An island protection method and system with island fault ride-through capability
A fault ride-through and isolated island technology, applied in wind power generation, AC network circuits, electrical components, etc., to achieve the effects of increasing service life, reducing heat dissipation, and balancing redundant power
Active Publication Date: 2022-05-10
GUANGDONG POWER GRID CO LTD
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Problems solved by technology
[0004] The purpose of the present invention is to provide an island protection method and system with island fault ride-through capability, so as to solve the problem that the existing island protection can only deal with the island working condition by shutting down after detecting that the wind turbine has entered the island state
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[0048]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0049] It should be understood that the step numbers used herein are only for convenience of description, and are not intended to limit the order in which the steps are performed.
[0050] It should be understood that the terminology used in the description of the present invention is for the purpose of describing particular embodiments only and is not intended to limit the present invention. As used in this specification and the appended claims, the singular forms ...
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The invention discloses an island protection method and system with island fault ride-through capability, and relates to the technical field of wind power generation. The method includes: performing island detection according to the real-time information of the wind turbine network side, and judging whether the wind turbine is in an island state; Should enter the island fault ride-through mode, change the control model of the wind turbine, adopt the island fault ride-through control strategy, enter the island fault ride-through mode; judge whether the wind turbine has returned to the grid-connected state according to the real-time information of the wind turbine grid side, and determine the island protection Should action be taken. The invention can enable the wind turbine to pass through temporary island faults under the premise of ensuring its own safety, effectively balance the redundant power of the wind turbine, adjust the output of the wind turbine in time, reduce the heat dissipation of the energy-consuming device, and increase the service life.
Description
technical field [0001] The invention relates to the technical field of wind power generation, in particular to an island protection method and system with island fault ride-through capability. Background technique [0002] At present, the offshore wind power grid connection scheme mostly adopts the centralized connection mode with the wind farm group as the unit, which can reduce the engineering cost and improve the control ability of the power grid to connect to the wind farm. Compared with the wind farms, the economic and technical advantages Distributed access has obvious advantages. The transmission mode adopted for offshore wind power grid connection usually adopts high-voltage AC transmission or flexible DC transmission, and different transmission modes are adopted according to the distance from the offshore wind farm. The advantages of high-voltage AC transmission lie in its mature technology and low price. However, due to the limitation of charging power, the transm...
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IPC IPC(8): H02J3/38
CPCH02J3/388H02J2300/28H02J2203/20Y02E10/76
Inventor 余浩任万鑫彭穗陈鸿琳张哲萌左郑敏宫大千张章亮许亮段瑶
Owner GUANGDONG POWER GRID CO LTD