Advanced vector control for voltage source converters connected to weak grids
By Agustí Egea-Alvarez, S. Fekriasl, O. Gomis‐Bellmunt. IEEE Power & Energy Society General Meeting, 2015
209 citations recorded by the source corpus.
This paper addresses an advanced vector current control for a voltage source converter (VSC) connected to a weak grid. The proposed control methodology permits high-performance regulation of the active power and the voltage for the feasible VSC range of operation. First, the steady state characteristics for a power converter connected to a very weak system with a short circuit ratio (SCR) of 1 are discussed in order to identify the system limits. Then, the conventional vector control (inner loop) and the conventional power/voltage control (outer loop) stability and frequency responses are analyzed. From the analysis of the classic structure, an enhanced outer loop based on a decoupled and gain-scheduling controller is presented and its stability is analyzed. The proposed control is validated by means of dynamic simulations and it is compared with classic vector current control. Simulation results illustrate that the proposed control system could provide a promising approach to tackle the challenging problem of VSC in connection with weak AC grids.
Subfields: Control and Systems Engineering, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/266bdf08c734a9767035ac8e0a3c05096c4b0c03
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Citations in the corpus
- Analysis and Performance Enhancement of Vector-Controlled VSC in HVDC Links Connected to Very Weak Grids (2017, methodology): “Although all these facts are not explicitly mentioned in [21], they forced its authors to undertake the complicated process of designing 35 controllers for a single converter.”