一种孤岛微电网先导节点选取方法  

A selection method for pilot buses in an islanded micro-grid

作　　者：杨向真[1] 邓湾湾 段梦珂 杜燕[1] 苏建徽[1] Yang Xiangzhen;Deng Wanwan;Duan Mengke;Du Yan;Su Jianhui(School of Electrical and Automatic Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,合肥230009

出　　处：《电测与仪表》2018年第14期13-20,26,共9页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(51307042;51407057;51541703);安徽省自然科学基金资助项目(1408085QE97);台达环境与教育基金会<电力电子科教发展计划>重大研究项目(DREM2015002)

摘　　要：为了实现孤岛微电网中多母线电压调节和逆变器间功率的合理分配,设计了一种多时间尺度的电压协调控制结构,为了选取合适的先导节点使得基于PI的二次电压控制和三次电压优化控制能够达到全网最佳的电压控制效果,基于多时间尺度的电压协调控制结构提出了一种孤岛微电网先导节点选取方法,在系统受到高斯随机扰动的情况下,控制某些节点电压偏差为零时,以负荷节点的电压偏差二次指标和最小作为目标函数,同时对先导节点选取过程中的潮流计算部分提出了一种含二次电压频率控制的潮流计算方法,并给出了先导节点选取的流程和注意事项,最后通过算例仿真验证了所提方法的有效性和可行性。A multi-time scale coordinated voltage control architecture is designed in this paper to achieve well regulations of multi-bus voltages and power distribution among inverters in an islanded micro-grid.In order to accomplish the best effectiveness of voltage control for the whole micro-grid under the control of the secondary voltage control based on PI regulator and the tertiary optimal voltage control,a selection method for pilot buses in an islanded micro-grid for this multi-time scale coordinated voltage control is proposed in this paper.The selection objective function is to choose the minimum summation of the square of load voltage deviations when the deviation of certain bus is controlled to zero under the Gaussian random disturbance of system load.Moreover,a new power flow calculation method considering the secondary voltage and frequency control is proposed during the selection process of pilot buses.Then,the flowchart and caution items for the selection of pilot buses are also introduced.Finally,the effectiveness and feasibility of proposed method is verified by the simulation results.

关 键 词：微电网 二次电压频率控制 先导节点 目标函数 潮流计算 

分 类 号：TM933[电气工程—电力电子与电力传动]