The ITER reactive power compensation and harmonic filtering (RPC &amp;amp; HF) system: Stability &amp;amp; performance

Mankani, Ashok; Benfatto, I.; Tao, Jun; Goff, J.; Hourtoule, J.; Gascon, J. C.; Cardoso-Rodrigues, D.; Gadeau, B.

doi:10.1109/sofe.2011.6052341

Cited by 24 publications

(5 citation statements)

References 1 publication

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“…The main design parameters of ITER power supply system described in [1][2][3] were considered in this study. From those, a Simplified Power Supply System (SPSS) (Fig.…”

Section: Simplified Power Supply Systemmentioning

confidence: 99%

“…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.…”

Section: Introductionmentioning

confidence: 99%

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

Finotti

Gaio

Song

et al. 2015

Fusion Engineering and Design

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“…The main design parameters of ITER power supply system described in [1][2][3] were considered in this study. From those, a Simplified Power Supply System (SPSS) (Fig.…”

Section: Simplified Power Supply Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Finotti

Gaio

Song

et al. 2015

Fusion Engineering and Design

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“…1) [4], [5]. The acldc conversion systems are equally distributed among three independent 66 kV and 22 kV distribution systems supplied by three identical three winding step-down transformers (nominal power 300/250/150 MVA and voltage 400/66/22 kV, % impedance at 300 MV A xps%=12%, xpt%=27%, xst%=15%, where the subscripts indicate the windings: primary, secondary and tertiary).…”

Section: Reference Design Of the Iter Power S Uppl Y Systemmentioning

confidence: 99%

“…One topic recently studied is related to the investigation of possible instabilities due to the concurrent operation of the acldc conversion and Q compensation and filtering systems [5]. It is not an easy task: the overall system is very complex, the numerical simulation of its operation via programs capable of reproducing the instantaneous current and voltage profiles requires a very long calculation time and most of all it does not provide any sensitivity data concerning the stability of the whole power system.…”

mentioning

confidence: 99%

Analytical model for stability analysis in high power ac/dc converters applied to the ITER case

Finotti

Gaio

Benfatto

et al. 2012

2012 IEEE 15th International Conference on Harmonics and Quality of Power

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The ITER experiment is an international project that aims to prove the viability of energy production by a nuclear fusion reactor. The fusion reactions are achieved by heating a plasma up to million of Celsius degree and confining it by means of appropriate magnetic fields, which interact with the charged particles of the plasma. In ITER the magnetic fields will be produced by the currents flowing in the superconducting coils supplied by ac/dc converters based on thyristor technology. The ITER power supply system may consume a total active and reactive power respectively up to 500 MW and 950 Mvar; a Static Var Compensation system with nominal power of 750 Mvar based on Thyristor Controlled Reactor + Tuned Filter (as fixed capacitor) was selected to reduce the reactive power demand from the grid.In this paper an analytical approach has been considered to study the interactions between the ITER power supply system and the grid, taking the starting points from the methods developed for the HVDC applications, which is a large scale thyristor based converter system usually installed with reactive power compensation equipment. This model aims to evaluate the strength of the electrical network feeding the ITER power supply system by sensitivity analysis allowing the calculation of some index as the Critical Short Circuit Ratio and the Voltage Sensitivity Factor.

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“…Due to the inherent characteristic of thyristor phase-controlled converters, a huge amount of reactive power [5] is required by the PF converter system during normal operation, especially at the flap top phase of plasma current because of the high current and low voltage output in this period. To solve this problem, a set of static var compensator (STATCOM) [6] rated for 750 MVA is installed at the 66 kV busbar to provide the required reactive power to the grid. Sequential control [7−10] of the multi-series converters is also an effective method to improve the natural power factor of ITER PF converters thus to alleviate the pressure of reactive power demand from the grid.…”

Section: Introductionmentioning

confidence: 99%

On the Sequential Control of ITER Poloidal Field Converters for Reactive Power Reduction

Yuan

Gao

et al. 2014

Plasma Sci. Technol.

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Sequential control applied to the International Thermonuclear Experimental Reactor (ITER) poloidal field converter system for the purpose of reactive power reduction is the subject of this investigation. Due to the inherent characteristics of thyristor-based phase-controlled converter, the poloidal field converter system consumes a huge amount of reactive power from the grid, which subsequently results in a voltage drop at the 66 kV busbar if no measure is taken. The installation of a static var compensator rated for 750 MVar at the 66 kV busbar is an essential way to compensate reactive power to the grid, which is the most effective measure to solve the problem. However, sequential control of the multi-series converters provides an additional method to improve the natural power factor and thus alleviate the pressure of reactive power demand of the converter system without any additional cost. In the present paper, by comparing with the symmetrical control technique, the advantage of sequential control in reactive power consumption is highlighted. Simulation results based on SIMULINK are found in agreement with the theoretical analysis.

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The ITER reactive power compensation and harmonic filtering (RPC & HF) system: Stability & performance

Cited by 24 publications

References 1 publication

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

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

Analytical model for stability analysis in high power ac/dc converters applied to the ITER case

On the Sequential Control of ITER Poloidal Field Converters for Reactive Power Reduction

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