采用下垂控制并网的光伏微电网优化潮流分析  

Optimized Power Flow Analysis of Photovoltaic Microgrid Adopting Droop Control

作　　者：李俊 左宝峰 程林 谭洪涛 LI Jun;ZUO Baofeng;CHENG Lin;TAN Hongtao(State Grid Shaanxi Electric Power Research Institute,Xi’an Shaanxi 710000,China;Wuhan Zhongyuan Huadian Power Equipment Co.,Ltd.,Wuhan Hubei 430000,China)

机构地区：[1]国网陕西省电力公司电力科学研究院,陕西西安710000 [2]武汉中元华电电力设备有限公司,湖北武汉430000

出　　处：《电子器件》2024年第3期832-841,共10页Chinese Journal of Electron Devices

基　　金：陕西省重点研发计划高校联合项目-重点项目(2021GXLH-Z-059)。

摘　　要：为了控制当前的环境污染问题并解决能源短缺问题,微电网作为新型电力网络逐渐进入人们的视野,为我国能源问题带来了新机遇。相比于传统电网,微电网中存在大量采用下垂控制的电压型电源,其无法等值成传统潮流计算中的节点类型,因此传统电网的潮流计算方法已经不再适用于微电网。从微电网的整体控制策略入手,考虑了孤岛微电网实际存在的不同分布式电源的控制方式。建立了微电网中分布式电源模型与负荷模型。对传统电网潮流计算中应用的牛顿-拉夫逊法进行改进,得到适用于孤岛微电网的潮流计算方法。所提方法的特点是采用全节点雅可比矩阵,所有节点都参与系统的状态变化的修正,不再设置平衡节点,同时将系统频率也纳入了状态变量中。最后对改进的潮流算法进行了验证。In order to control the current environmental pollution and solve the problem of energy shortage,microgrid,as a new type of power network,has gradually entered people’s field of vision.It brings new opportunities for the energy problem of our country.Compared with the traditional power grid,there are a large number of voltage sources with droop control in the microgrid,which can not be equivalent to the node types in the traditional power flow calculation,so the traditional power flow calculation method is no longer suitable for the microgrid.Starting with the overall control strategy of microgrid,the different control modes of distributed power supply in isolated island microgrid are considered.The distributed power model and load model in microgrid are established.Newton-Raphson method used in traditional power flow calculation is improved,and a power flow calculation method suitable for isolated island microgrid is obtained.The characteristic of the proposed method is that the full-node Jacobian matrix is adopted,all nodes participate in the modification of the state change of the system,the balance nodes are no longer set,and the system frequency is also included in the state variables.Finally,the improved power flow algorithm is verified.

关 键 词：微电网 光伏发电 分布式电源 潮流计算 下垂控制 改进牛顿-拉夫逊法 

分 类 号：TM744[电气工程—电力系统及自动化]