Power Sharing Improvement in Standalone Microgrids with Decentralized Control Strategy

Saghafi, Hadi; Karshenas, Hamid Reza

doi:10.1080/15325008.2014.927030

Cited by 15 publications

(8 citation statements)

References 14 publications

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“…As can be seen from (15), (17), (21) and (24), the proposed strategy of HMG requires information about lines parameters. This information is usually available to the MG operator.…”

Section: Sources Control Strategymentioning

confidence: 99%

“…sharing can occur as a result of voltage magnitude variation in a MG buses caused by line impedances [20,21]. To reduce or eliminate this error, several attempts have been made [20][21][22][23][24][25][26][27][28][29]. In [22] and [23].…”

mentioning

confidence: 99%

“…However, these invasive methods have the disadvantage of line current distortions [20]. In [21] and [24], reactive power sharing is achieved by activating an enabling signal for a specific interval. However, if load variation happens in this interval, error in reactive power sharing and stability problems could occur.…”

mentioning

confidence: 99%

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An improved power control strategy for hybrid AC-DC microgrids

Baharizadeh

Karshenas

Guerrero

2018

International Journal of Electrical Power & Energy Systems

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This paper presents a new droop-based control strategy for hybrid microgrids (HMG) with improved power sharing. When ac microgrids (AC-MG) and dc microgrids (DC-MG) are present in a distribution grid, there is an opportunity to interconnect them via an interlinking converter (IC) and form a HMG. Power sharing and adequate voltage/frequency control are the main functions of AC-MG and DC-MG control systems in standalone mode. When it comes to a HMG, active power sharing throughout the whole system must also be properly achieved by controlling the IC active power throughput. Furthermore, the possibility of participation of IC in AC-MG reactive power adds some complexity to a HMG control system. In this paper, a new decentralized control strategy is presented for a HMG which relies on regulating the voltage magnitude of a common bus in each microgrid. In this regard, new droop characteristics for sources across both microgrids as well as IC are proposed. The proposed droop characteristics result in better active/reactive power sharing across both microgrids and at the same time results in better voltage regulation. The derivation of new droop characteristics is thoroughly discussed in this paper. Simulation results are used to show the improvement achieved.

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“…As can be seen from (15), (17), (21) and (24), the proposed strategy of HMG requires information about lines parameters. This information is usually available to the MG operator.…”

Section: Sources Control Strategymentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

An improved power control strategy for hybrid AC-DC microgrids

Baharizadeh

Karshenas

Guerrero

2018

International Journal of Electrical Power & Energy Systems

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“…Selecting the appropriate control strategy is affected by several factors, the MG operation mode being one of them. In the grid‐connected mode, all the DGs usually are controlled to inject specified active and reactive power to the MG and are known as PQ inverters . In the isolated mode, at least one of the DGs must control the voltage and frequency in the MG.…”

Section: Introductionmentioning

confidence: 99%

“…In the grid-connected mode, all the DGs usually are controlled to inject specified active and reactive power to the MG and are known as PQ inverters. 9 In the isolated mode, at least one of the DGs must control the voltage and frequency in the MG. If the aforementioned DGs are inverter-based, they are called V/f inverters and are usually controlled using the droop method.…”

Section: Introductionmentioning

confidence: 99%

Induction machine-based flywheel energy storage system modeling and control for frequency regulation after micro-grid islanding

Arani

Zaker

Gharehpetian

2017

Int Trans Electr Energ Syst

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Summary Imbalance between generation and consumption in each instant can result in frequency instability. A storage device that responds quickly to changes and is capable of energy injection or consumption in a microgrid (MG) can improve frequency stability. The Flywheel Energy Storage System (FESS) has this characteristic. In this paper, a detailed model of the FESS is presented, and its control strategies for frequency regulation are proposed and discussed. The field oriented control is used for machine‐side convertor control of FESS. Two MG islanding scenarios and the performance of the proposed control strategy are studied by MATLAB/Simulink. The simulation results show good FESS performance with regard to frequency changes in the MG.

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