| 引用本文: | 邵振华,陈 冲,林瑞全.基于复合二阶广义积分的频率自适应谐波电流检测[J].电力自动化设备,2012,32(6): |
| SHAO Zhenhua,CHEN Chong,LIN Ruiquan.Harmonic current detection with adaptive frequency tracking based on multiple second-order generalized integrators[J].Electric Power Automation Equipment,2012,32(6): |
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| 摘要: |
| 提出了一种基于复合二阶广义积分的频率自适应谐波电流检测方法，利用双重二阶广义积分器实现滤波和改善锁频的功能；同时利用交叉对消反馈网络来实现各个谐波分量之间的解耦，利用该环节的带通滤波的功能，从而达到独立实时地检测出电网电流中的基波和任意次谐波分量的目的。针对电网频率波动的情况，采用改进的锁频环结构在线跟踪系统频率变化情况。该方法省略了低通滤波环节，用简化的锁频环节替代锁相环，稳态精度高，锁频效果理想。最后利用MATLAB进行仿真分析，仿真结果表明该方法可行有效。 |
| 关键词: 谐波分析 锁相环 锁频环 双重二阶广义积分 交叉对消反馈网络 |
| DOI： |
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| 基金项目:福建省自然科学基金资助项目（2008J040416）；厦门重大科技资助项目（3502Z201111008） |
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| Harmonic current detection with adaptive frequency tracking based on multiple second-order generalized integrators |
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SHAO Zhenhua, CHEN Chong, LIN Ruiquan
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College of Electrical Engineering & Automation，Fuzhou University，Fuzhou 350108，China
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| Abstract: |
| The harmonic current detection based on multiple SOGIs（Second-Order Generalized Integrators） is proposed，which adopts two SOGIs to build the low-pass filter and improve the performance of FLL（Frequency Locked Loop）. The cross-feedback network is applied to decouple different harmonics and the band-pass filtering is used to individually detect the fundamental or each harmonic current in real time. The grid frequency is online tracked by an enhanced FLL. The low-pass filter is cancelled and the phase locked loop is replaced by the simplified FLL with higher steady-state precision and better frequency-locking performance. The results of simulation with MATLAB／Simulink verify the validity of the proposed method. |
| Key words: harmonic analysis phase locked loops frequency locked loop dual second-order generalized integrator cross-feedback network |
