Research And Application Of Micro-grid External Characteristic Modeling And Micro-grid Feature Vector

The help of simplified equivalent model of the Microgrid is needed for the aspects of analyzing and setting control strategy of Multi-Microgrid or distribution networks containing Microgrid, since the internal structure of Microgrid is complicated. Microgrid overall external characteristic equivalent modeling is the important means to simplify the multiple Microgrid system in simulation analysis. It not only simplifies the single Microgrid’s control and operation strategy, at the same time also can improve the control efficiency of the whole system. However, micro network contains a wide range of distributed power generations and loads. And considering the influence of the inverter control mode of Microgrid characteristics, the difficulty of the research of micro network equivalent is largely increased. So there is no widely recognized equivalent model of Microgrid. So it’s quite important to study the model of Microgrid. Based on these problems, this paper mainly researches in the following four aspects:1. Study on Microgrid’s operation characteristics and Microgrid’s control strategies, as well as the control modes of micro sources’ inverter Set up Microgrid’s simulation model. In order to study the Microgrid’s overall external characteristic, in the simulation model an external fault is set. Observing Microgrid’s overall external changes presented in the fault.2. Put forward mechanism model and non-mechanism model of Microgrid. Referring to the methods of power load equivalent modeling research, study on the dynamic equivalence method which is suitable for the Microgrid. Choose equivalent synchronous generator model as mechanism model, and choose the transfer function model as non-mechanism model. Use improved immune algorithm for parameter identification. Verify the accuracy of the methods combined with the case studies.3. Study other model of the Microgrid. Put forward modeling method for some special phenomenon in Microgrid such as voltage slow recovery phenomena in Microgrid contains a large number of blocked motors. In view of the equipment digital transfer, Microgrid equipment data standardization model is set up.4. Study the feature vectors which are applicable to Microgrid. Use them in the Microgrid clustering withself-adaptive FCM algorithm as application.