A three-phase sag generator for testing industrial equipment
A three-phase sag generator for testing industrial equipment
复制标题
用于测试工业设备的三相电压跌落发生器
DOI：
--
复制
发表时间：
1996
期刊：
影响因子：
--
通讯作者：
R. Morgan
中科院分区：
文献类型：
--
作者：
E. R. Collins;R. Morgan
对一台柴油机供电的480 V、15 kW、60 Hz三相备用同步发电机进行了改造，使其具有可控的三相电压暂降。这些凹陷的深度和持续时间都可以控制。带有数据采集系统的486计算机控制发生器并监测被测系统。定制软件界面允许用户选择每个凹陷的深度和持续时间。通常，用户将以可选择的增量选择一系列凹陷，直到一定深度。数据采集系统具有数字和模拟输入，因此可以在测试期间监控数据线、交流和直流电压和电流、接触器和继电器等。软件界面使用户能够为监测信号选择允许的公差带。如果一个或多个信号福尔斯落在允许范围之外，则暂停测试。然后记录导致设备“未通过”测试的下垂深度和持续时间。在下垂持续时间范围内进行测试后，CBEMA型曲线可用于测试中的系统。下垂发生器使用户能够系统地确定已安装的生产线的组件的灵敏度。这将使用户能够确定具有成本效益的穿越增强策略或测试当前安装的设备的有效性。虽然这个测试发电机很小，但其基本概念可以扩展到2 MVA范围。
A diesel powered three-phase standby 480 V, 15 kW, 60 Hz synchronous generator has been modified to give controlled three-phase voltage sags. These sags can be controlled in both depth and duration. A 486-based computer with a data acquisition system controls the generator and monitors the system under test. The custom software interface allows the user to select the depth and duration of the each sag. Typically, the user will select a series of sags in selectable increments down to a certain depth. The data acquisition system has both digital and analog inputs, so that data lines, AC and DC voltages and currents, contactors and relays, etc. can be monitored during the tests. The software interface enables the user to select allowable tolerance bands for the monitored signals. If one or more of the signals falls outside the allowable range, the test is suspended. The sag depth and duration that caused the equipment to "fail" the test is then recorded, After testing over a range of sag durations, a CBEMA-type curve is available for the system under test. The sag generator enables the user to systematically determine the sensitivity of the components of an installed process line. This will enable the user to determine cost-effective ride-through enhancement strategies or to test the effectiveness of currently installed equipment. Although this test generator is small, the basic concept can be scaled up to the 2 MVA range.