Dynamic Coordination Control Strategy for DC Active Distribution Systems with Multi PV-Storage Microgrids

doi:10.16628/j.cnki.2095-8188.2022.05.011

Abstract

Abstract:

Aiming at the stable operation of the distribution network system with distributed power access,a dynamic cooperative control method for the distribution system with multi PV-storage microgrid is proposed.Firstly,a radial DC active distribution system structure with the two-level DC bues of the distribution network and microgrid is designed,and the adjacent microgrid level DC bues are connected by tie switches.Different operating modes of the system under grid-connected and islanded operation are designed.To ensure the stable operation of the system,a dynamic coordination control strategy among interface units including P/Q control,U_DC/Q control and U/f control is proposed.Finally,through MATLAB/Simulink simulation experiments,the correctness and effectiveness of the proposed control strategy are verified from four aspects of photovoltaic system (PVS) output fluctuation,load capacity change,fault and connected-grid switching.

Key words: DC distribution system, dynamic coordination control, voltage control, interconnection switch, simulation analysis

CLC Number:

TM732

MA Muyuan, ZHAO Yanhui, LI Guoqing. Dynamic Coordination Control Strategy for DC Active Distribution Systems with Multi PV-Storage Microgrids[J]. LOW VOLTAGE APPARATUS, 2022, 0(5): 71-77.

Figures/Tables 12

References 18

[1]	李国栋, 王峥, 郝帅, 等. 分布式电源接入对配电网运行指标的影响评估[J]. 电器与能效管理技术, 2021(6):79-85.
[2]	曹新慧, 付林, 高玲玉, 等. 消弭新能源并网运行风险的储能控制策略[J]. 电器与能效管理技术, 2021(5):75-80.
[3]	蔡晖, 陈倩, 刘宇, 等. 苏州同里新能源小镇的交/直流混合配电网潮流计算方法研究[J]. 电力电容器与无功补偿, 2020, 41(2):110-115.
[4]	ELSAYED A T, MOHAMED A A, MOHAMMED O A. DC micro-grids and distribution systems:An overview[J]. Electric Power Systems Research, 2015, 119:407-417. doi: 10.1016/j.epsr.2014.10.017
[5]	宋强, 赵彪, 刘文华, 等. 智能直流配电网研究综述[J]. 中国电机工程学报, 2013, 33(25):9-19.
[6]	李学军, 郭建华, 赵尔敏, 等. 计及边缘计算任务分配优化的电能质量分析[J]. 电器与能效管理技术, 2021(6):92-98.
[7]	段建东, 孙茜, 陈鲁鹏, 等. 基于改进和声搜索算法的有源配电网优化调度[J]. 高压电器, 2021, 57(11):1-9.
[8]	吴卫民, 何远彬, 耿攀, 等. 直流微电网研究中的关键技术[J]. 电工技术学报, 2012, 27(1):98-106.
[9]	文波, 秦文萍, 韩肖清, 等. 基于电压下垂法的直流微电网混合储能系统控制策略[J]. 电网技术, 2015, 39(4):892-898.
[10]	董宜鹏, 谢小荣, 孙浩, 等. 微电网电池储能系统通用综合控制策略[J]. 电网技术, 2013, 37(12):3310-3316.
[11]	张怀宇, 徐超然, 黄志龙, 等. 考虑光伏发电不确定性的源-网-荷-储协调调度方法[J]. 电器与能效管理技术, 2021(5):86-92.
[12]	SALOMONSSON D, SANNINO A. Low-voltage DC distribution system for commercial power systems with sensitive electronic loads[J]. Power Delivery,IEEE Transactions on, 2007, 22(3):1620-1627. doi: 10.1109/TPWRD.2006.883024
[13]	欧阳丽, 周丽红, 向海斌, 等. 无需互联通信的直流微电网实时功率协调控制策略[J]. 电网技术, 2015, 39(12):3449-3456.
[14]	刘文亮. 直流微电网自适应两阶段下垂控制方法[J]. 电器与能效管理技术, 2021(8):59-63.
[15]	应益强, 付蓉, 黄校娟, 等. 基于不确定性优化理论的电网三级电压控制策略[J]. 电器与能效管理技术, 2019(8):60-66.
[16]	郑智丹. 电池储能系统减少光伏电站弃光应用模式及控制策略分析[J]. 电器与能效管理技术, 2018(23):58-61,78.
[17]	陆晓楠, 孙凯, 黄立培, 等. 直流微电网储能系统中带有母线电压跌落补偿功能的负荷功率动态分配方法[J]. 中国电机工程学报, 2013, 33(16):37-46.
[18]	季一润, 袁志昌, 赵剑锋, 等. 一种适用于柔性直流配电网的电压控制策略[J]. 中国电机工程学报, 2016, 36(2):335-341.

参数	数值
配电网级直流母线电压/V	800
微电网级直流母线电压/V	380
交流负载电压/V	380
交流负载频率/Hz	50
各段直流线路阻抗/(10^-4 Ω)	3.15、3.5、2.63、1.75