Decoupling Strategy for Three-phase Photovoltaic Grid-connected Inverters Based on Double Closed-loop Strategy

DOI

10.2991/978-94-6463-986-5_77How to use a DOI?

Keywords

Grid-Connected Photovoltaic Inverter; Dual-Loop Control; Voltage Feed-forward; Feed-forward Decoupling; Power Control

Abstract

With the increasing penetration of distributed photovoltaic (PV) systems, grid-connected PV inverters must achieve rapid, accurate, and low-harmonic power injection across a wide operating range. Conventional control methods in the abc stationary reference frame exhibit significant steady-state errors and severe AC coupling effects, failing to meet high power quality requirements. To address the power tracking accuracy and dynamic response challenges in three-phase PV inverters, this paper proposes a dual-loop control strategy implemented in the dq rotating reference frame, consisting of an outer power loop and an inner current loop. By converting AC quantities into DC components through dq transformation, and incorporating grid voltage feed-forward and feed-forward decoupling compensation, independent active/reactive power control is achieved. Simulation results demonstrate rapid power response without steady-state error during dynamic processes—where active power (P) increases from 2.5 kW to 5 kW at 0.1 s and reactive power (Q) rises from 0 kVA to 3 kVA at 0.2 s, verifying the effectiveness and stability of the proposed control strategy.

Copyright

© 2026 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Jiayi Zhao
PY  - 2026
DA  - 2026/02/18
TI  - Decoupling Strategy for Three-phase Photovoltaic Grid-connected Inverters Based on Double Closed-loop Strategy
BT  - Proceedings of the 2025 International Conference on Electronics, Electrical and Grid Technology (ICEEGT 2025)
PB  - Atlantis Press
SP  - 755
EP  - 762
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-986-5_77
DO  - 10.2991/978-94-6463-986-5_77
ID  - Zhao2026
ER  -