Open AccessDemonstration of voltage control in a real distribution system using model predictive control
Author(s) -
Balram Pavan,
Carlson Ola,
Tuan Le Anh
Publication year - 2017
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2016.1595
Subject(s) - voltage controller , controller (irrigation) , control theory (sociology) , ac power , voltage , voltage regulation , voltage source , voltage optimisation , model predictive control , voltage regulator , computer science , power (physics) , engineering , control (management) , voltage droop , electrical engineering , agronomy , artificial intelligence , biology , physics , quantum mechanics
This study presents the results from field tests that were carried out with the aim of verifying the performance of a model predictive control‐based voltage controller. A voltage source converter (VSC) capable of producing or consuming 4 MVAr was used as the reactive power source, which was able to influence the voltage magnitude at a remote bus within a real distribution system in Gothenburg, Sweden. The voltage controller is designed to maintain the remote bus voltage within a pre‐defined range while respecting the reactive power output capability of the VSC and an objective of minimum changes to the reference value of its local reactive power controller. Results from the field tests demonstrate that the voltage controller was able to successfully regulate the voltage even with significant errors in the state‐space prediction model. An important lesson learned from the field test is that a smoothened voltage measurement feedback is critical to a satisfactory functioning of the controller. Furthermore, it is recommended to design the voltage controller to observe an initial delay, before it is activated for bus voltage control ‐ this would deter it from unnecessarily reacting at the very instant it is brought online.