Robust Positive Position Feedback Controller for Voltage Control of Islanded Microgrid

Datta, Dristi; Sheikh, Md. Rafiqul Islam; Sarkar, Subrata; Das, Sajal K.

doi:10.11648/j.ijecec.20180401.16

Cited by 6 publications

(5 citation statements)

References 18 publications

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“…Due to this recursive structure, the designer can start the design process at the known-stable system and "back out" new controllers that progressively stabilize each outer subsystem. The process terminates when the final external control is reached [17]. Hence this process is known as backstepping.…”

Section: Design Of Backstepping Controllermentioning

confidence: 99%

Design of a new backstepping controller for control of microgrid sources inverter

Zadehbagheri

Kiani

Sutikno

et al. 2022

IJECE

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<p><br />Emergency power supply is becoming an important capability for many home or industrial electronic and computer devices. Therefore, the performance of the designed unintermptible power supplies (UPS) inverters has low distortion at the output voltage. Initially, such inverters were controlled by proportional integral (PI) control classic rules. This method is difficult to understand the limitations of stability and to apply transient response to strong external disturbances. In this paper, an inverter is simulated and offered for single-phase and three-phase voltage controlled by a non-linear controller. For this purpose, a comparison has been made between the controller performance and the PI controller. In the first step, there is a backstepping regulator that uses the stability tool next to the Lyapunov function. And the other regulator operates according to the PI method. The performance of these two regulators is simulated during a change in reference or a load change in MATLAB. Also, a method of feedback voltage control based on the Lyapunov theory for controlling of the distributed generation (DG) unit independent Inverter is presented. The proposed controller is not only simple, but also against the sudden changes in load and the unspecified system is resistant.</p>

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Section: Design Of Backstepping Controllermentioning

confidence: 99%

Design of a new backstepping controller for control of microgrid sources inverter

Zadehbagheri

Kiani

Sutikno

et al. 2022

IJECE

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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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“…For line xy: (14) For line yx: (15) Using (10) to (15), the continuous time state space representation for multi-DG based microgrid system is given as A and B, shown at the bottom of the next page, where,…”

Section: Three-phase Multi-source Microgridmentioning

confidence: 99%

“…The proper functioning of DERs depends on various circumstances like wind speed, and solar strength and capacity (among many other factors). Malicious cyberattacks, packet losses and disturbances may cause variation in factors impacting DERs, introducing noise into the system [12]- [14]. To achieve the best possible outcomes and performance, it is necessary to filter out such noise from the state of the system.…”

Section: Introductionmentioning

confidence: 99%

A Novel Blended State Estimated Adaptive Controller for Voltage and Current Control of Microgrid Against Unknown Noise

et al. 2019

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In this study, a novel blended state estimated adaptive controller is designed for voltage and current control of microgrid against unknown noise. The core feature of the microgrid (MG) is its ability to integrate more than one distributed energy resource into the main grid. The state of a microgrid may deteriorate due to many reasons, for example malicious cyber-attacks, disturbances, packet losses, etc. Therefore, it is necessary to achieve the true state of the system to enhance the control requirement and automation of the microgrid. To achieve the true state of a microgrid, this study proposes the use of an algorithm based on the unscented kalman filter (UKF). The proposed state estimator technique is developed using an unscented-transformation and sigma-points measurement technique capable of minimizing the mean and covariance of a nonlinear cost function to estimate the true state of a single-phase, three-phase single-source and three-phase multi-source microgrid system. The advantage of the proposed estimator over using extended kalman filter (EKF) is investigated in simulations. The results demonstrate that the use of the UKF estimator produces a superior estimation of the system compared with the use of the EKF. An adaptive PID controller is also developed and used in system conjunction with the estimator to regulate its voltage and current against the number of loads. Deviation in load parameters hamper the function of the MG system. The performance of the developed controller is also evaluated against number of loads. Results indicate the controller provides a more stable and high-tracking performance with the inclusion of the UKF in the system. INDEX TERMS Microgrid, model reference adaptive control, state estimation, unscented kalman filter, voltage and current control.

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Robust Positive Position Feedback Controller for Voltage Control of Islanded Microgrid

Cited by 6 publications

References 18 publications

Design of a new backstepping controller for control of microgrid sources inverter

Design of a new backstepping controller for control of microgrid sources inverter

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

A Novel Blended State Estimated Adaptive Controller for Voltage and Current Control of Microgrid Against Unknown Noise

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