Island detection method, equipment and system of distributed power generation system
A technology of distributed power generation and island detection, which is applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve the problems of island detection in distributed power generation systems with multiple inverters, and achieve the purpose of adjusting the power quality of the power grid and reducing the deviation The effect of shifting the amount
Active Publication Date: 2018-03-06
NORTH CHINA ELECTRICAL POWER RES INST +4
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[0005] In order to solve the problem that the existing islanding detection technology cannot perform islanding detection on a multi-inverter distributed power generation system, the present invention provides an islanding detection method, device and system for a distributed power generation system. Send a pseudo-random disturbance signal to multiple inverters, receive the offset returned by the inverter, and output the detection result according to the offset and the preset offset threshold to realize distributed power generation for multiple inverters System Islanding Detection
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[0050] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0051] Those skilled in the art know that the embodiments of the present invention can implement a system, device, device, method or computer program. Therefore, the present invention can be implemented in the form of complete hardware, complete software (including firmware, resident software, microcode, etc.), or a combination of hardware and software.
[0052] In addition, any number of elements in the drawings is used for illustration rather tha...
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The invention provides an island detection method, equipment and system of a distributed power generation system, and relates to the technical field of island detection. The island detection method comprises the steps of sequentially sending pseudorandom disturbance signals to a plurality of inverters in a distributed power generation system according to preset time intervals; receiving offset returned by the inverters according to the received pseudorandom disturbance signals; acquiring a preset offset threshold; and outputting a detection result according to the offset and the preset offsetthreshold. With the island detection method, equipment and system of the distributed power generation system, provided by the invention, island detection of the multi-inverter distributed power generation system can be achieved.
Description
technical field [0001] The present invention relates to the technical field of island detection, in particular to an island detection method, device and system for a distributed power generation system. Background technique [0002] Today's society has higher and higher requirements for the quality, safety and reliability of power supply. The centralized power supply system, which is mainly characterized by large units, large power grids and high voltage, cannot meet the requirements due to its own defects. At present, a combination of centralized power supply system and distributed power generation system is adopted, and smaller generator sets (generally less than 30MW) are arranged at the user site or near the power consumption site, which can not only meet the needs of specific users, but also improve power generation. Supply quality and safety reliability. [0003] However, when the centralized power supply system stops supplying power, if the distributed power generati...
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IPC IPC(8): H02J3/38
CPCH02J3/381H02J3/388
Inventor 曹天植罗玮檀政苗友忠徐鹏雷为民岳云力李顺昕郝婧王晓斐李博
Owner NORTH CHINA ELECTRICAL POWER RES INST