FGI SVG successfully put into operation the CGN San'ao Nuclear Power Project
2026-03-12
As a key project of my country's third-generation nuclear power technology, the CGN Zhejiang San'ao Nuclear Power Project is a crucial project in the national energy security system, bearing the important mission of promoting the localization of nuclear power technology and achieving green and low-carbon development. Unit 1 of the project adopts globally leading third-generation nuclear power technology, possessing significant characteristics such as high safety, superior economy, and environmental friendliness, and imposes extremely stringent requirements on the safety level, reliability, and stability of the supporting power equipment.
The SVG series dynamic reactive power compensation device, customized and developed by FGI for the project's 220kV substation, is operating stably. With its comprehensive power quality management capabilities, it has built a solid power barrier for the safe and stable operation of the unit throughout its entire life cycle, once again demonstrating the core strength of domestically produced power electronic equipment in the highest safety level scenario of nuclear power.
Power quality issues
Nuclear power, as a special power scenario with a high safety level, has stringent requirements for power supply stability and power quality with near-zero tolerance. Any power quality anomaly can affect the safe operation of the unit. The core challenges are concentrated in two dimensions:
1. Reactive power surges and voltage fluctuations directly affect the reliable operation of equipment.
The startup of numerous inductive loads in the system generates a significant reactive power surge, causing a sharp drop in the system power factor. Simultaneously, fluctuations in external grid voltage and dynamic changes in the unit's internal load can trigger bus voltage fluctuations and flicker. Furthermore, the unit's digital instrumentation and control systems, core measurement instruments, and other precision equipment have extremely high requirements for voltage stability. Voltage fluctuations exceeding permissible ranges can lead to distorted parameter acquisition, abnormal equipment operation, and even triggering safety protection shutdowns, affecting the precise control of reactor operating parameters.
2. Harmonic pollution hazards threaten the long-term safe operation of equipment.
Harmonic currents are continuously generated when various nonlinear electrical devices within the generating unit are in operation. After harmonics are injected into the power grid, they not only exacerbate the losses of equipment such as transformers and cables, accelerate the aging of insulation materials, and shorten the service life of equipment, but may also interfere with the normal operation of precision electronic equipment, posing a safety hazard for the long-term continuous operation of the generating unit.
FGI scheme
In response to the extremely demanding requirements of the San'ao Nuclear Power Project, FGI, leveraging its profound technological foundation as a national-level manufacturing single champion and combining over thirty years of engineering experience in the field of power electronics, customized a dedicated SVG series dynamic reactive power compensation solution for the project. Through three core advantages, it achieves comprehensive and highly reliable power quality management.
Millisecond-level dynamic response
The equipment possesses a wide range of reactive power regulation capabilities, enabling continuous and smooth adjustment of reactive power. It can quickly track dynamic changes in unit load and reactive power surges, compensating for inductive or capacitive reactive power in real time and maintaining the system power factor stably above 0.98. Simultaneously, through precise voltage closed-loop control, it rapidly suppresses voltage fluctuations and flicker, providing a stable power supply environment for precision equipment such as digital instrumentation and control systems and core measurement instruments, ensuring the accurate operation of nuclear safety-related equipment.
Integrated multi-dimensional governance
The device integrates multiple functions such as reactive power compensation, harmonic control, and flicker suppression. It can specifically filter out the characteristic harmonics generated by nonlinear loads in the unit, significantly reduce the harmonic distortion rate of the power grid, reduce additional equipment losses, delay insulation aging, and comprehensively protect the power quality of the power supply system, thus safeguarding the safe operation of the unit throughout its entire life cycle.
High reliability design
The product has been specifically optimized for high reliability and long-term operation, with redundant designs for key components to ensure that a single failure does not affect system operation. Simultaneously, the device has wide-temperature operating capabilities, maintaining stable output in ambient temperatures ranging from -40℃ to 50℃. Furthermore, the system is equipped with comprehensive monitoring and early warning functions, collecting equipment operating parameters in real time, supporting remote monitoring and fault diagnosis, and, in conjunction with FGI's professional operation and maintenance services, ensuring long-term stable operation of the device.
Application effect
After the SVG device was put into operation, power quality issues were completely resolved, and the safety and reliability of the power supply system were significantly improved. The system power factor was stably maintained above 0.98, the reactive power imbalance problem was completely eliminated, the voltage fluctuation amplitude was controlled better than the power supply requirements of precision equipment, and the power supply system losses were significantly reduced.
The successful application of FGISVG at CGN Zhejiang San'ao Nuclear Power Plant not only verifies the product's adaptability and superiority in scenarios with high safety and reliability requirements in nuclear power, but also provides a replicable industry benchmark solution for power quality management in third-generation nuclear power technology. In the future, FGI will continue to deepen its research and development of power equipment technology, providing even better power quality assurance solutions for the high-quality development of my country's nuclear power industry.
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