Wind turbine flickering simulation testing system and method based on virtual power grid simulation

Abstract

The invention belongs to the technical field of design and application of new energy grid-connected detecting systems, and particularly relates to a wind turbine flickering simulation testing system and a method based on virtual power grid simulation. The system comprises a current transformer, a data acquirer, an industrial personal computer or a PC (Personal Computer) and simulation software Matlab or LabVIEW for performing flickermeter simulation, wherein an output port of the current transformer is connected with a data interface of the industrial personal computer through the data acquirer; current signals (numbers) are equivalent to controllable voltage sources in a virtual power grid which is built by the industrial personal computer; and the voltage sources are processed as voltage flickering values by a simulation tester, and can correspond to report forms or patterns. The system and the method have the advantages of simple and reliable structure and strong practicability, are conducive to reducing hidden troubles which are brought by wind power integration to the power grid, can reduce equipment investments, and are simple in testing process and suitable for promotion and application.

Description

technical field [0001] The invention belongs to the technical field of design and application of new energy grid-connected detection systems, and in particular relates to a wind turbine flicker simulation test system and method based on virtual grid simulation. It is a wind power generation power quality detection device combined with virtual grid simulation, which can solve the problems of unit power quality testing and corresponding test analysis in the process of industrialization of large-scale wind turbine equipment. Background technique [0002] The ultimate purpose of measuring flicker required by the International Electrotechnical Standard IEC61400-21 is to evaluate the impact of wind turbines on the grid. The indicators for measuring flicker include short-term flicker value and long-term flicker value. The short-term flicker value is a value that reflects the strength of short-term flicker; the long-term flicker value is derived from the short-term flicker value an...

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Problems solved by technology

[0006] In order to overcome the shortcomings of the existing wind turbine flicker test process that is complicated and cannot be comprehensively and effectively tested, and the excessive error caused by the direct test of the flicker meter, the present invention provides a wind turbine flicker simulation test based on virtual grid simulation The system and method are capable of simulating the voltage fluctuation of a wind turbine through a virtual power grid, and can use the simulated signal as an input signal into a virtual flicker system to obtain an instantaneous flicker value, that is, a flicker visual sensitivity change curve

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