基于多时间尺度的微电网群阶梯控制方法研究  

Step control method of multi-microgrids based on different time levels

作　　者：颜宁[1] 潘霄 张明理 马少华[1] 张博 刘颖明[1] YAN Ning;PAN Xiao;ZHANG Ming-li;MA Shao-hua;ZHANG Bo;LIU Ying-ming(School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China;State Grid Liaoning Electric Power Company Limited Economic Research Institute, Shenyang 110015, China)

机构地区：[1]沈阳工业大学电气工程学院,沈阳110870 [2]国网辽宁省电力有限公司经济技术研究院,沈阳110015

出　　处：《电机与控制学报》2019年第9期26-34,共9页Electric Machines and Control

基　　金：国家自然科学基金(51677121)

摘　　要：针对含高比例可再生能源的微电网存在功率波动较大的问题,提出一种适用于多微电网互联的不同时间尺度阶梯控制方法,综合考虑系统中负荷需求、储能容量、微电网运行三者之间关系,基于不同时间等级进行了三层调控,本地控制层按分布式电源位置进行区域划分,以线路损耗最小为目标进行秒级调控;微电网自治控制层采用调节系统内的功率输出,以储能系统的利用率及分布式电源运行成本最小为目标进行分钟级调控;微电网群中央控制层在满足各个子微电网优化运行,以并网点功率偏差最小为目标进行小时级调控。选取不同的权重系数对微电网群多目标优化问题进行求解,结果表明基于不同时间等级的分层调控方法,有效地提高了微电网群运行的自治性、稳定性和经济性,提高了并网的可靠性、安全性。For microgrids with high proportion of renewable energy, there is a problem of large power fluctuations.A step control method of multi-microgrids based on different time levels was proposed.The relationship between load demand, energy storage capacity and microgrid operation in the system were considered comprehensively, the three-layer control was adopted based on different time levels, the local control layer was divided into regions according to the distributed power source position, and was controlled in seconds by the minimum line loss;The micro-network autonomous control layer was used to adjust the power output in the system, and was subject to minute-level regulation with the goal of utilization of the energy storage system and the minimum operating cost of the distributed power supply;The central control layer of the micro-network group was used to satisfy the optimization operation of each sub-microgrid, and the hour-level regulation was carried out with the goal of minimizing the power deviation of the grid-connected points.The multi-objective optimization problem of micro-network group was solved by selecting different weight coefficients, the results show that by hierarchical control method based on different time levels, the autonomy, stability and economy of multi-microgridsoperation are effectively improved, and the reliability and security of the grid connection are improved.

关 键 词：储能 多时间尺度 阶梯控制 多微电网互联 协调调度 

分 类 号：TM734[电气工程—电力系统及自动化]