INDOOR SWITCHGEAR

Medium Voltage Vacuum Switchgear of various types for Indoor and Outdoor applications for voltage ratings upto 36kV and Gas insulated Switchgears upto 420kV

On Load Tap Changers (OLTC)

• For Power Transformer, Furnace Transformer, Station Transformer, Rectifier Transformer etc
• On Load Tap Changer For up to 400 KV class Transformer
• Circuit Tap Switch For up to 400 KV class Transformer

CONTROL AND RELAY PANELS

CONROL EQUIPMENT

Control Eqipment Engineering (CEE) is a unique engineering division catering to the control equipment requirements of various fields and applications since the early 1970s.

Areas of Expertise:

• Traction Electrics
• Oil Rigs Electrics
• Digital AVR, Static excitation equipment and High curretn rectifiers
• Defence controls
• Monitoring Systems
• Variable Frequency Drives

CEE has been pioneer in establishing the latest technology in controls for Regenerative system for WAG7, Diesel and Electric LOCOs, EMU(Electric Multiple unit), DEMU(Diesel Electric Multiple unit), Oil Rigs, Micro controller/DSP based Traction drives using power devices GTO/IGBT/IPM, transformer monitoring and control systems & Hydro and thermal power plant equipment.

Traction Controls business has been one of the primary area of expertise, with most of the conventional Diesel locomotives of Inidan Railways running on BHEL Technology. We have a very strong presence in electrics of conventional AC_EMUs, DEMUs, Diesel Electric Locomotives, & other conventional technologies. With the advent of electrification drive from Govt. of India, the Deisel Electric Tower Car requirement from Indian Railways has increased manifold in recent years and BHEL has supplied over 200 sets in past 3 years to support the cause. We are the first manufacturers to introduce Metro System in India back in 1983 at Kolkata and upgraded it again in 2000s to keep up with the latest technology. With a dedicated Research & Product development team, we are constantly evolving and unpgrading the technology to keep up with the current technical treands.

The basis of our core strength lies in the technical-engineering capabilities which are:

• System Design/Integration
• Power Electronics
• Electronics Hardware / Embedded Systems
• Software

Power Electronics Converters design capabilities:

• Traction Grade IGBT Based Inverter, Chopper, Battery Charger Modules With Intelligent Gate Interface Cards
• Industrial Grade IGBT. GTO, Thyristor, Diode Based Power Electronics Stacks For Varied Applications
• In-house Gate Circuit And Driver Interface Design Capabilities

Electronics Hardware / Embedded Systems capabilities:

• In-house Designed Electronics And PCB For Traction & Industrial Applications
• IEC 60571 compliant
• DSP + FPGA + Arm Based Electronics Controller Design
• Analog Circuits For Sensor/Field Interfacing
• Type Testing As Per Relevant IEC Standards For Traction

Software Capabilities:

• Developed And Established State Of The Art Software Algorithms
  • Field Oriented Closed Loop Vector Control Of Induction Motors
  • Sensor-less Speed And Flux Estimation Of Induction Motor
  • Space Vector PWM And Other Modulation Techniques.
  • Synchronous Reference Frame Based Power Factor Correction
• Digital Communication
  • IEC-61850 SCADA
  • MODBUS
  • ETHERNET
  • TCP/IP
  • PROFIBUS
  • CAN
  • I2C
• Expertize In Programming FPGA, DSP, ARM-LPC Processors, HMI Design, Plc- ladder Logic

Design Experience

• Design, Development & Engineering of control equipments & Power Electronics converters since 1970s
• Continuous technical upgradation to keep up with market trends
• Dedicated research & product development group
• Design expertize in Power Electronics, Control Electronics, Embedded System design, EMI/EMC compliant designs and Software development.

Traction Electrics:

AC-EMUs

• Electrics for DC drive based AC-EMU/MEMU
• BHEL is the only source to supply ACEMU electrics for Indian Railways
• EMU is formed in 1MC+2TC combination for 9car and 12 car formation Maximum declared speed of train is 90KMPH.
• Controls is based on the voltage control of the DC series motors.
• Approx 2000 numbers supplied
• 25kV AC OHE, 668kW/ Motor coach

Conventional DEMU

• Complete Control Electrics(Motor Switch Group, Control Panels, Driver desk, Power Rectifiers)
• 350 HP to 1400 HP
• More than 500 Sets

1600 HP 3-phase DEMU Electrics Development:

• Complete design and manufacturing, currently under testing
• IGBT based 650kVA Traction Converter with Heat-pipe based cooling system.
• 1800VDC input, 1400V variable AC output
• 110kVA Auxiliary Converter with battery charger
• 1800VDC input, Outputs: 415 V AC, 50Hz, 40kVA ; 110-120 V DC, 295A ; 110 V DC , 30A
• Vehicle control Unit and control Cubicle
• Rectifier and Driver’s desk

Diesel Electric Locomotive:

• Complete Control Electrics(Control Panels, Control Gear items, DBR, Power Rectifier & E-Type Controls)
• 700 HP to 3300 HP
• More than 2000 Sets.

Diesel Electric Tower Car:

• Complete Control Electrics(Motor Switch Group, Control Panels, Driver desk, Power Rectifiers)
• 700 HP On Board/2X340 Under Slung
• More than 300 Sets

WAG-7 Electric Locomotive:

• WAG7 locos were first introduced in 1992
• Rating is 5000 HP
• 6 numbers DC Series motor with parallel operation
• BA1, BA2,BA3 and AC2 panels being supplied by BHEL Bhopal
• More than 100 sets supplied

WAG-7 Upgradation – Regenerative System

• First of its kind which provides regeneration in DC motor driven loco.
• Introduced in 2019 with complete in house effort from concept to stack design and software
• Regenerative braking from Speed 100KPH to 15 KPH and then Air brake.
• Regenerative Braking is achieved through IGBT based Front End converter for feeding power at unity PF, Boost Chopper and Buck chopper
• IGBT based 2.5MW water cooled Converter Panel with Heat Exchanger System