中国电机工程学报Issue(36)：104-111,8.
采用正弦幅值积分器的电网基波电压同步信号检测
Synchronization Signal Detection for Grid Fundamental Voltage Through Employing Sinusoidal Amplitude Integrators
摘要
Abstract
The control of three-phase grid-tied converters needs the accuracy detection of the grid synchronization signal. In case of the imbalance grid voltage condition, the separation of the positive-sequence and negative-sequence components of the fundamental grid voltage is critical. A grid synchronization method based on sinusoidal amplitude integrators (SAI) is proposed in this paper with the property of fast and accuracy separation of positive-sequence and negative-sequence components under grid frequency variation condition. The synchronization signal detection structure and circuit are proposed based on the decomposition of the grid voltage. The time-domain and frequency-domain models are set up for analyzing the mechanism of the synchronization. Also, the feedback coefficient is determined based on the models. The effect of the frequency variation to the synchronization is analyzed and a frequency adaptive algorithm is presented to overcome this effect. The presented method can separate the positive and negative sequence components without symmetrical components decomposition with simple structure and low calculation burden compared with other methods. The theoretical, simulation and experimental results indicate that the presented synchronization method has the property of separate the positive-sequence and negative-sequence components for imbalance grid voltage even under grid frequency variation condition.关键词
同步信号/正弦幅值积分器/不对称/幅值/相位Key words
synchronization signal/sinusoidal amplitude integrator/imbalance/amplitude/phase分类
信息技术与安全科学引用本文复制引用
杜雄,王国宁,孙鹏菊,周雒维..采用正弦幅值积分器的电网基波电压同步信号检测[J].中国电机工程学报,2013,(36):104-111,8.基金项目
国家自然科学基金项目(51277191)；重庆市杰出青年科学基金项目(CSTC2012JJJQ90004)；输配电装备及系统安全与新技术国家重点实验室重点项目(2007DA10512711101)。Project Supported by National Natural Science Foundation of China (51277191) （51277191）
Natural Science Foundation Project of CQ CSTC (CSTC2012JJJQ90004) （CSTC2012JJJQ90004）
Scientific Research Foundation of State Key Lab of Power Transmission Equipment and System Security (2007DA10512711101) （2007DA10512711101）
