Control Strategy of Distributed Energy Storage in Island Distribution Network

doi:10.3969/j.issn.1000－7229.2018.04.012

Abstract

Abstract: ABSTRACT： To improve the reliability of the power grid with energy storage systems, this paper studies the control strategy of distributed energy storage to realize island mode of distribution network. Firstly, the constant voltage and frequency control strategy of LC filter power converter system （PCS） based on virtual resistor is proposed. Secondly, the droop control strategy based on the addition of virtual inductance is proposed, the decoupling control of active and reactive power when resistance is large in the distribution network can be achieved. And the method to obtain a reasonable value of the virtual inductance is given. Then, the state of charge （SOC） feedback is introduced which can dynamically adjust the active control parameters in droop control, the rational distribution of active energy among different energy storage is realized. Finally, an IEEE 14 node distribution network is set up in Simulink platform, and 4 distributed energy storage devices are connected to realize the island mode of the distribution network. The simulation results verify the effectiveness of the control strategy, which can realize the island operation in the distribution network.

Key words: KEYWORDS： distributed energy storage, distribution network, island operation, droop control

CLC Number:

LI Jiaji1, YU Baoxin1, ZHANG Huadong1, LI Wenlong1, XUE Yushi2, CHU Tiezhu1, BI Ran1. Control Strategy of Distributed Energy Storage in Island Distribution Network[J]. Electric Power Construction, 2018, 39(4): 83-.

References

［1］李秀磊, 耿光飞, 季玉琦, 等. 考虑实际运行的配电网电池储能系统的优化配置研究［J］. 电力系统保护与控制, 2017, 45（9）: 88-94.

LI Xiulei, GENG Guangfei, JI Yuqi, et al. Study on optimal allocation of battery energy storage in distribution network considering the actual operation［J］. Power System Protection and Control, 2017, 45（9）: 88-94.

［2］李建林,马会萌,袁晓冬, 等. 规模化分布式储能的关键应用技术研究综述［J］. 电网技术, 2017, 41（10）: 3365-3375.

LI Jianlin, MA Huimeng, YUAN Xiaodong, et al. Overview on key applied technologies of large-scale distributed energy storage［J］. Power System Technology, 2017, 41（10）: 3365-3375.

［3］ZHAO Haoran, WU Qiuwei, WANG Chengshan, et al. Fuzzy logic based coordinated control of battery energy storage system and dispatchable distributed generation for microgrid［J］. Journal of Modern Power Systems and Clean Energy, 2015, 3（3）: 422-428.

［4］杨锡运, 董德华, 李相俊, 等. 商业园区储能系统削峰填谷的有功功率协调控制策略［J/OL］. 电网技术, 2017, http://kns.cnki.net/kcms/detail/11.2410.TM.20171122.0922.001.html. DOI：10.13335/j.1000-3673.pst.2017.2098.

YANG Xiyun, DONG Dehua, LI Xiangjun, et al. Active power coordinated control strategy of peak load shifting for energy storage system in business park［J/OL］. Power System Technology, 2017, http://kns.cnki.net/kcms/detail/11.2410.TM.20171122.0922.001.html. DOI：10.13335/j.1000-3673.pst.2017.2098.

［5］胡娟, 杨水丽, 侯朝勇, 等. 规模化储能技术典型示范应用的现状分析与启示［J］. 电网技术, 2015, 39（4）: 879-885.

HU Juan, YANG Shuili, HOU Chaoyong, et al. Present condition analysis on typical demonstration application of large-scale energy storage technology and its enlightenment［J］. Power System Technology, 2015, 39（4）:879-885.

［6］陆晓楠, 孙凯, 黄立培, 等. 孤岛运行交流微电网中分布式储能系统改进下垂控制方法［J］. 电力系统自动化, 2013, 37（1）: 180-185.

LU Xiaonan, SUN Kai, HUANG Lipei, et al. Improved droop control method in distributed energy storage systems for autonomous operation of AC microgrid［J］. Automation of Electric Power Systems, 2013, 37（1）: 180-185.

［7］梁海峰, 郑灿, 高亚静, 等. 微网改进下垂控制策略研究［J］. 中国电机工程学报, 2017, 37（17）: 4901-4910.

LIANG Haifeng, ZHENG Can, GAO Yajing, et al. Research on improved droop control strategy for microgrid［J］. Proceedings of the CSEE, 2017, 37（17）: 4901-4910.

［8］李福东, 吴敏. 微网孤岛模式下负荷分配的改进控制策略［J］. 中国电机工程学报, 2011, 31（13）: 18-25.

LI Fudong, WU Min. An improved control strategy of load distribution in an autonomous microgrid［J］. Proceedings of the CSEE, 2011, 31（13）: 18-25.

［9］徐少华, 李建林. 光储微网系统并网/孤岛运行控制策略［J］. 中国电机工程学报, 2013, 33（34）: 25-33.

XU Shaohua, LI Jianlin. Grid-connected/island operation control strategy for photovoltaic/battery micro-grid［J］. Proceedings of the CSEE, 2013, 33（34）: 25-33.

［10］李建林, 徐少华, 惠东. 一种适合于储能PCS的PI与准PR控制策略研究［J］. 电工电能新技术, 2016, 35（2）: 54-61.

LI Jianlin, XU Shaohua, HUI Dong. Control strategy research of energy storage PCS based on PI controller and quasi PR controller［J］. Advanced Technology of Electrical Engineering and Energy, 2016, 35（2）: 54-61.

［11］徐少华, 李建林, 惠东. 多储能逆变器并联系统在微网孤岛条件下的稳定性分析及其控制策略［J］. 高电压技术, 2015, 41（10）: 3266-3273.

XU Shaohua, LI jianlin, HUI Dong. Stability analysis and control strategy of parallel storage inverter system working under the micro-grids island condition［J］. High Voltage Engineering, 2015, 41（10）: 3266-3273.

［12］GUERRERO J M, VASQUEZ J C, MATAS J, et al. Hierarchical control of droop-controlled AC and DC microgrids: A general approach toward standardization［J］. IEEE Transactions on Industrial Electronics, 2011, 58（1）: 158-172.

［13］王炜信, 段建东, 张润松, 等. 孤岛电网中多储能设备SOC一致性优化策略［J］. 电工技术学报, 2015, 30（23）: 126-135.

WANG Weixin, DUAN Jiandong, ZHANG Runsong, et al. Optimal state-of-charge balancing control for paralleled battery energy storage devices in islanded microgrid［J］. Transactions of China Electrotechnical Society, 2015, 30（23）: 126-135.

［14］李鹏程, 张纯江, 袁然然，等. 改进SOC下垂控制的分布式储能系统负荷电流分配方法［J］. 中国电机工程学报,2017, 37（13）: 3746-3754. LI Pengcheng, ZHANG Chunjiang, YUAN Ranran,et al. Load current sharing method of distributed energy storage systems by improved SOC drooping control［J］. Proceedings of the CSEE, 2017, 37（13）: 3746-3754.

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