Tehnički vjesnik, Vol. 22 No. 5, 2015.
Izvorni znanstveni članak
https://doi.org/10.17559/TV-20150806095651
Investigation of the stability of the anti-islanding detection in multi-DGs system
Weihua Chen
; Liaoning Technical University, Liaoning Huludao 125105, China
Xiaoheng Yan
; Liaoning Technical University, Liaoning Huludao 125105, China
Jishen Pen
; Liaoning Technical University, Liaoning Huludao 125105, China
Zhongjian Zhao
; China Petroleum Liaohe Equipment Company, Liaoning Panjin 124000, China
Sažetak
This paper presents an improved model of multi-DGs microgrids for analysing system stability during grid-connections. The DGs-in the system are equipped with the Sandia frequency shift (SFS) scheme as an anti-islanding protection technique. By introducing a distribution network line length, SFS positive feedback gain and distributed power supply, power output parameters to improve the micro power grid mathematical model are established in three kinds of parameters and the relationship between micro power grid stability margin, to obtain stability of the system of power line length threshold, and stability of the distributed power dc output voltage threshold. This process allows the designers and engineers of renewable energy systems to optimize the system and ensure stability. Finally, in view of the several common simulation validations, this paper puts forward an improved model that can affect actual implementation of distributed micro power grid analysis, whereby the stability of the system parameters’ critical threshold may be deduced. Based on these case studies, system stability is shown to be very important to the stability of many distributed multi-DGs microgrids, which are useful for the design and implementation of new energy systems.
Ključne riječi
anti-islanding zaštita; granične vrijednosti; mikrorešetka multi-DGs; parametri sustava; Sandia frequency shift; stabilnost sustava
Hrčak ID:
147277
URI
Datum izdavanja:
22.10.2015.
Posjeta: 2.633 *