Font Size: a A A

Research On Simulation Of Low Voltage Hybrid Microgrid Towards Common Electricity Customers

Posted on:2017-09-28Degree:MasterType:Thesis
Country:ChinaCandidate:J W WangFull Text:PDF
GTID:2322330512978895Subject:Electrical engineering
Abstract/Summary:PDF Full Text Request
The microgrid can effectively solve the problems of the access and usage of the distributed resources for current common electricity customers,which has been widely recognized by scholars at home and abroad.This paper studies low voltage hybrid microgrid for common electricity customers,which can effectively integrate the customers' distributed generation resources like roof photovoltaic:(1)For the common electricity customers like residential area of the family,public school community,commercial districts,etc,this paper improves the traditional hybrid microgrid topology structure and does research on the low hybrid microgrid topology based on circuit switching mechanism.Because the bidirectional switch array is arranged on the AC load side,the microgrid has three working modes,and the AC side load can be managed more flexibly and effectively by the load bidirectional switch array.(2)Every mathematical model in low voltage hybrid microgrid system is established,including rooftop photovoltaic,battery,supercapacitor,converter,load,switch array,LCL filter,etc.Connecting these modules in the simulation software,the simulation model of the whole system can be achieved.(3)To ensure high efficiency and stable operation of the system,the control strategies of bidirectional DC/AC converter,energy storage converter and load have been formulated for different working modes of low voltage microgrid,as well as the energy management strategy.Finally,these strategies are verified through simulation in concrete simulation scenarios for different working modes.The result shows that the management strategy proposed in the paper can make low voltage hybrid microgrid based on circuit switching mechanism effectively respond to the changes of its operating scenarios under different working modes.Through active adjustment of hybrid energy storage and load,the utilization ratio of PV output power is increased and the local load can get efficient and reliable power supply.What's more,the system can achieve good dynamic performance while prolonging the lifespan of battery at the same time.
Keywords/Search Tags:Low voltage hybrid microgrid, Centralized layered energy management strategy, Demand side management, Rooftop photovoltaic, Hybrid energy storage
PDF Full Text Request
Related items