2000Nm³/h! CEEG's 96-Pulse (48-Pulse per Unit) Oil-Immersed Hydrogen Production Rectifier Transformer Debuts

Developed by CEEG for the Daan wind-solar green hydrogen to green ammonia integrated demonstration project of State Power Investment Corporation (SPIC) in Jilin — one of the world's largest projects of its kind — the ZHSFT series 96-pulse (48-pulse per unit) oil-immersed rectifier transformer for the 2000Nm3/h hydrogen production electrolyzer has officially rolled off the production line with distinction!

This is not only a dazzling chapter in CEEG's development history, but also another majestic milestone on the journey of hydrogen exploration! The CEEG ZHSFT series 96-pulse (48-pulse per unit) oil-immersed rectifier transformer for hydrogen production is another representative work of rapid technological iteration and upgrading, providing a new green and low-carbon guarantee for further advancing the large-scale development of the green power conversion industry and building an "ecological Daan."

1. Project Introduction

One of the world's largest green ammonia projects — the Jilin Daan Wind-Solar Green Hydrogen to Green Ammonia Integrated Demonstration Project (the "Daan project" for short), as the first project of its kind in China's new energy field, has carried the major mission of promoting energy structure transformation and green low-carbon development since its launch, and is an important innovative practice in China's hydrogen field.

The Daan project has achieved multiple outstanding technologies, spanning wind power, photovoltaic power generation, energy storage, hydrogen energy, green ammonia and other clean energy forms, forming a full electricity-hydrogen-ammonia industrial chain. It is not only the first project in China to commence construction integrating new energy hydrogen production and cryogenic air-separation nitrogen production for ammonia synthesis, but also a key link in Jilin Province's new energy industry map, exploring a new path for the sustainable development of the energy industry.

2. Product Highlights

Hydrogen is leaping into the spotlight of the global energy field with unstoppable momentum, leading the wave of the future energy revolution. In this grand project of green transformation, the rectifier transformer plays a key role: it efficiently conditions and converts unstable electric energy, providing stable and reliable power support for hydrogen production projects and cleverly linking electric energy and hydrogen.

For rectifier devices for large-scale 1000m3/h water electrolysis hydrogen production, there are currently two mainstream design schemes: the multi-pulse three-phase bridge thyristor rectifier system, and the three-phase bridge PWM rectifier plus DC/DC chopper system. Among them, the multi-pulse thyristor rectifier system can adapt to the parameter requirements of various electrolyzers, with mature and reliable technology, low investment cost and a small footprint, making it suitable for new energy hydrogen production scenarios with unstable power sources such as photovoltaic and wind power.

The 2000m3/h electrolyzer power supply developed for the SPIC green hydrogen to ammonia integrated demonstration project adopts a 96-pulse three-phase bridge thyristor rectifier system. Its core equipment is a 48-pulse-per-unit (96-pulse with two units operating in parallel) oil-immersed rectifier transformer for hydrogen production, equivalent to five transformers integrated into one, with high design and production difficulty. The R&D results can support multiple invention patent applications.

In terms of efficiency, it achieves efficient electric energy conversion, minimizing energy losses and improving energy utilization efficiency, which not only conforms to the concept of sustainable development but also brings users lower operating costs. In terms of safety, in every link of raw material procurement, supplier delivery, production control, inspection and testing, the product strictly follows lean production processes and quality management standards, ensuring safe production as well as stability and reliability during operation.

1. Phase-Shifting Structure

Combined phase-shifting structure on the grid side and valve side, with small phase-shift angle error

2. High-Temperature Insulation System

Reasonably selected insulation materials achieve equal-life design

3. Innovative Wide-Range Regulation + Rectifier-Transformer Integrated Structure

It can adapt to various grid-side and valve-side input and output requirements, meeting hydrogen production application scenarios with unstable wind and solar power sources

4. Modular Design

Compact structure and convenient operation modes: two units can be combined for 96-pulse operation, or a single unit can run at 48-pulse or 24-pulse

5. Intelligent Design

An integrated intelligent online monitoring and diagnosis system monitors the transformer's operating state in real time

3. CEEG Strength

CEEG's 34 years of R&D and manufacturing represent a deep accumulation of experience and technology. The birth of every new product is a brilliant result of long-cultivated strength and craftsmanship. On the broad stage of hydrogen, the energy of the future, CEEG has always maintained keen insight and tireless exploration.

Selected Hydrogen Projects

CEEG will continue to leverage its independent technology advantages, push forward key technology breakthroughs and application demonstrations for hydrogen production rectifier transformers, and make every effort to bridge the "last mile" from R&D to application of independent technology, promoting innovative and integrated development of the power and hydrogen production industries, supporting balanced development across the industrial chain, jointly building a new highland of green development, and opening a new chapter in the hydrogen field!