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Improved droop control strategy for inverters of mismatch parameters in microgrid(PDF)

[ISSN:1007-449X/CN:23-1 408/TM]

Issue:
2016年04
Page:
49-56
Research Field:
Publishing date:

Info

Title:
Improved droop control strategy for inverters of mismatch parameters in microgrid
Author(s):
ZHU Yan-ping LI Qin-qin SUN Xiao-feng WANG Bao-cheng LI Xin
( Key Lab of Power Electronics for Energy Conservation and Motor Drive of Hebei Province, Yanshan University,Qinhuangdao 066004,China)
Keywords:
complex microgrid structure inverters droop control power sharing averaged power
PACS:
TM 464
DOI:
10. 15938 / j. emc. 2016. 04. 007
Abstract:
In view of inverters line impedance and inverters parameters mismatch as well as local loads imbalance in microgrid,an improved real power-voltage ( PV) control strategy was proposed. Averaged output real power of all distributed generation ( DG) units was calculated,and then locally measured real power was subtracted to get power error. An integral term for real power error was added to regulate DG output voltage. With this integral control,the high accurate sharing of both real power and reactive power was achieved. The control strategy makes system have good stability and dynamic performance,which is suitable for complex microgrid structure. Even in the system with different capacity,accurate proportional load sharing among DGs can be obtained. Simulation and experimental results validate the correctness of the proposed strategy.

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Last Update: 2016-06-26