规模化超导储能磁体概念设计及系统经济性评估  

Conceptual Design and Economic Evaluation of Large-Scale Superconducting Magnetic Energy Storage System

作　　者：陈孝元[1,2] 张名顺 庞洲 雷一 李海波 CHEN Xiaoyuan;ZHANG Mingshun;PANG Zhou;LEI Yi;LI Haibo(School of Engineering,Sichuan Normal University,Chengdu 610101,China;Sichuan Energy Internet Research Institute,Tsinghua University,Chengdu 610023,China)

机构地区：[1]四川师范大学工学院,成都610101 [2]清华四川能源互联网研究院,成都610023

出　　处：《南方电网技术》2022年第4期39-49,共11页Southern Power System Technology

基　　金：四川省科技计划(2022YFG0304,2020YFG0378);国家自然科学基金项目(51807128)。

摘　　要：在以新能源为主体的新型电力系统中,电力储能系统将会面临着能量交互次数越来越多、容量越来越大的迫切需求。建立了轴向气隙优化型超导储能磁体结构设计模型,初步形成了规模化超导储能概念设计方案。给定相同的10 km超导线长度,优化后的磁体储能量相比传统螺线管提高了约30%,有效降低了单位储能投资成本。考虑日均330次储能充放电需求的新能源应用场合,10.8 GJ/3 MWh规模化超导储能的瞬态峰值功率补偿能力相当于495 MWh电池储能系统,且超导储能运行10年后的总投资成本将会低于电池储能。因此,在能量交互日益频繁的新能源电力系统中,超导储能系统有望实现更低的储能容量及投资成本,缓解电池储能的过充/过放压力,延长电池储能的使用寿命,提高电力储能的整体经济效益。In the new power system with renewable energy as the main body,the electric energy storage system will face the urgent demand of more frequent energy interaction and larger capacities.The structural design model of axial gap optimized superconducting magnetic energy storage is established,and the concept design scheme of large-scale superconducting energy storage is formed.Compared with the traditional solenoidal magnet,the energy storage of the optimized magnet is improved by 30%,and the investment cost of unit energy storage is effectively reduced.Considering that the new energy applications demand of 330 times of energy storage charge and discharge per day,the equivalent battery storage capacity of 10.8 GJ/3 MWh scalable superconducting energy storage system reaches 495 MWh,and the total cost of superconducting energy storage will be lower than that of battery energy storage after 10 years of full-load operation.Therefore,the proposed superconducting energy storage system is expected to achieve lower energy storage capacity in the renewable energy based power system with frequent energy interaction demands.

关 键 词：超导储能 规模化超导磁体设计 超导-电池混合储能 经济性评估 

分 类 号：TM91[电气工程—电力电子与电力传动]