Hydrogen

Dynex has a rich history in producing multimegawatt power conversion solutions. Our power converter technology is a perfect fit for power supplies needed for hydrogen electrolysis applications.

Power Converters

Dynex is uniquely able to design power converters with its own tailored semiconductors, as well as benefiting from expert knowledge of wear out mechanisms and capability outside of the common operation.

Dynex power converter technology is ideally suited for the power supplies needed for hydrogen electrolysis, whether that may be from a renewable source such as solar, wind and wave power, or simply grid connected. Using the latest IGBT AFE (Active Front End) technology our supplies are optimised in terms of efficiency, size, power factor correction and harmonic distortion.

With a wealth of experience in designing power converters our team of application engineers are able to match and refine a power supply to meet the customers needs, whether that be DC ripple requirements, space limitations or differing incoming supply voltages.

All of our power supplies feature a Dynex designed controller that makes it easy to interface the electrolyser control system with our power supply. This gives constant status feedback to ensure the smooth and efficient running.

With the production of hydrogen, safety is paramount, this is why our power supplies feature an MCCB on the input side that has a trip that can be customer controlled to instantly cut power in the case of an emergency shutdown.

500kW IGBT active front end-based power supply

Power Supplies for Hydrogen

Active Front End IGBT rectifiers for high efficiency, unity power factor and low harmonic DC supply
Turn key solution with built in MCCB, precharge and contactors
Controlled over Profinet (other methods available)
Voltage or current or power control
Ripple to customers specification
Additional Buck converters to achieve output voltages <650V
Customisation available
Power rating from 100kW up to 2MW
Liquid cooling or forced air cooling
Multiple outputs to provide power to numerous stacks

Thyristor and Diode Rectifiers

High Power SCR and Diode rectifiers designed for Hydrogen Electrolysis
High power rectifier systems for demanding applications
Tailored design with redundancy and maintainability built in
Assembly design to withstand corrosive environment
Designed with complimentary crowbars and anti-spike filters
Proven design with 15 years operation in high humidity and other harsh environments

- Power Supply for Hydrogen Electrolysis Frequently Asked Questions

Why are high power electronics essential in hydrogen electrolysis?

Power electronics play a pivotal role in green hydrogen electrolysis by ensuring efficient energy conversion, precise control, and reliable operation. These features are crucial for scaling up hydrogen production and integrating it with renewable energy sources, making it a key component in the transition to a sustainable energy future.

The overall aim is to control and optimise the energy conversion processes needed to produce hydrogen efficiently by converting AC from the grid or renewable sources (like solar or wind) into the DC required by electrolysers with minimal energy loss.

They need to minimise system downtime, maximise system efficiency and maximise the ROI for investors.

What are the benefits of Active Front End Rectifiers in hydrogen electrolysis?

Active Front End (AFE) rectifiers play a crucial role in enhancing the performance and efficiency of hydrogen electrolysis systems by providing better power quality, voltage control, and energy efficiency. These benefits are particularly important in the context of scaling up hydrogen production for industrial and renewable energy applications.

- AFE rectifiers help in reducing harmonics and improving the power factor, which is crucial for maintaining the quality and efficiency of the power supply.

- Support bidirectional power flow, allowing energy to be fed back into the grid if necessary, enhancing energy efficiency.

- Minimize energy losses compared to passive rectifiers, leading to more efficient hydrogen production.

An AFE rectifier converts alternating current (AC) to direct current (DC) with a high degree of control. Unlike traditional rectifiers, which are passive and typically use diodes, AFE rectifiers use controlled switches like insulated-gate bipolar transistors (IGBTs) to actively manage the power conversion process

Are thyristor-based rectifiers a viable option for hydrogen electrolysis?

In hydrogen electrolysis, the choice of rectifier technology is important because the process requires a stable and efficient DC power supply.

Thyristor-based rectifiers are a viable option for hydrogen electrolysis, particularly in large-scale industrial settings where robustness, reliability, and cost-effectiveness are key considerations. Thyristor-based rectifiers are also favoured for their ability to handle high power levels.

They may require supplementary systems to manage power quality and integrate effectively with renewable energy sources. Despite this challenge, they remain a popular choice in many hydrogen production facilities due to their proven track record and economic advantages.