A Local Power Control Scheme for Electronically Interfaced Distributed Generators in Islanded Microgrids

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SADEGHIAN MOHAMMAD; FANI BAHADOR; SADEGHKHANI IMAN; SHAHGHOLIAN GHAZANFAR

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Journal: IRANIAN ELECTRIC INDUSTRY JOURNAL OF QUALITY AND PRODUCTIVITY (IEIJQP) Year:2020 | Volume:8 | Issue:3 (17) Page(s): 47-58

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Title

A Local Power Control Scheme for Electronically Interfaced Distributed Generators in Islanded Microgrids

Author(s)

SADEGHIAN MOHAMMAD | FANI BAHADOR | SADEGHKHANI IMAN | SHAHGHOLIAN GHAZANFAR | Issue Writer Certificate

Keywords

Distributed generationQ2

Islanded microgridQ1

Droop characteristicsQ1

Reactive power sharingQ1

Voltage-sourced inverterQ1

Abstract

The conventional real power-frequency and reactive power-voltage Droop characteristics are commonly employed to share the electric power among parallel Distributed generation (DG) units. Despite some advantages such as easy implementation and no need for communication infrastructure, inaccurate Reactive power sharing is one of the main disadvantages of conventional droop control. This paper presents a modified droop control scheme based on changing the y-intercept of the voltage droop characteristic. In this method, the initial control of the inverter-based DG units is performed using conventional Droop characteristics. Then, the Reactive power sharing error for each DG unit is determined by injecting a small real power disturbance and making a coupling between the real and reactive powers. Accordingly, the modified reactive power controller modifies the generated reactive power of each DG unit by changing the output voltage. As this process should be simultaneously implemented in all DG units and employment of the central controller and the communication link for activation of the modification procedure has some disadvantages, this paper presents a local activation mechanism. The proposed scheme operates based on a significant change of reactive power and ensures the execution of all stages of modified droop control and its reactivation to respond to the microgrid power changes. Several simulation case studies using a low voltage microgrid network verify the effectiveness of the proposed control scheme.

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APA: Copy

SADEGHIAN, MOHAMMAD, FANI, BAHADOR, SADEGHKHANI, IMAN, & SHAHGHOLIAN, GHAZANFAR. (2020). A Local Power Control Scheme for Electronically Interfaced Distributed Generators in Islanded Microgrids. IRANIAN ELECTRIC INDUSTRY JOURNAL OF QUALITY AND PRODUCTIVITY (IEIJQP), 8(3 (17) ), 47-58. SID. https://sid.ir/paper/226172/en

Vancouver: Copy

SADEGHIAN MOHAMMAD, FANI BAHADOR, SADEGHKHANI IMAN, SHAHGHOLIAN GHAZANFAR. A Local Power Control Scheme for Electronically Interfaced Distributed Generators in Islanded Microgrids. IRANIAN ELECTRIC INDUSTRY JOURNAL OF QUALITY AND PRODUCTIVITY (IEIJQP)[Internet]. 2020;8(3 (17) ):47-58. Available from: https://sid.ir/paper/226172/en

IEEE: Copy

MOHAMMAD SADEGHIAN, BAHADOR FANI, IMAN SADEGHKHANI, and GHAZANFAR SHAHGHOLIAN, “A Local Power Control Scheme for Electronically Interfaced Distributed Generators in Islanded Microgrids,” IRANIAN ELECTRIC INDUSTRY JOURNAL OF QUALITY AND PRODUCTIVITY (IEIJQP), vol. 8, no. 3 (17) , pp. 47–58, 2020, [Online]. Available: https://sid.ir/paper/226172/en

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