Nuclear
Background and Challenges
Nuclear Power Plants
  • Power Supply Continuity
    Critical loads such as main coolant pumps and emergency core cooling systems demand uninterrupted power supply. Any power outage may lead to severe consequences, thus ensuring continuous and stable power delivery is paramount.
  • Environmental Adaptability
    Equipment must operate reliably under long-term exposure to harsh environments including high temperature, high humidity, and radiation. This necessitates outstanding environmental resistance and long-term anti-aging performance.
  • System Redundancy
    To comply with nuclear safety regulations, power systems must incorporate multi-layered redundancy. This ensures that even in the event of partial system failure, other subsystems can continue functioning normally to maintain operational safety.
Overview

Leveraging our market-leading positionwith over 98% market share in synchronization products within the nuclear powersector, along with our industry-leading technology in fast transfer switchingdevices, we provide an integrated solution combining: Precision Synchronization, Seamless Power Transfer(Zero-Interruption Switching), Intelligent Inrush Current Suppression.

This comprehensive solution is tailoredto critical nuclear scenarios, including: Primary pump power supply within thenuclear island, Generator synchronization in theconventional island, Emergency power source transfer andswitching.

Our solution ensures Zero-interruption power continuity, Minimal electrical impact duringswitching, Stable operation throughout the entireequipment lifecycle.

All while meeting the strictrequirements of nuclear safety regulations for electrical systems.

Key Technologies
  • Millisecond-Level Seamless Power Transfer

    Upon main power failure, the transfer logic initiates within 5 ms. Coordinated with high-speed vacuum circuit breakers, the end-to-end transfer time is ≤ 20 ms, ensuring uninterrupted supply to critical loads.

    Guarantees uninterrupted operation of essential systems such as reactor cooling pumps and emergency boron injection pumps during source transfer, preventing core meltdown and radioactive leakage risks.

  • Smart Inrush Current and Overvoltage Suppression

    Utilizes the “residual and bias magnetic flux counteraction” method to suppress magnetizing inrush currents and switching overvoltages from transformers and capacitor banks, preventing misoperation of protection systems.

    Optimizes circuit breaker closing timing, reduces arc re-ignition risk, and safeguards sensitive nuclear island equipment, thereby prolonging service life.

  • Environmental Adaptability and Intelligent Monitoring

    Designed to withstand high temperature, high humidity, and radiation exposure, ensuring long-term stable operation in harsh nuclear power environments.

    Enables remote monitoring and intelligent diagnostics, providing real-time visibility into equipment status and improving operation & maintenance efficiency.

Application Results and Cases

In a large nuclear power plant, our solution has demonstrated the following results:


Enhanced Power System Stability

Continuous power supply to critical loads reached 100%, eliminating equipment downtime caused by power source transfers.


Extended Equipment Lifespan

Through inrush current suppression and overvoltage protection, equipment failure rates were reduced by 30%,significantly extending service life.


Improved O&M Efficiency

Intelligent monitoring and diagnostic functions reduced the frequency of manual inspections, markedly improving operation and maintenance efficiency.

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