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Energy storage converter control method and device for suppressing grid-connected current harmonics

A technology for energy storage converters and current harmonics, applied in harmonic reduction devices, AC networks to reduce harmonics/ripples, AC network load balancing, etc., can solve the problem of large harmonic influence on power grids, low power quality, etc. problems, to achieve the effect of improving power quality and suppressing the influence of harmonics

Inactive Publication Date: 2019-11-08
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology

[0005] The invention provides an energy storage converter control method and device for suppressing grid-connected current harmonics, so as to solve the problems of large influence of grid harmonics and low power quality under the current state of new energy grid-connected operation

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  • Energy storage converter control method and device for suppressing grid-connected current harmonics
  • Energy storage converter control method and device for suppressing grid-connected current harmonics
  • Energy storage converter control method and device for suppressing grid-connected current harmonics

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[0039] Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.

[0040] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or over...

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Abstract

The invention provides an energy storage converter control method for suppressing grid-connected current harmonics, comprising: determining real-time grid-connected current harmonics and a real-time current harmonic tracking error; when the change trend of the grid-connected current harmonic tracking error satisfies a first condition, generating a control command by a hysteresis controller so thatthe current harmonics at a grid-connected node connected to the energy storage converter are suppressed; when the change trend of the grid-connected current harmonic tracking error satisfies a secondcondition, generating a control command by a multi-frequency controller so that the current harmonics at a grid-connected node connected to the energy storage converter are suppressed. The energy storage converter control method for suppressing grid-connected current harmonics, the seamless switching multi-frequency control method and the hysteresis control method effectively suppress the harmonic influences of new energy power generation in a grid-connected operation state, and improve the quality of power.

Description

technical field [0001] The present invention relates to the technical field of grid-connected new energy power generation, and more specifically, to an energy storage converter control method and device for suppressing grid-connected current harmonics. Background technique [0002] In recent years, new energy power generation technologies represented by wind power generation and photovoltaic power generation have been rapidly developed and vigorously promoted. On the one hand, the environmental friendliness and recycling of scenery help to deal with the energy crisis and environmental pollution; on the other hand, people have also noticed that the output power of new energy power generation has a strong randomness due to the limitation of natural conditions. And volatility, the integration of large-scale new energy into the power grid will have a serious impact on the quality of power supply in the existing power system. [0003] Harmonics will cause harm to the public powe...

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Application Information

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IPC IPC(8): H02J3/38H02J3/01H02J3/32
CPCH02J3/01H02J3/32Y02E40/40
Inventor 牛萌李建林修晓青孟高军靳文涛李蓓马会萌谢志佳徐少华闫涛
Owner CHINA ELECTRIC POWER RES INST
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