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Low-voltage ride-through simulation system of wind power generation set and application method of low-voltage ride-through simulation system

A technology of low-voltage ride-through and wind turbines, applied in wind power generation, single-network parallel feed arrangement, etc., can solve the problems of little improvement in low-voltage ride-through capability and shrinking of reactive power

Inactive Publication Date: 2016-06-15
STATE GRID CORP OF CHINA +1
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  • Abstract
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Problems solved by technology

However, capacitor compensation is passive compensation. When the power grid encounters voltage instability, the reactive power provided by the capacitor will be greatly reduced, which will have little effect on improving the low voltage ride-through capability.

Method used

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  • Low-voltage ride-through simulation system of wind power generation set and application method of low-voltage ride-through simulation system
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  • Low-voltage ride-through simulation system of wind power generation set and application method of low-voltage ride-through simulation system

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Embodiment Construction

[0020] 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 making creative efforts belong to the protection scope of the present invention.

[0021] The invention provides a wind turbine low voltage ride through simulation system, such as figure 2 shown, including:

[0022] A simulated power system 21 established by a real-time digital simulator RTDS, the simulated power system 21 is used to simulate a wind turbine 211 connected to the power grid 215 through a transformer 212, an AC bus 213 and a power transmission line 214, wherein the power transmission line 214 is connected to the grid 215 Ther...

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Abstract

The invention provides a low-voltage ride-through simulation system of a wind power generation set and an application method of the low-voltage ride-through simulation system. The simulation system comprises a simulation power system and a static var generator (SVG), wherein the simulation power system is built by using a real time digital system (RTDS) and is used for simulating the wind power generation set connected to a power grid through a transformer, an AC bus and a power transmission circuit, the power transmission circuit is provided with a short-circuit fault point, a grounding resistor is connected to the short-circuit fault point, and the SVG is connected to the AC bus of the simulation power system. By the low-voltage ride-through simulation system, the low-voltage ride-through capability of the system is inspected on the condition of no influence on the running of the real power system, whether the SVG is needed to be additionally arranged is determined to assist the system to improve the low-voltage ride-through capability, the required output capacity of an SVG device is determined, and thus, a reliable basis is provided for a situation that the SVG is additionally arranged in the real power system to improve the low-voltage ride-through capability.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a low-voltage ride-through simulation system for a wind turbine and a method for using the same. Background technique [0002] With the expansion of scale and number of grid-connected wind farms, the problem of voltage stability in power systems has gradually become prominent. The "Technical Regulations for Connecting Wind Farms to the Power Grid" (GB / T19963-2011) stipulates the low voltage ride-through capability of wind turbines, that is, when the power system accident or disturbance causes the voltage drop at the grid connection point, within a certain voltage drop range and time interval inside (such as figure 1 The upper area of ​​the voltage curve shown), the wind turbines / wind farms can ensure continuous operation without going out of the grid. [0003] However, at present, the technical level of wind turbines in the power grid is uneven, and the low-voltag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38
CPCY02E10/76
Inventor 金海峰王丰吴涛梁玉枝李善颖
Owner STATE GRID CORP OF CHINA
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