Optimized Power Flow Analysis of Photovoltaic Microgrid Adopting Droop Control
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.Com-pared with the traditional power grid,there are a large number of voltage sources with droop control in the microgrid,which can not be e-quivalent 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 isola-ted 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 ob-tained.The characteristic of the proposed method is that the full-node Jacobian matrix is adopted,all nodes participate in the modifica-tion of the state change of the system,the balance nodes are no longer set,and the system frequency is also included in the state varia-bles.Finally,the improved power flow algorithm is verified.
microgridphotovoltaic power generationdistributed power supplypower flow calculationdroop controlimproved Newton-Raphson method
万方数据
维普
