| 引用本文: | 顾煜炯,谢典,和学豪,赵兴安,耿直,余裕璞.海岛直流微网复合储能系统控制策略设计与实现[J].电力自动化设备,2018,(6): |
| GU Yujiong,XIE Dian,HE Xuehao,ZHAO Xing'an,GENG Zhi,YU Yupu.Design and implementation of control strategy of hybrid energy storage system in island DC microgrid[J].Electric Power Automation Equipment,2018,(6): |
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| 摘要: |
| 针对海岛直流微网中发电微源输出功率不稳定造成的母线电压大幅度波动问题，基于300 kW海洋能集成供电系统的功率输出特点，采用由蓄电池和超级电容组成的复合储能系统，对其3种拓扑结构进行了对比分析，优选了对该供电系统而言最佳的拓扑结构，并提出了一种新型复合储能协调控制策略。该控制策略依据母线电压的3个阈值将系统划分成5个工作区域，储能系统依据直流母线电压值实现充放电工作模式的自动识别和切换；以蓄电池为主要出力单元，避免超级电容的频繁投切，减少不必要开关动作造成的系统谐波。利用搭建的实验平台验证了所述控制策略的有效性和可靠性。 |
| 关键词: 海岛直流微网 复合储能 协调控制 母线电压 蓄电池 超级电容 |
| DOI：10.16081/j.issn.1006-6047.2018.06.001 |
| 分类号:TM761 |
| 基金项目:国家高技术研究发展计划(863计划)资助项目(300 kW海洋能集成供电示范系统)(SS2012AA052601) |
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| Design and implementation of control strategy of hybrid energy storage system in island DC microgrid |
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GU Yujiong, XIE Dian, HE Xuehao, ZHAO Xing'an, GENG Zhi, YU Yupu
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State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China
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| Abstract: |
| In order to solve the problem of large amplitude fluctuations of bus voltage caused by the instability of generator output power in the island DC microgrid, based on the power output characteristics of the 300 kW ocean energy integrated power supply system, a hybrid energy storage system composed of a battery and a super capacitor is adopted, its three topologies are compared and analyzed to select the optimum topology structure for the integrated power supply system, and then its coordinated control strategy is proposed. The system is divided into five working areas by the proposed control strategy according to three threshold values of bus voltage. The energy storage system can automatically identify and switch between the charging and discharging modes, and can avoid the frequent switching of super capacitor and reduce the harmonics in the system caused by the unnecessary switch actions by making the battery as the main output unit. The effectiveness and reliability of the proposed control strategy are verified by an established experimental platform. |
| Key words: island DC microgrid hybrid energy storage coordinated control bus voltage electric batteries super capacitor |
