NDLI: An intentionally seamless transfer strategy between grid-connected and islanding operation in micro-grid

Content Provider	IEEE Xplore Digital Library
Author	Wu, Shunyu Liu, Shirong Chen, Xueting Zheng, Lingwei Zhu, Jian
Copyright Year	2014
Description	Author affiliation: School of Automation, Hangzhou Dianzi University, Hangzhou, Zhejiang 310018, China (Wu, Shunyu; Liu, Shirong; Chen, Xueting; Zheng, Lingwei; Zhu, Jian)
Abstract	Micro-grid is a regional power system, which contains several distributed energy resources (DERs). It can effectively respond to the dispatching from the utility grid. Generally, micro-grid can operate in parallel with the utility grid or operate in islanding mode. In this paper, the intentionally seamless transfer strategy is studied in a grid-connected micro-grid in PSCAD/EMTDC, which contains PV system, microturbine generation system (MTGS) and battery system. In grid-connected operation mode, power flow following control system is adopted to keep the active power of the point of common coupling (PCC) at a constant level. In this control mode, the inverter system for each controllable distributed generation (DG) usually works in P/Q control mode. When PCC in micro-grid is cut off, state tracking control strategy is adopted and battery system in micro-grid must switch to V/f control mode to stabilize voltage and frequency. Due to the power transient fluctuations caused by the unbalanced demands form local loads, the power following control system with the state tracking strategy is employed to minimize the transient fluctuations of voltage and frequency during the transferring process of the operation mode. Effectiveness of the control strategy is validated by simulations.
Starting Page	302
Ending Page	307
File Size	851925
Page Count	6
File Format	PDF
ISBN	9781479951628
DOI	10.1109/ICEMS.2014.7013496
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-10-22
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Control systems Batteries Transient analysis Inverters Voltage control Frequency control Islanding
Content Type	Text
Resource Type	Article

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