Cases-GoLead Intelligent

A 1,000-MW-Class Pressurized Water Reactor Nuclear Power Plant

Overview

The generating units of this nuclear power plant adopt a unit-connected generator–main transformer configuration. Power is transmitted sequentially from the generator through the isolated-phase bus duct, generator circuit breaker, isolated-phase bus duct, and main transformer, and then delivered to the grid via a 500 kV GIS combined step-up substation.

The 500 kV GIS combined step-up substation adopts a one-and-a-half breaker scheme, and multiple synchronizing points are configured for each generating unit.

The generator synchronizing system of a nuclear power plant must achieve extremely high levels of reliability and availability to ensure reliable operation under both normal and accident conditions.

To enhance system reliability, the synchronizing control system is typically designed with multiple layers of redundancy, ensuring that even in the event of one or more system failures, the remaining redundant systems can continue to operate normally.

Pain Points & Solutions

Pain Point 1: Multiple Synchronizing Points

Under different operating modes, the generator may be required to synchronize and connect to the grid at different synchronizing points, requiring a single synchronizing device to support multiple synchronizing points.
Solution 1

A synchronizing point selector is used to switch among multiple synchronizing points, simplifying external wiring and system configuration.
Pain Point 2: Complex Operating Modes

Some synchronizing points may operate under slip-frequency conditions for synchronization, while others may require synchronization under equal-frequency conditions. In addition, the system must support closing under single-side no-voltage and double-side no-voltage conditions.
Solution 2

The automatic synchronizing device supports automatic identification of grid-connection conditions and self-determination of multiple closing modes.
Pain Point 3: Extremely High Reliability and Availability Requirements

The generator synchronizing system in a nuclear power plant must achieve extremely high levels of reliability and availability to ensure dependable operation under both normal and accident conditions.
Solution 3

The synchronizing control system adopts a multi-layer redundant design, ensuring continued normal operation of remaining redundant systems in the event of one or more system failures.

Values

Reliability

Redundant software and hardware designs ensure reliable operation of the synchronizing system under various extreme conditions.
Flexibility

Supports grid connection of generators under a wide range of operating conditions.
Safety

Enhances the safety of grid connection for nuclear power generating units.
Convenience

Significantly simplifies the synchronization and grid-connection operating procedures for nuclear power units.

Client Comments

The synchronizing system provided by Shenzhen GoLead Intelligent Electric Power Technology Co., Ltd., leveraging more than 30 years of experience in product development, manufacturing, and engineering design, delivers a highly reliable solution tailored to the practical operating requirements of nuclear power plants. The system is easy to commission, maintain, and operate, and has been running safely and fault-free for over 10 years since commissioning, demonstrating proven and trustworthy quality.

──────────── Project Manager, Anonymous Client

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