Power decoupling method for synchronous reference frame-based vector control

Zhen Gong, Xiaorong Xie, Chengxi Liu, Filipe Faria da Silva, Yonghao Gui

Research output: Contribution to journalArticlepeer-review

Abstract

This short communication analyzes the power coupling mechanism of synchronous reference frame-based vector control (SRF-VC) of voltage source inverter (VSI), which is caused by the variation of voltage angle difference (VVAD) between voltage at point of common coupling (PCC) and grid voltage. Then, a power closed loop transfer function model is proposed to study the power coupling characteristics. It reveals that when there is an increase of output real power, the VSI will absorb coupling reactive power from power grids which will limit its real power transfer capability and even cause transient instability. Next, a power decoupling strategy for SRF-VC is proposed based on a dynamic feedforward power compensation (DFPC) algorithm, and its power decoupling capability is analyzed based on the transfer function. Simulations and experimental results show that the proposed method can not only reduce power coupling magnitudes in transient stage, but also realize power ripple cancellation in quasi-steady state.

Original languageEnglish
Article number110429
JournalInternational Journal of Electrical Power and Energy Systems
Volume164
DOIs
StatePublished - Mar 2025
Externally publishedYes

Funding

This work is supported by National Natural Science Foundation of China (U22B20100, 51925701, and 52321004), State Key Laboratory of Power System Operation and Control (SKLD24KM14), State-funded Postdoctoral Researcher Program (GZC20231212).

Keywords

  • Dynamic feedforward power compensation
  • Power decoupling
  • Variation of voltage angle difference
  • Voltage source inverter

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