一种交流逆变器出口信号的测量方法及装置
By using oversampling clocks of different frequencies to modulate voltage and current signals in the measurement of AC inverter output signals, and then performing digital filtering and extraction after multiplication, the problem of insufficient bandwidth in the existing technology is solved, and high-frequency information is preserved and the stability of measurement results is improved.
CN114859112BActive Publication Date: 2026-07-17HENAN HONGSHUO ELECTRIC CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HENAN HONGSHUO ELECTRIC CO LTD
- Filing Date
- 2022-06-08
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
The existing oversampling modulator has a low bandwidth in the analog-to-digital conversion process, which leads to the loss of high-frequency information in the AC inverter output signal and inaccurate measurement results.
Method used
Oversampling modulation of voltage and current signals is performed using oversampling clocks of different frequencies. After obtaining a 1-bit data stream, the data are multiplied and then processed by digital filtering to obtain active power data.
Benefits of technology
It improves the measurement bandwidth, retains high-frequency information, reduces the short-time correlation between voltage and current signals, and enhances measurement stability and accuracy.
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Abstract
本发明属于电力参数测量领域，具体涉及一种交流逆变器出口信号的测量方法及装置。本发明的方法是将经过过采样调制后包含高频信息的电压和电流1比特信号相乘，获取包含较大带宽的有效信息后，再进行数字滤波抽取，保证测量出的有功功率能够覆盖调制信号频带信息。并且，针对电压和电流两路信号，分别采用了不同的过采样调制频率，能够有效避免电压和电流比特数据流之间的短时相关性，降低有功功率低频干扰，提升测量输出的稳定度。经过模拟验证，本发明所测得的交流逆变器有功功率包含高频成分的电压电流信息，测量结果误差较小。
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