A Mitigation Method of Current Harmonic
A current harmonic and current technology, which is applied in the field of current harmonic mitigation, can solve problems affecting the power quality of distribution network and power quality pollution of public power grid, and achieve the effects of small harmonics, fast adjustment speed and improved reliability
Active Publication Date: 2021-11-26
HANGZHOU ELECTRIC EQUIP MFG +2
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Problems solved by technology
[0002] With the development of power electronics technology, nonlinear power electronic devices and devices have been widely used in modern industry, and, due to a large number of nonlinear power electronic devices and devices connected to the power grid, current harmonics have gradually become an important factor affecting the power distribution network. The mainstream problem of quality has caused serious pollution to the power quality of the public grid
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[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. 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.
[0038] The purpose of the present invention is to provide a mitigation method for current harmonics, which can alleviate the impact of current harmonics on power quality.
[0039] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0040] figure 1...
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The invention discloses a mitigation method for current harmonics. Based on a static synchronous compensator, when current harmonics exist in a power transmission line, the mitigation method can be based on the current of a three-phase nonlinear load and based on instantaneous reactive power The power theory calculates the reference value of the compensation current corresponding to the three-phase nonlinear load current, and after calculating the control current, it can also use the control current to generate the modulation angle, and finally inject the compensation current corresponding to the modulation angle into the transmission line, which can Block current harmonics from being transmitted in the transmission line, so as to alleviate the influence of current harmonics on power quality. Moreover, because the static synchronous compensator has the advantages of small harmonics, wide operating range, high reliability and fast adjustment speed, this mitigation method is based on the static synchronous compensator, which can improve its own reliability, response speed and applicability.
Description
technical field [0001] The invention relates to the field of power quality, in particular to a mitigation method for current harmonics. Background technique [0002] With the development of power electronics technology, nonlinear power electronic devices and devices have been widely used in modern industry, and, due to a large number of nonlinear power electronic devices and devices connected to the power grid, current harmonics have gradually become an important factor affecting the power distribution network. The mainstream problem of quality has caused serious pollution to the power quality of the public grid. For example, the diode rectifier circuit, which has the advantages of simple structure and low cost, is the most widely used, and the problem of harmonic pollution to the power grid is also the most serious. [0003] But on the other hand, with the advancement of modern science and technology, various complex, sophisticated, and power-quality-sensitive electrical e...
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IPC IPC(8): H02J3/01
CPCH02J3/01Y02E40/10Y02E40/40
Inventor 高俊青沈凯李中华李题印屠永伟姚海燕缪宇峰
Owner HANGZHOU ELECTRIC EQUIP MFG