Coordinated Control Method of Photovoltaic and Battery System Connected to Traction Power Supply System Based on Railway Power Conditioner
-
摘要:
为将光伏发电接入牵引供电系统进行有效利用，同时兼顾牵引供电系统电能质量改善及列车再生制动能量回收利用，提出了一种基于铁路功率调节器的光储系统接入牵引供电系统的协调控制方法. 首先，搭建基于铁路功率调节器的光储系统接入牵引供电拓扑结构，并对其电能质量补偿机理进行理论分析；在此基础上，充分考虑光储系统的运行条件以及列车牵引、制动、空载或惰行工况，提出光储系统接入牵引供电的联合协调控制方法，实现了“光 + 储 + 荷”三者间的协调控制、牵引供电系统负序的动态补偿以及谐波的有效抑制；在RT-Lab实时仿真系统中建立了基于铁路功率调节器的光伏接入牵引供电系统仿真模型，并结合实际光照和牵引工况数据验证本文所提出的系统结构以及协调控制方法的有效性. 结果表明：本文所提出的系统结构以及协调控制方法能够实现牵引供电系统中光储系统的有效接入，再生制动能量回收率提升至86.7%，功率因数提升 6.4%，对谐波特别是高次谐波含有率有较大改善，满足光伏电能高效消纳及综合利用、电能质量动态综合补偿、再生制动能量回收多重需求.
Abstract:To connect the photovoltaic (PV) power generation to the traction power supply system for effective utilization and take into account the improvement of the power quality of the traction power supply system and the recycling of the regenerative braking energy of the train, a coordinated control method based on railway power conditioner (RPC) was proposed to connect the PV and battery system to the traction power supply system. Firstly, the PV and battery system based on RPC was connected to the traction power supply topology, and its power quality compensation mechanism was analyzed theoretically. On this basis, a combined coordinated control method for the PV and battery system connected to the traction power supply was proposed by taking full account of the operating conditions of the PV and battery system and the working conditions of traction, braking, no load, or idling. As a result, the coordinated control of “PV + battery + load”, the dynamic compensation of negative sequence, and the effective suppression of harmonics in the traction power supply system were realized. To verify the validity of the proposed system structure and the coordinated control method, the simulation model of the PV and battery system connected to the traction power supply system based on RPC was established in the RT-Lab real-time simulation system, in combination with the actual illumination and the data of traction conditions. The results show that the proposed system structure and coordinated control method can realize the effective access of the PV and battery system in the traction power supply system. The regenerative braking energy recovery rate is increased to 86.7%, and the power factor is increased by 6.4%. There is a big improvement in the current ratio of harmonics, especially high harmonics. Therefore, the proposed method can meet the demands of efficient PV power dissipation and comprehensive utilization, dynamic and comprehensive compensation of power quality, and regenerative braking energy recovery.
-
图 1 基于RPC的牵引供电系统综合补偿结构图
Figure 1. Comprehensive compensation structure of traction power supply system based on RPC
图 4 光储荷系统功率控制流程图
Figure 4. Flow chart of power control for “PV + battery + load” system
图 5 补偿前、后三相侧电流变化
Figure 5. Three-phase side current changes before and after compensation
图 9 光储 + RPC接入前负序电流
Figure 9. Negative sequence current before PV and battery + RPC access
图 10 光储 + RPC接入后2种光照下的负序电流
Figure 10. Negative sequence current under two kinds of illumination after PV and battery + RPC access
图 11 光储 + RPC接入前后谐波电流含有率变化
Figure 11. Changes in current ratio of each harmonic before and after PV and battery + RPC access
表 1 仿真模型主要参数
Table 1. Main parameters of simulation model
子系统 参数 数值 牵引变压器 变比 220/27.5 降压变压器 变比 27.5/1 变流器 直流侧电压/V 4000 RPC 直流电容/F 0.02 RPC 交流电感/H 0.0001 光伏装机 容量/MW 3.265 蓄电池 容量/MW 6 
下载: 导出CSV
表 2 各次谐波电流含有率
Table 2. Current ratio of each harmonic
谐波次数/次 含有率/% 谐波次数/次 含有率/% 3 9.725 31 5.108 5 2.683 33 3.230 7 2.750 35 9.415 9 1.750 37 3.388 11 1.575 39 4.708
下载: 导出CSV
-
[1] 习近平. 继往开来, 开启全球应对气候变化新征程: 在气候雄心峰会上的讲话[N]. 中华人民共和国国务院公报, 2020-12-12. [2] 赵剑波,王蕾. “十四五”构建以新能源为主体的新型电力系统[J]. 中国能源,2021,43(5): 17-21.ZHAO Jianbo, WANG Lei. Research on the new power system during the 14th five-year plan[J]. Energy of China, 2021, 43(5): 17-21. [3] 邹游,周婕. 高速铁路对城市及区域发展的影响研究综述[J]. 城市交通,2018,16(4): 15-25.ZOU You, ZHOU Jie. Impact of high-speed railway on urban and regional development: a literature review[J]. Urban Transport of China, 2018, 16(4): 15-25. [4] VASISHT M S, VASHISTA G A, SRINIVASAN J, et al. Rail coaches with rooftop solar photovoltaic systems: a feasibility study[J]. Energy, 2017, 118: 684-691. doi: 10.1016/j.energy.2016.10.103 [5] JAFFERY S H I, KHAN M, ALI L, et al. The potential of solar powered transportation and the case for solar powered railway in Pakistan[J]. Renewable and Sustainable Energy Reviews, 2014, 39: 270-276. doi: 10.1016/j.rser.2014.07.025 [6] 陈维荣,王璇,李奇,等. 光伏电站接入轨道交通牵引供电系统发展现状综述[J]. 电网技术,2019,43(10): 3663-3670.CHEN Weirong, WANG Xuan, LI Qi, et al. Review on the development status of PV power station accessing to traction power supply system for rail transit[J]. Power System Technology, 2019, 43(10): 3663-3670. [7] 伍勇旭,杨光. 关于我国可再生能源发展的政策思考[J]. 中国能源,2016,38(9): 23-25.WU Yongxu, YANG Guang. Considerations on China renewable energy development policy[J]. Energy of China, 2016, 38(9): 23-25. [8] 邓文丽,戴朝华,陈维荣. 光伏接入牵引供电系统的多元制约因素初探[J]. 太阳能学报,2020,41(8): 192-203.DENG Wenli, DAI Chaohua, CHEN Weirong. Preliminary research of multiple constriction for PV access traction power supply system[J]. Acta Energiae Solaris Sinica, 2020, 41(8): 192-203. [9] MAYER O, LYNASS M, GÓMEZ M, et al. Design aspects for high voltage MW PV systems for railway power supply[C]//European PV Solar Energy Conference. Amsterdam: [s.n.], 2014: 2876-2879. [10] 吴传平,罗安,徐先勇,等. 采用V/V变压器的高速铁路牵引供电系统负序和谐波综合补偿方法[J]. 中国电机工程学报,2010,30(16): 111-117.WU Chuanping, LUO An, XU Xianyong, et al. Integrative compensation method of negative phase sequence and harmonic for high-speed railway traction supply system with V/V transformer[J]. Proceedings of the CSEE, 2010, 30(16): 111-117. [11] 邓文丽,戴朝华,陈维荣,等. 铁路功率调节器研究进展[J]. 中国电机工程学报,2020,40(14): 4640-4655, 4742.DENG Wenli, DAI Chaohua, CHEN Weirong, et al. Research progress of railway power conditioner[J]. Proceedings of the CSEE, 2020, 40(14): 4640-4655, 4742. [12] 陈金霞. 基于RPC控制的光伏并网功率调节器及其控制策略[J]. 电气传动,2019,49(4): 61-66.CHEN Jinxia. RPC based on PV grid-connected power conditioner and its control strategy[J]. Electric Drive, 2019, 49(4): 61-66. [13] 邓文丽,戴朝华,韩春白雪,等. 计及再生制动能量回收和电能质量改善的铁路背靠背混合储能系统及其控制方法[J]. 中国电机工程学报,2019,39(10): 2914-2924.DENG Wenli, DAI Chaohua, HAN Chunbaixue, et al. Back-to-back hybrid energy storage system of electric railway and its control method considering regenerative braking energy recovery and power quality improvement[J]. Proceedings of the CSEE, 2019, 39(10): 2914-2924. [14] 魏文婧,胡海涛,王科,等. 基于铁路功率调节器的高速铁路牵引供电系统储能方案及控制策略[J]. 电工技术学报,2019,34(6): 1290-1299.WEI Wenjing, HU Haitao, WANG Ke, et al. Energy storage scheme and control strategies of high-speed railway based on railway power conditioner[J]. Transactions of China Electrotechnical Society, 2019, 34(6): 1290-1299. [15] 马伏军,罗安,吴传平,等. V/V牵引供电系统中铁路功率调节器的控制方法研究[J]. 中国电机工程学报,2011,31(13): 63-70.MA Fujun, LUO An, WU Chuanping, et al. Control methods of railway static power regulator for V/V electrified traction railway[J]. Proceedings of the CSEE, 2011, 31(13): 63-70. [16] 徐敏,吴越涛,赵剑锋. 基于鉴相原理的新型单相电路谐波检测方法[J]. 电工电气,2009(1): 50-52,62.XU Min, WU Yuetao, ZHAO Jianfeng. Novel detection method for harmonic current in single-phase circuit based on the principle of phase discrimination[J]. Electrotechnics Electric, 2009(1): 50-52,62. -
下载:
点击查看大图
计量
- 文章访问数: 292
- HTML全文浏览量: 140
- PDF下载量: 61
- 被引次数: 0