Harmonic suppression static quantity output control method for single-phase electric system
A harmonic suppression and output control technology, applied in the direction of irreversible DC power input conversion to AC power output, output power conversion device, electrical components, etc., can solve the problems of signal amplitude attenuation, control performance deterioration, etc.
Active Publication Date: 2020-12-08
四川科陆新能电气有限公司
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[0006] The main purpose of the present invention is to provide a harmonic suppression static quantity output control method for single-phase electric system, aiming to solve the problem of single-phase system existing in the prior art due to signal amplitude attenuation and distortion caused by transformation, resulting in poor control performance technical issues
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[0041] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0043] The invention proposes an embodiment.
[0044] Such as figure 1 As shown, in this embodiment, a static quantity output control method for harmonic suppression for a single-phase electric system specifically includes the following steps: 1. Collecting data on voltage and current
[0045] 2. Single-...
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The invention discloses a harmonic suppression static quantity output control method for a single-phase electric system, which adopts a DQH control mode, adopts static coordinate system control on fundamental wave components, and comprises the following steps: firstly, performing fundamental wave and harmonic separation on voltage and current signals, extracting fundamental waves by a traditionalinstantaneous value power method, and requiring additional low-pass filtering in the presence of harmonic input; harmonic wave extraction is carried out by utilizing a resonator, then fundamental waves are solved, only D and Q conversion is carried out on fundamental wave components, the influence of harmonic wave input on static quantity in actual control is avoided, and in order to stabilize a system and suppress harmonic waves, the harmonic components are independently controlled. Current is respectively controlled on the D axis and the Q axis under a static coordinate system, accurate static-error-free output can be achieved, and compared with conventional direct control, due to the fact that no extra static error elimination loop is arranged, the dynamic response capacity is higher. The objective of the invention is to solve the technical problem of poor control performance caused by signal amplitude attenuation and distortion generated by conversion of a single-phase system in the prior art.
Description
technical field [0001] The invention relates to the technical field of automatic control of power electronics, in particular to a static quantity output control method for harmonic suppression used in a single-phase electric system. Background technique [0002] Due to the development of modern industry and technology, inverter power supply is used more and more in household electricity, vehicle electricity, mobile power supply, etc. Many users no longer use the AC power provided by the large power grid as the power supply, but It is converted through various power conversions to obtain a more stable and reliable form of electric energy. Usually, the DC power is converted into AC power to supply the load. Various inverters have appeared, such as modified wave inverters, sine wave inverters, and square wave inverters. There are many types and wide application fields. Both performance and price have their pros and cons. Therefore, high-performance inverters have become a hot...
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IPC IPC(8): H02M1/12H02M7/42
CPCH02M1/12H02M7/42Y02E40/40
Inventor 邹军周萧郭鹏亮张自学
Owner 四川科陆新能电气有限公司