铁轨重力储能系统效率影响因素研究

doi:10.19799/j.cnki.2095-4239.2022.0634

储能科学与技术 ›› 2023, Vol. 12 ›› Issue (3): 835-845.doi: 10.19799/j.cnki.2095-4239.2022.0634

铁轨重力储能系统效率影响因素研究

秦婷婷¹^,²(), 周学志¹^,²^,³, 郭丁彰¹^,², 盛勇¹, 徐玉杰¹^,², 左志涛¹^,²^,³, 李辉¹^,²^,³, 陈海生¹^,²^,³()

^1.中国科学院工程热物理研究所，北京 100190
^2.中国科学院大学，北京 100049
^3.毕节高新技术产业开发区国家能源大规模物理储能技术研发中心，贵州毕节 551712

收稿日期:2022-10-31 修回日期:2022-11-14 出版日期:2023-03-05 发布日期:2023-04-14
通讯作者: 陈海生 E-mail:qintingting@iet.cn;chen_hs@iet.cn
作者简介:秦婷婷（1996—），女，硕士研究生，研究方向为铁轨重力储能总体设计及并网控制，E-mail：qintingting@iet.cn；
基金资助:
大规模储能技术研发与示范国际合作计划(182211KYSB20170029);黔科合支撑［2020］（2Y064）;黔科合基础［2020］（1Y240）

Study on factors influencing rail gravity energy storage system efficiency

Tingting QIN¹^,²(), Xuezhi ZHOU¹^,²^,³, Dingzhang GUO¹^,², Yong SHENG¹, Yujie XU¹^,², Zhitao ZUO¹^,²^,³, Hui LI¹^,²^,³, Haisheng CHEN¹^,²^,³()

^1.Institute of Engineering Thermophysics, Chinese Academy of Science, Beijing 100190, China
^2.University of Chinese Academy of Science, Beijing 100049, China
^3.National Energy Large Scale Physical Energy Storage Technologies R&D Center of Bijie High-tech Industrial Development Zone, Bijie 551712, Guizhou, China.

Received:2022-10-31 Revised:2022-11-14 Online:2023-03-05 Published:2023-04-14
Contact: Haisheng CHEN E-mail:qintingting@iet.cn;chen_hs@iet.cn

摘要/Abstract

摘要：

储能是建设以新能源为主体的新型电力系统的重要支撑技术，对实现“碳达峰碳中和”目标具有重要意义。铁轨重力储能属于物理储能，具有规模大、成本低、效率高、环境友好以及无自放电等优势，应用前景广阔。本工作基于MATLAB/Simulink搭建了铁轨重力储能系统模型，分析了系统各个部件在储能过程和释能过程中的能量损耗情况，研究了载重车辆质量、车辆速度、斜坡坡度、斜坡高度和滚动摩擦系数等因素对系统效率的影响及其变化规律。研究结果表明，车辆速度、斜坡坡度、斜坡高度和滚动摩擦系数对系统效率的影响十分显著，降低速度和滚动摩擦系数以及适当增加坡度和高度，可有效提高系统效率；在设计工况下，载重车辆160 t、车速20 km/h、斜坡高度200 m、斜坡坡度7°、滚动摩擦系数0.006，对应系统的输出功率为1.04 MW，系统效率达76.20%。

关键词: 储能技术, 物理储能, 重力储能, 铁轨重力储能

Abstract:

Energy storage is an important supporting technology for constructing a new power system with new energy as the main body, which is of great significance to achieving the goal of carbon peak and carbon neutrality. Rail gravity energy storage belongs to physical energy storage, which has the advantages of large scale, low cost, high efficiency, eco-friendly, and no self-discharge, resulting in broad application prospects. In this study, a rail gravity energy storage system model was built based on MATLAB/Simulink, and the energy loss of each component of the system in the energy storage and energy release processes were analyzed. The influence of factors such as the mass of the vehicle, the speed of the vehicle, the inclination of the slope, the height of the slope, and the rolling friction coefficient on the system efficiency and their variation rules were studied. These factors significantly reduce the speed and rolling friction coefficient, and increase the slope and height appropriately, resulting in an efficient system. Under these design conditions, the load vehicle of 160 t the speed of 20 km/h, the slope of 200 m, the slope of 7°, and the rolling friction coefficient of 0.006 was achieved. The corresponding system output power and efficiency are 1.04 MW and 76.20%, respectively.

Key words: energy storage technology, physical energy storage, gravity energy storage, rail gravity energy storage

中图分类号:

TK 02

秦婷婷, 周学志, 郭丁彰, 盛勇, 徐玉杰, 左志涛, 李辉, 陈海生. 铁轨重力储能系统效率影响因素研究[J]. 储能科学与技术, 2023, 12(3): 835-845.

Tingting QIN, Xuezhi ZHOU, Dingzhang GUO, Yong SHENG, Yujie XU, Zhitao ZUO, Hui LI, Haisheng CHEN. Study on factors influencing rail gravity energy storage system efficiency[J]. Energy Storage Science and Technology, 2023, 12(3): 835-845.

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部件	参数	数值	部件	参数	数值
载重车辆	满载质量/t	160	永磁同步电机	直交电感/mH	0.3e-3
	上坡速度/(km/h)	20		交轴电感/mH	0.3e-3
	下坡速度/(km/h)	20		转动惯量/(kg·m²)	35000
	轮轨滚动摩擦系数	0.006		额定转矩/(N·m)	173586
	静摩擦系数	0.408		额定转速/(rad/s)	5.82
	车轮直径/m	1.05		定子电阻/Ω	0.006
	主减速器变比	0.55		转子磁链/Wb	1.48
	迎风面积/m²	3		电机效率	0.96
	传动效率	0.96	双向PWM型变换器	变流器效率	0.97
山体斜坡	高度/m	200		额定容量/MVA	1.5
山体斜坡	坡度/(°)	7		直流侧电压/V	1150

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铁轨重力储能系统效率影响因素研究

Study on factors influencing rail gravity energy storage system efficiency

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