Improving Voltage Profile of Islanded Microgrid using PI Controller

Abstract

In islanding operating mode of microgrid, the voltage and frequency of system must be maintained by the microgrid, or else the system will crumble due to the characteristics of different distributed generators (DG) utilized in microgrid. The voltage and frequency lost provision when main grid is disconnected. This paper presents PI controller based voltage controller to regulate voltage to its normal condition. The controller is proposed to be utilized individually with each distributed generator (DG) in microgrid. The controller compares inverter output voltage with voltage at point of common coupling (PCC) and its output is feed to PWM pulse generator to generate appropriate pulses for inverter to regulate voltage to its nominal value. The simulation results of proposed system are shown using MATLAB/Simulink platform.

Regulation of Voltage and Frequency in Solid Oxide Fuel Cell-Based Autonomous Microgrids Using the Whales Optimisation Algorithm

“…during load changing mode (15) where K p_v , K i_v , K p_ f and K i_ f are the PI controller gain values for the regulating voltage and frequency of MGS during transition mode of operation and K pv_load , K iv_load , K p f _laod and K i f _laod are gain values of the PI controller for regulating the voltage and frequency of the MGS during load variation mode. The range of values for PI controller are selected based on a trial and error method as presented in [11].…”

“…Methods for analyzing system dynamic stability while improving the system reliability and the parameters required for analysis and design of PV/Wind hybrid system are given at [12]. The types of controllers utilized for microgrids (PQ and Vf), the criteria for power-sharing between the grid and MG during the grid-connected mode of MG and performance of MGS during islanding mode have also been analysed in [13][14][15]. However, these systems did not consider the tuning of control parameters, which may be required during the transition of MGS operating modes or load variation.…”

Voltage profile enhancement in distribution network using static synchronous compensator STATCOM

“…Many works have been suggested for the implementation of voltage profile enhancement in the literature. Improving Voltage Profile using PI Controller in [7]. Whereas [8] presents Optimal location of UPFC to enhence voltage profile.…”

“…In [9] presents Enhancement of voltage profile using SVC. The use of PI controller in [7], has many drawbacks that needs tunning at each operating point, slow in response and less smoother. The use of UPFC in [8], needs settings and controllers for both STATCOM and also for SSSC.…”

“…The new porposed of STATCOM for voltage profile enhancement with Fuzzy logic control is a high-speed response and smoother than conventional controller also the propsed system use VSC instead of passive element in SVC. The use of d-q theory to calculate the reactive power and the bus voltage for compensation added another feature of small-time calculation of about one cycle compared with previous works [7], [8] and [9] that takes more than one cycle for calculation the peak amplitude, and need more peripherals design.…”