Solutions-GoLead Intelligent

Background and Challenges

With the continuous expansion of photovoltaic installed capacity, issues such as high penetration of inverter-based generation, auxiliary power system switching, and voltage stability have become core challenges in operation and management. The main challenges include:

High-Precision Synchronization Requirements for Synchronous Condensers

In photovoltaic power plants, synchronous condensers must be precisely synchronized with the grid to balance active and reactive power and improve power quality.
Uninterrupted Power Supply for Auxiliary Systems

Auxiliary loads within PV plants require extremely high power supply continuity, necessitating millisecond-level transfer response under abnormal conditions.
High Penetration of Inverter-Based Resources

This can easily trigger grid resonance, voltage fluctuations, and frequency drift, requiring the power system to have strong suppression and coordination capabilities.

Overview

Leveraging our core technological strengths in synchronization control and fast transfer solutions, GoLead Intelligent delivers an integrated solution featuring precise grid connection of synchronous condensers and seamless auxiliary power transfer for key photovoltaic power system scenarios.

The solution is widely applicable to centralized photovoltaic power plants, synchronous condenser coordination systems, and PV–energy storage hybrid stations, and fully complies with the requirements of GB/T 19964-2012 Technical Requirements for Connecting Photovoltaic Power Plants to Power Systems as well as relevant IEC standards for stability and safety.

Key Technologies

Synchronous Condenser Grid-Connection Control

Automatic synchronization accuracy of ≤ ±0.5° phase angle deviation, enabling millisecond-level synchronization with the main grid, effectively avoiding closing impact caused by frequency mismatch or phase deviation and achieving a first-closing success rate exceeding 99.9%.
Fast Auxiliary Power Transfer

By coordinating fast transfer devices with high-speed vacuum circuit breakers, the system achieves a complete transfer time of ≤ 20 ms (detection ≤ 5 ms + operation ≤ 15 ms), effectively preventing inverter disconnection triggered by voltage sags.
Energy Storage Integration Compatibility

Supports coordinated operation strategies among inverters, synchronous condensers, and energy storage systems, ensuring continuous and stable power supply for plant auxiliary systems under grid disturbances or islanded operating conditions.
Smart Monitoring Capabilities

The system integrates telemetry, waveform recording, and smart diagnostics, supporting remote fault analysis and parameter optimization, thereby reducing operation and maintenance costs.

Application Results and Cases

The solution has been successfully deployed across multiple national-level large-scale photovoltaic bases, achieving a reduction of over 40% in grid-connection inrush current, a 100% successful transfer rate under abnormal operating conditions, and an average annual reduction of 30% in auxiliary power system failure rates. These results provide strong technical support for the stable operation, improved economic performance, and enhanced renewable energy integration capability of photovoltaic power plants.

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