Multifunctional Superconducting Magnetic Energy Compensation for the Traction Power System of High-Speed Maglevs

Abstract

With the global trend of carbon reduction, high-speed maglevs are going to use a large percentage of the electricity generated from renewable energy. However, the fluctuating characteristics of renewable energy can cause voltage disturbance in the traction power system, but high-speed maglevs have high requirements for power quality. This paper presents a novel scheme of a high-speed maglev power system using superconducting magnetic energy storage (SMES) and distributed renewable energy. It aims to solve the voltage sag caused by renewable energy and achieve smooth power interaction between the traction power system and maglevs. The working principle of the SMES power compensation system for topology and the control strategy were analyzed. A maglev train traction power supply model was established, and the results show that SMES effectively alleviated voltage sag, responded rapidly to the power demand during maglev acceleration and braking, and maintained voltage stability. In our case study of a 10 MW high-speed maglev traction power system, the SMES system could output/absorb power to compensate for sudden changes within 10 ms, stabilizing the DC bus voltage with fluctuations of less than 0.8%. Overall, the novel SMES power compensation system is expected to become a promising solution for high-speed maglevs to overcome the power quality issues from renewable energy.

Analysis of Energy Efficiency Opportunities for a Public Transportation Maintenance Facility—A Case Study

“…To this effect, maglev trains would rely on renewable electricity. In [22], a novel superconducting magnetic energy storage (SMES) system in conjunction with distributed renewable energy sources was explored. Using distributed renewable energy sources, clean electricity can be provided to power these trains without heavily relying on the grid, while the SMES system actively responds to the power demand of maglev trains during acceleration and braking conditions by rapidly releasing and absorbing energy.…”

The Regulation of Superconducting Magnetic Energy Storages with a Neural-Tuned Fractional Order PID Controller Based on Brain Emotional Learning

“…SMES stores energy as a magnetic field, as compared to conventional battery-based storage devices, which minimizes losses during bidirectional power transfer. SMES is also advantageous for applications that need rapid power correction because of its quick response times and long operating lives [4]. Numerous investigations have focused on the utilization of SMES 2 of 18 in diverse situations related to power systems.…”