Control method and device for input signal of direct-current converter and storage medium
A DC converter and input signal technology, applied in the direction of converting DC power input to DC power output, output power conversion device, measuring device, etc., can solve the problem of large internal resistance error, reduce total harmonic distortion, improve The effect of accuracy
Pending Publication Date: 2022-05-17
SHINRY TECH
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Problems solved by technology
[0003] At present, a sinusoidal signal can be obtained by a proportional integral controller (PI controller) to measure the internal resistance of the fuel cell, but the sinusoidal signal obtained by the above method has a large total harmonic distortion (total harmonic distortion, THD), so Large errors in the measured internal resistance of the fuel cell
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[0041] In order to make the purpose, technical solution and advantages of the application clearer, the application will be further described below in conjunction with the accompanying drawings.
[0042] The terms "first" and "second" in the specification, claims and drawings of the present application are only used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally It also includes other steps or units inherent to these processes, methods, products, or devices.
[0043] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodimen...
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The embodiment of the invention provides a control method and device for input signals of direct-current converters and a storage medium, applied to a direct-current booster circuit, the direct-current booster circuit comprises N direct-current converters, and each direct-current converter is provided with an interface connected with a direct-current power supply and a load. The method comprises the following steps: acquiring an output signal of the DC converter; obtaining an error between a target output signal and the output signal, and determining a reference duty ratio according to the error; the duty ratio of the input signal of the DC converter is set as the reference duty ratio until the absolute value of the steady-state error of the DC booster circuit is less than a reference threshold value. According to the method provided by the invention, the proportional controller, the integral controller and the resonance controller are connected in parallel, the error between the set target output signal and the output signal of the direct-current converter is controlled, and the total harmonic distortion of the output signal is reduced.
Description
technical field [0001] The embodiments of the present application relate to the technical field of electronic circuits, and in particular to a method, device and storage medium for controlling an input signal of a DC converter. Background technique [0002] With the wide application of fuel cells, the internal resistance measurement of proton exchange membrane (PEM) has become a hot research direction of fuel cells. At present, the most widely used internal resistance test method is the AC impedance method, which injects a sinusoidal signal with a fixed frequency into the fuel cell, and analyzes the current and voltage of the fuel cell to obtain the internal resistance of the proton exchange membrane. [0003] At present, a sinusoidal signal can be obtained by a proportional integral controller (PI controller) to measure the internal resistance of the fuel cell, but the sinusoidal signal obtained by the above method has a large total harmonic distortion (total harmonic disto...
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Login to View More IPC IPC(8): H02M3/156H02M1/08H02M1/12G01R31/389
CPCH02M3/156H02M1/08H02M1/12G01R31/389Y02E60/50
Inventor 梁春刘鹏飞吴壬华
Owner SHINRY TECH