Patent
Island detection method of AFD (active frequency drift) based on synchronous rotation coordinate system
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The article was published on 2013-10-09. It has received 13 citations till now. The article focuses on the topics: Frequency drift & Coordinate system.read more
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Patent
Micro-grid islanding detection method
Huo Chunbao,Li Jinmao +1 more
TL;DR: In this article, a micro-grid islanding detection method is proposed, where the authors install a device node for implanting an improved active frequency drift method at a common connection point of a microgrid and a main grid; setting threshold values of voltage and frequency, injecting disturbing current with the disturbance factor of K0 into a system in real time, detecting the voltage UPCC and the frequency f of the common connected point, and judging that islanding happens when the voltage upCC or the frequency exceeds the threshold values; performing next discrimination if the voltage or frequency f does not
Patent
System and method for controlling a power generation system based on a detected islanding event
TL;DR: In this paper, a method for controlling the operation of a power generation system configured to supply power to an electrical grid may generally include detecting an occurrence of an islanding event associated with the power generator system and adjusting a regulator gain applied within a regulator of the generator system.
Patent
Energy feedback type distributed photovoltaic power inverter integrated test system
TL;DR: In this article, an energy feedback type distributed photovoltaic power inverter integrated test system consisting of a power electronic island and stimulated power grid alternating-current source, a wave recorder, a power analyzer and a client notebook computer is provided.
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Patent
Systems and methods for preventing islanding of grid-connected electrical power systems
TL;DR: A preferred embodiment of the electrical power system of the present invention includes a power conditioning unit which is configured to receive the DC electrical output signal to deliver an AC output signal in a grid-connected load.
Patent
Method for detecting islanding by frequency deviation applying pulse current interference
Juan Gu,Keman Lin,Mingyao Lin +2 more
TL;DR: In this article, a method for detecting islanding by frequency deviation applying pulse current interference, which comprises the steps of: selecting an AFD method of which the chopping rate is equal to 001 to perform small-range deviation on the frequency of a point of common coupling, if detecting that the voltage frequency exceeds the limit of OVP/UVP and OFP/UFP, performing anti-islanding protection, and aiming at completing islanding detection and disconnecting synchronization before high-speed reclosing.