electrical stress on equipment—enhancing longevity and minimising maintenance requirements.

Accurate voltage measurement and power quality monitoring enable operators to optimise performance and maintain compliance with grid standards. Meanwhile, robust insulation and switching equipment ensure safe operation, even under demanding conditions.

The result is a system that not only performs efficiently but is built to support the project’s long-term operational goals.

Results

Today, the Wellington North Solar Farm is delivering large-scale renewable energy into the grid, helping to power communities while reducing carbon emissions across New South Wales.

Behind this achievement is a high-voltage network operating with precision and reliability, enabled by Insulect’s comprehensive supply of critical components.

In a project where scale, complexity, and performance intersect, Insulect’s contribution ensures that clean energy is not only generated, but delivered safely, efficiently, and consistently for years to come.