Title :
Small-signal stability analysis of a microgrid operating in droop control mode
Author :
Hongtao Shi ; Fang Zhuo ; Lixiang Hou ; Xiaolong Yue ; Dong Zhang
Author_Institution :
Sch. of Electr. Eng., Xi´an Jiaotong Univ., Xi´an, China
Abstract :
Microgrid consists of various micro sources, power electronic devices, and constant power loads (CPLs), because of which, there is a stability problem in such system. Therefore, stability analysis must be taken into consideration regardless of in the design or in the operation of microgrid. In this paper, the method modeling the CPLs in AC system is analyzed. A small signal state-space model of microgrid is developed, which consists of a sub-model of power controller, a sub-model of CPLs, and a sub-model of network and loads. The relationship between the small-signal stability of microgrid and such affecting factors as droop gain, CPLs, and equivalent line impedance is studied. A simulation model of a microgrid operating in islanding mode is developed in PSCAD, to demonstrate the conclusion of eigenvalue analysis.
Keywords :
control system synthesis; distributed power generation; eigenvalues and eigenfunctions; power control; signal processing; stability; state-space methods; AC system; CPL; PSCAD; constant power loads; droop control mode; droop gain; eigenvalue analysis; equivalent line impedance; islanding mode; load submodel; micro sources; microgrid; network submodel; power controller; power electronic devices; simulation model; small-signal stability analysis; state-space model; Eigenvalues and eigenfunctions; Equations; Mathematical model; Microgrids; PSCAD; Resistance; droop control; microgrid; small-signal stability;
Conference_Titel :
ECCE Asia Downunder (ECCE Asia), 2013 IEEE
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-4799-0483-9
DOI :
10.1109/ECCE-Asia.2013.6579209
