Inverter bus voltage adjusting method and device, controller and storage medium

A bus voltage and adjustment method technology, applied in control/regulation systems, output power conversion devices, irreversible DC power input conversion to AC power output, etc., can solve the problem of not being able to obtain accurate and reasonable output bus voltage, reduce inverse Transformer inverter efficiency and other issues to achieve the effect of improving inverter efficiency and grid connection efficiency

Pending Publication Date: 2021-12-07
BYD CO LTD
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Problems solved by technology

[0005] The embodiment of the present invention provides an inverter bus voltage adjustment method, device, controller and storage mediu

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  • Inverter bus voltage adjusting method and device, controller and storage medium
  • Inverter bus voltage adjusting method and device, controller and storage medium
  • Inverter bus voltage adjusting method and device, controller and storage medium

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[0043] Next, the technical solutions in the embodiments of the present invention will be described in conjunction with the drawings of the embodiments of the present invention, and it is clear that the described embodiments are intended to be in an embodiment of the invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained without creative labor are not made in the premise of creative labor.

[0044] This embodiment provides a method for adjusting the bus voltage inverter, the method can be applied to the inverter controller, the inverter controller based on the maximum duty cycle of the inverter, the inverter grid peak voltage and output current, obtaining bus voltage estimate, the estimated value of the bus voltage and the dynamic analysis of real-time adjustment process, the target bus voltage determines the current time, and then based on the target bus voltage at the current time in the duty ratio of the inverter ...

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Abstract

The invention discloses an inverter bus voltage adjusting method and device, a controller and a storage medium. The method comprises the following steps: acquiring the maximum duty ratio of an inverter, the peak voltage of a power grid and the inversion output current; obtaining a bus voltage estimation value based on the maximum duty ratio of the inverter, the power grid peak voltage and the inversion output current; performing adjustment processing on the bus voltage estimation value, and determining a target bus voltage; and adjusting the duty ratio of a DC/DC converter in the inverter based on the target bus voltage, so that the output bus voltage is consistent with the target bus voltage. According to the technical scheme, the output bus voltage of the inverter is adjusted to be consistent with the target bus voltage, the obtained accurate and reasonable output bus voltage can be stably output, and the inversion efficiency of the inverter is improved.

Description

technical field [0001] The invention relates to the field of inverters, in particular to an inverter bus voltage adjustment method, device, controller and storage medium. Background technique [0002] In photovoltaic power generation or energy storage systems, the grid-connected inverter usually adopts a two-stage structure, the front stage is a DC / DC converter, and the latter stage is an inverter circuit. The DC / DC converter needs to control the output bus voltage above the voltage required by the inverter circuit according to the preset bus voltage reference value, so that the inverter circuit can output the output bus voltage to the grid, but too high output bus voltage It will reduce the efficiency of the grid-connected inverter. [0003] In the prior art, VBUS=Vmax+α(Vout)+β(Iout), wherein VBUS is the estimated bus voltage, Vmax is the grid peak voltage, Vout is the grid voltage, Iout is the inverter output current, and α(Vout) is Grid voltage increment, β(Iout) is th...

Claims

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Application Information

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IPC IPC(8): H02M7/48H02M3/156H02J3/38
CPCH02M7/48H02M3/156
Inventor 尹韶文尹雪芹翁宏达黄伟尹继波
Owner BYD CO LTD
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