Engineering (Advanced Engineering)

Data acquisition and control system objective is to facilitate integrated operation and control of tokamak and other scientific projects. Assist scientists by providing tools and technique to carry out research experiments planning, operation & control, data archiving and post experiment analysis with ease.

Software framework for interfacing of heterogeneous distributed tokamak plant systems in order to monitor and orchestrate them for tokamak readiness.

Web Monitoring

Development of web application server for online monitoring of integrated tokamak plant systems from anywhere in the campus at anytime.

Embedded System for Plasma Control

Embedded system for distributed control of tokamak plant system based on VME hardware and  real time operating system vxWorks with real time data communication network - Reflective Memory for plasma parameters controls such as position, shape, density and heating.

Design and development of VME based time synchronization and event distribution hardware and software for plasma pulse execution. The measured event transmission latency between two farthest nodes of distance 150 meters is 4 microseconds. The timing pulse resolution is 1 microseconds for all the channels.

Plasma diagnostic data acquisition system with sampling rates of 10MHz, 1MHz and 100 KHz based on PXIe/PXI and VME platform. Automation of data archiving and backup.

24 X 7 availability of Centralized data storage system for SST-1. The system is based on Storage Area Network (SAN) technology with multi-tier architecture to achieve low latency for frequently accessed data.

Software for Diagnostic data analysis using Matlab and open source alternative Python

Plasma experiment data are converted into MDS+ tree automatically and are made available for visualization on browser using WSGI technology

Development of SCADA system for Large Cryogenics Plant Control System (LCPC) ) based on open source software framework Experimental Physics and Industrial Control System (EPICS) and Control System Studio (CSS) for various projects

Ethernet based PTZ cameras for SST-1 machine monitoring. An optimized video recording is setup based on motion detection. An AI based security system to detect human is already in place. An another application is being developed for the video summarization using machine learning technique.

Recent Developments: Hardware In loop for simulation of plasma control model

Hardware-in-loop (HIL) system is widely used for designing the Control Systems.

Requisite hardware has recently been procured and commissioned with SST-1 Operations Division for design of Plasma control System (PCS) which would involve various subsystems providing the real-time control of plasma position, shape and density in a close loop.

IPR Electrical Power Distribution System  comprises of 132 kV Substation supplied by a dedicated line from Grid Operator, Uttar Gujarat Vij Company Limited from their Ranasan Substation which is 6 kms away. The 132 kV substation  has five step down transformers which bring down the 132 kV supply to 11 kV / 22 kV. All the transformers are of different ratings,  ranging from 15 MVA to 37.5 MVA . Three of the transformers are used for experimental loads of ADITYA-U, SST-1 and ITER India Laboratories and Two transformers are used for Utilities. Automatic Power factor compensation system is installed at 11 kV to help correct the excess reactive power generated by inductive loads in the electrical distribution network. With an efficient use of this device, the electrical network can improve efficiency by reducing losses and reduced apparent power demand charges. The Emergency Power distribution System caters electrical power demand from various systems viz. Cooling Water System, Cryogenic and other important safety and investment protection systems. It comprises of 2 x 1.7 MVA Diesel Generator.

The 11kV distribution has six 11kV buses to cater various electrical loads while 22kV has two buses to suffice various requirement for ITER India Project’s load.

ADITYA/ADITYA-U Tokamak  is operated with high current DC power supplies based on the combination of power transformers, line commutated 12 pulse converters, wave shaping circuitry and associated control systems. The subsystem is named as ADITYA/ADITYA-U Pulsed Power System (APPS).

DC Power System: 50 kA Toroidal Field Power Supply, ±20 kA Ohmic  Power Supply, 28 kV rated Wave shaper and 12.5 kA Vertical Field Power Supply

Feedback Power Supply (FFPS): 0.25 kV, ±2 kA (Indigenously procured) & Booster Power Supply :2.5 KV (Indigenously Procured)

TF PS  is a 10 kA and 20 V SCR base Converter Power Supply. It is being operated at 10 kA for 3T and 5 kA for 1.5T for SST-1 operations scenarios

APC PS is a 12 kA and 133 V IGBT Based Switched power Supply. It is operational for bipolar current of +/- 6 kA, +/-2 kA during SST-1 operations being used for horizontal plasma control.

PF PS (13 power Supplies) : All the power supplies have a voltage range between 26V to 120 V and current range of 10/20 kA.

     

The PF and TF power supplies are scattered from utility building to magnet protection hall (MPH) hall to current lead system. All power supplies use direct current circuit breaker (DCCB) and pyro fuse for protection . In case of any fault DCCB opens and dump resistor is connected in the circuit. Stored magnetic energy of  magnet coil is discharged through dump resistor. In case DCCB fails then pyro fuse acts as secondary or backup protection. The dump resistor is connected in the circuit and stored magnetic energy of coil is discharged. Direct current transducer (DCCT) is used for precision measurement. DCCT gives ±10V for ±10 kA current. DCCT provides feedback to the hybrid controller and VME DAC system for realtime storage. Isolator cum earth switch connects and disconnects coil from power supply. The operating parameters of  the power supplies are provided using graphical user interface (GUI) software to versa module eurocard (VME) data acquisition and control (DAC) system connected to the power supply.

IGBT inverter power circuit	Fast response bipolar power supplies are being developed for Divertor coil of Aditya tokamak and PF6 coil in SST-1 with rating of 5 kA bipolar, 500 VDC and a fast response of minimum 1 MA/s.Initial results are promising. The analog controllerhas been developed in-house.
Step bipolar response > 1 MA/s	IGBT inverter control and protection circuit

In the first phase of experiments for SSST there are three power supplies viz.(a) Equilibrium Filed Power Supply (EFPS) (b) Toroidal Filed Power Supply (TFPS), and (c) Ohmic Transformer Power Supply (OTPS). The conceptual design, simulation and analysis for all these three power supplies have been completed successfully. The Prototype power supply for Ohmic Transformer System has been developed and tested successfully. The development of prototype power supply for Toroidal Filed Coil is in progress and in fabrication stage. Apart form the prototypes, the actual power supplies for SSST are in the procurement and manufacturing stages in the development ladder.