Single-phase frequency self-adaptive genlock system having pre-filtering function

Abstract

Disclosed is a single-phase frequency self-adaptive genlock system having a pre-filtering function. The single-phase frequency self-adaptive gunlock system comprises an orthogonal signal generator based on a first-order complex integrator, a plurality of first-order complex integrator cascade units and a frequency self-adaptive controller which are connected in sequence. An input end of the orthogonal signal generator based on the first-order complex integrator is connected with a power grid voltage sampling signal. An output end of the frequency self-adaptive controller constitutes the output end of the system, and outputs frequency information of the power grid voltage sampling signal. Meanwhile, the output end of the frequency self-adaptive controller also feeds back the outputted frequency information of the power grid voltage sampling signal to the orthogonal signal generator based on the first-order complex integrator and the plurality of first-order complex integrator cascade units. The invention achieves the virtual orthogonal voltage reconstruction, effectively eliminates the impacts brought by DC noises mixed in sampling power grid voltage, can suppress the harmonics in the sampling signal, and the frequency self-adaptive controller eliminates the impacts of the power grid amplitude change on the frequency adjustment dynamic response speed.

Description

technical field [0001] The invention relates to a genlock system. In particular, it relates to a single-phase frequency adaptive genlock system with pre-filtering function. Background technique [0002] Considering the many strong advantages of new renewable energy, such as clean, pollution-free and abundant reserves, the development of new renewable alternative energy and the improvement of clean power supply will, in the long run, be beneficial in terms of technological improvement, environmental protection, and economic development. have substantial promotional significance. [0003] The distributed power generation system developed from dominant renewable energy such as solar energy and wind energy aims to provide users with high-quality, clean and efficient power resources. In order to realize the reliable operation of the distributed grid-connected power generation system, it needs to be equipped with strong and stable technical support. Since the genlock technology...

AI Technical Summary

Problems solved by technology

However, the unification of the above three capabilities has not been realized in the traditional genlock structure

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