Improved Virtual Synchronous Generator Principle for Better Economic Dispatch and Stability in Grid-Connected Microgrids with Low Noise

Abstract

The proper operation of microgrids depends on Economic Dispatch. It satisfies all requirements while lowering the microgrids’ overall operating and generation costs. Since distributed generators constitute a large portion of microgrids, seamless communication between generators is essential. While guaranteeing a reliable microgrid operation, this should be achieved with the fewest losses as possible. The distributed generator technology introduces noise into the system by design. To find the best economic dispatch strategy, noise was considered in this research as a limitation in grid-connected microgrids. The microgrid’s performance was improved, and the proposed technique also showed increased resilience. A virtual synchronous generator (VSG) control approach is proposed with a noiseless consensus-based algorithm to improve the power quality of microgrids. Voltage and frequency regulation modules are the foundation of the VSG paradigm. The synchronous generator’s second-order equation (hidden-pole configuration) was also used to represent the voltage of the stator and rotor motion. This study compared changes in power, frequency, and voltage for the microgrid by utilizing the described control approach using MATLAB. According to the findings, this method aids in controlling load and noise variations and offers distributed generators an efficient control strategy.

Comparison amongst Lagrange, Firefly, and ABC Algorithms for Low-Noise Economic Dispatch and Reactive Power Compensation in Islanded Microgrids

“…If optimal IC is not met, then the units are sent a signal via the agents' system to modify their generation output while satisfying their constraints. Once the optimal IC is reached, it is then sent to VSG (detailed control strategy is available in [40]) and the STATCOM controller to stabilize active power and compensate for reactive power, respectively. This stabilized power output is then sent to the loads via point of common coupling (PCC).…”

“…where G D = total load; G loss = losses during power transmission; G min i = minimum generation limit of generator i; and G max i = maximum generation limit of generator i. To calculate the Lagrangian function and incremental cost, the formulae are discussed in [40].…”

“…A dependable and secure electricity management system is provided by the cooperation of all of these modules. Each modules' detailed working is provided in [40].…”

“…When the system is operating in island mode, f ref is used as the reference value [40]. The power frequency co-efficient k p value is used by the frequency regulation module to set primary regulation.…”

“…If the reference v comes within the expected range, it is chosen as fg; otherwise, it is chosen as fref. Whe system is operating in island mode, fref is used as the reference value [40]. The p frequency co-efficient kp value is used by the frequency regulation module to set pri regulation.…”