储能科学与技术 ›› 2022, Vol. 11 ›› Issue (12): 3883-3894.doi: 10.19799/j.cnki.2095-4239.2022.0158

• 储能系统与工程 • 上一篇    下一篇

基于飞轮储能的牵引变电所能量回收和电能质量综合治理系统的设计

李彦吉1(), 陈鹰2, 李祎杨3   

  1. 1.中国铁路北京局集团有限公司唐山供电段,河北 唐山 064000
    2.河北盾石磁能科技有限责任公司
    3.石家庄工程职业学院,河北 石家庄 050000
  • 收稿日期:2022-03-28 修回日期:2022-09-13 出版日期:2022-12-05 发布日期:2022-12-29
  • 通讯作者: 李彦吉 E-mail:hdliyanji@ aliyun.com
  • 作者简介:李彦吉(1974—),男,学士,高级工程师,研究方向为牵引变电所检修试验及运行管理,E-mail:hdliyanji@ aliyun.com
  • 基金资助:
    中国铁路北京局集团重大课题(2019AGD01)

Design of regenerative braking and power quality harnessed synthetically system in traction substation based on flywheel energy storage

Yanji LI1(), Ying CHEN2, Yiyang LI3   

  1. 1.Tangshan Section of China Railway Beijing Bureau Group Co. , Ltd. , Tangshan 064000, Hebei, China
    2.Hebei Dunshi Magnetic Energy Technology Co. , Ltd.
    3.Shijiazhuang Engineering Vocational College, Shijiazhuang 050000, Hebei, China
  • Received:2022-03-28 Revised:2022-09-13 Online:2022-12-05 Published:2022-12-29
  • Contact: Yanji LI E-mail:hdliyanji@ aliyun.com

摘要:

电气化铁路属于具有鲜明特点的大宗工业用户,如牵引负荷波动剧烈、负序电流较大、再生制动能量回馈电网等等。负序电流会造成局部金属件温升增高,甚至会导致变压器烧毁,还会使用电设备寿命缩短,加速设备部件更换频率,增加设备维护的成本。再生制动能量回馈电网会加剧两个供电臂负荷不平衡程度,使负序电流的影响更加严重,同时回馈到电网的能量部分不能被牵引供电系统所利用、造成能源的浪费。本工作研究了基于飞轮储能的牵引变电所能量回收和电能质量综合治理系统,在每个供电臂上安装变压器,飞轮储能装置通过变流器、变压器与馈线连接。飞轮储能系统可以有效降低两部制电价中基本电费的收取;同时飞轮储能装置作为储能体具备存储和释放电能的双重功能,可有效吸收再利用机车制动时产生的再生电能,减少电度电费支出;飞轮储能系统还可治理以负序为主的电能质量问题,较传统的电能质量治理方式产生了经济效益,解决了电能质量治理没有经济效益的难题。

关键词: 牵引变电所, 再生制动, 负序电流, 飞轮储能

Abstract:

The electrified railway is a large industrial user facility with distinctive characteristics. Here, the traction load fluctuates sharply, the negative sequence current is large, and the regenerative braking energy feeds back to the catenary. Hence, negative sequence current will increase the temperature of local metal parts, even leading to transformer burning, shortening the service life of electrical equipment, accelerating the frequency of equipment part replacement, and increasing the cost of equipment maintenance. Furthermore, regenerative braking energy feedback to the catenary will aggravate the load imbalance between the two power supply arms and make the impact of negative sequence currents more serious. However, the traction power supply system cannot use the energy feedback to the catenary. Therefore, the regenerative braking and power quality, which harnessed a synthetic system in traction substations based on flywheel energy storage, was studied. Transformers were first installed on two power supply arms, after which the flywheel energy storage device was connected with feeders through converters and transformers in the whole electrical circuit. Consequently, the system output AC27.5 kV transformed DC1600 V on the feeder to the flywheel energy storage device, causing the flywheel energy storage system to effectively reduce the basic tariff in dual tariff systems. As an energy storage body, the flywheel energy storage device also had the dual functions of storing and releasing electric energy, thereby effectively absorbing and reusing the regenerative electric energy generated during the braking of locomotives and reduction of power rates. In addition, the flywheel energy storage system solved the power quality problem in electrified railways' negative sequences. Thus, compared with the traditional power quality management method, it could produce economic benefits and solve the problem of no economic power quality management.

Key words: traction substation, regenerative braking, negative sequence current, flywheel energy storage

中图分类号: