摘要
介绍了以锁相控制原理对电网电压波形进行同步跟踪监测,通过实时检测工频(50 Hz)电压每个半周波的峰值电压,经处理后与设定值进行分析判定,当电压波动幅度大于预设限值时输出控制信号。设计的检测线路可精确侦测一个半波10 ms内交流电压的失压情况,电路检测准确、灵敏度高,为工业电网实时控制提供了有效手段。
The synchronous tracking and monitoring of power grid voltage waveform based on the principle of phase-locked control is introduced.Through real-time detection of the peak voltage of each half cycle of the power frequency(50 Hz)voltage,after processing,it is analyzed and determined with the set value.When the voltage fluctuation amplitude is greater than the preset limit,a control signal is output.The designed detection circuit can accurately detect the loss of AC voltage within 10ms of a half-wave.The circuit detection is accurate and highly sensitive,which provides an effective means for real-time control of industrial power grids.
作者
马宁强
乔旭
秦浩
MA Ningqiang;QIAO Xu;QIN Hao(Xi′an PERI Power Semiconductor Converter Technology Co.,Ltd.,Xi′an 710077,China)
出处
《电工技术》
2021年第16期129-131,134,共4页
Electric Engineering
关键词
锁相
同步
峰值采样
电网失压
phase-locked
synchronous
peak sampling
grid voltage loss
