Open AccessDroop-free controls of inverter-based generator for use in systems that interconnected with synchronous generators
Author(s) -
Suchart Janjornmanit,
Sakorn Panta,
Wirat Nakkrongdee
Publication year - 2021
Publication title -
international journal of power electronics and drive systems/international journal of electrical and computer engineering
Language(s) - English
Resource type - Journals
eISSN - 2722-2578
pISSN - 2722-256X
DOI - 10.11591/ijpeds.v12.i2.pp765-771
Subject(s) - voltage droop , microgrid , automatic frequency control , inverter , computer science , control theory (sociology) , frequency deviation , phase locked loop , power (physics) , generator (circuit theory) , frequency grid , permanent magnet synchronous generator , electric power system , synchronization (alternating current) , ac power , grid , voltage , control (management) , engineering , voltage source , electrical engineering , telecommunications , mathematics , jitter , channel (broadcasting) , physics , geometry , quantum mechanics , artificial intelligence
Because of its simplicity and autonomous operation, droop control technique is widely implemented for power generation control in microgrids. Despite its popularity, it has been reported that the technique has the stability problem. In this paper, the previous work of droop-free inverter-based generator designed for operating in a fix frequency islanded microgrid, is redesigned to have the ability to operate in both islanded and grid connected microgrid as well as to the main power grid where it interconnected with synchronous generators. The proposed voltage source inverters use phase locked loop(PLL) algorithm to synchronize the changing frequency due to the operation of the synchronous generator. Unlike the frequency droop control that the output frequency is varied as its active power changed, the proposed controls do not make an adjustment of the system frequency. This kind of operation reduces the chance of the system unstable due to severe frequency change and it also reduces the frequency deviation when it increases its active power output. Simulation and result of the meshed power network demonstrate the feasibility to implement the proposed controls in thereal system.