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Inverter and control method and control device thereof

A control method and inverter technology, applied in the electrical field, can solve the problems of inverter shutdown, large starting current, and affecting the reliability of the load, so as to prevent shutdown and improve the load capacity

Active Publication Date: 2022-01-14
JIANGSU WANBANG DEHE NEW ENERGY TECH CO LTD
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Problems solved by technology

[0003] In related technologies, in order to prevent equipment damage due to overcurrent when the inverter is working, the inverter is generally designed with an overcurrent protection circuit. However, when an impact load is connected, due to the large starting current, it is easy to trigger the inverter. Overcurrent protection, causing the inverter to shut down, thereby affecting the reliability of the load

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  • Inverter and control method and control device thereof
  • Inverter and control method and control device thereof
  • Inverter and control method and control device thereof

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[0033] 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 making creative efforts belong to the protection scope of the present invention.

[0034] figure 1 is a flowchart of an inverter control method according to an embodiment of the present invention, such as figure 1 As shown, the method includes the following steps:

[0035] S1, get the output current of the inverter I ac ,The output voltage V ac , DC bus voltage V bus .

[0036] Specifically, such as figure 2 As shown, the output end of the DC power supply is connected to the DC bus of the inverter. The inverter can convert the DC p...

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Abstract

The invention provides an inverter and a control method and a control device thereof, and relates to the technical field of electrics. The method comprises the steps of obtaining the output current, the output voltage and the DC bus voltage of the inverter; judging whether the output current is greater than or equal to an overcurrent protection threshold or not; if so, controlling the inverter to stop working; if not, further judging whether the output current is greater than or equal to a cycle-by-cycle current limiting threshold value or not; if so, controlling the inverter to work in a cycle-by-cycle current limiting mode; and if not, adjusting the duty ratio of the PWM signal input to the inverter according to the output voltage, the DC bus voltage and the output current. The working mode of the inverter is adjusted in real time according to the working parameters of the inverter, the starting current when the impact load is connected can be limited, the inverter is prevented from being shut down due to overcurrent protection, the load capacity of the inverter is further improved, and meanwhile, the inverter can adapt to direct-current buses with different dynamic response characteristics.

Description

technical field [0001] The invention relates to the field of electrical technology, and in particular to an inverter control method, an inverter control device and an inverter. Background technique [0002] Inverters have a wide range of applications. For example, in power grids, in order to ensure power supply to loads during power outages, an energy storage system is generally installed. The energy storage power supply (DC power supply) passes through a DC conversion circuit, and then passes through an inverter to obtain AC power and supplied to the load. [0003] In related technologies, in order to prevent equipment damage caused by overcurrent when the inverter is working, the inverter is generally designed with an overcurrent protection circuit. However, when an impact load is connected, due to the large starting current, it is easy to trigger the inverter Overcurrent protection causes the inverter to shut down, which affects the reliability of the load. Contents of...

Claims

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Application Information

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IPC IPC(8): H02H7/12H02M1/32H02M7/5395H02M7/48
CPCH02H7/1227H02M1/32H02M7/5395H02M7/48
Inventor 陈申胡亚腾朱选才俞新
Owner JIANGSU WANBANG DEHE NEW ENERGY TECH CO LTD
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