Adaptive pi adjustment method
An adjustment method and self-adaptive technology, applied in the direction of output power conversion devices, electrical components, etc., can solve problems such as output lag, insufficient rigidity of large loads, system adjustment fluctuations, etc., and achieve fast response and good results
Active Publication Date: 2020-05-22
上海精泰技术有限公司
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Problems solved by technology
[0003] In the application of power electronic converters at the present stage, system adjustment fluctuations caused by factors such as power supply, load characteristics, and system interference are generally encountered; It is easy to have insufficient rigidity, output lag, and slow adjustment when loading
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[0043] The following is attached Figure 1 to 5 The given examples further illustrate the specific implementation of the adaptive PI adjustment method of the present invention. The adaptive PI adjustment method of the present invention is not limited to the description of the following embodiments.
[0044] The adaptive PI adjustment method of the present invention includes the following steps:
[0045] Step 1: Obtain feedback current I'by sampling the output current in real time, and compare it with the set target current I * Compare the real-time current instantaneous value error between the two Setting error Err required for adaptive PI adjustment through parameter setting * , Real-time current instantaneous value error Err′ and setting error Err * Compare and judge whether the target current is reached;
[0046] Step 2: Calculate the integration step KiStep of the next interrupt cycle through the integration step KiStep' of the current interrupt cycle * ;
[0047] Step three, cha...
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An adaptive PI regulation method, including the following steps: Step 1, obtain the feedback current I' by sampling the output current in real time, and compare it with the set target current I * Comparing the real-time current instantaneous value error between the two, the real-time current instantaneous value error Err' and the setting error Err * Compare and judge whether the target current is reached; step 2, calculate the integration step KiStep of the next interruption period through the integration step KiStep′ of the current interruption period * ; Step 3, set the updated integral step KiStep * accumulated to the actual integral gain K i , the integral gain K i Output to the PI regulator for current closed-loop control; step 4, after multiple cycles of PI regulation, when the real-time current instantaneous value error Err′≤setting error Err * , the target current regulation is completed. The self-adaptive PI adjustment method of the invention has fast response and good effect.
Description
Technical field [0001] The invention relates to the field of low-voltage electrical appliances, in particular to an adaptive PI adjustment method. Background technique [0002] The subject of power electronics mainly studies new power electronic devices, electric energy conversion and control, power sources, power transmission and its automation and other theoretical technologies and applications. It relies on power semiconductor devices such as thyristors to achieve high-performance power conversion. [0003] In the application of power electronic converters at this stage, generally, system adjustment fluctuations caused by factors such as power supply, load characteristics, system interference, etc. will be encountered; for a specific system, when its output characteristics meet the occasion of small load, its adjustment is large. Insufficient rigidity, output lag, and slow adjustment are prone to occur during load. Summary of the invention [0004] The purpose of the present inv...
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IPC IPC(8): H02M1/00
CPCH02M1/00H02M1/0012
Inventor 张涛阮冬华陈爱华
Owner 上海精泰技术有限公司