In the process of power compensation of the superconducting magnetic energy storage system (SMES) in the power grid, the existence of ac loss and eddy current loss will cause the magnet to heat up, and temperature rise is the main factor limiting the power output capability of SMES. This article proposes a state assessment method (SAM) that considers the temperature rise of the magnet. This method comprehensively considers the effects of the initial operating current (I0), initial temperature (T0), power response time (t), and output voltage (U) of the magnet on the temperature rise. Before SMES responds to the system power command, a magnet temperature estimation link is added to adjust the power command according to the magnet's possible temperature rise so as to ensure the magnet's safety. By simulating the operating conditions of 150 kJ/100 kW SMES in the microgrid, it is proved that the magnet's thermal stability is significantly improved after adding SAM, and the system operating parameters still meet the requirements within a particular response time. This method helps to maximize the power response potential of SMES under the premise of protecting the safety of the magnet.

中文翻译：

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考虑温升的储能磁铁状态评估方法研究

超导磁储能系统(SMES)在电网功率补偿过程中，交流损耗和涡流损耗的存在会导致磁铁发热，温升是限制功率输出能力的主要因素中小企业。本文提出了一种考虑磁铁温升的状态评估方法（SAM）。该方法综合考虑了磁体的初始工作电流（I0）、初始温度（T0）、功率响应时间（t）和输出电压（U）对温升的影响。在SMES响应系统功率指令之前，增加了磁体温度估算环节，根据磁体可能出现的温升来调整功率指令，以保证磁体的安全。通过模拟微电网中150 kJ/100 kW SMES的运行工况，证明加入SAM后磁体的热稳定性显着提高，系统运行参数在特定响应时间内仍满足要求。这种方法有助于在保护磁铁安全的前提下最大限度地发挥SMES的功率响应潜力。