Small-Signal Analysis of the Microgrid Secondary Control Considering a Communication Time Delay

被引：173

作者：

Alves Coelho, Ernane Antonio ^{[1
]}

Wu, Dan ^{[2
]}

Guerrero, Josep M. ^{[2
]}

Vasquez, Juan C. ^{[2
]}

Dragicevic, Tomislav ^{[2
]}

Stefanovic, Cedomir ^{[3
]}

Popovski, Petar ^{[3
]}

机构：

[1] Univ Fed Uberlandia, BR-38400902 Uberlandia, MG, Brazil

[2] Aalborg Univ, Dept Energy Technol, DK-9220 Aalborg, Denmark

[3] Aalborg Univ, Dept Elect Syst, DK-9220 Aalborg, Denmark

来源：

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 2016年 / 63卷 / 10期

关键词：

Delay differential equations (DDEs); frequency and voltage droop control; secondary control; small-signal analysis; INVERTERS; CONSENSUS; AC;

D O I：

10.1109/TIE.2016.2581155

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

This paper presents a small-signal analysis of an islanded microgrid composed of two or more voltagesource inverters connected in parallel. The primary control of each inverter is integrated through an internal current and voltage loops using proportional resonant compensators, a virtual impedance, and an external power controller based on frequency and voltage droops. The frequency restoration function is implemented at the secondary control level, which executes a consensus algorithm that consists of a load-frequency control and a single time delay communication network. The consensus network consists of a time-invariant directed graph and the output power of each inverter is the information shared among the units, which is affected by the time delay. The proposed small-signalmodel is validated through simulation results and experimental results. A root locus analysis is presented that shows the behavior of the system considering control parameters and time delay variation.

引用

页码：6257 / 6269

页数：13

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