ITER Coil Power Supply and Distribution System

Analysis and Test of a Zero-Flux Current Sensor to Be Used in ITER

“…Equation (2) indicates that, the measured current is determined once the current i k of each secondary winding is known. At the actual working condition of a CT, the secondary windings are controlled independently to reach the zero flux condition in the air gaps.…”

“…And a correspondingly complex power system will also be needed to provide controlled DC currents to the superconducting magnets for plasma operation [2]. Acting a significant role in plasma performance, these DC currents have to be measured very accurately.…”

“…Acting a significant role in plasma performance, these DC currents have to be measured very accurately. The current transducer (CT) researched and developed in ASIPP, which will be used in the Poloidal Field Converters of ITER [2], is required to measure a steady DC current up to 30 kA with a precision better than 0.5 % of the measured current. Contributed by the high-capacity power system at hundreds of megawatt level and large plasma current at million ampere level, the magnetic field at ITER complex is extremely strong [3].…”

Improvement of the dynamic response of the ITER Reactive Power Compensation system

“…The reactive power consumption (Q) is very high compared to the threshold value of 200 Mvar permitted by the French Transmission System Operator (TSO), therefore several methods were considered to improve the power factor, based both on Q reduction and compensation techniques. As for the first, sequential control was selected for the ac/dc converters, while for the compensation approach, the adopted solution includes Reactive Power Compensators (RPC) based on Static Var Compensation technology with a nominal power of 250 Mvar for each 66 kV busbar and based on Thyristor Controlled Reactor (TCR) + Tuned Filters (as fixed capacitor) [1,2]. A first version of the RPC control was developed with the goal to produce a reactive power equal to that consumed by the ac/dc converters.…”

Transient Magnetic Field Analysis of PF Converter Unit

“…The magnet system of ITER consists several superconducting coils [2,3] powered by a complex coil power supply and distribution system [4]. And Poloidal Field (PF) coil power supply system is a key part of it and used to power the PF coils which generate the PF scenario and control the plasma shape and position [5].…”