Multiloop control method for high-performance microgrid inverter through load voltage and current decoupling with only output voltage feedback

Qin Lei, Fang Zheng Peng, Shuitao Yang

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

This paper proposes a multiloop controller with voltage differential feedback, and with output voltage decoupling and output current decoupling by only using the output voltage feedback. The output voltage differential feedback loop actively damps the output LC filter resonance and thus increases the system stability margin. The decoupling of output voltage and current makes the inner loop equivalent to a first-order system and thus improves the system dynamic response to load disturbance. The pole placement technique has been used here to design the inner loop and outer loop gain, with considering the effect of system control delay. The proposed control scheme possesses very fast dynamic response at load step change and can also achieve good steady-state performance at both linear and nonlinear loads. In addition, it only uses the output voltage as the feedback variable, which reduces the system complexity. The theoretical conclusion has been verified by simulation and experiment results. This method is proved to be an effective solution for voltage control in stand-alone mode of three-phase microgrid inverters.

Original languageEnglish (US)
Article number5658161
Pages (from-to)953-960
Number of pages8
JournalIEEE Transactions on Power Electronics
Volume26
Issue number3
DOIs
StatePublished - 2011
Externally publishedYes

Fingerprint

Feedback
Electric potential
Dynamic response
Delay control systems
System stability
Voltage control
Poles
Controllers
Experiments

Keywords

  • Dynamic response
  • load current decoupling
  • multiloop
  • only voltage sensed
  • output voltage decoupling
  • voltage differential feedback

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Multiloop control method for high-performance microgrid inverter through load voltage and current decoupling with only output voltage feedback. / Lei, Qin; Peng, Fang Zheng; Yang, Shuitao.

In: IEEE Transactions on Power Electronics, Vol. 26, No. 3, 5658161, 2011, p. 953-960.

Research output: Contribution to journalArticle

@article{581df09d118148d7a72ce49a11316c80,
title = "Multiloop control method for high-performance microgrid inverter through load voltage and current decoupling with only output voltage feedback",
abstract = "This paper proposes a multiloop controller with voltage differential feedback, and with output voltage decoupling and output current decoupling by only using the output voltage feedback. The output voltage differential feedback loop actively damps the output LC filter resonance and thus increases the system stability margin. The decoupling of output voltage and current makes the inner loop equivalent to a first-order system and thus improves the system dynamic response to load disturbance. The pole placement technique has been used here to design the inner loop and outer loop gain, with considering the effect of system control delay. The proposed control scheme possesses very fast dynamic response at load step change and can also achieve good steady-state performance at both linear and nonlinear loads. In addition, it only uses the output voltage as the feedback variable, which reduces the system complexity. The theoretical conclusion has been verified by simulation and experiment results. This method is proved to be an effective solution for voltage control in stand-alone mode of three-phase microgrid inverters.",
keywords = "Dynamic response, load current decoupling, multiloop, only voltage sensed, output voltage decoupling, voltage differential feedback",
author = "Qin Lei and Peng, {Fang Zheng} and Shuitao Yang",
year = "2011",
doi = "10.1109/TPEL.2010.2096992",
language = "English (US)",
volume = "26",
pages = "953--960",
journal = "IEEE Transactions on Power Electronics",
issn = "0885-8993",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "3",

}

TY - JOUR

T1 - Multiloop control method for high-performance microgrid inverter through load voltage and current decoupling with only output voltage feedback

AU - Lei, Qin

AU - Peng, Fang Zheng

AU - Yang, Shuitao

PY - 2011

Y1 - 2011

N2 - This paper proposes a multiloop controller with voltage differential feedback, and with output voltage decoupling and output current decoupling by only using the output voltage feedback. The output voltage differential feedback loop actively damps the output LC filter resonance and thus increases the system stability margin. The decoupling of output voltage and current makes the inner loop equivalent to a first-order system and thus improves the system dynamic response to load disturbance. The pole placement technique has been used here to design the inner loop and outer loop gain, with considering the effect of system control delay. The proposed control scheme possesses very fast dynamic response at load step change and can also achieve good steady-state performance at both linear and nonlinear loads. In addition, it only uses the output voltage as the feedback variable, which reduces the system complexity. The theoretical conclusion has been verified by simulation and experiment results. This method is proved to be an effective solution for voltage control in stand-alone mode of three-phase microgrid inverters.

AB - This paper proposes a multiloop controller with voltage differential feedback, and with output voltage decoupling and output current decoupling by only using the output voltage feedback. The output voltage differential feedback loop actively damps the output LC filter resonance and thus increases the system stability margin. The decoupling of output voltage and current makes the inner loop equivalent to a first-order system and thus improves the system dynamic response to load disturbance. The pole placement technique has been used here to design the inner loop and outer loop gain, with considering the effect of system control delay. The proposed control scheme possesses very fast dynamic response at load step change and can also achieve good steady-state performance at both linear and nonlinear loads. In addition, it only uses the output voltage as the feedback variable, which reduces the system complexity. The theoretical conclusion has been verified by simulation and experiment results. This method is proved to be an effective solution for voltage control in stand-alone mode of three-phase microgrid inverters.

KW - Dynamic response

KW - load current decoupling

KW - multiloop

KW - only voltage sensed

KW - output voltage decoupling

KW - voltage differential feedback

UR - http://www.scopus.com/inward/record.url?scp=79957439639&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79957439639&partnerID=8YFLogxK

U2 - 10.1109/TPEL.2010.2096992

DO - 10.1109/TPEL.2010.2096992

M3 - Article

AN - SCOPUS:79957439639

VL - 26

SP - 953

EP - 960

JO - IEEE Transactions on Power Electronics

JF - IEEE Transactions on Power Electronics

SN - 0885-8993

IS - 3

M1 - 5658161

ER -