Broadband Harmony Honesty Coordination Links Direction Method and Device
A technology of damping current and current control, which is applied in harmonic reduction devices, circuit devices, and AC networks to reduce harmonics/ripples, etc., to achieve the effects of ensuring gradual stability, improving robustness, and reducing chattering
Active Publication Date: 2022-02-01
XIANGTAN UNIV
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Problems solved by technology
However, the "prerequisites" for the coordinated damper to effectively control broadband harmonic resonance are: 1) the harmonic components of the grid-connected current must be accurately extracted; 2) the active damping inverter output phase voltage must be tracked stably, accurately, and quickly Network harmonic current
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[0043] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0044] In the description of the present invention, the meaning of several means one or more, and the meaning of multiple means two or more than two. Greater than, less than, exceeding, etc. are understood as not including the original number, and above, below, within, etc. are understood as including the original number . If the description of the first and second is only for the purpose of distinguishing the technical features, it cannot be understood as indicating or implying the relative importance or implicitly indicating the number...
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The invention discloses a broadband harmonic resonance coordinated damping robust current control method and device, wherein the method includes: S100, collecting three-phase damped current and three-phase grid-connected current, according to the harmonic of the grid-connected current The component obtains the damping current reference, and then obtains the tracking error signal of the damping current; S200, according to the tracking error signal, obtains the real-time value of the sliding surface function, dynamically updates the switching gain observation value based on the adaptive law model, and based on The control law model with perturbation parameters obtains an output control signal; S300, modulates the output control signal through a three-phase pulse width modulation module, outputs six driving pulses, and drives the gate of the IGBT of the active damping inverter component. The invention ensures the progressive stability of the control system, reduces the chattering of the control input signal, improves the robustness of the control system, and enables the coordination damper to effectively control the broadband harmonic resonance.
Description
technical field [0001] The invention relates to an intelligent power distribution system, in particular to a broadband harmonic resonance coordinated damping robust current control method and device. Background technique [0002] There are a large number of power electronic interface devices in renewable energy power generation systems (such as large microgrids, wind farms, and photovoltaic power plants). On the one hand, there is broadband impedance coupling between them and the distribution network, which is easy to generate low harmonic impedance channels, thereby causing potential broadband harmonic resonance factors; on the other hand, the broadband and high-order harmonics emitted by these power electronic interface devices When the current propagates on the long-distance medium and high voltage transmission lines, it may also cause the characteristic subharmonic current to exceed the standard due to the influence of the distribution parameters of the transmission line...
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IPC IPC(8): H02J3/00H02J3/01H02J3/38
CPCH02J3/002H02J3/01H02J3/38H02J3/381H02J2203/10H02J2203/20Y02E40/40
Inventor 陈智勇龙宏涛胡毕华肖军邓文浪谭平安盘宏斌易灵芝陈才学
Owner XIANGTAN UNIV