Implementation of Nelder -Mead Optimization in Designing Fractional Order PID Controller for ControllingVoltageof Islanded Microgrid

Sikder, Stanley H.; Rahman, Md. Mukidur; Sarkar, Subrata; Das, Sajal K.; Rahman, Md. Arifur; Akter, Masuma

doi:10.1109/icaeee.2018.8643005

Cited by 4 publications

(3 citation statements)

References 10 publications

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“…The function of the LCL filter is to stabilize the grid connected inverter voltage and eliminate the high frequency produced by switching ripple. The voltage across the inductor can be represented as [35], [36]…”

Section: Microgrid Modellingmentioning

confidence: 99%

A Blended Improved H5 Topology With ILQG Controller to Augment the Performance of Microgrid System for Grid-Connected Operations

et al. 2020

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The development of the world demands on the progress of electricity operation and quality enhancement. Microgrid (MG) is a solution that manages the additional need of electricity. The MG generates electricity mostly from renewable energy sources, e.g. solar, wind and hydro. Most renewable energy sources require energy storage system as they are highly unpredictable in nature. An inverter is needed to convert that stored DC power to AC. The presence of a capacitor within the grid provides a galvanic connection that varies the common mode (CM) voltage of the inverter. Thus, the leakage current as well as the total harmonic distortion (THD) of the grid voltage and current increases. The increase of the leakage current hampers the safe operation of the MG. Now-a-days transformerless inverter is gaining more attention because of high efficiency, low cost, less weight and the capability of eliminating the high frequency component from the inverter CM voltage. In addition, a controller inclusion with a transformerless inverter can maintain a near-seamless performance. This paper proposes a blended technique of an improved H5 topology with an Integral Linear Quadratic Gaussian (ILQG) controller for grid-connected MG operations, that reduces the inverter leakage current by keeping the CM voltage constant. Thus it has the capability to reduce the THD of voltage and current. A comparative analysis has been carried out between this technique and existing topologies with different modulation techniques that helps to find out the most optimum inverter package to eliminate the leakage current and reduce the THD of grid voltage and grid current to almost zero. INDEX TERMS Microgrid, transformerless inverter, improved H5 inverter, ILQG controller.

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Section: Microgrid Modellingmentioning

confidence: 99%

A Blended Improved H5 Topology With ILQG Controller to Augment the Performance of Microgrid System for Grid-Connected Operations

et al. 2020

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“…Extensive studies are already done to design an appropriate control framework for ensuring the improved tracking competency of the MG under the change of loads. Among them, proportional-integral-derivative (PID) is getting much popularity due to its simplicity [19], [20]. In [10], [20], authors use various methods like Chien-Hrones-Reswick (CHR), Ziegler-Nichols, Cohen-Coon and linear-matrix-inequality (LMI) to develop the PID controller for the improvement of MG tracking performance.…”

Section: Introductionmentioning

confidence: 99%

Ancillary Voltage Control Design for Adaptive Tracking Performance of Microgrid Coupled With Industrial Loads

et al. 2021

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Although the utilizing of renewable energy sources (RESs) in microgrid (MG) offers a recognized solution to meet the increasing demand, it's performance depend on various meteorological factors of RESs. Again, the functioning of MGs is often affected with certain industrial load dynamics which allowing them to alter the operating region and tracking function of the MGs. The above-mentioned challenges motivate us to design the ancillary voltage control design for enabling the MGs to provide adaptive transient and tracking voltage responses over the changes of various factors like weather, consumer demand, and industrial loads. Firstly, we design an intelligent adaptive control (IAC) framework made by merging with proportional-integral (PI) regulator and artificial neural network (ANN) to sustain the regulated common bus voltage over the mentioned changes. The regulated bus voltage is forwarded to operate the industrial loads via the regulation of inverter-based secondary network (SN). A study on the variation of weather condition and consumer demand is done to show the efficacy of the IAC framework. Secondly, we propose a novel fixed control structure named model reference modified fractional-order PID (MR-F0PID) regulator to maintain the high tracking response of the MG via the control of inverter associated with the SNs. The tracking competency of this fixed control framework is analyzed over the running of a few industrial loads dynamics associated with single-phase inverter based SN and results are compared with the other related existing controllers. Moreover, a mathematical analysis for mapping the stable region is completed here to track down the closed-loop stability area. As a further study, the three-phase inverter based SN associated with several three-phase industrial load is also considered with the same DC bus and analyzed to observe the competency of the proposed fixed MR-FOPID control framework.INDEX TERMS Adaptive controller, DC bus voltage stabilizer, fractional-order regulator, microgrid control and PV source.

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“…A few control methods have been already reported for enhancing the voltage quality of the SN (Sikder et al, 2018a;Sikder et al, 2018b;Armin et al, 2018). Proportional-integralderivative (PID) controller is developed for tracking the voltage due to its simplicity (Sarkar et al, 2018a).…”

Section: Introductionmentioning

confidence: 99%

A Robust Control Method for Damping and Tracking of Secondary Network Voltage of a PV Based Hybrid AC/DC Microgrid

et al. 2020

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Implementation of Nelder -Mead Optimization in Designing Fractional Order PID Controller for ControllingVoltageof Islanded Microgrid

Cited by 4 publications

References 10 publications

A Blended Improved H5 Topology With ILQG Controller to Augment the Performance of Microgrid System for Grid-Connected Operations

A Blended Improved H5 Topology With ILQG Controller to Augment the Performance of Microgrid System for Grid-Connected Operations

Ancillary Voltage Control Design for Adaptive Tracking Performance of Microgrid Coupled With Industrial Loads

A Robust Control Method for Damping and Tracking of Secondary Network Voltage of a PV Based Hybrid AC/DC Microgrid

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