Solutions-GoLead Intelligent

Background and Challenges

As a critical resource for peak shaving, frequency regulation, and black-start capability in power systems, pumped storage power plants require frequent unit start-stop operations and rapid mode switching. This places extremely high demands on the automation level, control accuracy, and environmental adaptability of grid-connection control systems. The main challenges include:

Frequent Start-Stop Operations and Complex Mode Switching

Units must frequently switch between generation and pumping modes, requiring fast-response and highly adaptive control strategies.
High Synchronization Accuracy Requirements

Power grids impose extremely tight tolerances on frequency, phase angle, and voltage parameters during unit grid connection.
Stringent Black-Start Requirements

Power plants must be capable of independent grid connection, ensuring safe and reliable startup during emergency power supply conditions.

Overview

Leveraging over 80% market share in synchronization control and a synchronization accuracy of ≤ 0.5°, GoLead Intelligent delivers an integrated "full-operating-condition adaptive synchronization control" solution.

By combining phase sequence identification technology with a one-click sequential control strategy, the solution covers the entire lifecycle of pumped storage power plants—including grid connection, operating mode switching, and black-start operations—providing high reliability, high precision, and fully automated control performance.

Key Technologies

Multi-Mode Adaptive Algorithms

The solution incorporates embedded phase sequence identification logic to automatically distinguish between generation and pumping modes, intelligently switching and matching the optimal synchronization control strategy for each operating condition. By autonomously identifying operating states without manual intervention, the system significantly enhances intelligence and operational efficiency.
Full-Process Automated Control

With a one-click sequential control mechanism, the solution enables fully automated execution of grid connection, operating mode switching, synchronization, and disconnection processes. This approach eliminates delays and errors associated with traditional dispatch command execution, ensuring fast, accurate, and highly efficient system response.
Precision and Environmental Adaptability Assurance

The synchronization control achieves high precision, with frequency accuracy of ±0.01 Hz, phase angle accuracy of ±0.5°, and voltage accuracy of ±1%. Designed for harsh operating environments, the system supports a wide temperature range from –20°C to +55°C and operates reliably under high humidity levels up to 90%, making it well suited for complex site conditions such as mountainous terrain and moisture-intensive environments.
Localization and Standards Compatibility

The solution supports deployment on domestic operating systems and localized software and hardware platforms, meeting localization requirements and compliance standards for the nuclear and energy industries. With comprehensive communication interfaces compatible with Modbus, IEC 61850, and other standard protocols, the system enables seamless integration with power plant DCS systems, ensuring interoperability and long-term scalability.

Application Results and Cases

The solution has been successfully deployed across multiple pumped storage power plants, achieving 100% automation in operating condition recognition, significantly improving operational accuracy and grid-connection efficiency. During black-start operations, the first grid-connection success rate exceeded 99.9%, with markedly enhanced synchronization precision.

In addition, operation and maintenance efficiency increased by over 30%, greatly reducing reliance on manual intervention and lowering operational risks, thereby providing reliable support for the safe operation and intelligent upgrading of pumped storage power plants.

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