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

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...

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