Substation
Leveraging its core strengths in smart phase-controlled circuit breakers and power transfer systems, GoLead Intelligent delivers an integrated power system solution featuring precise phase control, millisecond-level switching, and smart protection.
The solution is widely applicable to key substation scenarios, including capacitor bank switching, main transformer power source transfer, and transmission line fault isolation, ensuring safe, stable, and efficient substation operation.
The smart phase-controlled circuit breaker adopts voltage zero-crossing closing control to limit closing inrush current to no more than 2.0 times the rated current, and current zero-crossing opening control to significantly shorten arcing time, reducing contact wear and insulation stress. With high-precision phase-by-phase and time-sequenced operation, three-phase dispersion is controlled within 0.5 ms, enabling independent and optimized switching strategies under complex load conditions.
The high-speed power transfer device achieves a full-link switching time of no more than 20 ms on the 110 kV side (fault detection ≤5 ms, opening ≤5 ms, closing ≤10 ms), far outperforming conventional backup transfer schemes with response times around 500 ms. It supports multiple switching initiation criteria such as undervoltage, reverse power, and frequency abnormalities, improving decision accuracy and system robustness. Multiple control channels and waveform recording functions enable full visibility and traceability of the switching process.
The system is designed for reliable operation across a wide temperature range from −20 °C to +55 °C and features strong immunity to electromagnetic interference. It supports mainstream communication protocols including IEC 61850 and Modbus, allowing seamless integration with SCADA and dispatch automation systems. Built-in event recording, operation logging, and remote diagnostic capabilities enable intelligent, system-level operation and maintenance.
The solution has been successfully deployed in multiple backbone-grid substations and 220 kV/500 kV regional substations, delivering significant results. Inrush current during capacitor bank switching has been reduced by over 70%, effectively minimizing protection malfunctions and equipment stress. Main transformer power transfer response time has been shortened to within 20 ms, ensuring uninterrupted supply to critical loads.
Overall power quality within substations has been substantially improved, with annual fault-related tripping events reduced by more than 40%, providing reliable support for the stable, efficient, and smart operation of modern power grid substations.
