A decentralized control strategy to bring back frequency and share reactive power in isolated microgrids with virtual power plant

• Autorzy: Khanjanzadeh Amir , Soleymani Soodabeh , Mozafari Babak

Identyfikatory

DOI

10.24425/bpasts.2021.136190

• Języki publikacji: EN

Abstrakty

EN

In this paper, a novel Power-Frequency Droop Control (PFDC) is introduced to perfectly bring back the system frequency and share the reactive power in isolated microgrid with virtual power plant (VPP). The frequency-based power delivery must be essentially implemented in VPP which can operate as a conventional synchronous generator. It has been attained by enhancing the power processing unit of each VPP to operate as an active generator. The inverter coupling impedance which has been assigned by the virtual impedance technique has reduced the affected power coupling resulting from line resistance. The reference has been subsequently adjusted to compensate the frequency deviation caused by load variation and retrieve the VPP frequency to its nominal value. In addition, the line voltage drop has compensated the voltage drop and load sharing error to obliterate the reactive power sharing imprecision resulting from the voltage deviation. The voltage feedback confirms the correct voltage after compensating the voltage drop. As an illustration, conventional PFDC after a load change cannot restore the system frequency which is deviated from 50 Hz and rested in 49.9 Hz while, proposed PFDC strategy fades away the frequency deviation via compensating the variation of the frequency reference. Likewise, the frequency restoration factor ( γ) has an effective role in retrieving the system frequency, i.e., the restoration rate of the system frequency is in proportion with γ. As a whole, the simulation results have pointed to the high performance of proposed strategy in an isolated microgrid.

Słowa kluczowe

EN

PFDC; power-frequency droop control; VPP; virtual power plant; microgrid; virtual impedance; decentralized control

PL

kontrola spadku częstotliwości zasilania; elektrownia wirtualna; mikrosieci; wirtualna impedancja; zdecentralizowana kontrola

• Wydawca: Polska Akademia Nauk, Wydział IV Nauk Technicznych
• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2021
• Tom: Vol. 69, nr 1
• Strony: art. no. e136190
• Opis fizyczny: Bibliogr. 39 poz., rys.

Twórcy

autor

Khanjanzadeh Amir

• Electrical and Computer Engineering Department, Science and Research Branch, Islamic Azad University, Tehran, Iran

autor

Soleymani Soodabeh

• Electrical and Computer Engineering Department, Science and Research Branch, Islamic Azad University, Tehran, Iran

autor

Mozafari Babak

• Electrical and Computer Engineering Department, Science and Research Branch, Islamic Azad University, Tehran, Iran

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).