Inverter, control method and control device thereof
A control method and inverter technology, applied in the field of inverters and inverter control devices, can solve the problems of large starting current, shutdown of the inverter, affecting the reliability of load operation, etc., so as to improve the load capacity, The effect of preventing shutdown
Active Publication Date: 2022-04-19
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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[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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The invention provides an inverter and its control method and control device, which relate to the field of electrical technology. The method includes: obtaining the output current, output voltage, and DC bus voltage of the inverter; judging whether the output current is greater than or equal to the overcurrent protection threshold ; If yes, then control the inverter to stop working; if not, further judge whether the output current is greater than or equal to the cycle-by-cycle current limit threshold; if yes, then control the inverter to work in cycle-by-cycle current limit mode; if not, then The duty cycle of the PWM signal input to the inverter is adjusted according to the output voltage, the DC bus voltage and the output current. The invention adjusts the working mode of the inverter according to the working parameters of the inverter in real time, which can limit the starting current when the impact load is connected, prevent the inverter from shutting down due to overcurrent protection, and further improve the efficiency of the inverter. The load capacity can also make the inverter adapt to DC 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...
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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