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A Control Algorithm Based on the Conservative Power Theory for Cooperative Sharing of Imbalances in 4-Wire Systems

Burgos-Mellado, Claudio; Cardenas-Dobson, Roberto; Saez, Doris; Costabeber, Alessandro; Sumner, Mark


Claudio Burgos-Mellado

Roberto Cardenas-Dobson

Doris Saez

Alessandro Costabeber

Professor of Electrical Energy Systems


© 1986-2012 IEEE. A cooperative control scheme based on the conservative power theory (CPT) is proposed, which can share imbalances in three-phase four-wire droop-controlled systems. By utilizing the CPT, the balanced, unbalanced, and distorted components of the currents and powers in a microgrid can be identified. Using control loops based on virtual impedances and implemented in the stationary a-b-c frame, the imbalances and harmonics are shared between the different four-leg inverters in the microgrid. A secondary control loop is implemented to regulate the maximum voltage imbalance/distortion at the point of common coupling or any other point in the microgrid. The theoretical background of the method is presented, and experimental validation is demonstrated using a laboratory-scale microgrid with two inverters operating at 5 kW.


Burgos-Mellado, C., Cardenas-Dobson, R., Saez, D., Costabeber, A., & Sumner, M. (2019). A Control Algorithm Based on the Conservative Power Theory for Cooperative Sharing of Imbalances in 4-Wire Systems. IEEE Transactions on Power Electronics, 34(6), 5325-5339.

Journal Article Type Article
Acceptance Date Aug 30, 2018
Online Publication Date Sep 24, 2018
Publication Date 2019-06
Deposit Date Nov 20, 2018
Publicly Available Date Nov 20, 2018
Journal IEEE Transactions on Power Electronics
Print ISSN 0885-8993
Electronic ISSN 1941-0107
Publisher Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
Volume 34
Issue 6
Pages 5325-5339
Keywords Electrical and Electronic Engineering
Public URL
Publisher URL


A Control Algorithm Based On The Conservative Power Theory For Cooperative Sharing Of Imbalances In 4-Wire Systems (1.7 Mb)

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