Project Overview

In the blue sea area 34 kilometers from the coast of Yuhuan in Taizhou, Zhejiang, a modern offshore wind farm is setting sail against the wind. The Yuhuan No. 2 offshore wind power project, an "offshore giant" with an installed capacity of 500,000 kilowatts, can deliver about 1.5 billion kWh of clean electricity to the power grid every year, equivalent to saving 450,000 tons of standard coal and reducing carbon dioxide emissions by 1.2 million tons, becoming an important force in China's eastern coastal energy transformation.

As the core support of the project, the offshore booster station adopts the intelligent operation mode of "unattended" and the onshore metering station implements "manned duty". Under such special geographical environment and technical requirements, a stable and reliable power supply system has become a key part of the success or failure of the project. With 30 years of power technology precipitation, Huiyeda successfully won the bid for the project's 220V control and protection DC power supply system, -48V communication DC power supply system and UPS power supply equipment, injecting strong power into this "offshore energy fortress".

Facing the Deep Blue: Technical Challenges in Special Environments

The harsh offshore environment puts forward extremely high requirements for the reliability and anti-corrosion performance of the equipment. the offshore booster station 34 kilometers away faces extreme conditions such as humidity, heavy salt spray, and strong winds and waves; The onshore metering station is also located in the near-beach flat area, and the environmental challenges are self-evident.

The project requires that the equipment shell, connecting parts, and exposed metal parts must be treated with special anti-corrosion treatment to ensure safe and reliable operation for more than 25 years. At the same time, the offshore booster station equipment needs to withstand the tilt and vibration caused by wind and waves and tides during transportation and operation. The device must meet the following requirements:

1) Sports environment with 20 degrees of horizontal swing and 10 degrees of vertical swing

2) The tilt angle during normal operation does not exceed 0.35%, and under extreme working conditions, it does not exceed 0.5%

3) The protection level reaches C4 anti-corrosion level

4) Dustproof and waterproof requirements ranging from IP31 to IP42 for screen cabinets

Huiyeda solution: the hard core strength of AC and DC power supply systems

1) High frequency and high efficiency, dense power

2) Module redundancy online maintenance

3) Panoramic visibility and intelligent alarm

4) Global parameters, remote controllable

5) Open protocol for seamless access

6) All automatic maintenance to extend the life

7) Plug and play, easy to maintain

Huiye Da's all-round power supply solutions

In the face of challenges, Huifec has created a comprehensive power solution tailored for the project:

01220V control protection DC system: safe and stable "power heart"

(1) The offshore booster station is equipped with 2 sets of 400Ah imported colloidal batteries, and the onshore metering station is equipped with 2 sets of 700Ah and 1 set of 200Ah batteries

(2) High-frequency switching technology is adopted, with a voltage regulation accuracy of ≤± 0.5% and a ripple coefficient of ≤0.5%

(3) The intelligent monitoring system realizes the "four remotes" function to remotely monitor the status of each battery

(4) Top imported gel batteries such as German Hobeck and American Haizhi ensure 15 years service life

02-48V communication DC system: "power guarantee" for high-speed information

(1) Two independent 380V AC inputs, automatic switching, to ensure uninterrupted communication

(2) The 30A high-frequency switch module with N+1 redundancy design has perfect lightning protection

(3) Intelligent battery management system to monitor battery status in real time

(4) Meet the strict requirements of communication equipment for power supply, and provide stable support for fan monitoring and data transmission

03UPS Power System: The "Power Guardian" for Seamless Switching

(1) 20kVA (offshore) and 30kVA (onshore) power frequency UPS

(2) 0ms switching between AC power supply and DC power supply

(3) The static switching time < 4ms to ensure uninterrupted power supply for key equipment

(4) The accident lighting UPS ensures 3-hour emergency power supply to meet the fire certification requirements

Ingenious details: the promise of ultra-long life

In terms of detail processing, Huiye Da showed a professional level:

(1) The screen cabinet is sprayed with 316 stainless steel plate, which has passed the salt spray test of more than 1000 hours

(2) The cabinet is equipped with a temperature and humidity controller to adapt to the characteristics of large temperature difference between day and night and high humidity in the marine environment

(3) Enhanced anti-corrosion paint is used, and third-party test reports are provided

(4) The cabinet is equipped with necessary fixing devices to ensure that the equipment is safe and stable during transportation

(5) Strict seismic design to meet complex sea conditions such as roll + rise and sinking, pitch roll - rise and sink

Digital Empowerment: The O&M Revolution of Intelligent Monitoring

Huiyetec's solution is not only hardware delivery, but also the construction of a digital operation and maintenance system:

lIntegrated intelligent monitoring and management unit to realize comprehensive monitoring of DC system, UPS power supply and communication power supply

lMicro type insulation monitoring device, which can automatically detect the insulation resistance of each branch to the ground and prevent AC channeling

Protect the blue with ingenuity and go to a zero-carbon future with innovation

From the stormy waves 34 kilometers away to the precise scheduling of onshore metering stations, Huiyeda's full-stack power supply system has built a solid power foundation for this maritime green energy fortress with "zero fault and high reliability". This is not only a technical delivery, but also a milestone for domestic high-end power equipment to achieve independent and controllable in extreme marine environments.

As a national brand that has been deeply involved in the power field for 30 years, Huiyeda has always taken "providing reliable and intelligent customized power system solutions for global customers" as its mission. With every accurate voltage output and stable power protection every second, we practice the concept of "escorting electricity, safe and far-reaching". In the future, Huiye Da will continue to focus on cutting-edge fields such as new energy, energy storage, and smart grid, empower the national "dual carbon" strategy with innovative technologies, and work with industry partners to draw a magnificent blueprint for a zero-carbon future.