叶海涵,陈武,郝文波,王长宝,侯凯,江小兵,胡秦然
YE Haihan,CHEN Wu,HAO Wenbo,WANG Changbao,HOU Kai,JIANG Xiaobing,HU Qinran

• 1:东南大学电气工程学院(先进电能变换技术与装备研究所)
• 2:国网黑龙江省电力有限公司电力科学研究院
• 3:南瑞集团有限公司(国网电力科学研究院有限公司)

摘要(Abstract)：

针对应急现场中重要负荷供电的高可靠性需求,提出一种多能源接入储能移动方舱的拓扑与电压控制方法,可促进现场多类型能源汇集与利用,实现交直流母线电压稳定控制。采用直流母线分立、交流母线并联的方式防止重要负荷供电中断,并提供了详细的主电路拓扑及参数设计;直流母线采用分段下垂控制,在系统额定运行时取消下垂控制的稳态静差,在储能电池临近极限时充分调动外部能源以防止过冲、过放;通过储能变换器的参考值自动更新可实现交流母线频率校正、外部新能源及内部储能电池优先供电,并加入了SOC(荷电状态)均衡函数以避免应急保障系统电路重组;柴油发电机仅作为热备用,可提高重要负荷供电可靠性,减小燃料运输负担。仿真结果验证了所提方案的有效性与可行性。
For the requirement of high-reliability on key load in the emergency field, this paper proposes a topology and voltage control method of energy storage mobile cabin with multiple energy access, which can promote the collection and utilization of various in-field energy sources and control the stability of AC and bus voltage. A method of isolated DC bus and paralleled AC bus is employed to prevent interruption of power supply for the key load. Besides, a design scheme of main circuit topology and parameter is proposed. The DC bus adopts the segmented droop control, which cancels the static error of droop control under steady-state operation and mobilizes external energy to prevent overcharge or discharge when energy storage battery approaches the limit. The automatically updated reference of energy storage converter can realize the AC bus frequency correction and the power supply priority of external renewable and internal energy storage battery. SOC(state of charge) balance function is added to avoid circuit reorganization of emergency support system. The diesel generator is only used for hot standby, which can improve power supply reliability for key loads and reduce fuel transportation burden. Finally, the effectiveness and feasibility of the proposed scheme are verified by the simulation results.

关键词(KeyWords)： 应急电源;可靠供电;多源接入;协调控制;电能质量校正
emergency power source;reliable power supply;multi-source access;coordinated control;power quality correction

Abstract:

Keywords:

基金项目(Foundation): 国家电网有限公司科技项目（5418-202040248A-0-0-00）

作者(Author): 叶海涵,陈武,郝文波,王长宝,侯凯,江小兵,胡秦然
YE Haihan,CHEN Wu,HAO Wenbo,WANG Changbao,HOU Kai,JIANG Xiaobing,HU Qinran

DOI: 10.19585/j.zjdl.202104010

参考文献(References)：

• [1]米阳，宋根新，蔡杭谊，等.基于分段下垂的交直流混合微电网自主协调控制[J].电网技术，2018,42(12):3941-3950.
• [2]GU Y,LI W,HE X.Passivity-based control of DC micro grid for self-disciplined stabilization[J].IEEE Transactions on Power Systems,2015,30(5):2623-2632.
• [3]米阳，陈鑫，季亮，等.基于虚拟额定电流的直流微电网分布式储能单元精确电流分配研究[J].电网技术，2020,44(3):823-834.
• [4]HAN Y,NING X,YANG P,et al.Review of power sharing,voltage restoration and stabilization techniques in hi erar chical controlled DC microgrids[J].IEEE Access,2019,7:149202-149223.
• [5]ZHANG Q,LI Y,DING Z,et al.Self-adaptive secondary frequency regulation strategy of micro-grid with multiple virtual synchronous generators[J].IEEE Transactions on Industry Applications,2020,56(5):6007-6018.
• [6]阳建，刘勇，盘宏斌，等.基于虚拟同步机的微网逆变器无频差控制[J].电网技术，2016,40(7):2001-2008.
• [7]XU Q,HU X,WANG P,et al.A decentralized dynamic power sharing strategy for hybrid energy storage system in autonomous DC microgrid[J].IEEE Transactions on Industrial Electronics,2016,64(7):5930-5941.
• [8]刘子文，苗世洪，范志华，等.基于自适应下垂特性的孤立直流微电网功率精确分配与电压无偏差控制策略[J].电工技术学报，2019,34(4):163-174.
• [9]GAO F,BOZHKO S,ASHER G,et al.An improved voltage compensation approach in a droop-controlled DC power system for the more electric aircraft[J].IEEE Transactions on Power Electronics,2016,31(10):7369-7383.
• [10]SHI R,ZHANG X,HU C,et al.Self-tuning virtual synchronous generator control for improving frequency stability in autonomous photovoltaic-diesel microgrids[J].Journal of Modern Power Systems and Clean Energy,2018,6(3):482-494.
• [11]石荣亮，张兴，刘芳，等.提高光储柴独立微网频率稳定性的虚拟同步发电机控制策略[J].电力系统自动化，2016,40(22):77-85.
• [12]胡超，张兴，石荣亮，等.分布式电源并联系统中基于荷电状态均衡的改进型下垂控制策略[J].太阳能学报，2019,40(3):809-816.
• [13]胡超，张兴，石荣亮，等.独立微电网中基于自适应权重系数的VSG协调控制策略[J].中国电机工程学报，2017,37(2):516-524.
• [14]PAN P,CHEN W,MU H.Decentralized unified control strategy for medium and low voltage DC distribution power system[C]//8th Renewable Power Generation Conference(RPG 2019).Shanghai,China:Shanghai Jiaotong University,2019:1-6.
• [15]林渭勋.现代电力电子技术[M].北京：机械工业出版社，2005.
• [16]王晓明.电动汽车交错并联双向DC/DC变换器的研究[D].淮南：安徽理工大学，2018.
• [17]吴恒，阮新波，杨东升，等.虚拟同步发电机功率环的建模与参数设计[J].中国电机工程学报，2015,35(24):6508-6518.
• [18]黄宇淇，姜新建，邱阿瑞.LCL滤波器在三相PWM整流器中的应用[J].电力自动化设备，2008,28(12):110-113.
• [19]SHI K,SONG W,GE H,et al.Transient analysis of microgrids with parallel synchronous generators and virtual synchronous generators[J].IEEE Transactions on Energy Conversion,2020,35(1):95-105.
• [20]LUNA A,ROCABERT J,CANDELA J I,et al.Grid voltage synchronization for distributed generation systems under grid fault conditions[J].IEEE Transactions on Industry Applications,2016,51(4):3414-3425.