Stock Code: SH600522
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Marine System Solutions

ZTT provides comprehensive marine system solutions tailored for power transmission, communication networks, offshore oil & gas platforms, and offshore wind energy. With industry-leading technologies, robust engineering capabilities, and a strong track record in global deployments, we connect continents, energize industries, and enable a more sustainable and connected world beneath the waves.

Industry Overview

Offshore Wind Transmission Solutions

ZTT empowers offshore wind farms with comprehensive transmission systems for both inter-array and export power. We enable the reliable flow of renewable energy from sea to shore.

Industry Challenges

Rapid Technological Evolution

Offshore wind projects are moving toward higher capacities, deeper waters, and longer export distances. Cable systems must support higher voltages, larger conductors, and more complex installation conditions.

EPCI Capability and Schedule Pressure

Developers increasingly prefer suppliers with integrated Engineering, Procurement, Construction, and Installation capabilities. Tight project schedules and weather-dependent offshore operations intensify execution risks.

ESG and Environmental Compliance

Offshore wind projects are closely scrutinized for environmental impact, carbon footprint, and sustainability performance. Compliance with international ESG standards and transparent reporting has become a prerequisite for market access.

35/70 MPa Hydrogen Dispenser

Meet the SAE J2601 annotation protocol and obtain TUV certification
Automatic flow adjustment, remote status monitoring
Gas pressure protection, safety pressure relief, emergency cut off
Ultra large storage capacity
Flow range from 0.18kg/min to 7.2kg/min.

Diaphragm Compressor

Zero Pollution, Zero Leakage, High Compression Ratio Precision design, technical breakthrough High Pressure, Large Displacement, Low Energy Consumption.

Liquid-hydrogen Pump

Zero Pollution, Zero Leakage, High Compression Ratio Precision design, technical breakthrough High Pressure, Large Displacement, Low Energy Consumption.

Sequence control panel/cabinet

Three-Stage Refueling, High-Efficiency Gas Extraction, Independent Operation Full Automatic, User-Friendly Lightweight, Compact, Modularized.

Gas Unloading Pole

Two systems, one in use and one in reserve Intelligent control, safe and reliable Emergency pull-off, explosion-proof and leak-proof
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Our Solution

A total solution encompassing 33kV/66kV Inter-array cables and 220kV/500kV Export cables, along with specialized accessories.

66kV/132kV Wet-Design Inter-array Cable

A lead-free, lightweight cable designed to connect wind turbines. It significantly reduces weight and costs while maintaining high electrical performance in “wet” environments.

220kV/500kV HVDC/HVAC Export Cable

High-capacity transmission lines designed to deliver bulk power from offshore substations to the mainland grid, featuring robust armoring for long-distance reliability.

Value Contained

Enhanced ROI

Optimized cable layouts and high-voltage ratings (up to 500kV) reduce electrical losses, increasing the overall return on investment for wind farms.

Future-Ready Scalability

Supports the next generation of 15MW+ mega-turbines with advanced 66kV/132kV inter-array solutions.

Sustainable Infrastructure

Directly enables the large-scale integration of clean energy into the mainland grid, supporting global carbon neutrality goals.

Successful Cases

China - Yangjiang Sanshan Island ±500kV Project

End User: China Southern Power Grid
Contract Period: Apr. 2025 – Ongoing
Cable Type: HVDC ±500 kV
Transmission Capacity: 2.043 GW
Length: 116.5 km

China - Yangjiang Fanshi II 500 kV EPCI Project

End User: CGN
Contract Period: Mar. 2025 – Sep. 2025
Cable Type: HVAC 500 kV, 3*800mm2
Transmission Capacity: 1000 MW
Length: 92 km

China - Honghai Bay VI 500 kV Project

End User: Shenzhen Energy
Contract Period: Jun. 2025 – Ongoing
Cable Type: HVAC 500 kV
Transmission Capacity: 500 MW
Length: 94 km

Poland - Baltica 2 Project

End User: Ørsted A/S and PGE Poland JV
Contract Period: 2023 – 2026
Cable Type: HVAC 275 kV
Wind Farm Capacity: 1.5 GW in total, 375 MW per circuit
Total Cable Length: 158 km

Germany - OST-6-1 EPCI Project

End User: 50Hertz Offshore GmbH
Contract Period: 2023 – 2027
Cable Type: HVAC 220 kV
Transmission Capacity: 900 MW
Cable Length: 80.5 km

Successful Cases

China - Yangjiang Sanshan Island ±500kV Project

End User: China Southern Power Grid
Contract Period: Apr. 2025 – Ongoing
Cable Type: HVDC ±500 kV
Transmission Capacity: 2.043 GW
Length: 116.5 km

China - Yangjiang Fanshi II 500 kV EPCI Project

End User: CGN
Contract Period: Mar. 2025 – Sep. 2025
Cable Type: HVAC 500 kV, 3*800mm2
Transmission Capacity: 1000 MW
Length: 92 km

China - Honghai Bay VI 500 kV Project

End User: Shenzhen Energy
Contract Period: Jun. 2025 – Ongoing
Cable Type: HVAC 500 kV
Transmission Capacity: 500 MW
Length: 94 km

Poland - Baltica 2 Project

End User: Ørsted A/S and PGE Poland JV
Contract Period: 2023 – 2026
Cable Type: HVAC 275 kV
Wind Farm Capacity: 1.5 GW in total, 375 MW per circuit
Total Cable Length: 158 km

Germany - OST-6-1 EPCI Project

End User: 50Hertz Offshore GmbH
Contract Period: 2023 – 2027
Cable Type: HVAC 220 kV
Transmission Capacity: 900 MW
Cable Length: 80.5 km

Connecting the World
Powering the Future

Products

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Contact

Electricity Division: power.sales@zttgroup.com
Telecommunications Division:sales@zttgroup.com
New Energy Division: ZTTRE@zttgroup.com
Submarine Cable & System Division:zttsc@zttgroup.com
+86 513 8010 0986
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