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Flexible DC Transmission Enables More Reliable grid Integration of Clean Energy and Large-scale Long-distance Power Transmission

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Flexible DC Transmission Technology Solutions

TBEA’s flexible DC transmission technology products offer precise control, rapid response, high efficiency, and reliability. We provide tailored solutions for scenarios such as large-scale long-distance renewable energy transmission, offshore wind power integration, and regional grid interconnection, effectively overcoming challenges associated with conventional DC technology.As a leader in the industry, we supplied core equipment for the world’s first and most advanced UHV flexible DC project—the China Southern Power Grid Wudongde UHV multi-terminal DC demonstration project.
  • UHV flexible DC transmission
  • UHV flexible DC transmission converter valve
  • Onshore flexible DC transmission system solution
  • Offshore wind power flexible DC transmission system solution
UHV flexible DC transmission

UHV flexible DC transmission

Compared to conventional DC transmission technology, UHV flexible DC offers greater advantages in long-distance, high-capacity power transmission. It demonstrates broad development prospects, particularly in renewable energy integration.Its converter valves feature high modularity, flexible scalability, high operational efficiency, and independent active/reactive power control, with no risk of commutation failure. These characteristics make it the preferred choice for large-scale renewable energy grid integration, efficient long-distance transmission, and energy consumption worldwide. It is also a new high-voltage DC technology actively promoted in China.
UHV flexible DC transmission converter valve

UHV flexible DC transmission converter valve

Under ultra-high voltage, strong current, and ultra-high-energy electromagnetic interference environments, UHV flexible DC transmission converter valves feature breakthroughs in submodule design and manufacturing, DC fault isolation, high-performance valve control technology, fault-tolerant operation without blocking for single-component failures, and full-function equivalent testing under all operating conditions. These advancements overcomes the development bottlenecks of multi-DC-fed grids and accommodate more DC power.
Onshore flexible DC transmission system solution

Onshore flexible DC transmission system solution

With the large-scale development of onshore renewable energy bases, flexible DC power transmission has become a new trend for long-distance electricity delivery.TBEA has introduced the ±800 kV flexible DC converter valve. Based on the “DC fault ride-through control without blocking” technology, the solution is designed for high reliability and low cost, achieving a full-bridge low ratio and low loss. It is suitable for various onshore application scenarios, providing an economical and efficient solution for renewable energy transmission.
Offshore wind power flexible DC transmission system solution

Offshore wind power flexible DC transmission system solution

Based on the ±800 kV UHV flexible DC transmission technology, the design features a lightweight and compact solution for offshore wind power converter stations. It optimizes the reduction of module capacitance, quantity, and losses, while proposing a new topology to enhance power density.The system utilizes a proprietary modular centralized energy discharge device for offshore wind power. This ensures that faults in the onshore AC system do not affect the offshore wind power system, guaranteeing overall safe and reliable operation.

Solution Value

System Safety

With multiple bypass protection designs and full-link control redundancy, the system ensures no black module trips under any circumstances, significantly improving grid safety and stability while guaranteeing continuous power supply, providing reliable power transmission for the grid.

Grid-Friendly

Equipped with precise voltage and current control capabilities, it perfectly adapts to weak grid applications with high proportions of renewable energy integration.Through fine-tuned regulation, it can balance power fluctuations in the grid, providing strong support for the integration and accommodation of renewable energy.

Efficient Operation

The overall loss of the converter valve is below 0.6%, significantly improving the system’s economic efficiency.Low losses not only reduce energy waste but also lower operational costs, offering robust support for the long-term stable operation of the power system.

High Reliability

Utilizing quasi-high-end board design and verification, it ensures zero-failure operation in extreme electromagnetic compatibility environments, enabling stable performance in harsh conditions and providing a solid foundation for the reliability and stability of the power system.

Superb Controllability

The valve control link delay is industry-leading. Its self-developed virtual impedance strategy effectively suppresses wideband oscillation risks and adjusts transmission parameters in real time, ensuring the stability and safety of the power system.

Smart O&M

Equipped with intelligent online monitoring and expert system diagnosis functions, it achieves unmanned monitoring and intelligent, convenient operation and maintenance.Thanks to real-time detection of equipment operating status, it can promptly identify and address potential faults to improve operation efficiency and safety.

Applications

Urban Power Supply

We utilize existing lines to increase power supply capacity and balance power flow.

Island Power Supply

Low cost, high adaptability, and passive inversion.

Small-Scale Power Generation

Increased efficiency, grid feedback, and renewable energy generation.

AC Transmission Conversion

This increases transmission capacity and enhances network stability in the vicinity.

Power supply for drilling platforms

Environmental protection, and power transmission between platforms.

Multi-terminal DC power supply

Capacity expansion, high independence, and strong robustness.

Asynchronous interconnection

Connecting asynchronous grids with fully controlled power.

Related Products

Application Cases

TBEA Wudongde Power Transmission Guangdong Guangxi Ultra High Voltage Multi terminal DC Demonstration Project.
TBEA Wudongde Power Transmission Guangdong Guangxi Ultra High Voltage Multi terminal DC Demonstration Project.
TBEA provided high-voltage shunt capacitor devices for the Zhalute-Qingzhou ±800 kV DC transmission project.
TBEA provided high-voltage shunt capacitor devices for the Zhalute-Qingzhou ±800 kV DC transmission project.

TBEA, Empowering a Better World.

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