The design of the superconducting wiggler power supply system for HEPS-TF

Abstract

Purpose This paper describes the design of power supply system for superconducting wiggler in the project of high energy photon source-test facility. It includes three sets of high precision DC stabilized current power supplies for superconducting magnet excitation and three sets of quench protection assembly (QPA). A special magnetic load which has a very large time constant is studied in this paper. In this paper, a stable superconducting excitation power supply is developed, which can adjust the response quickly under the condition of very large load time constant. Meanwhile, the energy dissipation circuit of the QPA is integrated into the power supply in an active quenching protection mode to accelerate the energy release of the superconducting magnet and protect the superconducting magnet. Method The main circuit topology, control algorithm, quenching protection circuit and interlocking logic function are designed for the superconducting magnet with large inductance. The upper computer controls the switch of the three main power circuits through the serial port, sets the output current and adjusts the parameters according to the load. Conclusion Through a series of scientific and rigorous experiments, the rationality of superconducting wiggler magnet power supply scheme is demonstrated. The output current stability test and output voltage ripple test of the power supply meet or exceed the requirements of the magnet system.

Research on Intelligent Monitoring of Fire Safety and Fire Rescue Plan for Tunnel Operation under Quasi-Unattended Background

“…Du [12] put forward the overall idea of research in the view of the research status and shortcomings of the highway tunnel power supply systems at home and abroad. Wang [13] introduced the power supply design of the Guangzhou New International Airport Expressway, which focused on the new ideas of the power supply design and the new technologies used. Based on the study of more than 30 highway tunnel operation cases, Su et al [14] conducted research on highway tunnel operation risk modelling and tunnel operation real-time monitoring.…”