摘要
针对主动配电网的电压越限和波动问题,提出了一种基于多时间尺度的传统调压设备与分布式发电机(distributed generators,DGs)双层协调控制电压的方法。外层控制为日内滚动优化控制,以较长的时间间隔调节传统调压设备和可调度分布式能源(different time-scale DGs,DSPDGs),使所有节点电压维持在正常范围内,该层控制以网络损耗最小为目标函数建立优化模型,采用二阶锥规划算法高效求解。内层控制为外层控制步长内的关键节点在线优化控制,抑制关键节点的电压波动,该层控制仅以DGs为控制设备,以DGs控制关键节点电压变量偏离外层整定值最小为目标,建立基于电压灵敏度的优化模型。修订的IEEE 37系统算例分析表明,DGs协同传统调压设备调压,能够有效抑制关键节点电压的频繁波动,阻止网络电压越限,减轻传统调压设备的负担。
To resolve the voltage violation and fluctuation in active distribution network(ADN),this paper proposes a two-level coordinated control method of the traditional voltage regulation devices(TVRD)and the distributed generators(DGs)based on multi-timescales.The outer-level is an intraday rolling optimization,using the TVRD and DGs to sustain normal voltages of all nodes with a relatively long time interval.In this level,the minimum network loss is taken as the objective function to set up the optimization model,and it is solved by applying the second-order cone programing algorithm.In the inner-level,only DGs are controlled to regulate online the critical nodes voltage within the time step of the outer-level.The online optimization model is built based on voltage sensibility,considering the minimum of the difference between critical nodes voltage and its reference value and control cost as the objective.The proposed scheme is verified on a modified IEEE 37-bus distribution network.The results show that DGs and TVRD can work together to restrain the frequent fluctuation of the critical nodes voltage,keep the network voltages within the limits and relax the burden on the TVRD operation.
作者
庄慧敏
张江林
刘兴茂
ZHUANG Huimin;ZHANG Jianglin;LIU Xingmao(School of Control Engineering,Chengdu University of Information Technology,Chengdu 610225,China)
出处
《南方电网技术》
北大核心
2018年第6期52-59,共8页
Southern Power System Technology
关键词
主动配电网
多时间尺度
双层电压控制
二阶锥规划
基于灵敏度的在线优化
active distribution network(ADN)
multi-timescale
two-level voltage control
second-order cone programming
online optimization based on sensibility
