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Power converter and control method thereof

A technology of power converter and control method, which is applied in the direction of output power conversion device, irreversible DC power input conversion to AC power output, single-network parallel feeding arrangement, etc., which can solve load power supply interruption and power converter shutdown protection, impact on customer experience, etc.

Pending Publication Date: 2021-11-02
SUNGROW POWER SUPPLY CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

[0002] The power converter in the microgrid system can operate both on-grid and off-grid, for example figure 1 As shown, when the power converter is running off-grid, the power supply supplies power to the load connected to the off-grid port through the power converter. However, when the load is overloaded, it is easy to cause the power converter to shut down for protection, resulting in interruption of power supply to the load and affecting customers. to experience

Method used

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  • Power converter and control method thereof
  • Power converter and control method thereof

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Embodiment Construction

[0028] 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.

[0029] see figure 2 , the embodiment of the present invention discloses a power converter control method, including:

[0030] Step S01: When the power converter is running off-grid with load, determine whether the load connected to the off-grid port is overloaded, if not, go to step S02; if yes, go to step S03.

[0031] Step S02: Use the rated load voltage as the voltage setting of the off-grid port output waveform control system for the off-grid port. Then...

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Abstract

The invention discloses a power converter and a control method thereof, which aim to avoid shutdown protection of the power converter under the condition of ensuring safe operation of a system when a load accessed to an off-network port is overloaded. The method comprises the following steps of when the power converter operates in an off-network loaded manner, judging whether a load accessed to an off-network port is overloaded or not, if not, taking the load rated voltage as an off-network port output waveform to control off-network port voltage setting of the system, and if yes, adding a control loop based on the overload degree to the off-network port output waveform control system, and taking the difference between the load rated voltage and the output of the control loop as off-network port voltage given.

Description

technical field [0001] The present invention relates to the technical field of power electronics, and more specifically, to a power converter and a control method thereof. Background technique [0002] The power converter in the microgrid system can operate both on-grid and off-grid, for example figure 1 As shown, when the power converter is running off-grid, the power supply supplies power to the load connected to the off-grid port through the power converter. However, when the load is overloaded, it is easy to cause the power converter to shut down for protection, resulting in interruption of power supply to the load and affecting customers. experience. Contents of the invention [0003] In view of this, the present invention provides a power converter and a control method thereof, so as to avoid shutdown protection of the power converter while ensuring safe operation of the system when the load connected to the off-grid port is overloaded. [0004] A method for contro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/42H02M1/32H02J3/38
CPCH02M7/42H02M1/32H02J3/388H02J2300/24Y02E10/56
Inventor 耿后来曹梦林李星马延亮程林
Owner SUNGROW POWER SUPPLY CO LTD
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