Three-phase unbalance degree detection method and device based on convolution window function
A detection method and a balance degree technology are applied in the field of three-phase unbalance degree detection and device based on convolution window function, which can solve the problems of slow calculation speed, low detection accuracy, spectrum leakage and fence effect, etc., and achieve a good frequency spectrum. Leakage, improve detection accuracy, and suppress the effect of spectrum leakage
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Embodiment 1
[0055] Three-phase unbalance detection method based on convolution window function
[0056] Such as figure 2 As shown, the three-phase unbalance detection method based on the convolution window function includes the following steps:
[0057] Step 1: Establish the corresponding relationship between phase sequence components and voltage fundamental components.
[0058] First, establish a voltage single-phase signal model.
[0059] Assuming that the voltage signal contains H harmonics, the sampling frequency f s After sampling the single-phase signal, we get:
[0060]
[0061] In the formula, A h Indicates the voltage amplitude of each harmonic of the signal, f h Indicates the frequency of each harmonic, f s Indicates the signal sampling frequency, Φ h Indicates the phase of each harmonic of the signal.
[0062] The detection of three-phase unbalance is divided into two stages. On the basis of detecting the voltage fundamental component, the symmetrical component meth...
Embodiment 2
[0168] Three-phase unbalance detection device based on convolution window function and partition method
[0169] The detection device includes a memory and a processor, and a computer program is stored on the memory, and the computer program executes the above method when run by the processor. A computer program includes computer program code, which may be in the form of source code, object code, executable file, or some intermediate form, etc.
[0170] Memory includes any entity or device capable of carrying computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signals, telecommunication signals, and software distribution media, etc.
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