High-precision Harmonic Detection Technology Suitable For New Energy Access

With the rapid development and large-scale expansion of new power systems, ensuring power quality has become a significant challenge in grid design and operation. Power quality issues, such as voltage imbalance, frequency fluctuations, and harmonic distortion, pose direct threats to the safe and stable operation of the grid. These problems become even more complex and prominent with the large-scale integration of renewable energy sources. Therefore, developing a technology for accurate detection and verification of grid harmonics is crucial for improving grid reliability and the safety of power equipment. This paper proposes a high-precision co-frequency phasing measurement technique that uses an advanced co-frequency phasing algorithm and a third-order self-convolution Hanning window to effectively address signal distortion and spectrum leakage issues in traditional detection methods, providing strong technical support for the safe and stable operation of the power grid.