Cooperative control strategy of energy storage systems and micro sources for stabilizing microgrids in different operation modes

Moradi, Mohammad H.; Eskandari, Mohsen; Hosseinian, S. Mahdi

doi:10.1016/j.ijepes.2015.12.002

Cited by 76 publications

(41 citation statements)

References 35 publications

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“…Automatic disconnections and reconnections of the microgrid to the main grid are controlled by the microgrid controller. The process has been described by Das et al, Vandoorn et al, and Moradi et al . When using the manual procedure, in case of a blackout, the part of the grid that is supplied by the biogas plant is separated from the main grid by hand, and the loads disconnected from the grid.…”

Section: Resultsmentioning

confidence: 99%

Integrating Biogas Plants into Microgrids for Bridging Temporary Power Supply Interruptions

Kirchner¹,

Thrän²

2019

Chem Eng & Technol

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Renewable energies thus far have not become a part of a grid restoration process. By building small island grids after a blackout, renewable energies can be integrated into the grid restoration process. Bioenergy-based power plants have some importance for the supply of such island grids because of their high degree of reliability and controllability. Modern bioenergy plants have electrical loads within a specific kW range, which can be partially used in demand-side management. A concept for the control structure of off-grid energy systems with a demand-side management using a microgrid of a farm supplied by a biogas plant as an example is presented. For the integrability of electrical loads of the biogas plant into the energy management system of the microgrid, an off-grid control procedure has been designed.

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Section: Resultsmentioning

confidence: 99%

Integrating Biogas Plants into Microgrids for Bridging Temporary Power Supply Interruptions

Kirchner¹,

Thrän²

2019

Chem Eng & Technol

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“…The third loop is the current control loop that is used to provide the reference voltage to the VSI. 44,45 To enhance the system power quality, the VSI voltage output is filtered through the LCL filter as it contains higher harmonic orders. 46 A schematic diagram of the traditional control method is shown in Figure 1.…”

Section: Traditional Control Methodsmentioning

confidence: 99%

A multistage H‐infinity–based controller for adjusting voltage and frequency and improving power quality in islanded microgrids

Sedhom

El‐Saadawi

Hatata

et al. 2019

Int Trans Electr Energ Syst

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Summary This paper proposes a novel methodology for controlling voltage and frequency of islanded microgrids and meanwhile improving the system power quality. The proposed methodology is based on applying a multi‐stage H‐Infinity (H∞) controller with different control loops to restore the nominal values of voltage and frequency after any load variation. These control loops include power control, current control, and voltage control loops. The H∞ is also applied with an LCL filter to enhance the system power quality. The proposed controller is applied to a test system under three different loading conditions and the obtained results are compared with that obtained by applying the model predictive control (MPC) method. The results are compared with that obtained by applying a proposed traditional control method in the same test system. A comparison between the droop controller and the proposed controller, MPC is performed based on fitness value, controller response time, and maximum frequency deviation. In addition, the system stability is analysed using root locus, system step response, singular value decomposition, and bode diagram. The results prove the effectiveness and the efficiency of the proposed method in restoring voltage and frequency and improving the system power quality.

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“…However, the generators are not able to store any excess of renewable energy during islanded operation, hence creating frequency excursions because of the imbalance between generation and demand . Battery‐based energy storage system (BESS) can be used to provide a voltage reference to the PV systems during islanded operation because the battery inverter behaves as a voltage source . Furthermore, BESS can store any excess power from the PV systems, maintaining the balance between the generation and demand at all times.…”

Section: Introductionmentioning

confidence: 99%

“…9 Batterybased energy storage system (BESS) can be used to provide a voltage reference to the PV systems during islanded operation because the battery inverter behaves as a voltage source. 10,11 Furthermore, BESS can store any excess power from the PV systems, maintaining the balance between the generation and demand at all times. Based on the literature review, several power-sharing strategies have been used for the islanded networks to maintain the balance between the generation and demand at all time.…”

Section: Introductionmentioning

confidence: 99%

Fuzzy-controlled energy storage system for improving reliability of electricity supply during islanding of photovoltaic systems

Khaw

Wong

Lim

2018

Int Trans Electr Energ Syst

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Summary Photovoltaic (PV) systems are expected to grow on the distribution networks in the future. Under the current regulatory frameworks, islanding operation of PV systems is not permissible because the frequency and voltage of the islanded networks are not regulated and maintained within the statutory limits during islanding operation. Consequently, PV systems must be disconnected immediately in the event of the grid outage as per Malaysian Standards, MS 1873. However, it is proven that the islanded operation of PV systems would enable the owners to consume the available solar energy and help the utility company improve the reliability of electricity supply. To enable the islanded operation of PV systems, a fuzzy‐based controller is developed to drive the operation of the energy storage system to maintain the frequency and voltage within the tolerances during the transition from grid‐connected to islanded operation. Several experimental case studies are performed to show that the fuzzy‐based controller is able to maintain the frequency and voltage within the statutory limits before the islanded networks are reconnected to the grid. It is also shown that the fuzzy controller performs more effective than the proportional‐integrator controller.

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Cooperative control strategy of energy storage systems and micro sources for stabilizing microgrids in different operation modes

Cited by 76 publications

References 35 publications

Integrating Biogas Plants into Microgrids for Bridging Temporary Power Supply Interruptions

Integrating Biogas Plants into Microgrids for Bridging Temporary Power Supply Interruptions

A multistage H‐infinity–based controller for adjusting voltage and frequency and improving power quality in islanded microgrids

Fuzzy-controlled energy storage system for improving reliability of electricity supply during islanding of photovoltaic systems

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