Passivity-based control technique for integration of DG resources into the power grid

This paper describes the development of a multifunction control strategy for the stable operation of distributed generation (DG) units during the integration with the power grid. The proposed control model is based on direct Lyapunov control (DLC) theory and provides a stable region for the proper operation of DG units during the integration with the power grid. The compensation of instantaneous variations in the reference current components in ac-side and dc-voltage variations in the dc-side of the interfacing system are adequately considered in this control plan, which is the main contribution and novelty of this paper in comparison with previous control strategies. Utilization of the DLC technique in DG technology can confirm the continuous injection of maximum active power in fundamental frequency from the DG source to the power grid, compensating all the reactive power and harmonic current components of grid-connected loads through the integration of DG link into the grid. Application of this concept in smart grids system can guarantee to reduce the stress on the utility grid during the peak of energy demand. Simulation and experimental test results are presented to demonstrate the proficiency and performance of the proposed DLC technique in DG technology.

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“…The proposed control strategy which combines (14), (15), (25), and (26) can create a global asymptotic stable region for the DG operating areas.…”

Section: Dlc Technique Representationmentioning

confidence: 99%

A Multifunction Control Strategy for the Stable Operation of DG Units in Smart Grids

Pouresmaeil

Mehrasa

Catalão

2015

IEEE Trans. Smart Grid

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“…1 The bipolar switching functions a S , b S , c S shown in (1) present the switching actions for the six switches [10] . It is assumed that the conducting resistances of the switches are negligible.…”

Section: A Modeling In Energy Invertion Situationmentioning

confidence: 99%

A simulation study of control methods for three-phase energy storage inverter

Lou

2015

2015 IEEE International Conference on Information and Automation

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In this paper, a simulation study of control methods for three-phase energy storage inverter (TPESI) is presented. In energy invertion situation, the proportional integral (PI) control scheme and passivity-based control (PBC) scheme based on single loop control structure are discussed and compared. In energy storage situation, the control structure is usually taken as double loop form: inner current loop and outer voltage loop for the better control performance of both currents and dc voltage. The PI double loop control and some comprehensive control strategies such as the combination of PBC scheme and active disturbance rejection (ADR) control scheme, shorted for PBC-ADR control, and the combination of PBC and PI (PBC-PI) control are discussed. By simulating in Matlab/Simulink environment, the control performances of each method mentioned above are compared and discussed.

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“…The conventional control uses pulse width modulation (PWM) methods which linearize power converters while power converters and drive systems are controlled in cascade multi loop systems with proportional integral (PI) regulators [17][18][19][20]. New strategies proposed in [19,20], etc.…”

Section: Introductionmentioning

confidence: 99%

A Model Predictive Control-Based Power Converter System for Oscillating Water Column Wave Energy Converters

et al. 2017

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Abstract:Despite the predictability and availability at large scale, wave energy conversion (WEC) has still not become a mainstream renewable energy technology. One of the main reasons is the large variations in the extracted power which could lead to instabilities in the power grid. In addition, maintaining the speed of the turbine within optimal range under changing wave conditions is another control challenge, especially in oscillating water column (OWC) type WEC systems. As a solution to the first issue, this paper proposes the direct connection of a battery bank into the dc-link of the back-to-back power converter system, thereby smoothening the power delivered to the grid. For the second issue, model predictive controllers (MPCs) are developed for the rectifier and the inverter of the back-to-back converter system aiming to maintain the turbine speed within its optimum range. In addition, MPC controllers are designed to control the battery current as well, in both charging and discharging conditions. Operations of the proposed battery direct integration scheme and control solutions are verified through computer simulations. Simulation results show that the proposed integrated energy storage and control solutions are capable of delivering smooth power to the grid while maintaining the turbine speed within its optimum range under varying wave conditions. Keywords: active front end rectifier; finite control set-model predictive control (FCS-MPC); two-level voltage source inverter; wave energy conversion (WEC)

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Passivity-based control technique for integration of DG resources into the power grid

Cited by 47 publications

References 26 publications

A Multifunction Control Strategy for the Stable Operation of DG Units in Smart Grids

A Multifunction Control Strategy for the Stable Operation of DG Units in Smart Grids

A simulation study of control methods for three-phase energy storage inverter

A Model Predictive Control-Based Power Converter System for Oscillating Water Column Wave Energy Converters

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