Nuclear Techniques ›› 2018, Vol. 41 ›› Issue (3): 30104-030104.doi: 10.11889/j.0253-3219.2018.hjs.41.030104

• SYNCHROTRON RADIATION TECHNOLOGY AND APPLICATIONS • Previous Articles     Next Articles

Compensating abrupt current for accelerator power supply

HUANG Shan1,2, TAN Songqing1, LI Rui1   

  1. 1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2017-11-13 Revised:2017-12-18 Online:2018-03-10 Published:2018-03-14
  • Supported by:
    Supported by the Research and Development Project of Proton Radiotherapy System based on Synchrotron (No.2016YFC0105402)

Abstract: [Background] Shanghai Synchrotron Radiation Facility (SSRF) is an advanced third-generation synchrotron radiation electron accelerator, it requires the magnetic field of long-term stability and high-accuracy. Hence the accelerator power supply is requested to keep the exciting current stable. [Purpose] This study aims to propose a dynamic current compensating method based on the load side of magnet to solve the problem of abrupt current caused by power grid voltage drop. [Methods] Band-pass filter was applied to the extraction of the abrupt current waveform, and the opposite polarity with the abrupt current was generated by real-time computation of the proportional integral (PI) controller. The compensator compensates the abrupt current by paralleling this opposite polarity current to inhibit the abrupt current at load side. [Results] Simulation and experiment results showed that the above-mentioned method has obvious effect for inhibition of abrupt current on load side. [Conclusion] The compensator is proved to be practical in restraining abrupt current.

Key words: Accelerator power supply, Abrupt current, Bandpass filtering, PI control

CLC Number: 

  • TL503