Optimal angle droop power sharing control for autonomous microgrid

Moussa, Hassan; Shahin, Ahmed; Sharif, Fadi; Martin, Jean-Philippe; Pierfederici, Serge

doi:10.1109/ecce.2015.7309731

Cited by 6 publications

(2 citation statements)

References 17 publications

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“…Thus, by applying the droop control for inverters, the frequency of inverters changes in case of a load variation, so that the frequency variation results in active power sharing, and similarly, the voltage variation leads to reactive power sharing. Furthermore, in P/f droop control, the frequency is opted to regulate the active power instead of phase angle; because the inverter-based DGs do not sense and detect the initial phase angle of other units [23], [24]. In summary, the droop control equations are as follows:…”

Section: Droop Control Of Parallel Invertersmentioning

confidence: 99%

A Novel Accurate Power Sharing Method Versus Droop Control In Autonomous Microgrids With Critical Loads

et al. 2019

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In autonomous microgrids, the well-known frequency and voltage droop control are extensively used to share active and reactive powers among parallel inverters without using any communication infrastructure. However, power sharing is performed at the expense of altering the voltage and frequency of the system. To restore the voltage and frequency to their nominal amounts, a secondary control loop is often augmented to the system using communication links. To avoid using these complex hierarchical controls, this paper proposes a novel method for power sharing in parallel inverters providing constant frequency and nominal voltage operation for critical loads. The proposed method uses a simple structure based on communication links utilization. The simulation results show that the active and reactive powers are accurately shared with an acceptable transient response. Furthermore, the results are compared with the conventional droop control to show the superiority of the proposed method over the conventional one. INDEX TERMS Autonomous microgrid, active and reactive power sharing, constant frequency operation, critical loads.

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Section: Droop Control Of Parallel Invertersmentioning

confidence: 99%

A Novel Accurate Power Sharing Method Versus Droop Control In Autonomous Microgrids With Critical Loads

et al. 2019

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“…Droop gain is modified according to the variation in the rate of change of frequency. Angle droop control is developed in [26] instead of frequency droop and the additional control actions to restore the frequency can be avoided in this method. Participation analysis is done in [27] to know the contribution of different states on harmonic frequency oscillation modes and a reduced-order model is proposed based on that.…”

Section: Introductionmentioning

confidence: 99%

Small signal stability improvement of a microgrid by the optimised dynamic droop control method

Mija

Cheriyan

2019

IET Renewable Power Generation

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Renewable energy-based energy conversion technologies have become more relevant due to environmental considerations even though they are intermittent in nature. As a result, the concept of microgrid and microgrid control techniques have been evolved as major areas of power system research. Among different inverter control methods, the droopbased control method is more popular in microgrid systems due to its simplicity and non-requirement of expensive communication systems. The transient performance, power-sharing accuracy and decoupling between real and reactive power are improved by modifying the natural droop control method. In this study, the selected microgrid system consists of two inverters operating in parallel, two interconnecting lines and three loads. A state-space model of the microgrid is created based on the small-signal stability and the transient response is improved by introducing virtual impedance and dynamic droop gains. The different controller parameters are optimised using particle swarm optimisation ensuring stability. Eigenvalue analysis is done to analyse stability. The analysis of the response of the system for various disturbances validates the effectiveness of the proposed controller. The strategy developed ensures improved power-sharing capability with high values of natural droop gains without compromising stability by using optimised dynamic droop gains.

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Voltage harmonic distortion compensation with non-linear load power sharing in low-voltage islanded microgrid

Moussa

Martin

Pierfederici

et al. 2019

Mathematics and Computers in Simulation

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Optimal angle droop power sharing control for autonomous microgrid

Cited by 6 publications

References 17 publications

A Novel Accurate Power Sharing Method Versus Droop Control In Autonomous Microgrids With Critical Loads

A Novel Accurate Power Sharing Method Versus Droop Control In Autonomous Microgrids With Critical Loads

Small signal stability improvement of a microgrid by the optimised dynamic droop control method

Voltage harmonic distortion compensation with non-linear load power sharing in low-voltage islanded microgrid

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