Real Time Simulation of Modified Bias Based Load Disturbance Rejection Controller for Frequency Regulation of Islanded Micro-Grid

Abstract

The paper presents a real time modelling of self-reliant isolated grid comprising both governable and ungovernable sources. The frequency of this system must be maintained to its desired value by reducing its deviation occurred when there is a mismatch between the load demand and the actual power generation. In order to achieve it, the actual power output of the micro-grid is required to regulate. Therefore, an attempt is made in this paper to design a modified bias (MB) with LDR (load disturbance rejection) based PID (proportional integral derivative) Controller and it can also be called droop based controller (DBC). Simulation of the micro-grid system with proposed MB-LDR based control scheme is successfully done in Real Time Simulation platform using the digital simulator of OPAL-RT OP4510. Simulation results of the system for different conditions are presented and analysis is given in details. Thereafter, comparative performance of the results obtained using proposed MB-LDR based controller with that of LDR and classical controllers is made. Results show that the proposed MB-LDR based controller gives better response as compare to other two methods in terms of peak transient deviation, settling time and number of oscillations.

Load frequency control of a m ulti‐source multi‐area thermal system including biogas–solar thermal along with pumped hydro energy storage system using MBA ‐optimized 3DOF‐TIDN controller

“…The capacity of CAES and FES is 5MWh. 11 The transfer function parameters of FES and CAES collected 10,11 and given as (38) and (39). The optimized values of controller gains are presented connecting FES and CAES are shown in Table 5.…”

“…RT-LAB models are fully integrated with MATLAB/Simulink. Authors 38,39 in their article used OPAL-RT to validate their study in real-time platform and also explained procedures. It has been observed from the literature survey that in LFC study, the uses of OPAL-RT laboratory are very narrow; hence, it always motivates the researcher to utilize RT-LAB to validate their work in realtime platform.…”

Maiden application of TIDN ‐(1+ PI ) cascade controller in LFC of a multi‐area hydro‐thermal system incorporating EV–Archimedes wave energy‐geothermal‐wind generations under deregulated scenario

“…RT‐LAB, which are fully integrated with MATLAB/Simulink, offers flexible and scalable results for the power systems. Kumar et al 41,42 used OPAL‐RT in micro grid to validate the considered system on real‐time platform and explicated the procedures. However, the real‐time simulation of large interconnected power system using OPAL‐RT is very limited in LFC studies; thus requiring investigation to achieve experimental validation.…”