A coordinated frequency control strategy for photovoltaic system in microgrid. Issue 1 (1st January 2018)

• Record Type: Journal Article
• Authors: Lyu, Xue; Xu, Zhao; Zhao, Jian
• Is Part Of: Journal of International Council on Electrical Engineering. Volume 8:Issue 1(2018)
• Page Start: 37
• Page End: 43
• Publication Date: 2018-01-01
• Subjects: Photovoltaic system -- inertia response -- deloading control -- islanded microgrid -- frequency control; Electrical engineering -- Periodicals; Electrical engineering; Periodicals; 621.3
• DOI: 10.1080/22348972.2018.1470295
• Languages: English
• ISSNs: 2233-5951

Abstract

Abstract: This paper proposes a coordinated DC-link voltage control and deloading control for two-stage PV system to offer frequency support in an islanded microgrid without energy storage system(ESS). The energy stored in the DC-link capacitor is utilized to emulate inertia response, which has an important implication on enhancing system inertia, since PV systems are equipped with power-electronic converter and have no natural inertia response. At the same time, a certain of power margin is reserved by increasing dc voltage of PV array, which provides PV system the ability to participate in primary frequency control. Simulations are conducted in DIgSILENT/ PowerFactory and results show that the proposed strategy is effective in improving the dynamic behavior of system frequency.