Rectifier and Power Converters for Industrial Applications -Friem Việt Nam

Rectifier and Power Converters 

With more than 60 years experience FRIEM is World Leader in the design and manufacturing of Special Rectifiers and Power Converters. Reliability, availability and efficiency are granted by our dedicated solutions for the power section and for the control. Moreover we can test the Rectifiers up to more than 50kA and the Power Converters up to 1 MVA in our Test Rooms. FRIEM is capable of supplying air, water and deionized water cooled Rectifiers and Converters giving the customera complete Conversion System tailored on his application and complying with IEC or ANSI/IEEE Standards.

Advantages and Protection Features Reliability and Availability

• N+1 Semiconductors redundancy: standard

• Cooling System redundancy: standard

• Control System self-diagnostic: standard

Efficiency Short Delivery and Start-Up Time

• Proprietary Internal Busbar design with reduced losses

• Simplified design of Transformer-Rectifier Connection

• Optimised design for phases and thyristors balancing

Short Delivery and Start-Up Time

• Reduced delivery time thanks to Modular design

• Reduced installation and commissioning time

• Fast Start-up and operation turning with the dedicated Digital Regulator

Safety

• Latest IEC and ANSI/IEEE Standards

• FRIEM design protection devices

Protection Features

• O/C, O/V, U/V, Phase Sequence Protection

• Overcurrent and Short circuit protection at the Rectifier Input

• Semiconductor Protection and Alarm devices • (N+1) or (N+2) Semiconductor redundancy

• Automatic Protection against Output Circuit Opening

• Supervision and control of current sharing between Electrolysis Cell Lines in parallel

• DC Earth Fault protection

• Arc Flash Protection

• Free Wheeling System

• Full Temperature monitoring and Thermal protection

• Thyristors/Fuses temperature monitor

• Cooling Circuit monitoring (Pressure, Flow Rate, Conductivity)

Design and Manufacturing Power Section

• Exclusive Aluminium extruded Busbars

• High efficiency and high dynamic stress withstand

• High reliability and long life operation due to reduced operating temperatures

• Optimised Nr. of Semiconductors and N+1 Valves redundancy as standard

• Non-Magnetic material Rectifier Cubicle • Simplified design of Transformer’s Phases Connections

• Optimised Design for Thyristors balancing • Easy maintenance

Cooling Section

• Deionised to raw water Cooling System (dWFWF)

• Deionised water to forced air Cooling System (dWFAF)

• Monitoring of temperature, under pressure, min flow, min and max level, high conductivity of deionised water

• 50% or 100% redundancy

•Open or enclosed section 

• Easy maintenance

Control Section

• Digital regulation (FRIEM DRP) for Diodes, Thyristor and IGBT

• PLC and OP control and automation (different brands available)

• Hot and warm PLC redundancy

• Fiber Optics Thyristors and Control connection

• Redundant DC Current measure

• All PLC brands available

• Local, Remote and Master control

• Remote control via Modem/Internet

DRP Digital Regulation

• 15kHz Sampling Frequency

• High accuracy regulation of current, voltage and power

• Reading and recording of all main measurements and events

• Current and Voltage Oscillographic recording and Load Profile

• Easy and fast setting of the Regulation and Protection Parameters

• Reduced commissioning and start-up time

Operating characteristics

 Connection Full Wave: Bridge - Double Bridge (Series or Parallel) Half Wave: Double Star - 2x Double Star DC/DC Converters: Step-Down - Step-up Type Diode, Thyristor, IGBT DC Output Current More than 160kA in only one Rectifier Cubicle DC Output Voltage Rectifier: up to 1500V DC/DC Converter: up to 3000V Up to 15,000V for special applications Cooling Air, Water, Deionized Water Modular Design Flexible solutions Control ±0,5% standard accuracy Digital Current Regulation Current, Voltage and Power Installation Indoor - Outdoor (containerised solution available)