低压配电网中单相谐波检测方法研究  

Research on Single-phase Harmonic Detection Methods in Low-voltage Distribution Grids

作　　者：吕叶卿 鲍晴 钟少轩 LYU Yeqing;BAO Qing;ZHONG Shaoxuan(Zhongshan Power Supply Bureau of Guangdong Power Grid Co.,Ltd.,Zhongshan 524800)

机构地区：[1]广东电网有限责任公司中山供电局,广东中山524800

出　　处：《电力安全技术》2024年第8期38-44,共7页Electric Safety Technology

摘　　要：提出一种基于守恒功率理论的单相谐波检测方法,结合使用二阶广义积分器锁相环实现对电压基波分量的提取和谐波电压的抑制,该检测方法原理简单,结构清晰易实现。通过仿真验证了该检测方法在电网电压正弦和非正弦条件下都可以很好地适用,且检测精度高、动态性能好,同时应用于单相并联型有源滤波器中的电压正弦和电压非正弦情况下都能很好地对谐波与无功进行补偿。A single-phase harmonic detection method based on conservative power theory is proposed,which combines the second-order generalized integrator phase-locked loop to realize the extraction of fundamental voltage components and the suppression of harmonic voltage.The inspection method features simple principle,clear structure and easy operation.It is verified by simulation that the detection method is well applicable to both sinusoidal and non-sinusoidal grid voltage conditions with high detection accuracy and good dynamic performance while well compensating harmonic components and reactive power under sinusoidal and non-sinusoidal grid voltage conditions when it is applied in single-phase parallel-type active filters.

关 键 词：低压配电网 单相谐波检测 守恒功率理论 二阶广义积分器锁相环 

分 类 号：TM642.2[电气工程—电力系统及自动化]