发明名称 |
UTILITY METERING SYSTEM HAVING WAVEFORM CAPTURE FOR POWER QUALITY MONITORING |
摘要 |
A method of monitoring variations is carried out within an electrical energy meter containing means therein for metering a quantity of electrical energy generated by a supplier and transferred via a power supply line to a load. The method includes a first step of sensing a line voltage transferred via the power supply line to the load during the energy measurement time interval. The method also includes the step of detecting a variation in a magnitude of the sensed line voltage relative to an acceptable voltage level, wherein the variation exceeds a first variation threshold. The method then includes the step of capturing a first waveform of the sensed line voltage corresponding to the time when the variation is detected. Finally, the method includes the steps of detecting a subsequent reduction in the variation of the magnitude of the sensed line voltage such that the variation is equal to or less than the first variation threshold and capturing a second waveform of the sensed line voltage corresponding to the time when the subsequent reduction in the variation is detected.
|
申请公布号 |
CA2353929(C) |
申请公布日期 |
2009.02.10 |
申请号 |
CA19992353929 |
申请日期 |
1999.12.23 |
申请人 |
SIEMENS POWER TRANSMISSION & DISTRIBUTION, INC. |
发明人 |
JENRETTE, WILLIAM I.;GRIFFIN, PAUL M., JR. |
分类号 |
G01R29/00;G01R19/165;G01R19/25;G01R21/133;G01R22/10;H02J13/00;H04M11/06;H04Q9/00 |
主分类号 |
G01R29/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|